[{"keyword":["Computer Graphics and Computer-Aided Design"],"article_processing_charge":"Yes (in subscription journal)","has_accepted_license":"1","day":"01","citation":{"ama":"Makatura L, Wang B, Chen Y-L, et al. Procedural metamaterials: A unified procedural graph for metamaterial design. ACM Transactions on Graphics. 2023;42(5). doi:10.1145/3605389","ieee":"L. Makatura et al., “Procedural metamaterials: A unified procedural graph for metamaterial design,” ACM Transactions on Graphics, vol. 42, no. 5. Association for Computing Machinery, 2023.","apa":"Makatura, L., Wang, B., Chen, Y.-L., Deng, B., Wojtan, C., Bickel, B., & Matusik, W. (2023). Procedural metamaterials: A unified procedural graph for metamaterial design. ACM Transactions on Graphics. Association for Computing Machinery. https://doi.org/10.1145/3605389","ista":"Makatura L, Wang B, Chen Y-L, Deng B, Wojtan C, Bickel B, Matusik W. 2023. Procedural metamaterials: A unified procedural graph for metamaterial design. ACM Transactions on Graphics. 42(5), 168.","short":"L. Makatura, B. Wang, Y.-L. Chen, B. Deng, C. Wojtan, B. Bickel, W. Matusik, ACM Transactions on Graphics 42 (2023).","mla":"Makatura, Liane, et al. “Procedural Metamaterials: A Unified Procedural Graph for Metamaterial Design.” ACM Transactions on Graphics, vol. 42, no. 5, 168, Association for Computing Machinery, 2023, doi:10.1145/3605389.","chicago":"Makatura, Liane, Bohan Wang, Yi-Lu Chen, Bolei Deng, Chris Wojtan, Bernd Bickel, and Wojciech Matusik. “Procedural Metamaterials: A Unified Procedural Graph for Metamaterial Design.” ACM Transactions on Graphics. Association for Computing Machinery, 2023. https://doi.org/10.1145/3605389."},"publication":"ACM Transactions on Graphics","article_type":"original","date_published":"2023-10-01T00:00:00Z","type":"journal_article","issue":"5","abstract":[{"text":"We introduce a compact, intuitive procedural graph representation for cellular metamaterials, which are small-scale, tileable structures that can be architected to exhibit many useful material properties. Because the structures’ “architectures” vary widely—with elements such as beams, thin shells, and solid bulks—it is difficult to explore them using existing representations. Generic approaches like voxel grids are versatile, but it is cumbersome to represent and edit individual structures; architecture-specific approaches address these issues, but are incompatible with one another. By contrast, our procedural graph succinctly represents the construction process for any structure using a simple skeleton annotated with spatially varying thickness. To express the highly constrained triply periodic minimal surfaces (TPMS) in this manner, we present the first fully automated version of the conjugate surface construction method, which allows novices to create complex TPMS from intuitive input. We demonstrate our representation’s expressiveness, accuracy, and compactness by constructing a wide range of established structures and hundreds of novel structures with diverse architectures and material properties. We also conduct a user study to verify our representation’s ease-of-use and ability to expand engineers’ capacity for exploration.","lang":"eng"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","_id":"14628","intvolume":" 42","ddc":["531","006"],"title":"Procedural metamaterials: A unified procedural graph for metamaterial design","status":"public","file":[{"relation":"main_file","file_id":"14630","checksum":"0192f597d7a2ceaf89baddfd6190d4c8","success":1,"date_created":"2023-11-29T15:16:01Z","date_updated":"2023-11-29T15:16:01Z","access_level":"open_access","file_name":"tog-22-0089-File004.zip","file_size":95467870,"content_type":"application/zip","creator":"yichen"},{"content_type":"application/zip","file_size":103731880,"creator":"yichen","access_level":"open_access","file_name":"tog-22-0089-File005.zip","checksum":"7fb024963be81933494f38de191e4710","success":1,"date_updated":"2023-11-29T15:16:01Z","date_created":"2023-11-29T15:16:01Z","relation":"main_file","file_id":"14631"},{"relation":"main_file","file_id":"14638","checksum":"b7d6829ce396e21cac9fae0ec7130a6b","success":1,"date_updated":"2023-12-04T08:04:14Z","date_created":"2023-12-04T08:04:14Z","access_level":"open_access","file_name":"2023_ACMToG_Makatura.pdf","content_type":"application/pdf","file_size":57067476,"creator":"dernst"}],"oa_version":"Published Version","publication_identifier":{"issn":["0730-0301","1557-7368"]},"month":"10","oa":1,"project":[{"grant_number":"101045083","_id":"34bc2376-11ca-11ed-8bc3-9a3b3961a088","name":"Computational Discovery of Numerical Algorithms for Animation and Simulation of Natural Phenomena"}],"quality_controlled":"1","doi":"10.1145/3605389","language":[{"iso":"eng"}],"article_number":"168","file_date_updated":"2023-12-04T08:04:14Z","acknowledgement":"The authors thank Mina Konaković Luković and Michael Foshey for their early contributions to this project, David Palmer and Paul Zhang for their insightful discussions about minimal surfaces and the CSCM, Julian Panetta for providing the Elastic Textures code, and Hannes Hergeth for his feedback and support. We also thank our user study participants and anonymous reviewers.\r\nThis material is based upon work supported by the National Science Foundation\r\n(NSF) Graduate Research Fellowship under Grant No. 2141064; the MIT Morningside\r\nAcademy for Design Fellowship; the Defense Advanced Research Projects Agency\r\n(DARPA) Grant No. FA8750-20-C-0075; the ERC Consolidator Grant No. 101045083,\r\n“CoDiNA: Computational Discovery of Numerical Algorithms for Animation and Simulation of Natural Phenomena”; and the NewSat project, which is co-funded by the Operational Program for Competitiveness and Internationalisation (COMPETE2020), Portugal 2020, the European Regional Development Fund (ERDF), and the Portuguese Foundation for Science and Technology (FTC) under the MIT Portugal program.","year":"2023","department":[{"_id":"GradSch"},{"_id":"ChWo"},{"_id":"BeBi"}],"publisher":"Association for Computing Machinery","publication_status":"published","author":[{"full_name":"Makatura, Liane","last_name":"Makatura","first_name":"Liane"},{"full_name":"Wang, Bohan","first_name":"Bohan","last_name":"Wang"},{"id":"0b467602-dbcd-11ea-9d1d-ed480aa46b70","last_name":"Chen","first_name":"Yi-Lu","full_name":"Chen, Yi-Lu"},{"last_name":"Deng","first_name":"Bolei","full_name":"Deng, Bolei"},{"orcid":"0000-0001-6646-5546","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","last_name":"Wojtan","first_name":"Christopher J","full_name":"Wojtan, Christopher J"},{"full_name":"Bickel, Bernd","last_name":"Bickel","first_name":"Bernd","orcid":"0000-0001-6511-9385","id":"49876194-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Matusik, Wojciech","first_name":"Wojciech","last_name":"Matusik"}],"volume":42,"date_created":"2023-11-29T15:02:03Z","date_updated":"2023-12-04T08:09:05Z"},{"file_date_updated":"2024-01-02T09:34:27Z","article_number":"83","author":[{"full_name":"Jeschke, Stefan","id":"44D6411A-F248-11E8-B48F-1D18A9856A87","first_name":"Stefan","last_name":"Jeschke"},{"last_name":"Wojtan","first_name":"Christopher J","orcid":"0000-0001-6646-5546","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","full_name":"Wojtan, Christopher J"}],"volume":42,"date_created":"2023-08-27T22:01:17Z","date_updated":"2024-01-02T09:35:55Z","acknowledgement":"We thank Georg Sperl for helping with early research for this paper, Mickael Ly and Yi-Lu Chen for proofreading, and members of the ISTA Visual Computing Group for general feedback. This project was funded in part by the European Research Council (ERC Consolidator Grant 101045083 CoDiNA).\r\nThe motorboat and sailboat were modeled by Sergei and the palmtrees by YadroGames. The environment map was created by Emil Persson.","year":"2023","department":[{"_id":"ChWo"}],"publisher":"Association for Computing Machinery","publication_status":"published","publication_identifier":{"issn":["0730-0301"],"eissn":["1557-7368"]},"month":"08","doi":"10.1145/3592098","language":[{"iso":"eng"}],"acknowledged_ssus":[{"_id":"ScienComp"}],"oa":1,"tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png"},"external_id":{"isi":["001044671300049"]},"project":[{"name":"Computational Discovery of Numerical Algorithms for Animation and Simulation of Natural Phenomena","_id":"34bc2376-11ca-11ed-8bc3-9a3b3961a088","grant_number":"101045083"}],"quality_controlled":"1","isi":1,"issue":"4","abstract":[{"text":"This paper introduces a novel method for simulating large bodies of water as a height field. At the start of each time step, we partition the waves into a bulk flow (which approximately satisfies the assumptions of the shallow water equations) and surface waves (which approximately satisfy the assumptions of Airy wave theory). We then solve the two wave regimes separately using appropriate state-of-the-art techniques, and re-combine the resulting wave velocities at the end of each step. This strategy leads to the first heightfield wave model capable of simulating complex interactions between both deep and shallow water effects, like the waves from a boat wake sloshing up onto a beach, or a dam break producing wave interference patterns and eddies. We also analyze the numerical dispersion created by our method and derive an exact correction factor for waves at a constant water depth, giving us a numerically perfect re-creation of theoretical water wave dispersion patterns.","lang":"eng"}],"type":"journal_article","file":[{"file_id":"14704","relation":"main_file","success":1,"checksum":"1d178bb2f8011d9f5aedda6427e18c7a","date_updated":"2023-12-21T12:26:40Z","date_created":"2023-12-21T12:26:40Z","access_level":"open_access","file_name":"PaperVideo_final.mp4","creator":"sjeschke","content_type":"video/mp4","file_size":511572575},{"creator":"dernst","content_type":"application/pdf","file_size":7469177,"access_level":"open_access","file_name":"2023_ACMToG_Jeschke.pdf","success":1,"checksum":"a49b2e744d5cd1276bb8b2e0ce6dc638","date_created":"2024-01-02T09:34:27Z","date_updated":"2024-01-02T09:34:27Z","file_id":"14725","relation":"main_file"}],"oa_version":"Published Version","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","_id":"14240","intvolume":" 42","status":"public","title":"Generalizing shallow water simulations with dispersive surface waves","ddc":["000"],"article_processing_charge":"Yes (in subscription journal)","has_accepted_license":"1","day":"01","scopus_import":"1","date_published":"2023-08-01T00:00:00Z","citation":{"ama":"Jeschke S, Wojtan C. Generalizing shallow water simulations with dispersive surface waves. ACM Transactions on Graphics. 2023;42(4). doi:10.1145/3592098","apa":"Jeschke, S., & Wojtan, C. (2023). Generalizing shallow water simulations with dispersive surface waves. ACM Transactions on Graphics. Association for Computing Machinery. https://doi.org/10.1145/3592098","ieee":"S. Jeschke and C. Wojtan, “Generalizing shallow water simulations with dispersive surface waves,” ACM Transactions on Graphics, vol. 42, no. 4. Association for Computing Machinery, 2023.","ista":"Jeschke S, Wojtan C. 2023. Generalizing shallow water simulations with dispersive surface waves. ACM Transactions on Graphics. 42(4), 83.","short":"S. Jeschke, C. Wojtan, ACM Transactions on Graphics 42 (2023).","mla":"Jeschke, Stefan, and Chris Wojtan. “Generalizing Shallow Water Simulations with Dispersive Surface Waves.” ACM Transactions on Graphics, vol. 42, no. 4, 83, Association for Computing Machinery, 2023, doi:10.1145/3592098.","chicago":"Jeschke, Stefan, and Chris Wojtan. “Generalizing Shallow Water Simulations with Dispersive Surface Waves.” ACM Transactions on Graphics. Association for Computing Machinery, 2023. https://doi.org/10.1145/3592098."},"publication":"ACM Transactions on Graphics","article_type":"original"},{"publication_identifier":{"isbn":["9798400702686"]},"article_processing_charge":"No","day":"01","month":"08","project":[{"name":"Computational Discovery of Numerical Algorithms for Animation and Simulation of Natural Phenomena","grant_number":"101045083","_id":"34bc2376-11ca-11ed-8bc3-9a3b3961a088"}],"quality_controlled":"1","citation":{"chicago":"Chen, Yi-Lu, Mickaël Ly, and Chris Wojtan. “Unified Treatment of Contact, Friction and Shock-Propagation in Rigid Body Animation.” In Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Computer Animation. Association for Computing Machinery, 2023. https://doi.org/10.1145/3606037.3606836.","mla":"Chen, Yi-Lu, et al. “Unified Treatment of Contact, Friction and Shock-Propagation in Rigid Body Animation.” Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Computer Animation, 5, Association for Computing Machinery, 2023, doi:10.1145/3606037.3606836.","short":"Y.-L. Chen, M. Ly, C. Wojtan, in:, Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Computer Animation, Association for Computing Machinery, 2023.","ista":"Chen Y-L, Ly M, Wojtan C. 2023. Unified treatment of contact, friction and shock-propagation in rigid body animation. Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Computer Animation. SCA: Symposium on Computer Animation, 5.","apa":"Chen, Y.-L., Ly, M., & Wojtan, C. (2023). Unified treatment of contact, friction and shock-propagation in rigid body animation. In Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Computer Animation. Los Angeles, CA, United States: Association for Computing Machinery. https://doi.org/10.1145/3606037.3606836","ieee":"Y.-L. Chen, M. Ly, and C. Wojtan, “Unified treatment of contact, friction and shock-propagation in rigid body animation,” in Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Computer Animation, Los Angeles, CA, United States, 2023.","ama":"Chen Y-L, Ly M, Wojtan C. Unified treatment of contact, friction and shock-propagation in rigid body animation. In: Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Computer Animation. Association for Computing Machinery; 2023. doi:10.1145/3606037.3606836"},"publication":"Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Computer Animation","language":[{"iso":"eng"}],"acknowledged_ssus":[{"_id":"ScienComp"}],"date_published":"2023-08-01T00:00:00Z","doi":"10.1145/3606037.3606836","conference":{"end_date":"2023-08-06","location":"Los Angeles, CA, United States","start_date":"2023-08-04","name":"SCA: Symposium on Computer Animation"},"type":"conference_abstract","article_number":"5","department":[{"_id":"ChWo"}],"publisher":"Association for Computing Machinery","status":"public","title":"Unified treatment of contact, friction and shock-propagation in rigid body animation","publication_status":"published","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","_id":"14748","year":"2023","acknowledgement":"We thank the anonymous reviewers and the members of the Visual Computing Group at ISTA for their helpful comments. This research was supported by the Scientific Service Units (SSU) of ISTA through resources provided by Scientific Computing, and was funded in part by the European Union (ERC-2021-COG 101045083 CoDiNA).","oa_version":"None","date_created":"2024-01-08T13:00:24Z","date_updated":"2024-02-28T12:51:40Z","author":[{"last_name":"Chen","first_name":"Yi-Lu","id":"0b467602-dbcd-11ea-9d1d-ed480aa46b70","full_name":"Chen, Yi-Lu"},{"full_name":"Ly, Mickaël","id":"6340d7f0-b48d-11eb-b10d-b7487e71d9f1","last_name":"Ly","first_name":"Mickaël"},{"orcid":"0000-0001-6646-5546","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","last_name":"Wojtan","first_name":"Christopher J","full_name":"Wojtan, Christopher J"}]},{"day":"01","article_processing_charge":"No","scopus_import":"1","date_published":"2022-05-01T00:00:00Z","publication":"Computer Graphics Forum","citation":{"ista":"Schreck C, Wojtan C. 2022. Coupling 3D liquid simulation with 2D wave propagation for large scale water surface animation using the equivalent sources method. Computer Graphics Forum. 41(2), 343–353.","ieee":"C. Schreck and C. Wojtan, “Coupling 3D liquid simulation with 2D wave propagation for large scale water surface animation using the equivalent sources method,” Computer Graphics Forum, vol. 41, no. 2. Wiley, pp. 343–353, 2022.","apa":"Schreck, C., & Wojtan, C. (2022). Coupling 3D liquid simulation with 2D wave propagation for large scale water surface animation using the equivalent sources method. Computer Graphics Forum. Wiley. https://doi.org/10.1111/cgf.14478","ama":"Schreck C, Wojtan C. Coupling 3D liquid simulation with 2D wave propagation for large scale water surface animation using the equivalent sources method. Computer Graphics Forum. 2022;41(2):343-353. doi:10.1111/cgf.14478","chicago":"Schreck, Camille, and Chris Wojtan. “Coupling 3D Liquid Simulation with 2D Wave Propagation for Large Scale Water Surface Animation Using the Equivalent Sources Method.” Computer Graphics Forum. Wiley, 2022. https://doi.org/10.1111/cgf.14478.","mla":"Schreck, Camille, and Chris Wojtan. “Coupling 3D Liquid Simulation with 2D Wave Propagation for Large Scale Water Surface Animation Using the Equivalent Sources Method.” Computer Graphics Forum, vol. 41, no. 2, Wiley, 2022, pp. 343–53, doi:10.1111/cgf.14478.","short":"C. Schreck, C. Wojtan, Computer Graphics Forum 41 (2022) 343–353."},"article_type":"original","page":"343-353","abstract":[{"text":"This paper proposes a method for simulating liquids in large bodies of water by coupling together a water surface wave simulator with a 3D Navier-Stokes simulator. The surface wave simulation uses the equivalent sources method (ESM) to efficiently animate large bodies of water with precisely controllable wave propagation behavior. The 3D liquid simulator animates complex non-linear fluid behaviors like splashes and breaking waves using off-the-shelf simulators using FLIP or the level set method with semi-Lagrangian advection.\r\nWe combine the two approaches by using the 3D solver to animate localized non-linear behaviors, and the 2D wave solver to animate larger regions with linear surface physics. We use the surface motion from the 3D solver as boundary conditions for 2D surface wave simulator, and we use the velocity and surface heights from the 2D surface wave simulator as boundary conditions for the 3D fluid simulation. We also introduce a novel technique for removing visual artifacts caused by numerical errors in 3D fluid solvers: we use experimental data to estimate the artificial dispersion caused by the 3D solver and we then carefully tune the wave speeds of the 2D solver to match it, effectively eliminating any differences in wave behavior across the boundary. To the best of our knowledge, this is the first time such a empirically driven error compensation approach has been used to remove coupling errors from a physics simulator.\r\nOur coupled simulation approach leverages the strengths of each simulation technique, animating large environments with seamless transitions between 2D and 3D physics.","lang":"eng"}],"issue":"2","type":"journal_article","oa_version":"Submitted Version","_id":"11432","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","title":"Coupling 3D liquid simulation with 2D wave propagation for large scale water surface animation using the equivalent sources method","status":"public","intvolume":" 41","month":"05","publication_identifier":{"eissn":["1467-8659"],"issn":["0167-7055"]},"doi":"10.1111/cgf.14478","acknowledged_ssus":[{"_id":"ScienComp"}],"language":[{"iso":"eng"}],"main_file_link":[{"url":"https://hal.archives-ouvertes.fr/hal-03641349/","open_access":"1"}],"external_id":{"isi":["000802723900027"]},"oa":1,"quality_controlled":"1","isi":1,"project":[{"name":"Efficient Simulation of Natural Phenomena at Extremely Large Scales","call_identifier":"H2020","grant_number":"638176","_id":"2533E772-B435-11E9-9278-68D0E5697425"}],"ec_funded":1,"author":[{"id":"2B14B676-F248-11E8-B48F-1D18A9856A87","last_name":"Schreck","first_name":"Camille","full_name":"Schreck, Camille"},{"full_name":"Wojtan, Christopher J","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6646-5546","first_name":"Christopher J","last_name":"Wojtan"}],"date_created":"2022-06-05T22:01:49Z","date_updated":"2023-08-02T06:44:05Z","volume":41,"year":"2022","acknowledgement":"We wish to thank the anonymous reviewers and the members of the Visual Computing Group at IST Austria and MFX Team at INRIA for their valuable feedback. This research was supported by the Scientific Service Units (SSU) of IST Austria through resources provided by Scientific Computing. This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 638176.","publication_status":"published","publisher":"Wiley","department":[{"_id":"ChWo"}]},{"article_number":"65","publisher":"Association for Computing Machinery","department":[{"_id":"ChWo"}],"publication_status":"published","acknowledgement":"We wish to thank the anonymous reviewers for their helpful comments. To develop this project, we were helped by many people both at Under Armour (Clay Dean, Randall Harward, Kyle Blakely, Craig Simile, Michael Seiz, Brooke Malone, Brittainy McFarland, Emilie Phan, Lindsey Kern, Courtney Oswald, Haley Barkley, Bob Chin, Adam Bayer, Connie Kwok, Marielle Newman, Nick Pence, Allison Hicks, Allison White, Candace Rubenstein, Jeremy Stangland, Fred Fagergren, Michael Mazzoleni, Nathaniel Berry, Manuel Frank) and SEDDI (Gabriel Cirio, Alejandro Rodríguez, Sofía Dominguez, Alicia Nicas, Elena Garcés, Daniel Rodríguez, David Pascual, Manuel Godoy, Sergio Suja, Sergio Ruiz, Roberto Condori, Alberto Martín, Graham Sullivan). We also thank the members of the Visual Computing Group at IST Austria and the Multimodal Simulation Lab at URJC for their feedback. This research was supported by the Scientific Service Units (SSU) of IST Austria through resources provided by Scientific Computing, and it was funded in part by the European Research Council (ERC Consolidator Grant 772738 TouchDesign).","year":"2022","volume":41,"date_created":"2022-08-07T22:01:58Z","date_updated":"2023-08-03T12:38:30Z","related_material":{"record":[{"status":"public","relation":"dissertation_contains","id":"12358"}],"link":[{"url":"https://ista.ac.at/en/news/digital-yarn-real-socks/","relation":"press_release","description":"News on the ISTA website"}]},"author":[{"full_name":"Sperl, Georg","first_name":"Georg","last_name":"Sperl","id":"4DD40360-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Sánchez-Banderas","first_name":"Rosa M.","full_name":"Sánchez-Banderas, Rosa M."},{"first_name":"Manwen","last_name":"Li","full_name":"Li, Manwen"},{"full_name":"Wojtan, Christopher J","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6646-5546","first_name":"Christopher J","last_name":"Wojtan"},{"full_name":"Otaduy, Miguel A.","last_name":"Otaduy","first_name":"Miguel A."}],"publication_identifier":{"issn":["0730-0301"],"eissn":["1557-7368"]},"month":"07","quality_controlled":"1","isi":1,"external_id":{"isi":["000830989200114"]},"main_file_link":[{"open_access":"1","url":"https://doi.org/10.1145/3528223.3530167"}],"oa":1,"language":[{"iso":"eng"}],"acknowledged_ssus":[{"_id":"ScienComp"}],"doi":"10.1145/3528223.3530167","type":"journal_article","issue":"4","abstract":[{"lang":"eng","text":"This paper introduces a methodology for inverse-modeling of yarn-level mechanics of cloth, based on the mechanical response of fabrics in the real world. We compiled a database from physical tests of several different knitted fabrics used in the textile industry. These data span different types of complex knit patterns, yarn compositions, and fabric finishes, and the results demonstrate diverse physical properties like stiffness, nonlinearity, and anisotropy.\r\n\r\nWe then develop a system for approximating these mechanical responses with yarn-level cloth simulation. To do so, we introduce an efficient pipeline for converting between fabric-level data and yarn-level simulation, including a novel swatch-level approximation for speeding up computation, and some small-but-necessary extensions to yarn-level models used in computer graphics. The dataset used for this paper can be found at http://mslab.es/projects/YarnLevelFabrics."}],"intvolume":" 41","title":"Estimation of yarn-level simulation models for production fabrics","status":"public","_id":"11736","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","oa_version":"Published Version","scopus_import":"1","article_processing_charge":"No","day":"22","article_type":"original","citation":{"short":"G. Sperl, R.M. Sánchez-Banderas, M. Li, C. Wojtan, M.A. Otaduy, ACM Transactions on Graphics 41 (2022).","mla":"Sperl, Georg, et al. “Estimation of Yarn-Level Simulation Models for Production Fabrics.” ACM Transactions on Graphics, vol. 41, no. 4, 65, Association for Computing Machinery, 2022, doi:10.1145/3528223.3530167.","chicago":"Sperl, Georg, Rosa M. Sánchez-Banderas, Manwen Li, Chris Wojtan, and Miguel A. Otaduy. “Estimation of Yarn-Level Simulation Models for Production Fabrics.” ACM Transactions on Graphics. Association for Computing Machinery, 2022. https://doi.org/10.1145/3528223.3530167.","ama":"Sperl G, Sánchez-Banderas RM, Li M, Wojtan C, Otaduy MA. Estimation of yarn-level simulation models for production fabrics. ACM Transactions on Graphics. 2022;41(4). doi:10.1145/3528223.3530167","ieee":"G. Sperl, R. M. Sánchez-Banderas, M. Li, C. Wojtan, and M. A. Otaduy, “Estimation of yarn-level simulation models for production fabrics,” ACM Transactions on Graphics, vol. 41, no. 4. Association for Computing Machinery, 2022.","apa":"Sperl, G., Sánchez-Banderas, R. M., Li, M., Wojtan, C., & Otaduy, M. A. (2022). Estimation of yarn-level simulation models for production fabrics. ACM Transactions on Graphics. Association for Computing Machinery. https://doi.org/10.1145/3528223.3530167","ista":"Sperl G, Sánchez-Banderas RM, Li M, Wojtan C, Otaduy MA. 2022. Estimation of yarn-level simulation models for production fabrics. ACM Transactions on Graphics. 41(4), 65."},"publication":"ACM Transactions on Graphics","date_published":"2022-07-22T00:00:00Z"},{"citation":{"ieee":"S. Ishida, C. Wojtan, and A. Chern, “Hidden degrees of freedom in implicit vortex filaments,” ACM Transactions on Graphics, vol. 41, no. 6. Association for Computing Machinery, 2022.","apa":"Ishida, S., Wojtan, C., & Chern, A. (2022). Hidden degrees of freedom in implicit vortex filaments. ACM Transactions on Graphics. Association for Computing Machinery. https://doi.org/10.1145/3550454.3555459","ista":"Ishida S, Wojtan C, Chern A. 2022. Hidden degrees of freedom in implicit vortex filaments. ACM Transactions on Graphics. 41(6), 241.","ama":"Ishida S, Wojtan C, Chern A. Hidden degrees of freedom in implicit vortex filaments. ACM Transactions on Graphics. 2022;41(6). doi:10.1145/3550454.3555459","chicago":"Ishida, Sadashige, Chris Wojtan, and Albert Chern. “Hidden Degrees of Freedom in Implicit Vortex Filaments.” ACM Transactions on Graphics. Association for Computing Machinery, 2022. https://doi.org/10.1145/3550454.3555459.","short":"S. Ishida, C. Wojtan, A. Chern, ACM Transactions on Graphics 41 (2022).","mla":"Ishida, Sadashige, et al. “Hidden Degrees of Freedom in Implicit Vortex Filaments.” ACM Transactions on Graphics, vol. 41, no. 6, 241, Association for Computing Machinery, 2022, doi:10.1145/3550454.3555459."},"publication":"ACM Transactions on Graphics","article_type":"original","date_published":"2022-12-01T00:00:00Z","scopus_import":"1","has_accepted_license":"1","article_processing_charge":"No","day":"01","_id":"12431","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","intvolume":" 41","title":"Hidden degrees of freedom in implicit vortex filaments","status":"public","ddc":["000"],"file":[{"access_level":"open_access","file_name":"2022_ACM_Ishida.pdf","file_size":15551202,"content_type":"application/pdf","creator":"dernst","relation":"main_file","file_id":"12433","checksum":"a2fba257fdefe0e747182be6c0f7c70c","success":1,"date_created":"2023-01-30T07:15:48Z","date_updated":"2023-01-30T07:15:48Z"}],"oa_version":"Published Version","type":"journal_article","issue":"6","abstract":[{"lang":"eng","text":"This paper presents a new representation of curve dynamics, with applications to vortex filaments in fluid dynamics. Instead of representing these filaments with explicit curve geometry and Lagrangian equations of motion, we represent curves implicitly with a new co-dimensional 2 level set description. Our implicit representation admits several redundant mathematical degrees of freedom in both the configuration and the dynamics of the curves, which can be tailored specifically to improve numerical robustness, in contrast to naive approaches for implicit curve dynamics that suffer from overwhelming numerical stability problems. Furthermore, we note how these hidden degrees of freedom perfectly map to a Clebsch representation in fluid dynamics. Motivated by these observations, we introduce untwisted level set functions and non-swirling dynamics which successfully regularize sources of numerical instability, particularly in the twisting modes around curve filaments. A consequence is a novel simulation method which produces stable dynamics for large numbers of interacting vortex filaments and effortlessly handles topological changes and re-connection events."}],"external_id":{"isi":["000891651900061"]},"tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png"},"oa":1,"project":[{"name":"Computational Discovery of Numerical Algorithms for Animation and Simulation of Natural Phenomena","grant_number":"101045083","_id":"34bc2376-11ca-11ed-8bc3-9a3b3961a088"}],"isi":1,"quality_controlled":"1","doi":"10.1145/3550454.3555459","language":[{"iso":"eng"}],"publication_identifier":{"issn":["0730-0301"],"eissn":["1557-7368"]},"month":"12","acknowledgement":"We thank the visual computing group at IST Austria for their valuable discussions and feedback. Houdini Education licenses were provided by SideFX software. This project was funded in part by the European Research Council (ERC Consolidator Grant 101045083 CoDiNA).","year":"2022","publisher":"Association for Computing Machinery","department":[{"_id":"ChWo"}],"publication_status":"published","author":[{"full_name":"Ishida, Sadashige","first_name":"Sadashige","last_name":"Ishida","id":"6F7C4B96-A8E9-11E9-A7CA-09ECE5697425"},{"first_name":"Christopher J","last_name":"Wojtan","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6646-5546","full_name":"Wojtan, Christopher J"},{"full_name":"Chern, Albert","first_name":"Albert","last_name":"Chern"}],"volume":41,"date_updated":"2023-08-04T09:37:23Z","date_created":"2023-01-29T23:00:59Z","article_number":"241","file_date_updated":"2023-01-30T07:15:48Z"},{"date_published":"2021-08-01T00:00:00Z","article_type":"original","citation":{"chicago":"Sperl, Georg, Rahul Narain, and Chris Wojtan. “Mechanics-Aware Deformation of Yarn Pattern Geometry.” ACM Transactions on Graphics. 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Using triangle strains to interpolate precomputed yarn geometry, we are able to reproduce effects such as knit loops tightening under stretching. In combination with precomputed mesh animation or real-time mesh simulation, our method is able to animate yarn-level cloth in real-time at large scales.","lang":"eng"}],"type":"journal_article","language":[{"iso":"eng"}],"acknowledged_ssus":[{"_id":"ScienComp"}],"doi":"10.1145/3450626.3459816","project":[{"_id":"2533E772-B435-11E9-9278-68D0E5697425","grant_number":"638176","call_identifier":"H2020","name":"Efficient Simulation of Natural Phenomena at Extremely Large Scales"}],"isi":1,"quality_controlled":"1","external_id":{"isi":["000674930900132"]},"main_file_link":[{"open_access":"1","url":"https://doi.org/10.1145/3450626.3459816"}],"oa":1,"publication_identifier":{"eissn":["15577368"],"issn":["07300301"]},"month":"08","volume":40,"date_updated":"2023-08-10T14:24:36Z","date_created":"2021-08-08T22:01:27Z","related_material":{"link":[{"url":"https://ist.ac.at/en/news/knitting-virtual-yarn/","relation":"press_release","description":"News on IST Webpage"}],"record":[{"id":"12358","status":"public","relation":"dissertation_contains"},{"status":"public","relation":"software","id":"9327"}]},"author":[{"last_name":"Sperl","first_name":"Georg","id":"4DD40360-F248-11E8-B48F-1D18A9856A87","full_name":"Sperl, Georg"},{"first_name":"Rahul","last_name":"Narain","full_name":"Narain, Rahul"},{"full_name":"Wojtan, Christopher J","last_name":"Wojtan","first_name":"Christopher J","orcid":"0000-0001-6646-5546","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87"}],"publisher":"Association for Computing Machinery","department":[{"_id":"GradSch"},{"_id":"ChWo"}],"publication_status":"published","year":"2021","acknowledgement":"We wish to thank the anonymous reviewers and the members of the Visual Computing Group at IST Austria for their valuable feedback. We also thank Seddi Labs for providing the garment model with fold-over seams.\r\nThis research was supported by the Scientific Service Units (SSU) of IST Austria through resources provided by Scientific\r\nComputing. This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 638176. Rahul Narain is supported by a Pankaj Gupta Young Faculty Fellowship and a gift from Adobe Inc.","ec_funded":1,"article_number":"168"},{"has_accepted_license":"1","month":"05","citation":{"short":"G. Sperl, R. Narain, C. Wojtan, (2021).","mla":"Sperl, Georg, et al. Mechanics-Aware Deformation of Yarn Pattern Geometry (Additional Animation/Model Data). 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Skrivan, A. Soderstrom, J. Johansson, C. Sprenger, K. Museth, C. Wojtan, ACM Transactions on Graphics 39 (2020).","chicago":"Skrivan, Tomas, Andreas Soderstrom, John Johansson, Christoph Sprenger, Ken Museth, and Chris Wojtan. “Wave Curves: Simulating Lagrangian Water Waves on Dynamically Deforming Surfaces.” ACM Transactions on Graphics. Association for Computing Machinery, 2020. https://doi.org/10.1145/3386569.3392466.","ama":"Skrivan T, Soderstrom A, Johansson J, Sprenger C, Museth K, Wojtan C. Wave curves: Simulating Lagrangian water waves on dynamically deforming surfaces. ACM Transactions on Graphics. 2020;39(4). doi:10.1145/3386569.3392466","ista":"Skrivan T, Soderstrom A, Johansson J, Sprenger C, Museth K, Wojtan C. 2020. Wave curves: Simulating Lagrangian water waves on dynamically deforming surfaces. ACM Transactions on Graphics. 39(4), 65.","ieee":"T. Skrivan, A. Soderstrom, J. Johansson, C. Sprenger, K. Museth, and C. 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Our method works as a post-processing step which takes a simulation as input and increases its apparent resolution by simulating many detailed Lagrangian water waves on top of it. We extend linear water wave theory to work in non-planar domains which deform over time, and we discretize the theory using Lagrangian wave packets attached to spline curves. The method is numerically stable and trivially parallelizable, and it produces high frequency ripples with dispersive wave-like behaviors customized to the underlying fluid simulation."}],"project":[{"call_identifier":"H2020","name":"Efficient Simulation of Natural Phenomena at Extremely Large Scales","_id":"2533E772-B435-11E9-9278-68D0E5697425","grant_number":"638176"},{"grant_number":"665385","_id":"2564DBCA-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"International IST Doctoral Program"}],"isi":1,"quality_controlled":"1","external_id":{"isi":["000583700300038"]},"oa":1,"language":[{"iso":"eng"}],"acknowledged_ssus":[{"_id":"ScienComp"}],"doi":"10.1145/3386569.3392466","publication_identifier":{"issn":["07300301"],"eissn":["15577368"]},"month":"07","department":[{"_id":"ChWo"}],"publisher":"Association for Computing Machinery","publication_status":"published","acknowledgement":"We wish to thank the anonymous reviewers and the members of the Visual Computing Group at IST Austria for their valuable feedback. This research was supported by the Scientific Service Units (SSU) of IST Austria through resources provided by Scientific Computing. This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 638176 and Marie SkłodowskaCurie Grant Agreement No. 665385.","year":"2020","volume":39,"date_updated":"2023-08-22T09:28:27Z","date_created":"2020-09-20T22:01:37Z","author":[{"last_name":"Skrivan","first_name":"Tomas","id":"486A5A46-F248-11E8-B48F-1D18A9856A87","full_name":"Skrivan, Tomas"},{"last_name":"Soderstrom","first_name":"Andreas","full_name":"Soderstrom, Andreas"},{"full_name":"Johansson, John","first_name":"John","last_name":"Johansson"},{"first_name":"Christoph","last_name":"Sprenger","full_name":"Sprenger, Christoph"},{"full_name":"Museth, Ken","first_name":"Ken","last_name":"Museth"},{"first_name":"Christopher J","last_name":"Wojtan","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6646-5546","full_name":"Wojtan, Christopher J"}],"article_number":"65","ec_funded":1,"file_date_updated":"2020-09-21T07:51:44Z"},{"date_updated":"2023-09-05T16:00:13Z","date_created":"2020-11-17T09:35:10Z","volume":39,"author":[{"full_name":"Schreck, Camille","id":"2B14B676-F248-11E8-B48F-1D18A9856A87","last_name":"Schreck","first_name":"Camille"},{"orcid":"0000-0001-6646-5546","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","last_name":"Wojtan","first_name":"Christopher J","full_name":"Wojtan, Christopher J"}],"publication_status":"published","publisher":"Wiley","department":[{"_id":"ChWo"}],"acknowledgement":"We wish to thank the anonymous reviewers and the members of the Visual Computing Group at IST Austria for their valuable feedback. This research was supported by the Scientific Service Units (SSU) of IST Austria through resources provided by Scientific Computing. We would also like to thank Joseph Teran and Chenfanfu Jiang for the helpful discussions.\r\nThis project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme under grant agreement No. 638176.","year":"2020","file_date_updated":"2020-11-23T09:05:13Z","ec_funded":1,"acknowledged_ssus":[{"_id":"ScienComp"}],"language":[{"iso":"eng"}],"doi":"10.1111/cgf.13914","isi":1,"quality_controlled":"1","project":[{"name":"Efficient Simulation of Natural Phenomena at Extremely Large Scales","call_identifier":"H2020","grant_number":"638176","_id":"2533E772-B435-11E9-9278-68D0E5697425"}],"external_id":{"isi":["000548709600008"]},"oa":1,"month":"05","publication_identifier":{"eissn":["1467-8659"],"issn":["0167-7055"]},"file":[{"checksum":"7605f605acd84d0942b48bc7a1c2d72e","success":1,"date_created":"2020-11-23T09:05:13Z","date_updated":"2020-11-23T09:05:13Z","relation":"main_file","file_id":"8796","file_size":38969122,"content_type":"application/pdf","creator":"dernst","access_level":"open_access","file_name":"2020_poff_revisited.pdf"}],"oa_version":"Submitted Version","title":"A practical method for animating anisotropic elastoplastic materials","status":"public","ddc":["000"],"intvolume":" 39","user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","_id":"8765","abstract":[{"text":"This paper introduces a simple method for simulating highly anisotropic elastoplastic material behaviors like the dissolution of fibrous phenomena (splintering wood, shredding bales of hay) and materials composed of large numbers of irregularly‐shaped bodies (piles of twigs, pencils, or cards). We introduce a simple transformation of the anisotropic problem into an equivalent isotropic one, and we solve this new “fictitious” isotropic problem using an existing simulator based on the material point method. Our approach results in minimal changes to existing simulators, and it allows us to re‐use popular isotropic plasticity models like the Drucker‐Prager yield criterion instead of inventing new anisotropic plasticity models for every phenomenon we wish to simulate.","lang":"eng"}],"issue":"2","type":"journal_article","date_published":"2020-05-01T00:00:00Z","article_type":"original","page":"89-99","publication":"Computer Graphics Forum","citation":{"mla":"Schreck, Camille, and Chris Wojtan. “A Practical Method for Animating Anisotropic Elastoplastic Materials.” Computer Graphics Forum, vol. 39, no. 2, Wiley, 2020, pp. 89–99, doi:10.1111/cgf.13914.","short":"C. Schreck, C. Wojtan, Computer Graphics Forum 39 (2020) 89–99.","chicago":"Schreck, Camille, and Chris Wojtan. “A Practical Method for Animating Anisotropic Elastoplastic Materials.” Computer Graphics Forum. Wiley, 2020. https://doi.org/10.1111/cgf.13914.","ama":"Schreck C, Wojtan C. A practical method for animating anisotropic elastoplastic materials. Computer Graphics Forum. 2020;39(2):89-99. doi:10.1111/cgf.13914","ista":"Schreck C, Wojtan C. 2020. A practical method for animating anisotropic elastoplastic materials. Computer Graphics Forum. 39(2), 89–99.","apa":"Schreck, C., & Wojtan, C. (2020). A practical method for animating anisotropic elastoplastic materials. Computer Graphics Forum. Wiley. https://doi.org/10.1111/cgf.13914","ieee":"C. Schreck and C. Wojtan, “A practical method for animating anisotropic elastoplastic materials,” Computer Graphics Forum, vol. 39, no. 2. Wiley, pp. 89–99, 2020."},"day":"01","article_processing_charge":"No","has_accepted_license":"1","keyword":["Computer Networks and Communications"],"scopus_import":"1"},{"date_published":"2020-06-01T00:00:00Z","citation":{"chicago":"Hikaru, Ibayashi, Chris Wojtan, Nils Thuerey, Takeo Igarashi, and Ryoichi Ando. “Simulating Liquids on Dynamically Warping Grids.” IEEE Transactions on Visualization and Computer Graphics. IEEE, 2020. https://doi.org/10.1109/TVCG.2018.2883628.","mla":"Hikaru, Ibayashi, et al. “Simulating Liquids on Dynamically Warping Grids.” IEEE Transactions on Visualization and Computer Graphics, vol. 26, no. 6, IEEE, 2020, pp. 2288–302, doi:10.1109/TVCG.2018.2883628.","short":"I. Hikaru, C. Wojtan, N. Thuerey, T. Igarashi, R. Ando, IEEE Transactions on Visualization and Computer Graphics 26 (2020) 2288–2302.","ista":"Hikaru I, Wojtan C, Thuerey N, Igarashi T, Ando R. 2020. Simulating liquids on dynamically warping grids. IEEE Transactions on Visualization and Computer Graphics. 26(6), 2288–2302.","ieee":"I. Hikaru, C. Wojtan, N. Thuerey, T. Igarashi, and R. Ando, “Simulating liquids on dynamically warping grids,” IEEE Transactions on Visualization and Computer Graphics, vol. 26, no. 6. IEEE, pp. 2288–2302, 2020.","apa":"Hikaru, I., Wojtan, C., Thuerey, N., Igarashi, T., & Ando, R. (2020). Simulating liquids on dynamically warping grids. IEEE Transactions on Visualization and Computer Graphics. IEEE. https://doi.org/10.1109/TVCG.2018.2883628","ama":"Hikaru I, Wojtan C, Thuerey N, Igarashi T, Ando R. Simulating liquids on dynamically warping grids. IEEE Transactions on Visualization and Computer Graphics. 2020;26(6):2288-2302. doi:10.1109/TVCG.2018.2883628"},"publication":"IEEE Transactions on Visualization and Computer Graphics","page":"2288-2302","article_type":"original","has_accepted_license":"1","article_processing_charge":"No","day":"01","scopus_import":"1","file":[{"content_type":"application/pdf","file_size":21910098,"creator":"wojtan","file_name":"preprint.pdf","access_level":"open_access","date_updated":"2020-10-08T08:34:53Z","date_created":"2020-10-08T08:34:53Z","checksum":"8d4c55443a0ee335bb5bb652de503042","success":1,"relation":"main_file","file_id":"8626"}],"oa_version":"Submitted Version","user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","_id":"5681","intvolume":" 26","title":"Simulating liquids on dynamically warping grids","ddc":["006"],"status":"public","issue":"6","abstract":[{"text":"We introduce dynamically warping grids for adaptive liquid simulation. Our primary contributions are a strategy for dynamically deforming regular grids over the course of a simulation and a method for efficiently utilizing these deforming grids for liquid simulation. Prior work has shown that unstructured grids are very effective for adaptive fluid simulations. However, unstructured grids often lead to complicated implementations and a poor cache hit rate due to inconsistent memory access. Regular grids, on the other hand, provide a fast, fixed memory access pattern and straightforward implementation. Our method combines the advantages of both: we leverage the simplicity of regular grids while still achieving practical and controllable spatial adaptivity. We demonstrate that our method enables adaptive simulations that are fast, flexible, and robust to null-space issues. At the same time, our method is simple to implement and takes advantage of existing highly-tuned algorithms.","lang":"eng"}],"type":"journal_article","doi":"10.1109/TVCG.2018.2883628","language":[{"iso":"eng"}],"acknowledged_ssus":[{"_id":"ScienComp"}],"oa":1,"external_id":{"pmid":["30507534"],"isi":["000532295600014"]},"isi":1,"quality_controlled":"1","publication_identifier":{"issn":["10772626"],"eissn":["19410506"]},"month":"06","author":[{"first_name":"Ibayashi","last_name":"Hikaru","full_name":"Hikaru, Ibayashi"},{"orcid":"0000-0001-6646-5546","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","last_name":"Wojtan","first_name":"Christopher J","full_name":"Wojtan, Christopher J"},{"last_name":"Thuerey","first_name":"Nils","full_name":"Thuerey, Nils"},{"full_name":"Igarashi, Takeo","last_name":"Igarashi","first_name":"Takeo"},{"full_name":"Ando, Ryoichi","last_name":"Ando","first_name":"Ryoichi"}],"volume":26,"date_updated":"2023-09-18T09:30:01Z","date_created":"2018-12-16T22:59:21Z","pmid":1,"acknowledgement":"This work was partially supported by JSPS Grant-in-Aid forYoung Scientists (Start-up) 16H07410, the ERC StartingGrantsrealFlow(StG-2015-637014) andBigSplash(StG-2014-638176). This research was supported by the Scientific Ser-vice Units (SSU) of IST Austria through resources providedby Scientific Computing. We would like to express my grati-tude to Nobuyuki Umetani and Tomas Skrivan for insight-ful discussion.","year":"2020","department":[{"_id":"ChWo"}],"publisher":"IEEE","publication_status":"published","file_date_updated":"2020-10-08T08:34:53Z"},{"issue":"4","abstract":[{"lang":"eng","text":"Previous research on animations of soap bubbles, films, and foams largely focuses on the motion and geometric shape of the bubble surface. These works neglect the evolution of the bubble’s thickness, which is normally responsible for visual phenomena like surface vortices, Newton’s interference patterns, capillary waves, and deformation-dependent rupturing of films in a foam. In this paper, we model these natural phenomena by introducing the film thickness as a reduced degree of freedom in the Navier-Stokes equations and deriving their equations of motion. We discretize the equations on a nonmanifold triangle mesh surface and couple it to an existing bubble solver. In doing so, we also introduce an incompressible fluid solver for 2.5D films and a novel advection algorithm for convecting fields across non-manifold surface junctions. Our simulations enhance state-of-the-art bubble solvers with additional effects caused by convection, rippling, draining, and evaporation of the thin film."}],"type":"journal_article","oa_version":"Submitted Version","file":[{"relation":"main_file","file_id":"8795","checksum":"813831ca91319d794d9748c276b24578","success":1,"date_updated":"2020-11-23T09:03:19Z","date_created":"2020-11-23T09:03:19Z","access_level":"open_access","file_name":"2020_soapfilm_submitted.pdf","file_size":14935529,"content_type":"application/pdf","creator":"dernst"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","_id":"8384","intvolume":" 39","status":"public","title":"A model for soap film dynamics with evolving thickness","ddc":["000"],"has_accepted_license":"1","article_processing_charge":"No","day":"08","scopus_import":"1","date_published":"2020-07-08T00:00:00Z","citation":{"ama":"Ishida S, Synak P, Narita F, Hachisuka T, Wojtan C. A model for soap film dynamics with evolving thickness. ACM Transactions on Graphics. 2020;39(4). doi:10.1145/3386569.3392405","ista":"Ishida S, Synak P, Narita F, Hachisuka T, Wojtan C. 2020. A model for soap film dynamics with evolving thickness. ACM Transactions on Graphics. 39(4), 31.","apa":"Ishida, S., Synak, P., Narita, F., Hachisuka, T., & Wojtan, C. (2020). A model for soap film dynamics with evolving thickness. ACM Transactions on Graphics. Association for Computing Machinery. https://doi.org/10.1145/3386569.3392405","ieee":"S. Ishida, P. Synak, F. Narita, T. Hachisuka, and C. Wojtan, “A model for soap film dynamics with evolving thickness,” ACM Transactions on Graphics, vol. 39, no. 4. Association for Computing Machinery, 2020.","mla":"Ishida, Sadashige, et al. “A Model for Soap Film Dynamics with Evolving Thickness.” ACM Transactions on Graphics, vol. 39, no. 4, 31, Association for Computing Machinery, 2020, doi:10.1145/3386569.3392405.","short":"S. Ishida, P. Synak, F. Narita, T. Hachisuka, C. Wojtan, ACM Transactions on Graphics 39 (2020).","chicago":"Ishida, Sadashige, Peter Synak, Fumiya Narita, Toshiya Hachisuka, and Chris Wojtan. “A Model for Soap Film Dynamics with Evolving Thickness.” ACM Transactions on Graphics. Association for Computing Machinery, 2020. https://doi.org/10.1145/3386569.3392405."},"publication":"ACM Transactions on Graphics","article_type":"original","ec_funded":1,"file_date_updated":"2020-11-23T09:03:19Z","article_number":"31","author":[{"full_name":"Ishida, Sadashige","last_name":"Ishida","first_name":"Sadashige","id":"6F7C4B96-A8E9-11E9-A7CA-09ECE5697425"},{"full_name":"Synak, Peter","id":"331776E2-F248-11E8-B48F-1D18A9856A87","first_name":"Peter","last_name":"Synak"},{"full_name":"Narita, Fumiya","first_name":"Fumiya","last_name":"Narita"},{"full_name":"Hachisuka, Toshiya","first_name":"Toshiya","last_name":"Hachisuka"},{"full_name":"Wojtan, Christopher J","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6646-5546","first_name":"Christopher J","last_name":"Wojtan"}],"volume":39,"date_updated":"2024-02-28T12:57:31Z","date_created":"2020-09-13T22:01:18Z","year":"2020","acknowledgement":"We wish to thank the anonymous reviewers and the members of the Visual Computing Group at IST Austria for their valuable feedback, especially Camille Schreck for her help in rendering. This research was supported by the Scientific Service Units (SSU) of IST Austria through resources provided by Scientific Computing. We would like to thank the authors of [Belcour and Barla 2017] for providing their implementation, the authors of [Atkins and Elliott 2010] and [Seychelles et al. 2008] for allowing us to use their results, and Rok Grah for helpful discussions. Finally, we thank Ryoichi Ando for many discussions from the beginning of the project that resulted in important contents of the paper including our formulation, numerical scheme, and initial implementation. This project has received funding from the\r\nEuropean Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 638176.","publisher":"Association for Computing Machinery","department":[{"_id":"ChWo"}],"publication_status":"published","publication_identifier":{"eissn":["15577368"],"issn":["07300301"]},"month":"07","doi":"10.1145/3386569.3392405","language":[{"iso":"eng"}],"acknowledged_ssus":[{"_id":"ScienComp"}],"main_file_link":[{"open_access":"1","url":"https://doi.org/10.1145/3386569.3392405"}],"oa":1,"external_id":{"isi":["000583700300004"]},"project":[{"_id":"2533E772-B435-11E9-9278-68D0E5697425","grant_number":"638176","call_identifier":"H2020","name":"Efficient Simulation of Natural Phenomena at Extremely Large Scales"}],"isi":1,"quality_controlled":"1"},{"acknowledgement":"We wish to thank the anonymous reviewers and the members of the Visual Computing Group at IST Austria for their valuable feedback. We also thank the creators of the Berkeley Garment Library [de Joya et al. 2012] for providing garment meshes, [Krishnamurthy and Levoy 1996] and [Turk and Levoy 1994] for the armadillo and bunny meshes, the creators of libWetCloth [Fei et al. 2018] for their implementation of discrete elastic rod forces, and Tomáš Skřivan for\r\ninspiring discussions and help with Mathematica code generation. This research was supported by the Scientific Service Units (SSU) of IST Austria through resources provided by Scientific Computing. This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 638176. Rahul Narain is supported by a Pankaj Gupta Young Faculty Fellowship and a gift from Adobe Inc.","year":"2020","publication_status":"published","publisher":"Association for Computing Machinery","department":[{"_id":"ChWo"}],"author":[{"full_name":"Sperl, Georg","last_name":"Sperl","first_name":"Georg","id":"4DD40360-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Narain","first_name":"Rahul","full_name":"Narain, Rahul"},{"full_name":"Wojtan, Christopher J","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6646-5546","first_name":"Christopher J","last_name":"Wojtan"}],"related_material":{"record":[{"id":"12358","relation":"dissertation_contains","status":"public"}]},"date_created":"2020-09-13T22:01:18Z","date_updated":"2024-02-28T12:57:47Z","volume":39,"article_number":"48","file_date_updated":"2020-11-23T09:01:22Z","ec_funded":1,"main_file_link":[{"open_access":"1","url":"https://doi.org/10.1145/3386569.3392412"}],"oa":1,"external_id":{"isi":["000583700300021"]},"isi":1,"quality_controlled":"1","project":[{"grant_number":"638176","_id":"2533E772-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"Efficient Simulation of Natural Phenomena at Extremely Large Scales"}],"doi":"10.1145/3386569.3392412","acknowledged_ssus":[{"_id":"ScienComp"}],"language":[{"iso":"eng"}],"month":"07","publication_identifier":{"eissn":["15577368"],"issn":["07300301"]},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","_id":"8385","title":"Homogenized yarn-level cloth","status":"public","ddc":["000"],"intvolume":" 39","file":[{"file_name":"2020_hylc_submitted.pdf","access_level":"open_access","creator":"dernst","content_type":"application/pdf","file_size":38922662,"file_id":"8794","relation":"main_file","date_created":"2020-11-23T09:01:22Z","date_updated":"2020-11-23T09:01:22Z","success":1,"checksum":"cf4c1d361c3196c4bd424520a5588205"}],"oa_version":"Submitted Version","type":"journal_article","abstract":[{"lang":"eng","text":"We present a method for animating yarn-level cloth effects using a thin-shell solver. We accomplish this through numerical homogenization: we first use a large number of yarn-level simulations to build a model of the potential energy density of the cloth, and then use this energy density function to compute forces in a thin shell simulator. We model several yarn-based materials, including both woven and knitted fabrics. Our model faithfully reproduces expected effects like the stiffness of woven fabrics, and the highly deformable nature and anisotropy of knitted fabrics. Our approach does not require any real-world experiments nor measurements; because the method is based entirely on simulations, it can generate entirely new material models quickly, without the need for testing apparatuses or human intervention. We provide data-driven models of several woven and knitted fabrics, which can be used for efficient simulation with an off-the-shelf cloth solver."}],"issue":"4","publication":"ACM Transactions on Graphics","citation":{"chicago":"Sperl, Georg, Rahul Narain, and Chris Wojtan. “Homogenized Yarn-Level Cloth.” ACM Transactions on Graphics. Association for Computing Machinery, 2020. https://doi.org/10.1145/3386569.3392412.","short":"G. Sperl, R. Narain, C. Wojtan, ACM Transactions on Graphics 39 (2020).","mla":"Sperl, Georg, et al. “Homogenized Yarn-Level Cloth.” ACM Transactions on Graphics, vol. 39, no. 4, 48, Association for Computing Machinery, 2020, doi:10.1145/3386569.3392412.","ieee":"G. Sperl, R. Narain, and C. Wojtan, “Homogenized yarn-level cloth,” ACM Transactions on Graphics, vol. 39, no. 4. Association for Computing Machinery, 2020.","apa":"Sperl, G., Narain, R., & Wojtan, C. (2020). Homogenized yarn-level cloth. ACM Transactions on Graphics. Association for Computing Machinery. https://doi.org/10.1145/3386569.3392412","ista":"Sperl G, Narain R, Wojtan C. 2020. Homogenized yarn-level cloth. ACM Transactions on Graphics. 39(4), 48.","ama":"Sperl G, Narain R, Wojtan C. Homogenized yarn-level cloth. ACM Transactions on Graphics. 2020;39(4). doi:10.1145/3386569.3392412"},"article_type":"original","date_published":"2020-07-08T00:00:00Z","scopus_import":"1","day":"08","has_accepted_license":"1","article_processing_charge":"No"},{"date_created":"2020-11-17T10:47:48Z","date_updated":"2024-02-28T13:58:11Z","volume":39,"author":[{"full_name":"Jeschke, Stefan","id":"44D6411A-F248-11E8-B48F-1D18A9856A87","last_name":"Jeschke","first_name":"Stefan"},{"full_name":"Hafner, Christian","first_name":"Christian","last_name":"Hafner","id":"400429CC-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Nuttapong","last_name":"Chentanez","full_name":"Chentanez, Nuttapong"},{"full_name":"Macklin, Miles","last_name":"Macklin","first_name":"Miles"},{"last_name":"Müller-Fischer","first_name":"Matthias","full_name":"Müller-Fischer, Matthias"},{"full_name":"Wojtan, Christopher J","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6646-5546","first_name":"Christopher J","last_name":"Wojtan"}],"publication_status":"published","publisher":"Wiley","department":[{"_id":"ChWo"},{"_id":"BeBi"}],"year":"2020","ec_funded":1,"language":[{"iso":"eng"}],"conference":{"end_date":"2020-10-09","location":"Online Symposium","start_date":"2020-10-06","name":"SCA: Symposium on Computer Animation"},"doi":"10.1111/cgf.14100","isi":1,"quality_controlled":"1","project":[{"name":"Efficient Simulation of Natural Phenomena at Extremely Large Scales","call_identifier":"H2020","grant_number":"638176","_id":"2533E772-B435-11E9-9278-68D0E5697425"},{"_id":"24F9549A-B435-11E9-9278-68D0E5697425","grant_number":"715767","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling","call_identifier":"H2020"}],"external_id":{"isi":["000591780400005"]},"month":"12","oa_version":"None","title":"Making procedural water waves boundary-aware","status":"public","intvolume":" 39","user_id":"2EBD1598-F248-11E8-B48F-1D18A9856A87","_id":"8766","abstract":[{"lang":"eng","text":"The “procedural” approach to animating ocean waves is the dominant algorithm for animating larger bodies of water in\r\ninteractive applications as well as in off-line productions — it provides high visual quality with a low computational demand. In this paper, we widen the applicability of procedural water wave animation with an extension that guarantees the satisfaction of boundary conditions imposed by terrain while still approximating physical wave behavior. In combination with a particle system that models wave breaking, foam, and spray, this allows us to naturally model waves interacting with beaches and rocks. Our system is able to animate waves at large scales at interactive frame rates on a commodity PC."}],"issue":"8","type":"journal_article","date_published":"2020-12-01T00:00:00Z","article_type":"original","page":"47-54","publication":"Computer Graphics forum","citation":{"short":"S. Jeschke, C. Hafner, N. Chentanez, M. Macklin, M. Müller-Fischer, C. Wojtan, Computer Graphics Forum 39 (2020) 47–54.","mla":"Jeschke, Stefan, et al. “Making Procedural Water Waves Boundary-Aware.” Computer Graphics Forum, vol. 39, no. 8, Wiley, 2020, pp. 47–54, doi:10.1111/cgf.14100.","chicago":"Jeschke, Stefan, Christian Hafner, Nuttapong Chentanez, Miles Macklin, Matthias Müller-Fischer, and Chris Wojtan. “Making Procedural Water Waves Boundary-Aware.” Computer Graphics Forum. Wiley, 2020. https://doi.org/10.1111/cgf.14100.","ama":"Jeschke S, Hafner C, Chentanez N, Macklin M, Müller-Fischer M, Wojtan C. Making procedural water waves boundary-aware. Computer Graphics forum. 2020;39(8):47-54. doi:10.1111/cgf.14100","ieee":"S. Jeschke, C. Hafner, N. Chentanez, M. Macklin, M. Müller-Fischer, and C. Wojtan, “Making procedural water waves boundary-aware,” Computer Graphics forum, vol. 39, no. 8. Wiley, pp. 47–54, 2020.","apa":"Jeschke, S., Hafner, C., Chentanez, N., Macklin, M., Müller-Fischer, M., & Wojtan, C. (2020). Making procedural water waves boundary-aware. Computer Graphics Forum. Online Symposium: Wiley. https://doi.org/10.1111/cgf.14100","ista":"Jeschke S, Hafner C, Chentanez N, Macklin M, Müller-Fischer M, Wojtan C. 2020. Making procedural water waves boundary-aware. Computer Graphics forum. 39(8), 47–54."},"day":"01","article_processing_charge":"No","scopus_import":"1"},{"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","_id":"6442","intvolume":" 38","title":"Fundamental solutions for water wave animation","ddc":["000","005"],"status":"public","file":[{"access_level":"open_access","file_name":"2019_ACM_Schreck.pdf","creator":"dernst","file_size":44328918,"content_type":"application/pdf","file_id":"6443","relation":"main_file","checksum":"1b737dfe3e051aba8f3f4ab1dceda673","date_updated":"2020-07-14T12:47:30Z","date_created":"2019-05-14T07:03:55Z"}],"oa_version":"Submitted Version","type":"journal_article","issue":"4","abstract":[{"text":"This paper investigates the use of fundamental solutions for animating detailed linear water surface waves. We first propose an analytical solution for efficiently animating circular ripples in closed form. We then show how to adapt the method of fundamental solutions (MFS) to create ambient waves interacting with complex obstacles. Subsequently, we present a novel wavelet-based discretization which outperforms the state of the art MFS approach for simulating time-varying water surface waves with moving obstacles. Our results feature high-resolution spatial details, interactions with complex boundaries, and large open ocean domains. Our method compares favorably with previous work as well as known analytical solutions. We also present comparisons between our method and real world examples.","lang":"eng"}],"citation":{"ama":"Schreck C, Hafner C, Wojtan C. Fundamental solutions for water wave animation. ACM Transactions on Graphics. 2019;38(4). doi:10.1145/3306346.3323002","apa":"Schreck, C., Hafner, C., & Wojtan, C. (2019). Fundamental solutions for water wave animation. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/3306346.3323002","ieee":"C. Schreck, C. Hafner, and C. Wojtan, “Fundamental solutions for water wave animation,” ACM Transactions on Graphics, vol. 38, no. 4. ACM, 2019.","ista":"Schreck C, Hafner C, Wojtan C. 2019. Fundamental solutions for water wave animation. ACM Transactions on Graphics. 38(4), 130.","short":"C. Schreck, C. Hafner, C. Wojtan, ACM Transactions on Graphics 38 (2019).","mla":"Schreck, Camille, et al. “Fundamental Solutions for Water Wave Animation.” ACM Transactions on Graphics, vol. 38, no. 4, 130, ACM, 2019, doi:10.1145/3306346.3323002.","chicago":"Schreck, Camille, Christian Hafner, and Chris Wojtan. “Fundamental Solutions for Water Wave Animation.” ACM Transactions on Graphics. ACM, 2019. https://doi.org/10.1145/3306346.3323002."},"publication":"ACM Transactions on Graphics","date_published":"2019-07-01T00:00:00Z","scopus_import":"1","article_processing_charge":"No","has_accepted_license":"1","day":"01","year":"2019","publisher":"ACM","department":[{"_id":"ChWo"}],"publication_status":"published","related_material":{"link":[{"relation":"press_release","description":"News on IST Homepage","url":"https://ist.ac.at/en/news/new-method-makes-realistic-water-wave-animations-more-efficient/"}]},"author":[{"last_name":"Schreck","first_name":"Camille","id":"2B14B676-F248-11E8-B48F-1D18A9856A87","full_name":"Schreck, Camille"},{"last_name":"Hafner","first_name":"Christian","id":"400429CC-F248-11E8-B48F-1D18A9856A87","full_name":"Hafner, Christian"},{"full_name":"Wojtan, Christopher J","last_name":"Wojtan","first_name":"Christopher J","orcid":"0000-0001-6646-5546","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87"}],"volume":38,"date_created":"2019-05-14T07:04:06Z","date_updated":"2023-08-25T10:18:46Z","article_number":"130","ec_funded":1,"file_date_updated":"2020-07-14T12:47:30Z","oa":1,"external_id":{"isi":["000475740600104"]},"project":[{"call_identifier":"H2020","name":"Efficient Simulation of Natural Phenomena at Extremely Large Scales","_id":"2533E772-B435-11E9-9278-68D0E5697425","grant_number":"638176"},{"call_identifier":"H2020","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling","grant_number":"715767","_id":"24F9549A-B435-11E9-9278-68D0E5697425"},{"grant_number":"665385","_id":"2564DBCA-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"International IST Doctoral Program"}],"quality_controlled":"1","isi":1,"doi":"10.1145/3306346.3323002","language":[{"iso":"eng"}],"acknowledged_ssus":[{"_id":"ScienComp"}],"month":"07"},{"ddc":["006"],"title":"Extended narrow band FLIP for liquid simulations","status":"public","intvolume":" 37","_id":"135","user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","file":[{"success":1,"checksum":"8edb90da8a72395eb5d970580e0925b6","date_created":"2020-10-08T08:38:23Z","date_updated":"2020-10-08T08:38:23Z","file_id":"8627","relation":"main_file","creator":"wojtan","file_size":54309947,"content_type":"application/pdf","access_level":"open_access","file_name":"exnbflip.pdf"}],"oa_version":"Submitted Version","alternative_title":["Eurographics"],"type":"journal_article","abstract":[{"lang":"eng","text":"The Fluid Implicit Particle method (FLIP) reduces numerical dissipation by combining particles with grids. To improve performance, the subsequent narrow band FLIP method (NB‐FLIP) uses a FLIP‐based fluid simulation only near the liquid surface and a traditional grid‐based fluid simulation away from the surface. This spatially‐limited FLIP simulation significantly reduces the number of particles and alleviates a computational bottleneck. In this paper, we extend the NB‐FLIP idea even further, by allowing a simulation to transition between a FLIP‐like fluid simulation and a grid‐based simulation in arbitrary locations, not just near the surface. This approach leads to even more savings in memory and computation, because we can concentrate the particles only in areas where they are needed. More importantly, this new method allows us to seamlessly transition to smooth implicit surface geometry wherever the particle‐based simulation is unnecessary. Consequently, our method leads to a practical algorithm for avoiding the noisy surface artifacts associated with particle‐based liquid simulations, while simultaneously maintaining the benefits of a FLIP simulation in regions of dynamic motion."}],"issue":"2","article_type":"original","page":"169 - 177","publication":"Computer Graphics Forum","citation":{"ama":"Sato T, Wojtan C, Thuerey N, Igarashi T, Ando R. Extended narrow band FLIP for liquid simulations. Computer Graphics Forum. 2018;37(2):169-177. doi:10.1111/cgf.13351","ista":"Sato T, Wojtan C, Thuerey N, Igarashi T, Ando R. 2018. Extended narrow band FLIP for liquid simulations. Computer Graphics Forum. 37(2), 169–177.","ieee":"T. Sato, C. Wojtan, N. Thuerey, T. Igarashi, and R. Ando, “Extended narrow band FLIP for liquid simulations,” Computer Graphics Forum, vol. 37, no. 2. Wiley, pp. 169–177, 2018.","apa":"Sato, T., Wojtan, C., Thuerey, N., Igarashi, T., & Ando, R. (2018). Extended narrow band FLIP for liquid simulations. Computer Graphics Forum. Wiley. https://doi.org/10.1111/cgf.13351","mla":"Sato, Takahiro, et al. “Extended Narrow Band FLIP for Liquid Simulations.” Computer Graphics Forum, vol. 37, no. 2, Wiley, 2018, pp. 169–77, doi:10.1111/cgf.13351.","short":"T. Sato, C. Wojtan, N. Thuerey, T. Igarashi, R. Ando, Computer Graphics Forum 37 (2018) 169–177.","chicago":"Sato, Takahiro, Chris Wojtan, Nils Thuerey, Takeo Igarashi, and Ryoichi Ando. “Extended Narrow Band FLIP for Liquid Simulations.” Computer Graphics Forum. Wiley, 2018. https://doi.org/10.1111/cgf.13351."},"date_published":"2018-05-22T00:00:00Z","scopus_import":"1","day":"22","has_accepted_license":"1","article_processing_charge":"No","publication_status":"published","publisher":"Wiley","department":[{"_id":"ChWo"}],"year":"2018","date_updated":"2023-09-11T14:00:26Z","date_created":"2018-12-11T11:44:49Z","volume":37,"author":[{"full_name":"Sato, Takahiro","last_name":"Sato","first_name":"Takahiro"},{"full_name":"Wojtan, Christopher J","orcid":"0000-0001-6646-5546","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","last_name":"Wojtan","first_name":"Christopher J"},{"full_name":"Thuerey, Nils","first_name":"Nils","last_name":"Thuerey"},{"first_name":"Takeo","last_name":"Igarashi","full_name":"Igarashi, Takeo"},{"first_name":"Ryoichi","last_name":"Ando","full_name":"Ando, Ryoichi"}],"file_date_updated":"2020-10-08T08:38:23Z","ec_funded":1,"isi":1,"quality_controlled":"1","project":[{"grant_number":"638176","_id":"2533E772-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"Efficient Simulation of Natural Phenomena at Extremely Large Scales"}],"external_id":{"isi":["000434085600016"]},"oa":1,"language":[{"iso":"eng"}],"doi":"10.1111/cgf.13351","month":"05","publication_identifier":{"issn":["0167-7055"]}},{"oa_version":"Published Version","file":[{"relation":"main_file","file_id":"5744","checksum":"db75ebabe2ec432bf41389e614d6ef62","date_updated":"2020-07-14T12:44:45Z","date_created":"2018-12-18T09:59:23Z","access_level":"open_access","file_name":"2018_ACM_Jeschke.pdf","file_size":22185016,"content_type":"application/pdf","creator":"dernst"}],"ddc":["000"],"status":"public","title":"Water surface wavelets","intvolume":" 37","user_id":"2EBD1598-F248-11E8-B48F-1D18A9856A87","_id":"134","abstract":[{"text":"The current state of the art in real-time two-dimensional water wave simulation requires developers to choose between efficient Fourier-based methods, which lack interactions with moving obstacles, and finite-difference or finite element methods, which handle environmental interactions but are significantly more expensive. This paper attempts to bridge this long-standing gap between complexity and performance, by proposing a new wave simulation method that can faithfully simulate wave interactions with moving obstacles in real time while simultaneously preserving minute details and accommodating very large simulation domains.\r\n\r\nPrevious methods for simulating 2D water waves directly compute the change in height of the water surface, a strategy which imposes limitations based on the CFL condition (fast moving waves require small time steps) and Nyquist's limit (small wave details require closely-spaced simulation variables). This paper proposes a novel wavelet transformation that discretizes the liquid motion in terms of amplitude-like functions that vary over space, frequency, and direction, effectively generalizing Fourier-based methods to handle local interactions. Because these new variables change much more slowly over space than the original water height function, our change of variables drastically reduces the limitations of the CFL condition and Nyquist limit, allowing us to simulate highly detailed water waves at very large visual resolutions. Our discretization is amenable to fast summation and easy to parallelize. We also present basic extensions like pre-computed wave paths and two-way solid fluid coupling. Finally, we argue that our discretization provides a convenient set of variables for artistic manipulation, which we illustrate with a novel wave-painting interface.","lang":"eng"}],"issue":"4","alternative_title":["SIGGRAPH"],"type":"journal_article","date_published":"2018-07-30T00:00:00Z","publication":"ACM Transactions on Graphics","citation":{"ama":"Jeschke S, Skrivan T, Mueller Fischer M, Chentanez N, Macklin M, Wojtan C. Water surface wavelets. ACM Transactions on Graphics. 2018;37(4). doi:10.1145/3197517.3201336","ieee":"S. Jeschke, T. Skrivan, M. Mueller Fischer, N. Chentanez, M. Macklin, and C. Wojtan, “Water surface wavelets,” ACM Transactions on Graphics, vol. 37, no. 4. ACM, 2018.","apa":"Jeschke, S., Skrivan, T., Mueller Fischer, M., Chentanez, N., Macklin, M., & Wojtan, C. (2018). Water surface wavelets. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/3197517.3201336","ista":"Jeschke S, Skrivan T, Mueller Fischer M, Chentanez N, Macklin M, Wojtan C. 2018. Water surface wavelets. ACM Transactions on Graphics. 37(4), 94.","short":"S. Jeschke, T. Skrivan, M. Mueller Fischer, N. Chentanez, M. Macklin, C. Wojtan, ACM Transactions on Graphics 37 (2018).","mla":"Jeschke, Stefan, et al. “Water Surface Wavelets.” ACM Transactions on Graphics, vol. 37, no. 4, 94, ACM, 2018, doi:10.1145/3197517.3201336.","chicago":"Jeschke, Stefan, Tomas Skrivan, Matthias Mueller Fischer, Nuttapong Chentanez, Miles Macklin, and Chris Wojtan. “Water Surface Wavelets.” ACM Transactions on Graphics. ACM, 2018. https://doi.org/10.1145/3197517.3201336."},"day":"30","has_accepted_license":"1","article_processing_charge":"No","scopus_import":"1","date_updated":"2024-02-28T13:58:51Z","date_created":"2018-12-11T11:44:48Z","volume":37,"author":[{"full_name":"Jeschke, Stefan","id":"44D6411A-F248-11E8-B48F-1D18A9856A87","first_name":"Stefan","last_name":"Jeschke"},{"full_name":"Skrivan, Tomas","last_name":"Skrivan","first_name":"Tomas","id":"486A5A46-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Mueller Fischer, Matthias","first_name":"Matthias","last_name":"Mueller Fischer"},{"full_name":"Chentanez, Nuttapong","last_name":"Chentanez","first_name":"Nuttapong"},{"first_name":"Miles","last_name":"Macklin","full_name":"Macklin, Miles"},{"full_name":"Wojtan, Christopher J","last_name":"Wojtan","first_name":"Christopher J","orcid":"0000-0001-6646-5546","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87"}],"related_material":{"link":[{"url":"https://ist.ac.at/en/news/new-water-simulation-captures-small-details-even-in-large-scenes/","relation":"press_release","description":"News on IST Homepage"}]},"publication_status":"published","department":[{"_id":"ChWo"}],"publisher":"ACM","year":"2018","file_date_updated":"2020-07-14T12:44:45Z","ec_funded":1,"publist_id":"7789","article_number":"94","acknowledged_ssus":[{"_id":"ScienComp"}],"language":[{"iso":"eng"}],"doi":"10.1145/3197517.3201336","isi":1,"quality_controlled":"1","project":[{"_id":"2533E772-B435-11E9-9278-68D0E5697425","grant_number":"638176","name":"Efficient Simulation of Natural Phenomena at Extremely Large Scales","call_identifier":"H2020"},{"grant_number":"665385","_id":"2564DBCA-B435-11E9-9278-68D0E5697425","name":"International IST Doctoral Program","call_identifier":"H2020"}],"oa":1,"tmp":{"name":"Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","legal_code_url":"https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode","image":"/images/cc_by_nc_sa.png","short":"CC BY-NC-SA (4.0)"},"external_id":{"isi":["000448185000055"]},"month":"07"},{"type":"journal_article","abstract":[{"lang":"eng","text":"This paper presents a method for simulating water surface waves as a displacement field on a 2D domain. Our method relies on Lagrangian particles that carry packets of water wave energy; each packet carries information about an entire group of wave trains, as opposed to only a single wave crest. Our approach is unconditionally stable and can simulate high resolution geometric details. This approach also presents a straightforward interface for artistic control, because it is essentially a particle system with intuitive parameters like wavelength and amplitude. Our implementation parallelizes well and runs in real time for moderately challenging scenarios."}],"issue":"4","ddc":["006"],"status":"public","title":"Water wave packets","intvolume":" 36","_id":"470","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","file":[{"access_level":"open_access","file_name":"wavepackets_final.pdf","content_type":"application/pdf","file_size":13131683,"creator":"wojtan","relation":"main_file","file_id":"7359","checksum":"82a3b2bfeee4ddef16ecc21675d1a48a","date_updated":"2020-07-14T12:46:34Z","date_created":"2020-01-24T09:32:35Z"}],"oa_version":"Published Version","scopus_import":1,"day":"01","article_processing_charge":"Yes (in subscription journal)","has_accepted_license":"1","article_type":"original","publication":"ACM Transactions on Graphics","citation":{"mla":"Jeschke, Stefan, and Chris Wojtan. “Water Wave Packets.” ACM Transactions on Graphics, vol. 36, no. 4, 103, ACM, 2017, doi:10.1145/3072959.3073678.","short":"S. Jeschke, C. Wojtan, ACM Transactions on Graphics 36 (2017).","chicago":"Jeschke, Stefan, and Chris Wojtan. “Water Wave Packets.” ACM Transactions on Graphics. ACM, 2017. https://doi.org/10.1145/3072959.3073678.","ama":"Jeschke S, Wojtan C. Water wave packets. ACM Transactions on Graphics. 2017;36(4). doi:10.1145/3072959.3073678","ista":"Jeschke S, Wojtan C. 2017. Water wave packets. ACM Transactions on Graphics. 36(4), 103.","apa":"Jeschke, S., & Wojtan, C. (2017). Water wave packets. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/3072959.3073678","ieee":"S. Jeschke and C. Wojtan, “Water wave packets,” ACM Transactions on Graphics, vol. 36, no. 4. ACM, 2017."},"date_published":"2017-07-01T00:00:00Z","article_number":"103","file_date_updated":"2020-07-14T12:46:34Z","ec_funded":1,"publist_id":"7350","publication_status":"published","department":[{"_id":"ChWo"}],"publisher":"ACM","year":"2017","date_created":"2018-12-11T11:46:39Z","date_updated":"2023-02-23T12:20:26Z","volume":36,"author":[{"last_name":"Jeschke","first_name":"Stefan","id":"44D6411A-F248-11E8-B48F-1D18A9856A87","full_name":"Jeschke, Stefan"},{"full_name":"Wojtan, Christopher J","last_name":"Wojtan","first_name":"Christopher J","orcid":"0000-0001-6646-5546","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87"}],"month":"07","publication_identifier":{"issn":["07300301"]},"quality_controlled":"1","project":[{"_id":"2533E772-B435-11E9-9278-68D0E5697425","grant_number":"638176","call_identifier":"H2020","name":"Efficient Simulation of Natural Phenomena at Extremely Large Scales"}],"oa":1,"acknowledged_ssus":[{"_id":"ScienComp"}],"language":[{"iso":"eng"}],"doi":"10.1145/3072959.3073678"},{"scopus_import":"1","article_processing_charge":"No","has_accepted_license":"1","day":"01","citation":{"chicago":"Manteaux, Pierre, Chris Wojtan, Rahul Narain, Stéphane Redon, François Faure, and Marie Cani. “Adaptive Physically Based Models in Computer Graphics.” Computer Graphics Forum. Wiley-Blackwell, 2017. https://doi.org/10.1111/cgf.12941.","mla":"Manteaux, Pierre, et al. “Adaptive Physically Based Models in Computer Graphics.” Computer Graphics Forum, vol. 36, no. 6, Wiley-Blackwell, 2017, pp. 312–37, doi:10.1111/cgf.12941.","short":"P. Manteaux, C. Wojtan, R. Narain, S. Redon, F. Faure, M. Cani, Computer Graphics Forum 36 (2017) 312–337.","ista":"Manteaux P, Wojtan C, Narain R, Redon S, Faure F, Cani M. 2017. Adaptive physically based models in computer graphics. Computer Graphics Forum. 36(6), 312–337.","apa":"Manteaux, P., Wojtan, C., Narain, R., Redon, S., Faure, F., & Cani, M. (2017). Adaptive physically based models in computer graphics. Computer Graphics Forum. Wiley-Blackwell. https://doi.org/10.1111/cgf.12941","ieee":"P. Manteaux, C. Wojtan, R. Narain, S. Redon, F. Faure, and M. Cani, “Adaptive physically based models in computer graphics,” Computer Graphics Forum, vol. 36, no. 6. Wiley-Blackwell, pp. 312–337, 2017.","ama":"Manteaux P, Wojtan C, Narain R, Redon S, Faure F, Cani M. Adaptive physically based models in computer graphics. Computer Graphics Forum. 2017;36(6):312-337. doi:10.1111/cgf.12941"},"publication":"Computer Graphics Forum","page":"312 - 337","date_published":"2017-09-01T00:00:00Z","type":"journal_article","issue":"6","abstract":[{"text":"One of the major challenges in physically based modelling is making simulations efficient. Adaptive models provide an essential solution to these efficiency goals. These models are able to self-adapt in space and time, attempting to provide the best possible compromise between accuracy and speed. This survey reviews the adaptive solutions proposed so far in computer graphics. Models are classified according to the strategy they use for adaptation, from time-stepping and freezing techniques to geometric adaptivity in the form of structured grids, meshes and particles. Applications range from fluids, through deformable bodies, to articulated solids.","lang":"eng"}],"user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","_id":"1367","intvolume":" 36","title":"Adaptive physically based models in computer graphics","ddc":["000"],"status":"public","pubrep_id":"634","file":[{"file_size":1434439,"content_type":"application/pdf","creator":"system","access_level":"open_access","file_name":"IST-2016-634-v1+1_starAdaptivity-cgf.pdf","checksum":"7676e9a9ead6d58c3000988c97deb2ef","date_created":"2018-12-12T10:16:21Z","date_updated":"2020-07-14T12:44:47Z","relation":"main_file","file_id":"5208"}],"oa_version":"Submitted Version","publication_identifier":{"issn":["01677055"]},"month":"09","oa":1,"external_id":{"isi":["000408634200019"]},"quality_controlled":"1","isi":1,"doi":"10.1111/cgf.12941","language":[{"iso":"eng"}],"publist_id":"5873","file_date_updated":"2020-07-14T12:44:47Z","acknowledgement":"This work was partly supported by the starting grants ADAPT and BigSplash, as well as the advanced grant EXPRESSIVE from the European Research Council (ERC-2012-StG_20111012, ERC-2014-StG_638176 and ERC-2011-ADG_20110209).","year":"2017","department":[{"_id":"ChWo"}],"publisher":"Wiley-Blackwell","publication_status":"published","author":[{"full_name":"Manteaux, Pierre","first_name":"Pierre","last_name":"Manteaux"},{"full_name":"Wojtan, Christopher J","first_name":"Christopher J","last_name":"Wojtan","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6646-5546"},{"full_name":"Narain, Rahul","first_name":"Rahul","last_name":"Narain"},{"full_name":"Redon, Stéphane","last_name":"Redon","first_name":"Stéphane"},{"full_name":"Faure, François","first_name":"François","last_name":"Faure"},{"full_name":"Cani, Marie","last_name":"Cani","first_name":"Marie"}],"volume":36,"date_updated":"2023-09-20T11:05:36Z","date_created":"2018-12-11T11:51:37Z"},{"scopus_import":"1","day":"10","has_accepted_license":"1","article_processing_charge":"No","publication":"Proceedings of the 9th International Conference on Motion in Games ","citation":{"ama":"Manteaux P, Vimont U, Wojtan C, Rohmer D, Cani M. Space-time sculpting of liquid animation. In: Proceedings of the 9th International Conference on Motion in Games . ACM; 2016. doi:10.1145/2994258.2994261","apa":"Manteaux, P., Vimont, U., Wojtan, C., Rohmer, D., & Cani, M. (2016). Space-time sculpting of liquid animation. In Proceedings of the 9th International Conference on Motion in Games . San Francisco, CA, USA: ACM. https://doi.org/10.1145/2994258.2994261","ieee":"P. Manteaux, U. Vimont, C. Wojtan, D. Rohmer, and M. Cani, “Space-time sculpting of liquid animation,” in Proceedings of the 9th International Conference on Motion in Games , San Francisco, CA, USA, 2016.","ista":"Manteaux P, Vimont U, Wojtan C, Rohmer D, Cani M. 2016. Space-time sculpting of liquid animation. Proceedings of the 9th International Conference on Motion in Games . MIG: Motion in Games, 2994261.","short":"P. Manteaux, U. Vimont, C. Wojtan, D. Rohmer, M. Cani, in:, Proceedings of the 9th International Conference on Motion in Games , ACM, 2016.","mla":"Manteaux, Pierre, et al. “Space-Time Sculpting of Liquid Animation.” Proceedings of the 9th International Conference on Motion in Games , 2994261, ACM, 2016, doi:10.1145/2994258.2994261.","chicago":"Manteaux, Pierre, Ulysse Vimont, Chris Wojtan, Damien Rohmer, and Marie Cani. “Space-Time Sculpting of Liquid Animation.” In Proceedings of the 9th International Conference on Motion in Games . ACM, 2016. https://doi.org/10.1145/2994258.2994261."},"date_published":"2016-10-10T00:00:00Z","type":"conference","abstract":[{"lang":"eng","text":"We propose an interactive sculpting system for seamlessly editing pre-computed animations of liquid, without the need for any resimulation. The input is a sequence of meshes without correspondences representing the liquid surface over time. Our method enables the efficient selection of consistent space-time parts of this animation, such as moving waves or droplets, which we call space-time features. Once selected, a feature can be copied, edited, or duplicated and then pasted back anywhere in space and time in the same or in another liquid animation sequence. Our method circumvents tedious user interactions by automatically computing the spatial and temporal ranges of the selected feature. We also provide space-time shape editing tools for non-uniform scaling, rotation, trajectory changes, and temporal editing to locally speed up or slow down motion. Using our tools, the user can edit and progressively refine any input simulation result, possibly using a library of precomputed space-time features extracted from other animations. In contrast to the trial-and-error loop usually required to edit animation results through the tuning of indirect simulation parameters, our method gives the user full control over the edited space-time behaviors. © 2016 Copyright held by the owner/author(s)."}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","_id":"1136","ddc":["004"],"status":"public","title":"Space-time sculpting of liquid animation","oa_version":"Submitted Version","month":"10","main_file_link":[{"open_access":"1","url":"https://hal.inria.fr/hal-01367181"}],"oa":1,"quality_controlled":"1","project":[{"name":"Efficient Simulation of Natural Phenomena at Extremely Large Scales","call_identifier":"H2020","grant_number":"638176","_id":"2533E772-B435-11E9-9278-68D0E5697425"}],"conference":{"end_date":"2016-10-12","start_date":"2016-10-10","location":"San Francisco, CA, USA","name":"MIG: Motion in Games"},"doi":"10.1145/2994258.2994261","language":[{"iso":"eng"}],"article_number":"2994261","ec_funded":1,"publist_id":"6222","acknowledgement":"This work was partly supported by the starting grant BigSplash, as well as the advanced grant EXPRESSIVE from the European Research Council (ERC-2014-StG 638176 , and ERC-2011-ADG 20110209).","year":"2016","publication_status":"published","department":[{"_id":"ChWo"}],"publisher":"ACM","author":[{"last_name":"Manteaux","first_name":"Pierre","full_name":"Manteaux, Pierre"},{"full_name":"Vimont, Ulysse","last_name":"Vimont","first_name":"Ulysse"},{"full_name":"Wojtan, Christopher J","last_name":"Wojtan","first_name":"Christopher J","orcid":"0000-0001-6646-5546","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Rohmer","first_name":"Damien","full_name":"Rohmer, Damien"},{"full_name":"Cani, Marie","last_name":"Cani","first_name":"Marie"}],"date_created":"2018-12-11T11:50:20Z","date_updated":"2023-02-21T09:49:49Z"}]