--- _id: '13049' abstract: - lang: eng text: "We propose a computational design approach for covering a surface with individually addressable RGB LEDs, effectively forming a low-resolution surface screen. To achieve a low-cost and scalable approach, we propose creating designs from flat PCB panels bent in-place along the surface of a 3D printed core. Working with standard rigid PCBs enables the use of\r\nestablished PCB manufacturing services, allowing the fabrication of designs with several hundred LEDs. \r\nOur approach optimizes the PCB geometry for folding, and then jointly optimizes the LED packing, circuit and routing, solving a challenging layout problem under strict manufacturing requirements. Unlike paper, PCBs cannot bend beyond a certain point without breaking. Therefore, we introduce parametric cut patterns acting as hinges, designed to allow bending while remaining compact. To tackle the joint optimization of placement, circuit and routing, we propose a specialized algorithm that splits the global problem into one sub-problem per triangle, which is then individually solved.\r\nOur technique generates PCB blueprints in a completely automated way. After being fabricated by a PCB manufacturing service, the boards are bent and glued by the user onto the 3D printed support. We demonstrate our technique on a range of physical models and virtual examples, creating intricate surface light patterns from hundreds of LEDs." acknowledged_ssus: - _id: M-Shop acknowledgement: We thank the reviewers for the valuable feedback. We also thank the Miba Machine Shop at ISTA, PCBWay, and PragoBoard for helping us with fabrication and assembly. This project was supported by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 715767 – MATERIALIZABLE). article_number: '142' article_processing_charge: No article_type: original author: - first_name: Marco full_name: Freire, Marco last_name: Freire - first_name: Manas full_name: Bhargava, Manas id: FF8FA64C-AA6A-11E9-99AD-50D4E5697425 last_name: Bhargava orcid: 0009-0007-6138-6890 - first_name: Camille full_name: Schreck, Camille id: 2B14B676-F248-11E8-B48F-1D18A9856A87 last_name: Schreck - first_name: Pierre-Alexandre full_name: Hugron, Pierre-Alexandre last_name: Hugron - first_name: Bernd full_name: Bickel, Bernd id: 49876194-F248-11E8-B48F-1D18A9856A87 last_name: Bickel orcid: 0000-0001-6511-9385 - first_name: Sylvain full_name: Lefebvre, Sylvain last_name: Lefebvre citation: ama: 'Freire M, Bhargava M, Schreck C, Hugron P-A, Bickel B, Lefebvre S. PCBend: Light up your 3D shapes with foldable circuit boards. Transactions on Graphics. 2023;42(4). doi:10.1145/3592411' apa: 'Freire, M., Bhargava, M., Schreck, C., Hugron, P.-A., Bickel, B., & Lefebvre, S. (2023). PCBend: Light up your 3D shapes with foldable circuit boards. Transactions on Graphics. Los Angeles, CA, United States: Association for Computing Machinery. https://doi.org/10.1145/3592411' chicago: 'Freire, Marco, Manas Bhargava, Camille Schreck, Pierre-Alexandre Hugron, Bernd Bickel, and Sylvain Lefebvre. “PCBend: Light up Your 3D Shapes with Foldable Circuit Boards.” Transactions on Graphics. Association for Computing Machinery, 2023. https://doi.org/10.1145/3592411.' ieee: 'M. Freire, M. Bhargava, C. Schreck, P.-A. Hugron, B. Bickel, and S. Lefebvre, “PCBend: Light up your 3D shapes with foldable circuit boards,” Transactions on Graphics, vol. 42, no. 4. Association for Computing Machinery, 2023.' ista: 'Freire M, Bhargava M, Schreck C, Hugron P-A, Bickel B, Lefebvre S. 2023. PCBend: Light up your 3D shapes with foldable circuit boards. Transactions on Graphics. 42(4), 142.' mla: 'Freire, Marco, et al. “PCBend: Light up Your 3D Shapes with Foldable Circuit Boards.” Transactions on Graphics, vol. 42, no. 4, 142, Association for Computing Machinery, 2023, doi:10.1145/3592411.' short: M. Freire, M. Bhargava, C. Schreck, P.-A. Hugron, B. Bickel, S. Lefebvre, Transactions on Graphics 42 (2023). conference: end_date: 2023-08-10 location: Los Angeles, CA, United States name: 'SIGGRAPH: Computer Graphics and Interactive Techniques Conference' start_date: 2023-08-06 date_created: 2023-05-22T08:37:04Z date_published: 2023-07-26T00:00:00Z date_updated: 2024-01-29T10:30:49Z day: '26' ddc: - '006' department: - _id: GradSch - _id: BeBi doi: 10.1145/3592411 ec_funded: 1 external_id: isi: - '001044671300108' file: - access_level: open_access checksum: a0b0ba3b36f43a94388e8824613d812a content_type: application/pdf creator: dernst date_created: 2023-06-19T11:02:23Z date_updated: 2023-06-19T11:02:23Z file_id: '13156' file_name: 2023_ACMToG_Freire.pdf file_size: 78940724 relation: main_file success: 1 - access_level: open_access checksum: b9206bbb67af82df49b7e7cdbde3410c content_type: application/pdf creator: dernst date_created: 2023-06-20T12:20:51Z date_updated: 2023-06-20T12:20:51Z file_id: '13157' file_name: 2023_ACMToG_SuppMaterial_Freire.pdf file_size: 34345905 relation: main_file success: 1 file_date_updated: 2023-06-20T12:20:51Z has_accepted_license: '1' intvolume: ' 42' isi: 1 issue: '4' keyword: - PCB design and layout - Mesh geometry models language: - iso: eng month: '07' oa: 1 oa_version: Submitted Version project: - _id: 24F9549A-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '715767' name: 'MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling' publication: Transactions on Graphics publication_identifier: eissn: - 1557-7368 issn: - 0730-0301 publication_status: published publisher: Association for Computing Machinery quality_controlled: '1' status: public title: 'PCBend: Light up your 3D shapes with foldable circuit boards' type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 42 year: '2023' ... --- _id: '11432' abstract: - lang: eng 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." acknowledged_ssus: - _id: ScienComp 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. article_processing_charge: No article_type: original author: - first_name: Camille full_name: Schreck, Camille id: 2B14B676-F248-11E8-B48F-1D18A9856A87 last_name: Schreck - first_name: Christopher J full_name: Wojtan, Christopher J id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87 last_name: Wojtan orcid: 0000-0001-6646-5546 citation: 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 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 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. 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. 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. 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. date_created: 2022-06-05T22:01:49Z date_published: 2022-05-01T00:00:00Z date_updated: 2023-08-02T06:44:05Z day: '01' department: - _id: ChWo doi: 10.1111/cgf.14478 ec_funded: 1 external_id: isi: - '000802723900027' intvolume: ' 41' isi: 1 issue: '2' language: - iso: eng main_file_link: - open_access: '1' url: https://hal.archives-ouvertes.fr/hal-03641349/ month: '05' oa: 1 oa_version: Submitted Version page: 343-353 project: - _id: 2533E772-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '638176' name: Efficient Simulation of Natural Phenomena at Extremely Large Scales publication: Computer Graphics Forum publication_identifier: eissn: - 1467-8659 issn: - 0167-7055 publication_status: published publisher: Wiley quality_controlled: '1' scopus_import: '1' status: public title: Coupling 3D liquid simulation with 2D wave propagation for large scale water surface animation using the equivalent sources method type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 41 year: '2022' ... --- _id: '8765' abstract: - lang: eng 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. acknowledged_ssus: - _id: ScienComp 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." article_processing_charge: No article_type: original author: - first_name: Camille full_name: Schreck, Camille id: 2B14B676-F248-11E8-B48F-1D18A9856A87 last_name: Schreck - first_name: Christopher J full_name: Wojtan, Christopher J id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87 last_name: Wojtan orcid: 0000-0001-6646-5546 citation: 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 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 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. 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. ista: Schreck C, Wojtan C. 2020. A practical method for animating anisotropic elastoplastic materials. Computer Graphics Forum. 39(2), 89–99. 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. date_created: 2020-11-17T09:35:10Z date_published: 2020-05-01T00:00:00Z date_updated: 2023-09-05T16:00:13Z day: '01' ddc: - '000' department: - _id: ChWo doi: 10.1111/cgf.13914 ec_funded: 1 external_id: isi: - '000548709600008' file: - access_level: open_access checksum: 7605f605acd84d0942b48bc7a1c2d72e content_type: application/pdf creator: dernst date_created: 2020-11-23T09:05:13Z date_updated: 2020-11-23T09:05:13Z file_id: '8796' file_name: 2020_poff_revisited.pdf file_size: 38969122 relation: main_file success: 1 file_date_updated: 2020-11-23T09:05:13Z has_accepted_license: '1' intvolume: ' 39' isi: 1 issue: '2' keyword: - Computer Networks and Communications language: - iso: eng month: '05' oa: 1 oa_version: Submitted Version page: 89-99 project: - _id: 2533E772-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '638176' name: Efficient Simulation of Natural Phenomena at Extremely Large Scales publication: Computer Graphics Forum publication_identifier: eissn: - 1467-8659 issn: - 0167-7055 publication_status: published publisher: Wiley quality_controlled: '1' scopus_import: '1' status: public title: A practical method for animating anisotropic elastoplastic materials type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 39 year: '2020' ... --- _id: '6442' abstract: - lang: eng 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. acknowledged_ssus: - _id: ScienComp article_number: '130' article_processing_charge: No author: - first_name: Camille full_name: Schreck, Camille id: 2B14B676-F248-11E8-B48F-1D18A9856A87 last_name: Schreck - first_name: Christian full_name: Hafner, Christian id: 400429CC-F248-11E8-B48F-1D18A9856A87 last_name: Hafner - first_name: Christopher J full_name: Wojtan, Christopher J id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87 last_name: Wojtan orcid: 0000-0001-6646-5546 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 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. 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. 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. short: C. Schreck, C. Hafner, C. Wojtan, ACM Transactions on Graphics 38 (2019). date_created: 2019-05-14T07:04:06Z date_published: 2019-07-01T00:00:00Z date_updated: 2023-08-25T10:18:46Z day: '01' ddc: - '000' - '005' department: - _id: ChWo doi: 10.1145/3306346.3323002 ec_funded: 1 external_id: isi: - '000475740600104' file: - access_level: open_access checksum: 1b737dfe3e051aba8f3f4ab1dceda673 content_type: application/pdf creator: dernst date_created: 2019-05-14T07:03:55Z date_updated: 2020-07-14T12:47:30Z file_id: '6443' file_name: 2019_ACM_Schreck.pdf file_size: 44328918 relation: main_file file_date_updated: 2020-07-14T12:47:30Z has_accepted_license: '1' intvolume: ' 38' isi: 1 issue: '4' language: - iso: eng month: '07' oa: 1 oa_version: Submitted Version project: - _id: 2533E772-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '638176' name: Efficient Simulation of Natural Phenomena at Extremely Large Scales - _id: 24F9549A-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '715767' name: 'MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling' - _id: 2564DBCA-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '665385' name: International IST Doctoral Program publication: ACM Transactions on Graphics publication_status: published publisher: ACM quality_controlled: '1' related_material: link: - description: News on IST Homepage relation: press_release url: https://ist.ac.at/en/news/new-method-makes-realistic-water-wave-animations-more-efficient/ scopus_import: '1' status: public title: Fundamental solutions for water wave animation type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 38 year: '2019' ... --- _id: '670' abstract: - lang: eng text: We propose an efficient method to model paper tearing in the context of interactive modeling. The method uses geometrical information to automatically detect potential starting points of tears. We further introduce a new hybrid geometrical and physical-based method to compute the trajectory of tears while procedurally synthesizing high resolution details of the tearing path using a texture based approach. The results obtained are compared with real paper and with previous studies on the expected geometric paths of paper that tears. article_processing_charge: No article_type: original author: - first_name: Camille full_name: Schreck, Camille id: 2B14B676-F248-11E8-B48F-1D18A9856A87 last_name: Schreck - first_name: Damien full_name: Rohmer, Damien last_name: Rohmer - first_name: Stefanie full_name: Hahmann, Stefanie last_name: Hahmann citation: ama: Schreck C, Rohmer D, Hahmann S. Interactive paper tearing. Computer Graphics Forum. 2017;36(2):95-106. doi:10.1111/cgf.13110 apa: Schreck, C., Rohmer, D., & Hahmann, S. (2017). Interactive paper tearing. Computer Graphics Forum. Wiley. https://doi.org/10.1111/cgf.13110 chicago: Schreck, Camille, Damien Rohmer, and Stefanie Hahmann. “Interactive Paper Tearing.” Computer Graphics Forum. Wiley, 2017. https://doi.org/10.1111/cgf.13110. ieee: C. Schreck, D. Rohmer, and S. Hahmann, “Interactive paper tearing,” Computer Graphics Forum, vol. 36, no. 2. Wiley, pp. 95–106, 2017. ista: Schreck C, Rohmer D, Hahmann S. 2017. Interactive paper tearing. Computer Graphics Forum. 36(2), 95–106. mla: Schreck, Camille, et al. “Interactive Paper Tearing.” Computer Graphics Forum, vol. 36, no. 2, Wiley, 2017, pp. 95–106, doi:10.1111/cgf.13110. short: C. Schreck, D. Rohmer, S. Hahmann, Computer Graphics Forum 36 (2017) 95–106. date_created: 2018-12-11T11:47:49Z date_published: 2017-05-01T00:00:00Z date_updated: 2021-01-12T08:08:37Z day: '01' ddc: - '000' department: - _id: ChWo doi: 10.1111/cgf.13110 intvolume: ' 36' issue: '2' language: - iso: eng main_file_link: - open_access: '1' url: https://hal.inria.fr/hal-01647113/file/eg_2017_schreck_paper_tearing.pdf month: '05' oa: 1 oa_version: Published Version page: 95 - 106 project: - _id: 25357BD2-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: P 24352-N23 name: 'Deep Pictures: Creating Visual and Haptic Vector Images' publication: Computer Graphics Forum publication_identifier: issn: - '01677055' publication_status: published publisher: Wiley publist_id: '7056' quality_controlled: '1' scopus_import: 1 status: public title: Interactive paper tearing type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 36 year: '2017' ...