--- _id: '1814' abstract: - lang: eng text: 'We present an efficient wavefront tracking algorithm for animating bodies of water that interact with their environment. Our contributions include: a novel wavefront tracking technique that enables dispersion, refraction, reflection, and diffraction in the same simulation; a unique multivalued function interpolation method that enables our simulations to elegantly sidestep the Nyquist limit; a dispersion approximation for efficiently amplifying the number of simulated waves by several orders of magnitude; and additional extensions that allow for time-dependent effects and interactive artistic editing of the resulting animation. Our contributions combine to give us multitudes more wave details than similar algorithms, while maintaining high frame rates and allowing close camera zooms.' article_number: '27' author: - first_name: Stefan full_name: Jeschke, Stefan id: 44D6411A-F248-11E8-B48F-1D18A9856A87 last_name: Jeschke - 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: Jeschke S, Wojtan C. Water wave animation via wavefront parameter interpolation. ACM Transactions on Graphics. 2015;34(3). doi:10.1145/2714572 apa: Jeschke, S., & Wojtan, C. (2015). Water wave animation via wavefront parameter interpolation. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/2714572 chicago: Jeschke, Stefan, and Chris Wojtan. “Water Wave Animation via Wavefront Parameter Interpolation.” ACM Transactions on Graphics. ACM, 2015. https://doi.org/10.1145/2714572. ieee: S. Jeschke and C. Wojtan, “Water wave animation via wavefront parameter interpolation,” ACM Transactions on Graphics, vol. 34, no. 3. ACM, 2015. ista: Jeschke S, Wojtan C. 2015. Water wave animation via wavefront parameter interpolation. ACM Transactions on Graphics. 34(3), 27. mla: Jeschke, Stefan, and Chris Wojtan. “Water Wave Animation via Wavefront Parameter Interpolation.” ACM Transactions on Graphics, vol. 34, no. 3, 27, ACM, 2015, doi:10.1145/2714572. short: S. Jeschke, C. Wojtan, ACM Transactions on Graphics 34 (2015). date_created: 2018-12-11T11:54:09Z date_published: 2015-04-01T00:00:00Z date_updated: 2023-02-23T10:15:40Z day: '01' ddc: - '000' department: - _id: ChWo doi: 10.1145/2714572 ec_funded: 1 file: - access_level: open_access checksum: 67c9f4fa370def68cdf31299e48bc91f content_type: application/pdf creator: system date_created: 2018-12-12T10:12:15Z date_updated: 2020-07-14T12:45:17Z file_id: '4933' file_name: IST-2016-575-v1+1_wavefront_preprint.pdf file_size: 23712153 relation: main_file file_date_updated: 2020-07-14T12:45:17Z has_accepted_license: '1' intvolume: ' 34' issue: '3' language: - iso: eng month: '04' oa: 1 oa_version: Submitted Version project: - _id: 25357BD2-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: P 24352-N23 name: 'Deep Pictures: Creating Visual and Haptic Vector Images' - _id: 2533E772-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '638176' name: Efficient Simulation of Natural Phenomena at Extremely Large Scales publication: ACM Transactions on Graphics publication_status: published publisher: ACM publist_id: '5292' pubrep_id: '575' quality_controlled: '1' scopus_import: 1 status: public title: Water wave animation via wavefront parameter interpolation type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 34 year: '2015' ... --- _id: '1633' abstract: - lang: eng text: "We present a method for simulating brittle fracture under the assumptions of quasi-static linear elastic fracture mechanics (LEFM). Using the boundary element method (BEM) and Lagrangian crack-fronts, we produce highly detailed fracture surfaces. The computational cost of the BEM is alleviated by using a low-resolution mesh and interpolating the resulting stress intensity factors when propagating the high-resolution crack-front.\r\n\r\nOur system produces physics-based fracture surfaces with high spatial and temporal resolution, taking spatial variation of material toughness and/or strength into account. It also allows for crack initiation to be handled separately from crack propagation, which is not only more reasonable from a physics perspective, but can also be used to control the simulation.\r\n\r\nSeparating the resolution of the crack-front from the resolution of the computational mesh increases the efficiency and therefore the amount of visual detail on the resulting fracture surfaces. The BEM also allows us to re-use previously computed blocks of the system matrix." article_number: '151' author: - first_name: David full_name: Hahn, David id: 357A6A66-F248-11E8-B48F-1D18A9856A87 last_name: Hahn - 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: 'Hahn D, Wojtan C. High-resolution brittle fracture simulation with boundary elements. In: Vol 34. ACM; 2015. doi:10.1145/2766896' apa: 'Hahn, D., & Wojtan, C. (2015). High-resolution brittle fracture simulation with boundary elements (Vol. 34). Presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, United States: ACM. https://doi.org/10.1145/2766896' chicago: Hahn, David, and Chris Wojtan. “High-Resolution Brittle Fracture Simulation with Boundary Elements,” Vol. 34. ACM, 2015. https://doi.org/10.1145/2766896. ieee: 'D. Hahn and C. Wojtan, “High-resolution brittle fracture simulation with boundary elements,” presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, United States, 2015, vol. 34, no. 4.' ista: 'Hahn D, Wojtan C. 2015. High-resolution brittle fracture simulation with boundary elements. SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques vol. 34, 151.' mla: Hahn, David, and Chris Wojtan. High-Resolution Brittle Fracture Simulation with Boundary Elements. Vol. 34, no. 4, 151, ACM, 2015, doi:10.1145/2766896. short: D. Hahn, C. Wojtan, in:, ACM, 2015. conference: end_date: 2015-08-13 location: Los Angeles, CA, United States name: 'SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques' start_date: 2015-08-09 date_created: 2018-12-11T11:53:09Z date_published: 2015-07-27T00:00:00Z date_updated: 2023-09-07T12:02:56Z day: '27' ddc: - '000' department: - _id: ChWo doi: 10.1145/2766896 ec_funded: 1 file: - access_level: open_access checksum: 955aee971983f6b6152bcc1c9b4a7c20 content_type: application/pdf creator: system date_created: 2018-12-12T10:15:13Z date_updated: 2020-07-14T12:45:07Z file_id: '5131' file_name: IST-2016-609-v1+1_FractureBEM.pdf file_size: 20154270 relation: main_file file_date_updated: 2020-07-14T12:45:07Z has_accepted_license: '1' intvolume: ' 34' 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 publication_status: published publisher: ACM publist_id: '5522' pubrep_id: '609' quality_controlled: '1' related_material: record: - id: '839' relation: dissertation_contains status: public scopus_import: 1 status: public title: High-resolution brittle fracture simulation with boundary elements type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 34 year: '2015' ... --- _id: '1629' abstract: - lang: eng text: We propose a method for propagating edit operations in 2D vector graphics, based on geometric relationship functions. These functions quantify the geometric relationship of a point to a polygon, such as the distance to the boundary or the direction to the closest corner vertex. The level sets of the relationship functions describe points with the same relationship to a polygon. For a given query point, we first determine a set of relationships to local features, construct all level sets for these relationships, and accumulate them. The maxima of the resulting distribution are points with similar geometric relationships. We show extensions to handle mirror symmetries, and discuss the use of relationship functions as local coordinate systems. Our method can be applied, for example, to interactive floorplan editing, and it is especially useful for large layouts, where individual edits would be cumbersome. We demonstrate populating 2D layouts with tens to hundreds of objects by propagating relatively few edit operations. article_number: '15' author: - first_name: Paul full_name: Guerrero, Paul last_name: Guerrero - first_name: Stefan full_name: Jeschke, Stefan id: 44D6411A-F248-11E8-B48F-1D18A9856A87 last_name: Jeschke - first_name: Michael full_name: Wimmer, Michael last_name: Wimmer - first_name: Peter full_name: Wonka, Peter last_name: Wonka citation: ama: Guerrero P, Jeschke S, Wimmer M, Wonka P. Edit propagation using geometric relationship functions. ACM Transactions on Graphics. 2014;33(2). doi:10.1145/2591010 apa: Guerrero, P., Jeschke, S., Wimmer, M., & Wonka, P. (2014). Edit propagation using geometric relationship functions. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/2591010 chicago: Guerrero, Paul, Stefan Jeschke, Michael Wimmer, and Peter Wonka. “Edit Propagation Using Geometric Relationship Functions.” ACM Transactions on Graphics. ACM, 2014. https://doi.org/10.1145/2591010. ieee: P. Guerrero, S. Jeschke, M. Wimmer, and P. Wonka, “Edit propagation using geometric relationship functions,” ACM Transactions on Graphics, vol. 33, no. 2. ACM, 2014. ista: Guerrero P, Jeschke S, Wimmer M, Wonka P. 2014. Edit propagation using geometric relationship functions. ACM Transactions on Graphics. 33(2), 15. mla: Guerrero, Paul, et al. “Edit Propagation Using Geometric Relationship Functions.” ACM Transactions on Graphics, vol. 33, no. 2, 15, ACM, 2014, doi:10.1145/2591010. short: P. Guerrero, S. Jeschke, M. Wimmer, P. Wonka, ACM Transactions on Graphics 33 (2014). date_created: 2018-12-11T11:53:08Z date_published: 2014-03-01T00:00:00Z date_updated: 2021-01-12T06:52:06Z day: '01' ddc: - '000' department: - _id: ChWo doi: 10.1145/2591010 file: - access_level: open_access checksum: 7f91e588a4e888610313b98271e6418e content_type: application/pdf creator: system date_created: 2018-12-12T10:11:22Z date_updated: 2020-07-14T12:45:07Z file_id: '4876' file_name: IST-2016-577-v1+1_2014.TOG.Paul.EditingPropagation.final.pdf file_size: 9832561 relation: main_file file_date_updated: 2020-07-14T12:45:07Z has_accepted_license: '1' intvolume: ' 33' issue: '2' language: - iso: eng month: '03' oa: 1 oa_version: Submitted Version publication: ACM Transactions on Graphics publication_status: published publisher: ACM publist_id: '5526' pubrep_id: '577' quality_controlled: '1' status: public title: Edit propagation using geometric relationship functions type: journal_article user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87 volume: 33 year: '2014' ... --- _id: '1854' abstract: - lang: eng text: In this paper, we present a method for non-rigid, partial shape matching in vector graphics. Given a user-specified query region in a 2D shape, similar regions are found, even if they are non-linearly distorted. Furthermore, a non-linear mapping is established between the query regions and these matches, which allows the automatic transfer of editing operations such as texturing. This is achieved by a two-step approach. First, pointwise correspondences between the query region and the whole shape are established. The transformation parameters of these correspondences are registered in an appropriate transformation space. For transformations between similar regions, these parameters form surfaces in transformation space, which are extracted in the second step of our method. The extracted regions may be related to the query region by a non-rigid transform, enabling non-rigid shape matching. In this paper, we present a method for non-rigid, partial shape matching in vector graphics. Given a user-specified query region in a 2D shape, similar regions are found, even if they are non-linearly distorted. Furthermore, a non-linear mapping is established between the query regions and these matches, which allows the automatic transfer of editing operations such as texturing. This is achieved by a two-step approach. First, pointwise correspondences between the query region and the whole shape are established. The transformation parameters of these correspondences are registered in an appropriate transformation space. For transformations between similar regions, these parameters form surfaces in transformation space, which are extracted in the second step of our method. The extracted regions may be related to the query region by a non-rigid transform, enabling non-rigid shape matching. author: - first_name: Paul full_name: Guerrero, Paul last_name: Guerrero - first_name: Thomas full_name: Auzinger, Thomas id: 4718F954-F248-11E8-B48F-1D18A9856A87 last_name: Auzinger orcid: 0000-0002-1546-3265 - first_name: Michael full_name: Wimmer, Michael last_name: Wimmer - first_name: Stefan full_name: Jeschke, Stefan id: 44D6411A-F248-11E8-B48F-1D18A9856A87 last_name: Jeschke citation: ama: Guerrero P, Auzinger T, Wimmer M, Jeschke S. Partial shape matching using transformation parameter similarity. Computer Graphics Forum. 2014;34(1):239-252. doi:10.1111/cgf.12509 apa: Guerrero, P., Auzinger, T., Wimmer, M., & Jeschke, S. (2014). Partial shape matching using transformation parameter similarity. Computer Graphics Forum. Wiley. https://doi.org/10.1111/cgf.12509 chicago: Guerrero, Paul, Thomas Auzinger, Michael Wimmer, and Stefan Jeschke. “Partial Shape Matching Using Transformation Parameter Similarity.” Computer Graphics Forum. Wiley, 2014. https://doi.org/10.1111/cgf.12509. ieee: P. Guerrero, T. Auzinger, M. Wimmer, and S. Jeschke, “Partial shape matching using transformation parameter similarity,” Computer Graphics Forum, vol. 34, no. 1. Wiley, pp. 239–252, 2014. ista: Guerrero P, Auzinger T, Wimmer M, Jeschke S. 2014. Partial shape matching using transformation parameter similarity. Computer Graphics Forum. 34(1), 239–252. mla: Guerrero, Paul, et al. “Partial Shape Matching Using Transformation Parameter Similarity.” Computer Graphics Forum, vol. 34, no. 1, Wiley, 2014, pp. 239–52, doi:10.1111/cgf.12509. short: P. Guerrero, T. Auzinger, M. Wimmer, S. Jeschke, Computer Graphics Forum 34 (2014) 239–252. date_created: 2018-12-11T11:54:22Z date_published: 2014-11-05T00:00:00Z date_updated: 2021-01-12T06:53:38Z day: '05' ddc: - '000' department: - _id: ChWo doi: 10.1111/cgf.12509 file: - access_level: open_access checksum: 91946bfc509c77f5fd3151a3ff2b2c8f content_type: application/pdf creator: system date_created: 2018-12-12T10:15:58Z date_updated: 2020-07-14T12:45:19Z file_id: '5182' file_name: IST-2016-574-v1+1_Guerrero-2014-TPS-paper.pdf file_size: 24817484 relation: main_file file_date_updated: 2020-07-14T12:45:19Z has_accepted_license: '1' intvolume: ' 34' issue: '1' language: - iso: eng month: '11' oa: 1 oa_version: Submitted Version page: 239 - 252 publication: Computer Graphics Forum publication_status: published publisher: Wiley publist_id: '5246' pubrep_id: '574' quality_controlled: '1' scopus_import: 1 status: public title: Partial shape matching using transformation parameter similarity type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 34 year: '2014' ... --- _id: '1906' abstract: - lang: eng text: In this paper, we introduce a novel scene representation for the visualization of large-scale point clouds accompanied by a set of high-resolution photographs. Many real-world applications deal with very densely sampled point-cloud data, which are augmented with photographs that often reveal lighting variations and inaccuracies in registration. Consequently, the high-quality representation of the captured data, i.e., both point clouds and photographs together, is a challenging and time-consuming task. We propose a two-phase approach, in which the first (preprocessing) phase generates multiple overlapping surface patches and handles the problem of seamless texture generation locally for each patch. The second phase stitches these patches at render-time to produce a high-quality visualization of the data. As a result of the proposed localization of the global texturing problem, our algorithm is more than an order of magnitude faster than equivalent mesh-based texturing techniques. Furthermore, since our preprocessing phase requires only a minor fraction of the whole data set at once, we provide maximum flexibility when dealing with growing data sets. acknowledgement: This research was supported by the Austrian Research Promotion Agency (FFG) project REPLICATE (no. 835948), the EU FP7 project HARVEST4D (no. 323567). author: - first_name: Murat full_name: Arikan, Murat last_name: Arikan - first_name: Reinhold full_name: Preiner, Reinhold last_name: Preiner - first_name: Claus full_name: Scheiblauer, Claus last_name: Scheiblauer - first_name: Stefan full_name: Jeschke, Stefan id: 44D6411A-F248-11E8-B48F-1D18A9856A87 last_name: Jeschke - first_name: Michael full_name: Wimmer, Michael last_name: Wimmer citation: ama: Arikan M, Preiner R, Scheiblauer C, Jeschke S, Wimmer M. Large-scale point-cloud visualization through localized textured surface reconstruction. IEEE Transactions on Visualization and Computer Graphics. 2014;20(9):1280-1292. doi:10.1109/TVCG.2014.2312011 apa: Arikan, M., Preiner, R., Scheiblauer, C., Jeschke, S., & Wimmer, M. (2014). Large-scale point-cloud visualization through localized textured surface reconstruction. IEEE Transactions on Visualization and Computer Graphics. IEEE. https://doi.org/10.1109/TVCG.2014.2312011 chicago: Arikan, Murat, Reinhold Preiner, Claus Scheiblauer, Stefan Jeschke, and Michael Wimmer. “Large-Scale Point-Cloud Visualization through Localized Textured Surface Reconstruction.” IEEE Transactions on Visualization and Computer Graphics. IEEE, 2014. https://doi.org/10.1109/TVCG.2014.2312011. ieee: M. Arikan, R. Preiner, C. Scheiblauer, S. Jeschke, and M. Wimmer, “Large-scale point-cloud visualization through localized textured surface reconstruction,” IEEE Transactions on Visualization and Computer Graphics, vol. 20, no. 9. IEEE, pp. 1280–1292, 2014. ista: Arikan M, Preiner R, Scheiblauer C, Jeschke S, Wimmer M. 2014. Large-scale point-cloud visualization through localized textured surface reconstruction. IEEE Transactions on Visualization and Computer Graphics. 20(9), 1280–1292. mla: Arikan, Murat, et al. “Large-Scale Point-Cloud Visualization through Localized Textured Surface Reconstruction.” IEEE Transactions on Visualization and Computer Graphics, vol. 20, no. 9, IEEE, 2014, pp. 1280–92, doi:10.1109/TVCG.2014.2312011. short: M. Arikan, R. Preiner, C. Scheiblauer, S. Jeschke, M. Wimmer, IEEE Transactions on Visualization and Computer Graphics 20 (2014) 1280–1292. date_created: 2018-12-11T11:54:39Z date_published: 2014-09-09T00:00:00Z date_updated: 2021-01-12T06:53:59Z day: '09' ddc: - '000' department: - _id: ChWo doi: 10.1109/TVCG.2014.2312011 file: - access_level: open_access checksum: 5bf58942d2eb20adf03c7f9ea2e68124 content_type: application/pdf creator: system date_created: 2018-12-12T10:17:41Z date_updated: 2020-07-14T12:45:20Z file_id: '5297' file_name: IST-2016-573-v1+1_arikan-2014-pcvis-draft.pdf file_size: 13594598 relation: main_file file_date_updated: 2020-07-14T12:45:20Z has_accepted_license: '1' intvolume: ' 20' issue: '9' language: - iso: eng month: '09' oa: 1 oa_version: Submitted Version page: 1280 - 1292 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: IEEE Transactions on Visualization and Computer Graphics publication_status: published publisher: IEEE publist_id: '5189' pubrep_id: '573' scopus_import: 1 status: public title: Large-scale point-cloud visualization through localized textured surface reconstruction type: journal_article user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87 volume: 20 year: '2014' ... --- _id: '2058' abstract: - lang: eng text: We present a method for smoothly blending between existing liquid animations. We introduce a semi-automatic method for matching two existing liquid animations, which we use to create new fluid motion that plausibly interpolates the input. Our contributions include a new space-time non-rigid iterative closest point algorithm that incorporates user guidance, a subsampling technique for efficient registration of meshes with millions of vertices, and a fast surface extraction algorithm that produces 3D triangle meshes from a 4D space-time surface. Our technique can be used to instantly create hundreds of new simulations, or to interactively explore complex parameter spaces. Our method is guaranteed to produce output that does not deviate from the input animations, and it generalizes to multiple dimensions. Because our method runs at interactive rates after the initial precomputation step, it has potential applications in games and training simulations. article_number: '137' article_processing_charge: No author: - first_name: Karthik full_name: Raveendran, Karthik last_name: Raveendran - first_name: Christopher J full_name: Wojtan, Christopher J id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87 last_name: Wojtan orcid: 0000-0001-6646-5546 - first_name: Nils full_name: Thuerey, Nils last_name: Thuerey - first_name: Greg full_name: Türk, Greg last_name: Türk citation: ama: 'Raveendran K, Wojtan C, Thuerey N, Türk G. Blending liquids. In: ACM Transactions on Graphics. Vol 33. ACM; 2014. doi:10.1145/2601097.2601126' apa: 'Raveendran, K., Wojtan, C., Thuerey, N., & Türk, G. (2014). Blending liquids. In ACM Transactions on Graphics (Vol. 33). Vancouver, Canada: ACM. https://doi.org/10.1145/2601097.2601126' chicago: Raveendran, Karthik, Chris Wojtan, Nils Thuerey, and Greg Türk. “Blending Liquids.” In ACM Transactions on Graphics, Vol. 33. ACM, 2014. https://doi.org/10.1145/2601097.2601126. ieee: K. Raveendran, C. Wojtan, N. Thuerey, and G. Türk, “Blending liquids,” in ACM Transactions on Graphics, Vancouver, Canada, 2014, vol. 33, no. 4. ista: 'Raveendran K, Wojtan C, Thuerey N, Türk G. 2014. Blending liquids. ACM Transactions on Graphics. SIGGRAPH: International Conference and Exhibition on Computer Graphics and Interactive Techniques vol. 33, 137.' mla: Raveendran, Karthik, et al. “Blending Liquids.” ACM Transactions on Graphics, vol. 33, no. 4, 137, ACM, 2014, doi:10.1145/2601097.2601126. short: K. Raveendran, C. Wojtan, N. Thuerey, G. Türk, in:, ACM Transactions on Graphics, ACM, 2014. conference: end_date: 2014-08-14 location: Vancouver, Canada name: 'SIGGRAPH: International Conference and Exhibition on Computer Graphics and Interactive Techniques' start_date: 2014-08-10 date_created: 2018-12-11T11:55:28Z date_published: 2014-07-01T00:00:00Z date_updated: 2022-08-25T14:02:46Z day: '01' ddc: - '000' department: - _id: ChWo doi: 10.1145/2601097.2601126 file: - access_level: open_access checksum: 1752760a2e71e254537f31c0d10d9c6c content_type: application/pdf creator: system date_created: 2018-12-12T10:08:27Z date_updated: 2020-07-14T12:45:27Z file_id: '4688' file_name: IST-2016-606-v1+1_BlendingLiquids-Preprint.pdf file_size: 8387384 relation: main_file file_date_updated: 2020-07-14T12:45:27Z has_accepted_license: '1' intvolume: ' 33' issue: '4' language: - iso: eng month: '07' oa: 1 oa_version: Submitted Version project: - _id: 25636330-B435-11E9-9278-68D0E5697425 grant_number: 11-NSF-1070 name: ROOTS Genome-wide Analysis of Root Traits publication: ACM Transactions on Graphics publication_status: published publisher: ACM publist_id: '4988' pubrep_id: '606' quality_controlled: '1' scopus_import: '1' status: public title: Blending liquids type: conference user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87 volume: 33 year: '2014' ... --- _id: '2466' abstract: - lang: eng text: 'We introduce a new method for efficiently simulating liquid with extreme amounts of spatial adaptivity. Our method combines several key components to drastically speed up the simulation of large-scale fluid phenomena: We leverage an alternative Eulerian tetrahedral mesh discretization to significantly reduce the complexity of the pressure solve while increasing the robustness with respect to element quality and removing the possibility of locking. Next, we enable subtle free-surface phenomena by deriving novel second-order boundary conditions consistent with our discretization. We couple this discretization with a spatially adaptive Fluid-Implicit Particle (FLIP) method, enabling efficient, robust, minimally-dissipative simulations that can undergo sharp changes in spatial resolution while minimizing artifacts. Along the way, we provide a new method for generating a smooth and detailed surface from a set of particles with variable sizes. Finally, we explore several new sizing functions for determining spatially adaptive simulation resolutions, and we show how to couple them to our simulator. We combine each of these elements to produce a simulation algorithm that is capable of creating animations at high maximum resolutions while avoiding common pitfalls like inaccurate boundary conditions and inefficient computation.' article_number: '103' author: - first_name: Ryoichi full_name: Ando, Ryoichi last_name: Ando - first_name: Nils full_name: Thuerey, Nils last_name: Thuerey - 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: Ando R, Thuerey N, Wojtan C. Highly adaptive liquid simulations on tetrahedral meshes. ACM Transactions on Graphics. 2013;32(4). doi:10.1145/2461912.2461982 apa: Ando, R., Thuerey, N., & Wojtan, C. (2013). Highly adaptive liquid simulations on tetrahedral meshes. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/2461912.2461982 chicago: Ando, Ryoichi, Nils Thuerey, and Chris Wojtan. “Highly Adaptive Liquid Simulations on Tetrahedral Meshes.” ACM Transactions on Graphics. ACM, 2013. https://doi.org/10.1145/2461912.2461982. ieee: R. Ando, N. Thuerey, and C. Wojtan, “Highly adaptive liquid simulations on tetrahedral meshes,” ACM Transactions on Graphics, vol. 32, no. 4. ACM, 2013. ista: Ando R, Thuerey N, Wojtan C. 2013. Highly adaptive liquid simulations on tetrahedral meshes. ACM Transactions on Graphics. 32(4), 103. mla: Ando, Ryoichi, et al. “Highly Adaptive Liquid Simulations on Tetrahedral Meshes.” ACM Transactions on Graphics, vol. 32, no. 4, 103, ACM, 2013, doi:10.1145/2461912.2461982. short: R. Ando, N. Thuerey, C. Wojtan, ACM Transactions on Graphics 32 (2013). date_created: 2018-12-11T11:57:50Z date_published: 2013-07-01T00:00:00Z date_updated: 2023-02-23T10:44:14Z day: '01' ddc: - '000' department: - _id: ChWo doi: 10.1145/2461912.2461982 file: - access_level: open_access checksum: aeea6b0ff2b27c695aeb8408c7d2fc50 content_type: application/pdf creator: system date_created: 2018-12-12T10:17:25Z date_updated: 2020-07-14T12:45:41Z file_id: '5279' file_name: IST-2016-605-v1+1_tetflip_fixed.pdf file_size: 8601561 relation: main_file file_date_updated: 2020-07-14T12:45:41Z has_accepted_license: '1' intvolume: ' 32' issue: '4' language: - iso: eng month: '07' oa: 1 oa_version: Submitted Version publication: ACM Transactions on Graphics publication_status: published publisher: ACM publist_id: '4436' pubrep_id: '605' quality_controlled: '1' scopus_import: 1 status: public title: Highly adaptive liquid simulations on tetrahedral meshes type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 32 year: '2013' ... --- _id: '2467' abstract: - lang: eng text: This paper presents a method for computing topology changes for triangle meshes in an interactive geometric modeling environment. Most triangle meshes in practice do not exhibit desirable geometric properties, so we develop a solution that is independent of standard assumptions and robust to geometric errors. Specifically, we provide the first method for topology change applicable to arbitrary non-solid, non-manifold, non-closed, self-intersecting surfaces. We prove that this new method for topology change produces the expected conventional results when applied to solid (closed, manifold, non-self-intersecting) surfaces---that is, we prove a backwards-compatibility property relative to prior work. Beyond solid surfaces, we present empirical evidence that our method remains tolerant to a variety of surface aberrations through the incorporation of a novel error correction scheme. Finally, we demonstrate how topology change applied to non-solid objects enables wholly new and useful behaviors. article_number: '34' author: - first_name: Gilbert full_name: Bernstein, Gilbert last_name: Bernstein - 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: 'Bernstein G, Wojtan C. Putting holes in holey geometry: Topology change for arbitrary surfaces. ACM Transactions on Graphics. 2013;32(4). doi:10.1145/2461912.2462027' apa: 'Bernstein, G., & Wojtan, C. (2013). Putting holes in holey geometry: Topology change for arbitrary surfaces. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/2461912.2462027' chicago: 'Bernstein, Gilbert, and Chris Wojtan. “Putting Holes in Holey Geometry: Topology Change for Arbitrary Surfaces.” ACM Transactions on Graphics. ACM, 2013. https://doi.org/10.1145/2461912.2462027.' ieee: 'G. Bernstein and C. Wojtan, “Putting holes in holey geometry: Topology change for arbitrary surfaces,” ACM Transactions on Graphics, vol. 32, no. 4. ACM, 2013.' ista: 'Bernstein G, Wojtan C. 2013. Putting holes in holey geometry: Topology change for arbitrary surfaces. ACM Transactions on Graphics. 32(4), 34.' mla: 'Bernstein, Gilbert, and Chris Wojtan. “Putting Holes in Holey Geometry: Topology Change for Arbitrary Surfaces.” ACM Transactions on Graphics, vol. 32, no. 4, 34, ACM, 2013, doi:10.1145/2461912.2462027.' short: G. Bernstein, C. Wojtan, ACM Transactions on Graphics 32 (2013). date_created: 2018-12-11T11:57:50Z date_published: 2013-07-01T00:00:00Z date_updated: 2023-02-23T10:44:16Z day: '01' ddc: - '000' department: - _id: ChWo doi: 10.1145/2461912.2462027 file: - access_level: open_access checksum: 9c8425d62246996ca632c5a01870515b content_type: application/pdf creator: system date_created: 2018-12-12T10:09:43Z date_updated: 2020-07-14T12:45:41Z file_id: '4768' file_name: IST-2016-604-v1+1_toptop2013.pdf file_size: 3514674 relation: main_file file_date_updated: 2020-07-14T12:45:41Z has_accepted_license: '1' intvolume: ' 32' issue: '4' language: - iso: eng month: '07' oa: 1 oa_version: Submitted Version publication: ACM Transactions on Graphics publication_status: published publisher: ACM publist_id: '4435' pubrep_id: '604' quality_controlled: '1' scopus_import: 1 status: public title: 'Putting holes in holey geometry: Topology change for arbitrary surfaces' type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 32 year: '2013' ... --- _id: '2468' abstract: - lang: eng text: Our work concerns the combination of an Eulerian liquid simulation with a high-resolution surface tracker (e.g. the level set method or a Lagrangian triangle mesh). The naive application of a high-resolution surface tracker to a low-resolution velocity field can produce many visually disturbing physical and topological artifacts that limit their use in practice. We address these problems by defining an error function which compares the current state of the surface tracker to the set of physically valid surface states. By reducing this error with a gradient descent technique, we introduce a novel physics-based surface fairing method. Similarly, by treating this error function as a potential energy, we derive a new surface correction force that mimics the vortex sheet equations. We demonstrate our results with both level set and mesh-based surface trackers. article_number: '68' author: - first_name: Morten full_name: Bojsen-Hansen, Morten id: 439F0C8C-F248-11E8-B48F-1D18A9856A87 last_name: Bojsen-Hansen orcid: 0000-0002-4417-3224 - 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: Bojsen-Hansen M, Wojtan C. Liquid surface tracking with error compensation. ACM Transactions on Graphics. 2013;32(4). doi:10.1145/2461912.2461991 apa: Bojsen-Hansen, M., & Wojtan, C. (2013). Liquid surface tracking with error compensation. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/2461912.2461991 chicago: Bojsen-Hansen, Morten, and Chris Wojtan. “Liquid Surface Tracking with Error Compensation.” ACM Transactions on Graphics. ACM, 2013. https://doi.org/10.1145/2461912.2461991. ieee: M. Bojsen-Hansen and C. Wojtan, “Liquid surface tracking with error compensation,” ACM Transactions on Graphics, vol. 32, no. 4. ACM, 2013. ista: Bojsen-Hansen M, Wojtan C. 2013. Liquid surface tracking with error compensation. ACM Transactions on Graphics. 32(4), 68. mla: Bojsen-Hansen, Morten, and Chris Wojtan. “Liquid Surface Tracking with Error Compensation.” ACM Transactions on Graphics, vol. 32, no. 4, 68, ACM, 2013, doi:10.1145/2461912.2461991. short: M. Bojsen-Hansen, C. Wojtan, ACM Transactions on Graphics 32 (2013). date_created: 2018-12-11T11:57:50Z date_published: 2013-07-01T00:00:00Z date_updated: 2023-02-23T10:44:18Z day: '01' ddc: - '000' department: - _id: ChWo doi: 10.1145/2461912.2461991 file: - access_level: open_access checksum: 53d905e0180e23ef3e813b969ffed4e1 content_type: application/pdf creator: system date_created: 2018-12-12T10:09:37Z date_updated: 2020-07-14T12:45:41Z file_id: '4761' file_name: IST-2016-603-v1+1_liquidError_web.pdf file_size: 5813685 relation: main_file file_date_updated: 2020-07-14T12:45:41Z has_accepted_license: '1' intvolume: ' 32' issue: '4' language: - iso: eng month: '07' oa: 1 oa_version: Submitted Version publication: ACM Transactions on Graphics publication_status: published publisher: ACM publist_id: '4434' pubrep_id: '603' quality_controlled: '1' scopus_import: 1 status: public title: Liquid surface tracking with error compensation type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 32 year: '2013' ... --- _id: '3119' abstract: - lang: eng text: "We present an approach for artist-directed animation of liquids using multiple levels of control over the simulation, ranging from the overall tracking of desired shapes to highly detailed secondary effects such as dripping streams, separating sheets of fluid, surface waves and ripples. The first portion of our technique is a volume preserving morph that allows the animator to produce a plausible fluid-like motion from a sparse set of control meshes. By rasterizing the resulting control meshes onto the simulation grid, the mesh velocities act as boundary conditions during the projection step of the fluid simulation. We can then blend this motion together with uncontrolled fluid velocities to achieve a more relaxed control over the fluid that captures natural inertial effects. Our method can produce highly detailed liquid surfaces with control over sub-grid details by using a mesh-based surface tracker on top of a coarse grid-based fluid simulation. We can create ripples and waves on the fluid surface attracting the surface mesh to the control mesh with spring-like forces and also by running a wave simulation over the surface mesh. Our video results demonstrate how our control scheme can be used to create animated characters and shapes that are made of water.\r\n" acknowledgement: This work was partially funded by NSF grants CCF-0811485 and IIS-1130934. We would like to thank Scanline VFX for additional funding. We would like to thank Jie Tan as well as our anonymous reviewers for their useful suggestions and feedback. author: - first_name: Karthik full_name: Raveendran, Karthik last_name: Raveendran - first_name: Nils full_name: Thuerey, Nils last_name: Thuerey - first_name: Christopher J full_name: Wojtan, Christopher J id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87 last_name: Wojtan orcid: 0000-0001-6646-5546 - first_name: Greg full_name: Turk, Greg last_name: Turk citation: ama: 'Raveendran K, Thuerey N, Wojtan C, Turk G. Controlling liquids using meshes. In: Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Computer Animation. ACM; 2012:255-264.' apa: 'Raveendran, K., Thuerey, N., Wojtan, C., & Turk, G. (2012). Controlling liquids using meshes. In Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Computer Animation (pp. 255–264). Aire-la-Ville, Switzerland: ACM.' chicago: Raveendran, Karthik, Nils Thuerey, Chris Wojtan, and Greg Turk. “Controlling Liquids Using Meshes.” In Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Computer Animation, 255–64. ACM, 2012. ieee: K. Raveendran, N. Thuerey, C. Wojtan, and G. Turk, “Controlling liquids using meshes,” in Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Computer Animation, Aire-la-Ville, Switzerland, 2012, pp. 255–264. ista: 'Raveendran K, Thuerey N, Wojtan C, Turk G. 2012. Controlling liquids using meshes. Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Computer Animation. SCA: ACM SIGGRAPH/Eurographics Symposium on Computer animation, 255–264.' mla: Raveendran, Karthik, et al. “Controlling Liquids Using Meshes.” Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Computer Animation, ACM, 2012, pp. 255–64. short: K. Raveendran, N. Thuerey, C. Wojtan, G. Turk, in:, Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Computer Animation, ACM, 2012, pp. 255–264. conference: end_date: 2012-07-31 location: Aire-la-Ville, Switzerland name: 'SCA: ACM SIGGRAPH/Eurographics Symposium on Computer animation' start_date: 2012-07-29 date_created: 2018-12-11T12:01:30Z date_published: 2012-07-29T00:00:00Z date_updated: 2023-02-23T11:13:07Z day: '29' ddc: - '000' department: - _id: ChWo file: - access_level: open_access checksum: babda64c24cf90a4d05ae86d712bed08 content_type: application/pdf creator: system date_created: 2018-12-12T10:11:23Z date_updated: 2020-07-14T12:46:00Z file_id: '4877' file_name: IST-2016-600-v1+1_ControllingLiquids_Preprint.pdf file_size: 4939370 relation: main_file file_date_updated: 2020-07-14T12:46:00Z has_accepted_license: '1' language: - iso: eng month: '07' oa: 1 oa_version: Submitted Version page: 255 - 264 publication: Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Computer Animation publication_status: published publisher: ACM publist_id: '3580' pubrep_id: '600' quality_controlled: '1' related_material: link: - relation: table_of_contents url: http://dl.acm.org/citation.cfm?id=2422393 scopus_import: 1 status: public title: Controlling liquids using meshes type: conference user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87 year: '2012' ...