--- _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' ... --- _id: '3118' abstract: - lang: eng text: We present a method for recovering a temporally coherent, deforming triangle mesh with arbitrarily changing topology from an incoherent sequence of static closed surfaces. We solve this problem using the surface geometry alone, without any prior information like surface templates or velocity fields. Our system combines a proven strategy for triangle mesh improvement, a robust multi-resolution non-rigid registration routine, and a reliable technique for changing surface mesh topology. We also introduce a novel topological constraint enforcement algorithm to ensure that the output and input always have similar topology. We apply our technique to a series of diverse input data from video reconstructions, physics simulations, and artistic morphs. The structured output of our algorithm allows us to efficiently track information like colors and displacement maps, recover velocity information, and solve PDEs on the mesh as a post process. acknowledgement: "This work is supported by the SNF fellowship PBEZP2-134464.\r\nWe would like to thank Xiaochen Hu for implementing mesh con- version tools, Duygu Ceylan for helping with the rendering, and Art Tevs for the human performance data comparison. We also thank Nils Thuerey and Christopher Batty for helpful discussions. " alternative_title: - SIGGRAPH article_number: '53' article_processing_charge: No article_type: original 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: Hao full_name: Li, Hao last_name: Li - 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, Li H, Wojtan C. Tracking surfaces with evolving topology. ACM Transactions on Graphics. 2012;31(4). doi:10.1145/2185520.2185549 apa: Bojsen-Hansen, M., Li, H., & Wojtan, C. (2012). Tracking surfaces with evolving topology. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/2185520.2185549 chicago: Bojsen-Hansen, Morten, Hao Li, and Chris Wojtan. “Tracking Surfaces with Evolving Topology.” ACM Transactions on Graphics. ACM, 2012. https://doi.org/10.1145/2185520.2185549. ieee: M. Bojsen-Hansen, H. Li, and C. Wojtan, “Tracking surfaces with evolving topology,” ACM Transactions on Graphics, vol. 31, no. 4. ACM, 2012. ista: Bojsen-Hansen M, Li H, Wojtan C. 2012. Tracking surfaces with evolving topology. ACM Transactions on Graphics. 31(4), 53. mla: Bojsen-Hansen, Morten, et al. “Tracking Surfaces with Evolving Topology.” ACM Transactions on Graphics, vol. 31, no. 4, 53, ACM, 2012, doi:10.1145/2185520.2185549. short: M. Bojsen-Hansen, H. Li, C. Wojtan, ACM Transactions on Graphics 31 (2012). date_created: 2018-12-11T12:01:29Z date_published: 2012-07-01T00:00:00Z date_updated: 2022-05-24T08:21:11Z day: '01' ddc: - '000' department: - _id: ChWo doi: 10.1145/2185520.2185549 file: - access_level: open_access checksum: 1e219c5bf4e5552c1290c62eefa5cd60 content_type: application/pdf creator: system date_created: 2018-12-12T10:18:37Z date_updated: 2020-07-14T12:46:00Z file_id: '5359' file_name: IST-2016-602-v1+1_topoReg.pdf file_size: 44538518 relation: main_file file_date_updated: 2020-07-14T12:46:00Z has_accepted_license: '1' intvolume: ' 31' 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: '3581' pubrep_id: '602' quality_controlled: '1' scopus_import: '1' status: public title: Tracking surfaces with evolving topology type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 31 year: '2012' ... --- _id: '3123' abstract: - lang: eng text: We introduce the idea of using an explicit triangle mesh to track the air/fluid interface in a smoothed particle hydrodynamics (SPH) simulator. Once an initial surface mesh is created, this mesh is carried forward in time using nearby particle velocities to advect the mesh vertices. The mesh connectivity remains mostly unchanged across time-steps; it is only modified locally for topology change events or for the improvement of triangle quality. In order to ensure that the surface mesh does not diverge from the underlying particle simulation, we periodically project the mesh surface onto an implicit surface defined by the physics simulation. The mesh surface gives us several advantages over previous SPH surface tracking techniques. We demonstrate a new method for surface tension calculations that clearly outperforms the state of the art in SPH surface tension for computer graphics. We also demonstrate a method for tracking detailed surface information (like colors) that is less susceptible to numerical diffusion than competing techniques. Finally, our temporally-coherent surface mesh allows us to simulate high-resolution surface wave dynamics without being limited by the particle resolution of the SPH simulation. acknowledgement: This work was funded by NSF grant IIS-1017014 and CCF- 0917093. alternative_title: - Eurographics article_processing_charge: No author: - first_name: Jihun full_name: Yu, Jihun last_name: Yu - 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 - first_name: Chee full_name: Yap, Chee last_name: Yap citation: ama: 'Yu J, Wojtan C, Turk G, Yap C. Explicit mesh surfaces for particle based fluids. In: Computer Graphics Forum. Vol 31. Wiley; 2012:815-824. doi:10.1111/j.1467-8659.2012.03062.x' apa: 'Yu, J., Wojtan, C., Turk, G., & Yap, C. (2012). Explicit mesh surfaces for particle based fluids. In Computer Graphics Forum (Vol. 31, pp. 815–824). Cagliari, Sardinia, Italy: Wiley. https://doi.org/10.1111/j.1467-8659.2012.03062.x' chicago: Yu, Jihun, Chris Wojtan, Greg Turk, and Chee Yap. “Explicit Mesh Surfaces for Particle Based Fluids.” In Computer Graphics Forum, 31:815–24. Wiley, 2012. https://doi.org/10.1111/j.1467-8659.2012.03062.x. ieee: J. Yu, C. Wojtan, G. Turk, and C. Yap, “Explicit mesh surfaces for particle based fluids,” in Computer Graphics Forum, Cagliari, Sardinia, Italy, 2012, vol. 31, no. 2, pp. 815–824. ista: 'Yu J, Wojtan C, Turk G, Yap C. 2012. Explicit mesh surfaces for particle based fluids. Computer Graphics Forum. EUROGRAPHICS: Conference on European Association for Computer Graphics, Eurographics, vol. 31, 815–824.' mla: Yu, Jihun, et al. “Explicit Mesh Surfaces for Particle Based Fluids.” Computer Graphics Forum, vol. 31, no. 2, Wiley, 2012, pp. 815–24, doi:10.1111/j.1467-8659.2012.03062.x. short: J. Yu, C. Wojtan, G. Turk, C. Yap, in:, Computer Graphics Forum, Wiley, 2012, pp. 815–824. conference: end_date: 2012-05-18 location: Cagliari, Sardinia, Italy name: 'EUROGRAPHICS: Conference on European Association for Computer Graphics' start_date: 2012-05-13 date_created: 2018-12-11T12:01:31Z date_published: 2012-05-01T00:00:00Z date_updated: 2023-10-16T09:54:40Z day: '01' ddc: - '000' department: - _id: ChWo doi: 10.1111/j.1467-8659.2012.03062.x file: - access_level: open_access checksum: acb325dd1e31859bedd30e013f61d0b9 content_type: application/pdf creator: system date_created: 2018-12-12T10:14:39Z date_updated: 2020-07-14T12:46:00Z file_id: '5092' file_name: IST-2016-601-v1+1_meshSPH.pdf file_size: 5740527 relation: main_file file_date_updated: 2020-07-14T12:46:00Z has_accepted_license: '1' intvolume: ' 31' issue: '2' language: - iso: eng month: '05' oa: 1 oa_version: Submitted Version page: 815 - 824 publication: Computer Graphics Forum publication_identifier: eissn: - 1467-8659 issn: - 0167-7055 publication_status: published publisher: Wiley publist_id: '3576' pubrep_id: '601' quality_controlled: '1' scopus_import: '1' status: public title: Explicit mesh surfaces for particle based fluids type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 31 year: '2012' ... --- _id: '3298' abstract: - lang: eng text: We present a new algorithm for enforcing incompressibility for Smoothed Particle Hydrodynamics (SPH) by preserving uniform density across the domain. We propose a hybrid method that uses a Poisson solve on a coarse grid to enforce a divergence free velocity field, followed by a local density correction of the particles. This avoids typical grid artifacts and maintains the Lagrangian nature of SPH by directly transferring pressures onto particles. Our method can be easily integrated with existing SPH techniques such as the incompressible PCISPH method as well as weakly compressible SPH by adding an additional force term. We show that this hybrid method accelerates convergence towards uniform density and permits a significantly larger time step compared to earlier approaches while producing similar results. We demonstrate our approach in a variety of scenarios with significant pressure gradients such as splashing liquids. 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: Greg full_name: Turk, Greg last_name: Turk citation: ama: 'Raveendran K, Wojtan C, Turk G. Hybrid smoothed particle hydrodynamics. In: Spencer S, ed. ACM; 2011:33-42. doi:10.1145/2019406.2019411' apa: 'Raveendran, K., Wojtan, C., & Turk, G. (2011). Hybrid smoothed particle hydrodynamics. In S. Spencer (Ed.) (pp. 33–42). Presented at the SCA: ACM SIGGRAPH/Eurographics Symposium on Computer animation, Vancouver, Canada: ACM. https://doi.org/10.1145/2019406.2019411' chicago: Raveendran, Karthik, Chris Wojtan, and Greg Turk. “Hybrid Smoothed Particle Hydrodynamics.” edited by Stephen Spencer, 33–42. ACM, 2011. https://doi.org/10.1145/2019406.2019411. ieee: 'K. Raveendran, C. Wojtan, and G. Turk, “Hybrid smoothed particle hydrodynamics,” presented at the SCA: ACM SIGGRAPH/Eurographics Symposium on Computer animation, Vancouver, Canada, 2011, pp. 33–42.' ista: 'Raveendran K, Wojtan C, Turk G. 2011. Hybrid smoothed particle hydrodynamics. SCA: ACM SIGGRAPH/Eurographics Symposium on Computer animation, 33–42.' mla: Raveendran, Karthik, et al. Hybrid Smoothed Particle Hydrodynamics. Edited by Stephen Spencer, ACM, 2011, pp. 33–42, doi:10.1145/2019406.2019411. short: K. Raveendran, C. Wojtan, G. Turk, in:, S. Spencer (Ed.), ACM, 2011, pp. 33–42. conference: end_date: 2011-08-07 location: Vancouver, Canada name: 'SCA: ACM SIGGRAPH/Eurographics Symposium on Computer animation' start_date: 2011-08-05 date_created: 2018-12-11T12:02:32Z date_published: 2011-08-05T00:00:00Z date_updated: 2023-02-23T11:21:05Z day: '05' ddc: - '000' department: - _id: ChWo doi: 10.1145/2019406.2019411 editor: - first_name: Stephen full_name: Spencer, Stephen last_name: Spencer file: - access_level: open_access checksum: 6579d27709946e0eefbfa60a456b4913 content_type: application/pdf creator: system date_created: 2018-12-12T10:09:44Z date_updated: 2020-07-14T12:46:06Z file_id: '4769' file_name: IST-2016-598-v1+1_HybridSPH_Preprint.pdf file_size: 2536216 relation: main_file file_date_updated: 2020-07-14T12:46:06Z has_accepted_license: '1' language: - iso: eng month: '08' oa: 1 oa_version: Submitted Version page: 33 - 42 publication_status: published publisher: ACM publist_id: '3343' pubrep_id: '598' quality_controlled: '1' scopus_import: 1 status: public title: Hybrid smoothed particle hydrodynamics type: conference user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87 year: '2011' ... --- _id: '3297' abstract: - lang: eng text: "Animating detailed liquid surfaces has always been a challenge for computer graphics researchers and visual effects artists. Over the past few years, researchers in this field have focused on mesh-based surface tracking to synthesize extremely detailed liquid surfaces as efficiently as possible. This course provides a solid understanding of the steps required to create a fluid simulator with a mesh-based liquid surface.\r\n\r\nThe course begins with an overview of several existing liquid-surface-tracking techniques and the pros and cons of each method. Then it explains how to embed a triangle mesh into a finite-difference-based fluid simulator and describes several methods for allowing the liquid surface to merge together or break apart. The final section showcases the benefits and further applications of a mesh-based liquid surface, highlighting state-of-the-art methods for tracking colors and textures, maintaining liquid volume, preserving small surface features, and simulating realistic surface-tension waves." article_number: '8' author: - 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: Matthias full_name: Müller Fischer, Matthias last_name: Müller Fischer - first_name: Tyson full_name: Brochu, Tyson last_name: Brochu citation: ama: 'Wojtan C, Müller Fischer M, Brochu T. Liquid simulation with mesh-based surface tracking. In: ACM; 2011. doi:10.1145/2037636.2037644' apa: 'Wojtan, C., Müller Fischer, M., & Brochu, T. (2011). Liquid simulation with mesh-based surface tracking. Presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Vancouver, BC, Canada: ACM. https://doi.org/10.1145/2037636.2037644' chicago: Wojtan, Chris, Matthias Müller Fischer, and Tyson Brochu. “Liquid Simulation with Mesh-Based Surface Tracking.” ACM, 2011. https://doi.org/10.1145/2037636.2037644. ieee: 'C. Wojtan, M. Müller Fischer, and T. Brochu, “Liquid simulation with mesh-based surface tracking,” presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Vancouver, BC, Canada, 2011.' ista: 'Wojtan C, Müller Fischer M, Brochu T. 2011. Liquid simulation with mesh-based surface tracking. SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, 8.' mla: Wojtan, Chris, et al. Liquid Simulation with Mesh-Based Surface Tracking. 8, ACM, 2011, doi:10.1145/2037636.2037644. short: C. Wojtan, M. Müller Fischer, T. Brochu, in:, ACM, 2011. conference: end_date: 2011-08-11 location: Vancouver, BC, Canada name: 'SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques' start_date: 2011-08-07 date_created: 2018-12-11T12:02:31Z date_published: 2011-08-07T00:00:00Z date_updated: 2023-02-23T11:21:02Z day: '07' ddc: - '000' department: - _id: ChWo doi: 10.1145/2037636.2037644 file: - access_level: open_access checksum: 8d508ad7c82f50978acbaa4170ee0a75 content_type: application/pdf creator: system date_created: 2018-12-12T10:13:34Z date_updated: 2020-07-14T12:46:06Z file_id: '5018' file_name: IST-2016-599-v1+1_meshyFluidsCourseSIGGRAPH2011.pdf file_size: 34672096 relation: main_file file_date_updated: 2020-07-14T12:46:06Z has_accepted_license: '1' language: - iso: eng month: '08' oa: 1 oa_version: Published Version publication_status: published publisher: ACM publist_id: '3344' pubrep_id: '599' quality_controlled: '1' scopus_import: 1 status: public title: Liquid simulation with mesh-based surface tracking type: conference user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87 year: '2011' ...