--- _id: '5558' abstract: - lang: eng text: PhD thesis LaTeX source code article_processing_charge: No author: - first_name: Morten full_name: Bojsen-Hansen, Morten id: 439F0C8C-F248-11E8-B48F-1D18A9856A87 last_name: Bojsen-Hansen orcid: 0000-0002-4417-3224 citation: ama: Bojsen-Hansen M. Tracking, Correcting and Absorbing Water Surface Waves. 2016. doi:10.15479/AT:ISTA:48 apa: Bojsen-Hansen, M. (2016). Tracking, Correcting and Absorbing Water Surface Waves. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:48 chicago: Bojsen-Hansen, Morten. “Tracking, Correcting and Absorbing Water Surface Waves.” Institute of Science and Technology Austria, 2016. https://doi.org/10.15479/AT:ISTA:48. ieee: M. Bojsen-Hansen, “Tracking, Correcting and Absorbing Water Surface Waves.” Institute of Science and Technology Austria, 2016. ista: Bojsen-Hansen M. 2016. Tracking, Correcting and Absorbing Water Surface Waves, Institute of Science and Technology Austria, 10.15479/AT:ISTA:48. mla: Bojsen-Hansen, Morten. Tracking, Correcting and Absorbing Water Surface Waves. Institute of Science and Technology Austria, 2016, doi:10.15479/AT:ISTA:48. short: M. Bojsen-Hansen, (2016). datarep_id: '48' date_created: 2018-12-12T12:31:31Z date_published: 2016-09-23T00:00:00Z date_updated: 2024-02-21T13:50:48Z day: '23' ddc: - '004' department: - _id: ChWo doi: 10.15479/AT:ISTA:48 file: - access_level: open_access checksum: 5b1b256ad796fbddb4b7729f5e45e444 content_type: application/x-bzip2 creator: system date_created: 2018-12-12T13:02:18Z date_updated: 2020-07-14T12:47:02Z file_id: '5589' file_name: IST-2016-48-v1+1_2016_Bojsen-Hansen_TCaAWSW.tar.bz2 file_size: 55237885 relation: main_file file_date_updated: 2020-07-14T12:47:02Z has_accepted_license: '1' license: https://creativecommons.org/licenses/by/4.0/ month: '09' oa: 1 oa_version: Published Version publisher: Institute of Science and Technology Austria publist_id: '6238' pubrep_id: '640' related_material: record: - id: '1122' relation: other status: public status: public title: Tracking, Correcting and Absorbing Water Surface Waves tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: research_data user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2016' ... --- _id: '1634' abstract: - lang: eng text: Simulating the delightful dynamics of soap films, bubbles, and foams has traditionally required the use of a fully three-dimensional many-phase Navier-Stokes solver, even though their visual appearance is completely dominated by the thin liquid surface. We depart from earlier work on soap bubbles and foams by noting that their dynamics are naturally described by a Lagrangian vortex sheet model in which circulation is the primary variable. This leads us to derive a novel circulation-preserving surface-only discretization of foam dynamics driven by surface tension on a non-manifold triangle mesh. We represent the surface using a mesh-based multimaterial surface tracker which supports complex bubble topology changes, and evolve the surface according to the ambient air flow induced by a scalar circulation field stored on the mesh. Surface tension forces give rise to a simple update rule for circulation, even at non-manifold Plateau borders, based on a discrete measure of signed scalar mean curvature. We further incorporate vertex constraints to enable the interaction of soap films with wires. The result is a method that is at once simple, robust, and efficient, yet able to capture an array of soap films behaviors including foam rearrangement, catenoid collapse, blowing bubbles, and double bubbles being pulled apart. article_number: '149' author: - first_name: Fang full_name: Da, Fang last_name: Da - first_name: Christopher full_name: Batty, Christopher last_name: Batty - 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: Eitan full_name: Grinspun, Eitan last_name: Grinspun citation: ama: 'Da F, Batty C, Wojtan C, Grinspun E. Double bubbles sans toil and trouble: discrete circulation-preserving vortex sheets for soap films and foams. In: Vol 34. ACM; 2015. doi:10.1145/2767003' apa: 'Da, F., Batty, C., Wojtan, C., & Grinspun, E. (2015). Double bubbles sans toil and trouble: discrete circulation-preserving vortex sheets for soap films and foams (Vol. 34). Presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, United States: ACM. https://doi.org/10.1145/2767003' chicago: 'Da, Fang, Christopher Batty, Chris Wojtan, and Eitan Grinspun. “Double Bubbles sans Toil and Trouble: Discrete Circulation-Preserving Vortex Sheets for Soap Films and Foams,” Vol. 34. ACM, 2015. https://doi.org/10.1145/2767003.' ieee: 'F. Da, C. Batty, C. Wojtan, and E. Grinspun, “Double bubbles sans toil and trouble: discrete circulation-preserving vortex sheets for soap films and foams,” presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, United States, 2015, vol. 34, no. 4.' ista: 'Da F, Batty C, Wojtan C, Grinspun E. 2015. Double bubbles sans toil and trouble: discrete circulation-preserving vortex sheets for soap films and foams. SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques vol. 34, 149.' mla: 'Da, Fang, et al. Double Bubbles sans Toil and Trouble: Discrete Circulation-Preserving Vortex Sheets for Soap Films and Foams. Vol. 34, no. 4, 149, ACM, 2015, doi:10.1145/2767003.' short: F. Da, C. Batty, C. Wojtan, E. Grinspun, 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: 2023-02-23T10:07:42Z day: '27' ddc: - '000' department: - _id: ChWo doi: 10.1145/2767003 ec_funded: 1 file: - access_level: open_access checksum: 57b07d78d2d612a8052744b37d4a71fa content_type: application/pdf creator: system date_created: 2018-12-12T10:11:14Z date_updated: 2020-07-14T12:45:07Z file_id: '4867' file_name: IST-2016-608-v1+1_doublebubbles.pdf file_size: 8973215 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: '5521' pubrep_id: '608' quality_controlled: '1' scopus_import: 1 status: public title: 'Double bubbles sans toil and trouble: discrete circulation-preserving vortex sheets for soap films and foams' type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 34 year: '2015' ... --- _id: '1632' abstract: - lang: eng text: "This paper presents a liquid simulation technique that enforces the incompressibility condition using a stream function solve instead of a pressure projection. Previous methods have used stream function techniques for the simulation of detailed single-phase flows, but a formulation for liquid simulation has proved elusive in part due to the free surface boundary conditions. In this paper, we introduce a stream function approach to liquid simulations with novel boundary conditions for free surfaces, solid obstacles, and solid-fluid coupling.\r\n\r\nAlthough our approach increases the dimension of the linear system necessary to enforce incompressibility, it provides interesting and surprising benefits. First, the resulting flow is guaranteed to be divergence-free regardless of the accuracy of the solve. Second, our free-surface boundary conditions guarantee divergence-free motion even in the un-simulated air phase, which enables two-phase flow simulation by only computing a single phase. We implemented this method using a variant of FLIP simulation which only samples particles within a narrow band of the liquid surface, and we illustrate the effectiveness of our method for detailed two-phase flow simulations with complex boundaries, detailed bubble interactions, and two-way solid-fluid coupling." acknowledgement: The first author was supported by a JSPS Postdoctoral Fellowship for Research Abroad. This work was also supported by the ERC projects ERC-2014-StG-637014 realFlow and ERC-2014- StG-638176 BigSplash. alternative_title: - ACM Transactions on Graphics article_number: '53' 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. A stream function solver for liquid simulations. In: Vol 34. ACM; 2015. doi:10.1145/2766935' apa: 'Ando, R., Thuerey, N., & Wojtan, C. (2015). A stream function solver for liquid simulations (Vol. 34). Presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, USA: ACM. https://doi.org/10.1145/2766935' chicago: Ando, Ryoichi, Nils Thuerey, and Chris Wojtan. “A Stream Function Solver for Liquid Simulations,” Vol. 34. ACM, 2015. https://doi.org/10.1145/2766935. ieee: 'R. Ando, N. Thuerey, and C. Wojtan, “A stream function solver for liquid simulations,” presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, USA, 2015, vol. 34, no. 4.' ista: 'Ando R, Thuerey N, Wojtan C. 2015. A stream function solver for liquid simulations. SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, ACM Transactions on Graphics, vol. 34, 53.' mla: Ando, Ryoichi, et al. A Stream Function Solver for Liquid Simulations. Vol. 34, no. 4, 53, ACM, 2015, doi:10.1145/2766935. short: R. Ando, N. Thuerey, C. Wojtan, in:, ACM, 2015. conference: end_date: 2015-08-13 location: Los Angeles, CA, USA 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: 2023-02-23T10:07:37Z day: '27' ddc: - '000' department: - _id: ChWo doi: 10.1145/2766935 file: - access_level: open_access checksum: 7a9afdfaba9209157ce19376e15bc90b content_type: application/pdf creator: system date_created: 2018-12-12T10:11:52Z date_updated: 2020-07-14T12:45:07Z file_id: '4909' file_name: IST-2016-610-v1+1_vecpotential.pdf file_size: 21831121 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 publication_status: published publisher: ACM publist_id: '5523' pubrep_id: '610' quality_controlled: '1' scopus_import: 1 status: public title: A stream function solver for liquid simulations type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 34 year: '2015' ... --- _id: '1630' abstract: - lang: eng text: We present a method to learn and propagate shape placements in 2D polygonal scenes from a few examples provided by a user. The placement of a shape is modeled as an oriented bounding box. Simple geometric relationships between this bounding box and nearby scene polygons define a feature set for the placement. The feature sets of all example placements are then used to learn a probabilistic model over all possible placements and scenes. With this model, we can generate a new set of placements with similar geometric relationships in any given scene. We introduce extensions that enable propagation and generation of shapes in 3D scenes, as well as the application of a learned modeling session to large scenes without additional user interaction. These concepts allow us to generate complex scenes with thousands of objects with relatively little user interaction. acknowledgement: This publication is based upon work supported by the KAUST Office of Competitive Research Funds (OCRF) under Award No. 62140401, the KAUST Visual Computing Center and the Austrian Science Fund (FWF) projects DEEP PICTURES (no. P24352-N23) and Data-Driven Procedural Modeling of Interiors (no. P24600-N23). article_number: '108' 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. Learning shape placements by example. In: Vol 34. ACM; 2015. doi:10.1145/2766933' apa: 'Guerrero, P., Jeschke, S., Wimmer, M., & Wonka, P. (2015). Learning shape placements by example (Vol. 34). Presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, United States: ACM. https://doi.org/10.1145/2766933' chicago: Guerrero, Paul, Stefan Jeschke, Michael Wimmer, and Peter Wonka. “Learning Shape Placements by Example,” Vol. 34. ACM, 2015. https://doi.org/10.1145/2766933. ieee: 'P. Guerrero, S. Jeschke, M. Wimmer, and P. Wonka, “Learning shape placements by example,” presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, United States, 2015, vol. 34, no. 4.' ista: 'Guerrero P, Jeschke S, Wimmer M, Wonka P. 2015. Learning shape placements by example. SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques vol. 34, 108.' mla: Guerrero, Paul, et al. Learning Shape Placements by Example. Vol. 34, no. 4, 108, ACM, 2015, doi:10.1145/2766933. short: P. Guerrero, S. Jeschke, M. Wimmer, P. Wonka, 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: 2018-12-11T11:53:08Z date_published: 2015-07-27T00:00:00Z date_updated: 2021-01-12T06:52:07Z day: '27' ddc: - '000' department: - _id: ChWo doi: 10.1145/2766933 file: - access_level: open_access checksum: 8b05a51e372c9b0b5af9a00098a9538b content_type: application/pdf creator: system date_created: 2018-12-12T10:07:49Z date_updated: 2020-07-14T12:45:07Z file_id: '4647' file_name: IST-2016-576-v1+1_guerrero-2015-lsp-paper.pdf file_size: 11902290 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: 25357BD2-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: P 24352-N23 name: 'Deep Pictures: Creating Visual and Haptic Vector Images' publication_status: published publisher: ACM publist_id: '5525' pubrep_id: '576' quality_controlled: '1' scopus_import: 1 status: public title: Learning shape placements by example type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 34 year: '2015' ... --- _id: '1735' abstract: - lang: eng text: This work presents a method for efficiently simplifying the pressure projection step in a liquid simulation. We first devise a straightforward dimension reduction technique that dramatically reduces the cost of solving the pressure projection. Next, we introduce a novel change of basis that satisfies free-surface boundary conditions exactly, regardless of the accuracy of the pressure solve. When combined, these ideas greatly reduce the computational complexity of the pressure solve without compromising free surface boundary conditions at the highest level of detail. Our techniques are easy to parallelize, and they effectively eliminate the computational bottleneck for large liquid simulations. acknowledgement: The first author was supported by a JSPS Postdoctoral Fellowship for Research Abroad author: - first_name: Ryoichi full_name: Ando, Ryoichi last_name: Ando - first_name: Nils full_name: Thürey, Nils last_name: Thürey - 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, Thürey N, Wojtan C. A dimension-reduced pressure solver for liquid simulations. Computer Graphics Forum. 2015;34(2):473-480. doi:10.1111/cgf.12576 apa: Ando, R., Thürey, N., & Wojtan, C. (2015). A dimension-reduced pressure solver for liquid simulations. Computer Graphics Forum. Wiley. https://doi.org/10.1111/cgf.12576 chicago: Ando, Ryoichi, Nils Thürey, and Chris Wojtan. “A Dimension-Reduced Pressure Solver for Liquid Simulations.” Computer Graphics Forum. Wiley, 2015. https://doi.org/10.1111/cgf.12576. ieee: R. Ando, N. Thürey, and C. Wojtan, “A dimension-reduced pressure solver for liquid simulations,” Computer Graphics Forum, vol. 34, no. 2. Wiley, pp. 473–480, 2015. ista: Ando R, Thürey N, Wojtan C. 2015. A dimension-reduced pressure solver for liquid simulations. Computer Graphics Forum. 34(2), 473–480. mla: Ando, Ryoichi, et al. “A Dimension-Reduced Pressure Solver for Liquid Simulations.” Computer Graphics Forum, vol. 34, no. 2, Wiley, 2015, pp. 473–80, doi:10.1111/cgf.12576. short: R. Ando, N. Thürey, C. Wojtan, Computer Graphics Forum 34 (2015) 473–480. date_created: 2018-12-11T11:53:44Z date_published: 2015-05-01T00:00:00Z date_updated: 2023-02-23T10:12:11Z day: '01' ddc: - '000' department: - _id: ChWo doi: 10.1111/cgf.12576 file: - access_level: open_access checksum: 590752bf977855b337a80f78a9bc2404 content_type: application/pdf creator: system date_created: 2018-12-12T10:16:30Z date_updated: 2020-07-14T12:45:15Z file_id: '5218' file_name: IST-2016-607-v1+1_coarsegrid.pdf file_size: 6312352 relation: main_file file_date_updated: 2020-07-14T12:45:15Z has_accepted_license: '1' intvolume: ' 34' issue: '2' language: - iso: eng month: '05' oa: 1 oa_version: Submitted Version page: 473 - 480 publication: Computer Graphics Forum publication_status: published publisher: Wiley publist_id: '5389' pubrep_id: '607' quality_controlled: '1' scopus_import: 1 status: public title: A dimension-reduced pressure solver for liquid simulations type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 34 year: '2015' ...