Controllable Caustic Animation Using Vector Fields

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dc.contributor.authorRojo, Irene Baezaen_US
dc.contributor.authorGross, Markusen_US
dc.contributor.authorGünther, Tobiasen_US
dc.contributor.editorWilkie, Alexander and Banterle, Francescoen_US
dc.date.accessioned2020-05-24T13:42:21Z
dc.date.available2020-05-24T13:42:21Z
dc.date.issued2020
dc.description.abstractIn movie production, lighting is commonly used to redirect attention or to set the mood in a scene. The detailed editing of complex lighting phenomena, however, is as tedious as it is important, especially with dynamic lights or when light is a relevant story element. In this paper, we propose a new method to create caustic animations, which are controllable through constraints drawn by the user. Our method blends caustics into a specified target image by treating photons as particles that move in a divergence-free fluid, an irrotational vector field or a linear combination of the two. Once described as a flow, additional user constraints are easily added, e.g., to direct the flow, create boundaries or add synthetic turbulence, which offers new ways to redirect and control light. The corresponding vector field is computed by fitting a stream function and a scalar potential per time step, for which constraints are described in a quadratic energy that we minimize as a linear least squares problem. Finally, photons are placed at their new positions back into the scene and are rendered with progressive photon mapping.en_US
dc.description.sectionheadersRendering I
dc.description.seriesinformationEurographics 2020 - Short Papers
dc.identifier.doi10.2312/egs.20201005
dc.identifier.isbn978-3-03868-101-4
dc.identifier.issn1017-4656
dc.identifier.pages9-12
dc.identifier.urihttps://doi.org/10.2312/egs.20201005
dc.identifier.urihttps://diglib.eg.org:443/handle/10.2312/egs20201005
dc.publisherThe Eurographics Associationen_US
dc.rightsAttribution 4.0 International License
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/]
dc.subjectComputing methodologies
dc.subjectAnimation
dc.subjectRay tracing
dc.titleControllable Caustic Animation Using Vector Fieldsen_US
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