Procedural Cloudscapes

We present a phenomenological approach for modeling and animating cloudscapes. We propose a compact procedural model for representing the different types of cloud over a range of altitudes. We define primitive‐based field functions that allow the user to control and author the cloud cover over large...

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Vydáno v:Computer graphics forum Ročník 37; číslo 2; s. 431 - 442
Hlavní autoři: Webanck, A., Cortial, Y., Guérin, E., Galin, E.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Oxford Blackwell Publishing Ltd 01.05.2018
Wiley
Témata:
CCS Concepts
Cloud cover
Clouds
Computer Science
Computer simulation
Computing methodologies → Procedural animation
Graphics
implicit surfaces
Interpolation
Morphing
procedural modeling
Shortest-path problems
Volumetric models
procedural modeling
procedural animation
clouds
implicit surfaces
morphing
volumetric models
ISSN:0167-7055, 1467-8659
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Shrnutí:We present a phenomenological approach for modeling and animating cloudscapes. We propose a compact procedural model for representing the different types of cloud over a range of altitudes. We define primitive‐based field functions that allow the user to control and author the cloud cover over large distances easily. Our approach allows us to animate cloudscapes by morphing: instead of simulating the evolution of clouds using a physically‐based simulation, we compute the movement of clouds using key‐frame interpolation and tackle the morphing problem as an Optimal Transport problem. The trajectories of the cloud cover primitives are generated by solving an Anisotropic Shortest Path problem with a cost function that takes into account the elevation of the terrain and the parameters of the wind field.
Bibliografie:ObjectType-Article-1
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ISSN:0167-7055
1467-8659
DOI:10.1111/cgf.13373