37-Issue 2

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https://diglib.eg.org/handle/10.2312/2632120

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Browsing 37-Issue 2 by Subject "clouds"

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    Procedural Cloudscapes
    (The Eurographics Association and John Wiley & Sons Ltd., 2018) Webanck, Antoine; Cortial, Yann; Guérin, Eric; Galin, Eric; Gutierrez, Diego and Sheffer, Alla
    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.