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Hillshade layer #4

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kylebarron opened this issue Apr 19, 2020 · 1 comment

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kylebarron commented Apr 19, 2020

You could probably create a 2D hillshade layer simply using the existing Lighting modules.

Here normals are computed from the mesh and then passed to lighting_getLightColor. If you passed a tile of normals, from the terrain tiles, then it would be like 1 step to apply the lighting?
https://github.com/visgl/deck.gl/blob/7b3b615edb86c7a6adf9230bdcb139a58e9933d3/modules/mesh-layers/src/simple-mesh-layer/simple-mesh-layer-fragment.glsl.js#L39

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kylebarron commented Jun 19, 2020 •

edited

Multidirectional hillshade: https://pubs.usgs.gov/of/1992/of92-422/of92-422.pdf

it looks pretty simple... you compute the hillshade 4 times, add, divide by 2

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