24 lines
912 B
GLSL
24 lines
912 B
GLSL
#include frex:shaders/api/vertex.glsl
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#include frex:shaders/api/world.glsl
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#include frex:shaders/lib/math.glsl
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#include frex:shaders/lib/noise/noise4d.glsl
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/******************************************************
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Based on "GPU-Generated Procedural Wind Animations for Trees"
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by Renaldas Zioma in GPU Gems 3, 2007
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https://developer.nvidia.com/gpugems/gpugems3/part-i-geometry/chapter-6-gpu-generated-procedural-wind-animations-trees
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Remake of canvas default shader for the Nether
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******************************************************/
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void frx_startVertex(inout frx_VertexData data) {
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#ifdef ANIMATED_FOLIAGE
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float t = frx_renderSeconds() * 0.05;
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vec3 pos = (data.vertex.xyz + frx_modelOriginWorldPos()) * 0.5;
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float wind = snoise(vec4(pos, t)) * 0.02;
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data.vertex.x += (cos(t) * cos(t * 3) * cos(t * 5) * cos(t * 7) + sin(t * 25)) * wind;
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data.vertex.z += sin(t * 19) * wind;
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#endif
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}
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