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Freeing up a rain pass channel

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Rezmason
2022-09-06 23:23:39 -07:00
parent c1fa822299
commit 76d37fc752
6 changed files with 28 additions and 20 deletions
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15
shaders/glsl/rainPass.frag.glsl
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@@ -18,15 +18,21 @@ uniform bool volumetric;
varying vec2 vUV;
varying vec3 vChannel;
varying vec4 vGlyph;
varying float vDepth;
float median3(vec3 i) {
return max(min(i.r, i.g), min(max(i.r, i.g), i.b));
}
float modI(float a, float b) {
float m = a - floor((a + 0.5) / b) * b;
return floor(m + 0.5);
}
vec2 getSymbolUV(float glyphCycle) {
float symbol = floor((glyphSequenceLength) * glyphCycle) + 1.0;
float symbolX = mod(symbol, glyphTextureGridSize.x);
float symbolY = mod(floor(symbol / glyphTextureGridSize.x), glyphTextureGridSize.y);
float symbol = floor((glyphSequenceLength) * glyphCycle);
float symbolX = modI(symbol, glyphTextureGridSize.x);
float symbolY = (symbol - symbolX) / glyphTextureGridSize.x;
symbolY = glyphTextureGridSize.y - symbolY - 1.0;
return vec2(symbolX, symbolY);
}
@@ -59,13 +65,12 @@ void main() {
vec4 glyph = volumetric ? vGlyph : texture2D(state, uv);
float brightness = glyph.r;
vec2 symbolUV = getSymbolUV(glyph.g);
float quadDepth = glyph.b;
float effect = glyph.a;
brightness = max(effect, brightness);
// In volumetric mode, distant glyphs are dimmer
if (volumetric) {
brightness = brightness * min(1.0, quadDepth);
brightness = brightness * min(1.0, vDepth);
}
// resolve UV to cropped position of glyph in MSDF texture