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Ported the rain fragment shader to wgsl. Made a small change in both to the function that resolves the glyph symbol float to the coordinate of a glyph in the MSDF texture.

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Rezmason
2021-10-30 14:44:09 -07:00
parent 4dd0c1be50
commit 923992660c
2 changed files with 82 additions and 16 deletions
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9
shaders/glsl/rainPass.frag.glsl
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@@ -22,11 +22,11 @@ float median3(vec3 i) {
return max(min(i.r, i.g), min(max(i.r, i.g), i.b));
}
float getSymbolIndex(float glyphCycle) {
vec2 getSymbolUV(float glyphCycle) {
float symbol = floor(glyphSequenceLength * glyphCycle);
float symbolX = mod(symbol, glyphTextureColumns);
float symbolY = ((glyphTextureColumns - 1.0) - (symbol - symbolX) / glyphTextureColumns);
return symbolY * glyphTextureColumns + symbolX;
return vec2(symbolX, symbolY);
}
void main() {
@@ -56,7 +56,7 @@ void main() {
// Unpack the values from the data texture
vec4 glyph = volumetric ? vGlyph : texture2D(state, uv);
float brightness = glyph.r;
float symbolIndex = getSymbolIndex(glyph.g);
vec2 symbolUV = getSymbolUV(glyph.g);
float quadDepth = glyph.b;
float effect = glyph.a;
@@ -66,8 +66,7 @@ void main() {
brightness = brightness * min(1.0, quadDepth);
}
// resolve UV to position of glyph in MSDF texture
vec2 symbolUV = vec2(mod(symbolIndex, glyphTextureColumns), floor(symbolIndex / glyphTextureColumns));
// resolve UV to cropped position of glyph in MSDF texture
vec2 glyphUV = fract(uv * vec2(numColumns, numRows));
glyphUV -= 0.5;
glyphUV *= clamp(1.0 - glyphEdgeCrop, 0.0, 1.0);