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Adding "glint", the shapes that appear on top of the glyphs in the Resurrections opening titles.

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Rezmason
2022-09-17 01:24:23 -07:00
parent 6a3d38e965
commit 9c2d6d7ed8
17 changed files with 122 additions and 39 deletions
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28
shaders/wgsl/rainPass.wgsl
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@@ -37,6 +37,7 @@ struct Config {
slantVec : vec2<f32>,
volumetric : i32,
isolateCursor : i32,
isolateGlint : i32,
loops : i32,
highPassThreshold : f32,
};
@@ -76,7 +77,8 @@ struct CellData {
@group(0) @binding(2) var<uniform> scene : Scene;
@group(0) @binding(3) var linearSampler : sampler;
@group(0) @binding(4) var msdfTexture : texture_2d<f32>;
@group(0) @binding(5) var<storage, read> cells_RO : CellData;
@group(0) @binding(5) var glintMSDFTexture : texture_2d<f32>;
@group(0) @binding(6) var<storage, read> cells_RO : CellData;
// Shader params
@@ -401,7 +403,7 @@ fn getSymbolUV(symbol : i32) -> vec2<f32> {
return vec2<f32>(f32(symbolX), f32(symbolY));
}
fn getSymbol(cellUV : vec2<f32>, index : i32) -> f32 {
fn getSymbol(cellUV : vec2<f32>, index : i32) -> vec2<f32> {
// resolve UV to cropped position of glyph in MSDF texture
var uv = fract(cellUV * config.gridSize);
uv.y = 1.0 - uv.y; // WebGL -> WebGPU y-flip
@@ -410,10 +412,22 @@ fn getSymbol(cellUV : vec2<f32>, index : i32) -> f32 {
uv += 0.5;
uv = (uv + getSymbolUV(index)) / vec2<f32>(config.glyphTextureGridSize);
var symbol = vec2<f32>();
// MSDF: calculate brightness of fragment based on distance to shape
var dist = textureSample(msdfTexture, linearSampler, uv).rgb;
var sigDist = median3(dist) - 0.5;
return clamp(sigDist / fwidth(sigDist) + 0.5, 0.0, 1.0);
{
var dist = textureSample(msdfTexture, linearSampler, uv).rgb;
var sigDist = median3(dist) - 0.5;
symbol.r = clamp(sigDist / fwidth(sigDist) + 0.5, 0.0, 1.0);
}
if (bool(config.isolateGlint)) {
var dist = textureSample(glintMSDFTexture, linearSampler, uv).rgb;
var sigDist = median3(dist) - 0.5;
symbol.g = clamp(sigDist / fwidth(sigDist) + 0.5, 0.0, 1.0);
}
return symbol;
}
// Fragment shader
@@ -446,11 +460,11 @@ fn getSymbol(cellUV : vec2<f32>, index : i32) -> f32 {
1.0 - (cell.raindrop.r * 3.0),
1.0 - (cell.raindrop.r * 8.0)
) * (1.0 - cell.raindrop.g)
) * symbol,
) * symbol.r,
1.0
);
} else {
output.color = vec4(brightness * symbol, 0.0, 0.0);
output.color = vec4(brightness * symbol.r, brightness.r * symbol.g, 0.0);
}
var highPassColor = output.color;