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A little bit of shader variable renaming and const declaration during a walkthrough of the existing code on-stream

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Rezmason
2021-10-27 20:00:39 -07:00
parent c716d30808
commit f2a54b3141
2 changed files with 10 additions and 8 deletions
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14
shaders/rainRenderPass.wgsl
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@@ -1,5 +1,6 @@
let NUM_VERTICES_PER_QUAD:i32 = 6;
let PI:f32 = 3.14159265359;
let TWO_PI:f32 = 6.28318530718;
let TWO_PI:f32 = 6.28318530718; // No, I'm not using Tau.
[[block]] struct Uniforms {
numColumns: i32;
@@ -15,7 +16,7 @@ let TWO_PI:f32 = 6.28318530718;
[[group(1), binding(2)]] var msdfTexture: texture_2d<f32>;
[[block]] struct TimeUniforms {
time: i32;
now: i32;
frame: i32;
};
[[group(2), binding(0)]] var<uniform> timeUniforms:TimeUniforms;
@@ -30,11 +31,11 @@ struct VertexOutput {
[[stage(vertex)]] fn vertMain([[builtin(vertex_index)]] VertexIndex:u32) -> VertexOutput {
var i = i32(VertexIndex);
var quadIndex = i / 6;
var quadIndex = i / NUM_VERTICES_PER_QUAD;
var cornerPosition = vec2<f32>(
f32(i % 2),
f32(((i + 1) % 6 / 3))
f32(((i + 1) % NUM_VERTICES_PER_QUAD / 3))
);
var x = uniforms.numColumns;
@@ -49,7 +50,6 @@ struct VertexOutput {
f32(uniforms.numRows)
);
position = 1.0 - position * 2.0;
// position.x = position.x + f32(quadIndex) * 0.01;
return VertexOutput(
vec4<f32>(position, 1.0, 1.0),
@@ -61,9 +61,9 @@ struct VertexOutput {
[[stage(fragment)]] fn fragMain([[location(0)]] UV:vec2<f32>) -> [[location(0)]] vec4<f32> {
var msdf:vec4<f32> = textureSample(msdfTexture, msdfSampler, UV / f32(msdfUniforms.numColumns));
// msdf.b = msdf.b * (sin(f32(timeUniforms.time) / 1000.0 * TWO_PI) * 0.5 + 0.5);
// msdf.b = msdf.b * (sin(f32(timeUniforms.now) / 1000.0 * TWO_PI) * 0.5 + 0.5);
msdf.b = msdf.b * f32(timeUniforms.frame / 60 % 2);
var time = timeUniforms.time;
var now = timeUniforms.now;
return msdf;
}