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Merged the vertex and fragment shader WGSL files, because their bindings can't collide anyhow. The rain render shader now accepts a bind group of time uniforms, which change on every frame, as well as MSDF uniforms, along with an MSDF sampler and texture that's loaded in from the PNG. The shader currently renders the correct grid of quads for volumetric mode, displays the first glyph raw in each one, and every sixty frames, turns on and off the blue channel.

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Rezmason
2021-10-27 18:16:07 -07:00
parent 8c62146884
commit c716d30808
4 changed files with 166 additions and 63 deletions
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3
shaders/rainPass.frag.wgsl
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@@ -1,3 +0,0 @@
[[stage(fragment)]] fn main([[location(0)]] UV : vec2<f32>) -> [[location(0)]] vec4<f32> {
return vec4<f32>(0.0, UV, 1.0);
}

39
shaders/rainPass.vert.wgsl
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@@ -1,39 +0,0 @@
[[block]] struct Uniforms {
numColumns: i32;
numRows: i32;
};
[[binding(0), group(0)]] var<uniform> uniforms : Uniforms;
struct VertexOutput {
[[builtin(position)]] Position : vec4<f32>;
[[location(0)]] UV : vec2<f32>;
};
[[stage(vertex)]] fn main([[builtin(vertex_index)]] VertexIndex : u32) -> VertexOutput {
var i = i32(VertexIndex);
var quadIndex = i / 6;
var cornerPosition = vec2<f32>(
f32(i % 2),
f32(((i + 1) % 6 / 3))
);
var x = uniforms.numColumns;
var position = cornerPosition;
position = position + vec2<f32>(
f32(quadIndex % uniforms.numColumns),
f32(quadIndex / uniforms.numColumns)
);
position = position / vec2<f32>(
f32(uniforms.numColumns),
f32(uniforms.numRows)
);
position = position * 2.0 - 1.0;
return VertexOutput(
vec4<f32>(position, 1.0, 1.0),
cornerPosition
);
}

69
shaders/rainRenderPass.wgsl Normal file
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@@ -0,0 +1,69 @@
let PI:f32 = 3.14159265359;
let TWO_PI:f32 = 6.28318530718;
[[block]] struct Uniforms {
numColumns: i32;
numRows: i32;
};
[[group(0), binding(0)]] var<uniform> uniforms:Uniforms;
[[block]] struct MSDFUniforms {
numColumns: i32;
};
[[group(1), binding(0)]] var<uniform> msdfUniforms:MSDFUniforms;
[[group(1), binding(1)]] var msdfSampler: sampler;
[[group(1), binding(2)]] var msdfTexture: texture_2d<f32>;
[[block]] struct TimeUniforms {
time: i32;
frame: i32;
};
[[group(2), binding(0)]] var<uniform> timeUniforms:TimeUniforms;
// Vertex shader
struct VertexOutput {
[[builtin(position)]] Position:vec4<f32>;
[[location(0)]] UV:vec2<f32>;
};
[[stage(vertex)]] fn vertMain([[builtin(vertex_index)]] VertexIndex:u32) -> VertexOutput {
var i = i32(VertexIndex);
var quadIndex = i / 6;
var cornerPosition = vec2<f32>(
f32(i % 2),
f32(((i + 1) % 6 / 3))
);
var x = uniforms.numColumns;
var position = cornerPosition;
position = position + vec2<f32>(
f32(quadIndex % uniforms.numColumns),
f32(quadIndex / uniforms.numColumns)
);
position = position / vec2<f32>(
f32(uniforms.numColumns),
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),
cornerPosition
);
}
// Fragment shader
[[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 * f32(timeUniforms.frame / 60 % 2);
var time = timeUniforms.time;
return msdf;
}