8df8b043ad
* shaderexp: first commit * shaderexp: further improve error handling * shaderexp: attribute ray_marching example Signed-off-by: Stephen Gutekanst <stephen@hexops.com> Co-authored-by: Stephen Gutekanst <stephen@hexops.com>
38 lines
1,023 B
WebGPU Shading Language
Executable file
38 lines
1,023 B
WebGPU Shading Language
Executable file
struct UniformBufferObject {
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resolution: vec2<f32>,
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time: f32,
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}
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@group(0) @binding(0) var<uniform> ubo : UniformBufferObject;
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@stage(fragment) fn main(
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@location(0) uv : vec2<f32>
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) -> @location(0) vec4<f32> {
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let aspect = ubo.resolution / min(ubo.resolution.x,ubo.resolution.y);
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let translated_uv = (uv - vec2(0.5,0.5)) * aspect * 2.0;
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let col = f32(mandel(translated_uv)) / 100.0;
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return vec4(vec3<f32>(col), 1.0);
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}
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fn mandel(uv: vec2<f32>) -> i32{
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let zoom = 1.0;
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let center_position = vec2<f32>(0.5,0.0);
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let mapped_point = uv * zoom - center_position;
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var z = mapped_point;
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var tmp:f32;
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var i:i32 = 0;
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var found = false;
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var res = 0;
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loop {
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if (i >= 100){
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break;
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}
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tmp = z.x;
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z.x = z.x * z.x - z.y * z.y + mapped_point.x;
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z.y = 2. * tmp * z.y + mapped_point.y;
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found = found || (z.x * z.x + z.y * z.y > 16.);
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res = res + 1 * i32(!found);
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i = i + 1;
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}
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return res;
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}
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