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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,136 @@ | ||
| struct Config { | ||
| seg1: f32, | ||
| shoulder: f32, | ||
| }; | ||
|
|
||
| @group(0) @binding(0) var mainSampler: sampler; | ||
| @group(0) @binding(1) var mainTexture: texture_2d<f32>; | ||
| @group(0) @binding(2) var<uniform> config: Config; | ||
|
|
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| struct Result { | ||
| head_x: f32, | ||
| head_y: f32, | ||
| head_z: f32, | ||
| body_pos_x: f32, | ||
| body_pos_y: f32, | ||
| body_rot_x: f32, | ||
| body_rot_z: f32, | ||
| }; | ||
|
|
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| @group(1) @binding(0) var<uniform> result: Result; | ||
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| struct VertexOutput { | ||
| @builtin(position) position: vec4<f32>, | ||
| @location(0) texcoord: vec2<f32>, | ||
| rotate: bool, | ||
| }; | ||
|
|
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| @vertex fn vertex_main( | ||
| @builtin(vertex_index) VertexIndex : u32 | ||
| ) -> VertexOutput { | ||
| var uvSeg1 = config.seg1 * 2 - 1; | ||
|
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||
| var pos = array<vec2<f32>, 6>( | ||
| // Seg 1 | ||
| vec2<f32>(-1.0, -1.0), // ↙ | ||
| vec2<f32>(1.0, -1.0), // ↘ | ||
| //vec2<f32>(-1.0, uvSeg1), // ↖ | ||
| //vec2<f32>(-1.0, uvSeg1), // ↖ | ||
| //vec2<f32>(1.0, -1.0), // ↘ | ||
| //vec2<f32>(1.0, uvSeg1), // ↗ | ||
| vec2<f32>(-1.0, 1), // ↖ | ||
|
|
||
| // Seg 2 | ||
| //vec2<f32>(-1.0, uvSeg1), // ↙ | ||
| //vec2<f32>(1.0, uvSeg1), // ↘ | ||
| vec2<f32>(-1.0, 1), // ↖ | ||
| //vec2<f32>(-1.0, 1), // ↖ | ||
| //vec2<f32>(1.0, uvSeg1), // ↘ | ||
| vec2<f32>(1.0, 1), // ↗ | ||
| vec2<f32>(1.0, -1.0), // ↘ | ||
| ); | ||
|
|
||
| var vsOutput: VertexOutput; | ||
| let xy = pos[VertexIndex]; | ||
|
|
||
| vsOutput.texcoord = xy; | ||
| vsOutput.position = vec4<f32>(xy, 0.0, 1.0); | ||
| vsOutput.rotate = VertexIndex > 5; | ||
| return vsOutput; | ||
| } | ||
|
|
||
| fn stage1(p: vec3<f32>) -> vec3<f32>{ | ||
| var y = (config.seg1) * 2 - 1; | ||
| if (p.y < y) { | ||
| return p; | ||
| } | ||
| var r = result.head_x + result.body_rot_x; | ||
|
|
||
| var a = atan2(p.y - y, p.x); | ||
| var l = length(vec2<f32>(p.x, p.y - y)); | ||
| var t = a - r * (1 - pow(2.718281828459045, - (p.y - y) * 4)) * 0.4; | ||
| return vec3<f32>(l * cos(t), l * sin(t) + y, p.z); | ||
| } | ||
|
|
||
| fn stage2(p: vec3<f32>) -> vec3<f32>{ | ||
| var y = (config.seg1) * 2 - 1; | ||
| var r = result.head_y; | ||
|
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||
| var t = 1.5 * r / (1 + pow(2.718281828459045, -18 * (p.y - y))); //(1 - pow(2.718281828459045, - (p.y - y) * 12)); | ||
| //return vec3<f32>(p.x, p.y, 0.3 * sin(t)); | ||
| return vec3<f32>(p.x, (p.y - y) / cos(t) + y, sin(t)); | ||
| } | ||
|
|
||
| fn stage3(p: vec3<f32>) -> vec3<f32>{ | ||
| var y = (config.seg1) * 2 - 1; | ||
| var r = result.head_z;// + result.body_rot_z; | ||
|
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||
| var t = r * 0.8 / (1 + pow(2.718281828459045, -18 * (p.y - y)));//(1 - pow(2.718281828459045, - (p.y - y) * 12)) * r; | ||
| return vec3<f32>(p.x / cos(t), p.y, p.z * sin(t)); | ||
| } | ||
|
|
||
| fn stage4(p: vec3<f32>) -> vec3<f32>{ | ||
| var r = result.body_rot_z; | ||
| return vec3<f32>(p.x / cos(r) + p.z * sin(r), p.y, 0); | ||
| } | ||
|
|
||
| fn stage5(p: vec3<f32>) -> vec3<f32>{ | ||
| var r = result.body_rot_x; | ||
| var shoulderUV = config.shoulder * 2 - 1; | ||
| return vec3<f32>(p.x * cos(r) - (p.y - shoulderUV) * sin(r), p.x * sin(r) + (p.y - shoulderUV) * cos(r) + shoulderUV, 0); | ||
| } | ||
|
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||
| fn toTexCoord(xy: vec2<f32>) -> vec2<f32> { | ||
| return xy * vec2<f32>(0.5, -0.5) + 0.5; | ||
| } | ||
|
|
||
| @fragment fn frag_main(fsInput: VertexOutput) -> @location(0) vec4<f32> { | ||
| var coord = vec3<f32>(fsInput.texcoord, 0); | ||
|
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| // Stage 1: head x | ||
| coord = stage1(coord); | ||
|
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| // Stage 2: head y | ||
| coord = stage2(coord); | ||
|
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| // Stage 3: head z | ||
| coord = stage3(coord); | ||
|
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| // Stage 4: body rotate z | ||
| coord = stage4(coord); | ||
|
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| // Stage 5: body rotate x | ||
| coord = stage5(coord); | ||
|
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| // Stage 6: transform | ||
| coord = coord + vec3<f32>(result.body_pos_x, result.body_pos_y, 0); | ||
|
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| // Squash to 2d | ||
| var texcoord = vec2<f32>(coord.x, coord.y); | ||
|
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| // convert the coordinate | ||
| texcoord = toTexCoord(texcoord); | ||
|
|
||
| // Render output | ||
| return textureSample(mainTexture, mainSampler, texcoord); | ||
| } |
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