61 lines
1.6 KiB
GLSL
61 lines
1.6 KiB
GLSL
#[compute]
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#version 450
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#define FLT_MAX 3.402823466e+38
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#define FLT_MIN 1.175494351e-38
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layout(set = 0, binding = 0) uniform sampler2D velocity_sampler;
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layout(rgba16f, set = 0, binding = 1) uniform writeonly image2D tile_max_x;
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layout(push_constant, std430) uniform Params
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{
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float nan5;
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float nan6;
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float nan7;
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float nan8;
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int tile_size;
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int nan2;
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int nan3;
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int nan4;
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} params;
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layout(local_size_x = 16, local_size_y = 16, local_size_z = 1) in;
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void main()
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{
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ivec2 render_size = ivec2(textureSize(velocity_sampler, 0));
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ivec2 output_size = imageSize(tile_max_x);
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ivec2 uvi = ivec2(gl_GlobalInvocationID.xy);
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int tile_size = render_size.x / output_size.x;
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ivec2 global_uvi = uvi * ivec2(tile_size, 1);
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if ((uvi.x >= output_size.x) || (uvi.y >= output_size.y) || (global_uvi.x >= render_size.x) || (global_uvi.y >= render_size.y))
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{
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return;
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}
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vec2 uvn = (vec2(global_uvi) + vec2(0.5)) / render_size;
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vec4 max_velocity = vec4(0);
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float max_velocity_length = -1;
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//bool foreground = false;
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for(int i = 0; i < tile_size; i++)
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{
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vec2 current_uv = uvn + vec2(float(i) / render_size.x, 0);
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vec4 velocity_sample = textureLod(velocity_sampler, current_uv, 0.0);
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float current_velocity_length = dot(velocity_sample.xy, velocity_sample.xy);
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if(current_velocity_length > max_velocity_length)// || (velocity_sample.w > 0 && !foreground))
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{
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max_velocity_length = current_velocity_length;
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max_velocity = vec4(velocity_sample);
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// if(velocity_sample.w > 0)
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// {
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// foreground = true;
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// }
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}
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}
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imageStore(tile_max_x, uvi, max_velocity);
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} |