36 lines
939 B
GLSL
36 lines
939 B
GLSL
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#version 150
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// OF built-in attributes.
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uniform mat4 modelViewMatrix;
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// Custom attributes.
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uniform sampler2DRect uDepthTex; // Sampler for the depth space data
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uniform sampler2DRect uWorldTex; // Transformation from kinect depth/color space to kinect world space
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uniform ivec2 uFrameSize;
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out vec4 vPosition;
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out vec2 vTexCoord;
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flat out int vValid;
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void main()
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{
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vTexCoord = vec2(gl_InstanceID % uFrameSize.x, gl_InstanceID / uFrameSize.x);
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float depth = texture(uDepthTex, vTexCoord).x;
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vec4 ray = texture(uWorldTex, vTexCoord);
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vValid = (depth != 0 && ray.x != 0 && ray.y != 0) ? 1 : 0;
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vec4 posWorld = vec4(1);
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posWorld.z = depth * 65535.0; // Remap to float range.
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posWorld.x = ray.x * posWorld.z;
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posWorld.y = ray.y * posWorld.z;
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// Flip X as OpenGL and K4A have different conventions on which direction is positive.
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posWorld.x *= -1;
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vPosition = modelViewMatrix * posWorld;
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}
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