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54 lines
1.2 KiB
54 lines
1.2 KiB
#version 150
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uniform mat4 modelViewProjectionMatrix;
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uniform float gridSize;
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uniform vec2 resolution;
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uniform vec2 threshold;
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uniform sampler2DRect tex1;
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in vec2 texcoord;
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in vec4 position;
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out vec2 tex_c;
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void main()
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{
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tex_c = texcoord;
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// vec4 t_sample = texture(tex0, tex_c);
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float depth = pow(texture(tex1, tex_c).r, 2);
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// Normalize the depth value between 0 and 1 based on min/max
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float normalizedDepth = (depth) / threshold.y;
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vec4 displaced = position;
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displaced.z = normalizedDepth * 800.0;
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//vec2 resolution = vec2(1280.0, 960.0);
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// Transform the vertex position to clip space
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vec4 clipPos = modelViewProjectionMatrix * displaced;
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// Perform perspective division
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vec3 ndcPos = clipPos.xyz / clipPos.w;
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// Convert to screen space
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vec2 screenPos = (ndcPos.xy + 1.0) * 0.5 * resolution;
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// Snap to grid
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screenPos = floor(screenPos / gridSize) * gridSize;
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// Convert back to NDC space
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ndcPos.xy = (screenPos / resolution) * 2.0 - 1.0;
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// Reconstruct the clip space position
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clipPos = vec4(ndcPos * clipPos.w, clipPos.w);
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gl_Position = clipPos;
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//gl_Position = modelViewProjectionMatrix * position;
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}
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