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Karmux

Pixel Position From Linear Depth

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Hello!

I'm trying to write a deferred renderer program and would like to have some help :)
My program uses MRT (color, normals and depth). I can render linear depth texture and it looks like it should look but unfortunately I can't get correct 3D positions from linear depth (view space).

I provide you some code:
// vertex shader
gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
unpro = (gl_ModelViewMatrix * gl_Vertex).xyz;


// fragment shader
float linearize_depth(float z) {
float n = 0.001;
float f = 16.0;
return (2.0 * n) / (f + n - z * (f - n));
}
void main() {
vec3 color = texture2D(color_buffer, gl_TexCoord[0].xy).rgb;
float depth = linearize_depth(texture2D(depth_buffer, gl_TexCoord[0].xy).r);
vec3 normal = texture2D(normal_buffer, gl_TexCoord[0].xy).rgb;
vec4 position = vec4(unpro, 1) * vec4(gl_FragCoord.xy * depth, depth, 1 - depth);
position.xyz /= position.w;
gl_FragColor = position;
}



positions.png


EDIT: I updated code above and uploaded screenshot. Is it correct now? :)

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