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/* Convert depth to Mist factor */
uniform vec3 mistSettings;
#define mistStart mistSettings.x
#define mistInvDistance mistSettings.y
#define mistFalloff mistSettings.z
out vec4 fragColor;
void main()
{
vec2 texel_size = 1.0 / vec2(textureSize(depthBuffer, 0)).xy;
vec2 uvs = gl_FragCoord.xy * texel_size;
float depth = textureLod(depthBuffer, uvs, 0.0).r;
vec3 co = get_view_space_from_depth(uvs, depth);
float zcor = (ProjectionMatrix[3][3] == 0.0) ? length(co) : -co.z;
/* bring depth into 0..1 range */
float mist = saturate((zcor - mistStart) * mistInvDistance);
/* falloff */
mist = pow(mist, mistFalloff);
fragColor = vec4(mist);
// if (mist > 0.999) fragColor = vec4(1.0);
// else if (mist > 0.0001) fragColor = vec4(0.5);
// else fragColor = vec4(0.0);
}
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