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Improved SSAO

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Fixed distance check
Improved Halo artefacts
Better default values
This commit is contained in:
Antoine Pilote
2023-07-02 16:32:53 -04:00
parent 0e1c83461b
commit abc93cf799
3 changed files with 26 additions and 27 deletions
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37
Editor/resources/Shaders/ssao.shader
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@@ -93,7 +93,7 @@ void main()
{
float depth = texture(u_Depth, UV).r ;
vec3 fragPos = ViewPosFromDepth(depth);
float normalizedRadius = u_Radius;
if(depth > 0.9999999f)
{
FragColor = vec4(0, 0, 0, 0);
@@ -106,34 +106,31 @@ void main()
normal = normalT.xyz;
normal = normalize(normal);
normal = goodNormal;
normal = normalT.xyz;
vec3 randomVec = texture(u_Noise, UV * u_NoiseScale).xyz;
float radius_depth = u_Radius/depth;
float radius_depth = normalizedRadius / depth;
float occlusion = 0.0;
vec3 position = vec3(UV, depth);
int skipped = 0;
float rangeCheckC = 0.0f;
for(int i=0; i < 64; i++)
{
vec3 ray = radius_depth * reflect(u_Samples[i], randomVec);
/*
if(dot(normal, normalize(ray)) < u_Falloff)
{
skipped++;
continue;
}*/
vec3 ray = u_Radius * reflect(u_Samples[i], randomVec);
vec3 hemi_ray = position + sign(dot(ray, normal)) * ray;
float occ_depth = texture(u_Depth, hemi_ray.xy).r;
float difference = depth - occ_depth + u_Bias;
float rangeCheck = smoothstep(0.0, 1.0, u_Radius * 10.0 / abs(depth - occ_depth));
//float rangeCheck = abs(depth - occ_depth) < u_Radius ? 1.0 : 0.0;
occlusion += ( occ_depth <= hemi_ray.z - u_Bias ? 1.0 : 0.0) * rangeCheck;
float sampleDepth = texture(u_Depth, hemi_ray.xy).r;
float rangeCheck = smoothstep(0.0, 1.0, u_Radius * 0.8 / abs(depth - sampleDepth));
float ao = hemi_ray.z >= sampleDepth + u_Bias ? 1.0 : 0.0;
occlusion += ao * rangeCheck;
rangeCheckC += rangeCheck;
}
float ao = 1.0 - u_Strength * occlusion * (1.0 / (64 ));
float ao = 1.0 - (occlusion / 64.0);
rangeCheckC /= 64.0;
FragColor = vec4(ao, ao, ao , 1.0);
float finalAO = pow(ao, u_Strength);
FragColor = vec4(finalAO, finalAO, finalAO, 1.0);
//FragColor = vec4(rangeCheckC, rangeCheckC, rangeCheckC, 1.0);
//FragColor = vec4(1.0, 1.0, 1.0, 1.0);
}