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Improved SSAO

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This commit is contained in:
Antoine Pilote
2023-08-03 10:53:06 -04:00
parent b861935ef2
commit f5b000adc5
1 changed files with 10 additions and 7 deletions
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17
Editor/resources/Shaders/ssao.shader
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@@ -100,15 +100,19 @@ vec3 normal_from_depth(float depth, vec2 texcoords) {
void main()
{
float depth = texture(u_Depth, UV).r;
if (depth > 0.9999999f )
if (depth > 0.9999999f)
{
FragColor = vec4(0, 0, 0, 0);
return;
}
const float SCALING_NEAR = 0.9;
float depthScaler = (depth - SCALING_NEAR) * 1.0 / (1.0 - SCALING_NEAR);
depthScaler = min(max(depthScaler, 0.0), 1.0);
const float SCALING_NEAR = 0.92;
float depthScaler = (depth - SCALING_NEAR) / (1.0 - SCALING_NEAR);
const float minRadius = 0.05f;
const float maxRadius = 1.2f;
const float scalerPow = 1.8f;
depthScaler = min(max(pow(depthScaler, scalerPow), minRadius), maxRadius);
float scaledRadius = u_Radius * depthScaler;
vec3 fragPos = ViewPosFromDepth(depth);
@@ -126,12 +130,12 @@ void main()
mat3 TBN = mat3(tangent, bitangent, normal);
float occlusion = 0.0;
for(int i= 0; i < 64; i++)
for (int i = 0; i < 64; i++)
{
vec3 samplePos = TBN * u_Samples[i]; // generate a random point
samplePos.z *= -1.0f;
samplePos = fragPos + samplePos * scaledRadius;
vec4 offset = vec4(samplePos, 1.0); // make it a 4-vector
offset = v_Projection * offset; // project on the near clipping plane
offset.xyz /= offset.w; // perform perspective divide
@@ -145,5 +149,4 @@ void main()
float finalAO = pow(ao, u_Strength * 100.0);
FragColor = vec4(finalAO, finalAO, finalAO, 1.0);
//FragColor = vec4(samplePos.z, samplePos.z, samplePos.z, 1.0);
}