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Fix: EEVEE: AO: Only clip occluders based on front sample

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This is cheaper but avoid loosing the sample influence when
thickness is large.
This commit is contained in:
Clément Foucault 2024-06-18 17:27:11 +02:00
parent 3112799804
commit 90c1d5832e
1 changed files with 4 additions and 8 deletions
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12
source/blender/draw/engines/eevee_next/shaders/eevee_horizon_scan_eval_lib.glsl
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@ -156,16 +156,12 @@ HorizonScanResult horizon_scan_eval(vec3 vP,
const float bias = 2.0 * 2.4e-7;
sample_depth += reversed ? -bias : bias;
vec3 vP_sample = drw_point_screen_to_view(vec3(sample_uv, sample_depth));
vec3 vP_sample_front = drw_point_screen_to_view(vec3(sample_uv, sample_depth));
vec3 vP_sample_back = vP_sample_front - vV * thickness_near;
float sample_distance;
vec3 vL_front = normalize_and_get_length(vP_sample - vP, sample_distance);
if (sample_distance > search_distance) {
continue;
}
vec3 vL_back = normalize_and_get_length((vP_sample - vV * thickness_near) - vP,
sample_distance);
vec3 vL_front = normalize_and_get_length(vP_sample_front - vP, sample_distance);
vec3 vL_back = normalize(vP_sample_back - vP);
if (sample_distance > search_distance) {
continue;
}