Eevee: Modify the raycast function to be more flexible.

Make quality a parameter, and modify the ray end to be premultiplied so that the raytrace is done on a range.

This is in order to add contact shadows.

1 files changed, 5 insertions, 2 deletions

diff --git a/source/blender/draw/engines/eevee/shaders/effect_ssr_frag.glsl b/source/blender/draw/engines/eevee/shaders/effect_ssr_frag.glsl
index 7d142e50013..7a501964fae 100644
--- a/source/blender/draw/engines/eevee/shaders/effect_ssr_frag.glsl
+++ b/source/blender/draw/engines/eevee/shaders/effect_ssr_frag.glsl
@@ -10,6 +10,9 @@ uniform sampler2DArray utilTex;
 #define BRDF_BIAS 0.7
 #define MAX_MIP 9.0
 
+uniform float fireflyFactor;
+uniform float maxRoughness;
+
 #ifdef STEP_RAYTRACE
 
 uniform sampler2D normalBuffer;
@@ -54,7 +57,7 @@ vec4 do_planar_ssr(int index, vec3 V, vec3 N, vec3 T, vec3 B, vec3 planeNormal,
 	 * below the reflection plane). This way it's garanted that the hit will
 	 * be in front of the camera. That let us tag the bad rays with a negative
 	 * sign in the Z component. */
-	vec3 hit_pos = raycast(index, viewPosition, R, 1e16, jitter, a2);
+	vec3 hit_pos = raycast(index, viewPosition, R * 1e16, 1e16, jitter, ssrQuality, a2);
 
 	return vec4(hit_pos, pdf);
 }
@@ -73,7 +76,7 @@ vec4 do_ssr(vec3 V, vec3 N, vec3 T, vec3 B, vec3 viewPosition, float a2, vec3 ra
 	vec3 R = reflect(-V, H);
 	pdf = min(1024e32, pdf); /* Theoretical limit of 16bit float */
 
-	vec3 hit_pos = raycast(-1, viewPosition, R, ssrThickness, jitter, a2);
+	vec3 hit_pos = raycast(-1, viewPosition, R * 1e16, ssrThickness, jitter, ssrQuality, a2);
 
 	return vec4(hit_pos, pdf);
 }