0026070: Ray tracing with reflections is poor on rotated presentation

[occt.git] / src / Shaders / RaytraceBase.fs

diff --git a/src/Shaders/RaytraceBase.fs b/src/Shaders/RaytraceBase.fs
index 2cc2df9..9de6f3a 100644 (file)
--- a/src/Shaders/RaytraceBase.fs
+++ b/src/Shaders/RaytraceBase.fs
@@ -927,7 +927,13 @@ vec4 Radiance (in SRay theRay, in vec3 theInverse)
       return vec4 (aResult.xyz + aWeight.xyz * aColor.xyz, aWeight.w * aColor.w);
     }
 
-    aHit.Normal = normalize (aHit.Normal);
+    vec3 aInvTransf0 = texelFetch (uSceneTransformTexture, anObjectId * 4 + 0).xyz;
+    vec3 aInvTransf1 = texelFetch (uSceneTransformTexture, anObjectId * 4 + 1).xyz;
+    vec3 aInvTransf2 = texelFetch (uSceneTransformTexture, anObjectId * 4 + 2).xyz;
+
+    aHit.Normal = normalize (vec3 (dot (aInvTransf0, aHit.Normal),
+                                   dot (aInvTransf1, aHit.Normal),
+                                   dot (aInvTransf2, aHit.Normal)));
 
     // For polygons that are parallel to the screen plane, the depth slope
     // is equal to 1, resulting in small polygon offset. For polygons that
@@ -946,10 +952,6 @@ vec4 Radiance (in SRay theRay, in vec3 theInverse)
 
     theRay.Origin += theRay.Direct * aHit.Time; // intersection point
 
-    vec3 aInvTransf0 = texelFetch (uSceneTransformTexture, anObjectId * 4 + 0).xyz;
-    vec3 aInvTransf1 = texelFetch (uSceneTransformTexture, anObjectId * 4 + 1).xyz;
-    vec3 aInvTransf2 = texelFetch (uSceneTransformTexture, anObjectId * 4 + 2).xyz;
-
     vec3 aNormal = SmoothNormal (aHit.UV, aTriIndex);
 
     aNormal = normalize (vec3 (dot (aInvTransf0, aNormal),