Make correct usage of frame for imageStore

hu18yuanwai · Nov 23, 2022 · 003bab4 · 003bab4
1 parent 9ed7600
commit 003bab4
Showing 1 changed file with 7 additions and 7 deletions.
diff --git a/ray_tracing__advance/shaders/raytrace.rgen b/ray_tracing__advance/shaders/raytrace.rgen
@@ -104,16 +104,16 @@ void main()
   }
   prd.hitValue = hitValues / NBSAMPLES;
 
-  // Do accumulation over time
-  if(pcRay.frame >= 0)
+  if(pcRay.frame == 0)
   {
-    float a         = 1.0f / float(pcRay.frame + 1);
-    vec3  old_color = imageLoad(image, ivec2(gl_LaunchIDEXT.xy)).xyz;
-    imageStore(image, ivec2(gl_LaunchIDEXT.xy), vec4(mix(old_color, prd.hitValue, a), 1.f));
+    // First frame, replace the value in the buffer
+    imageStore(image, ivec2(gl_LaunchIDEXT.xy), vec4(prd.hitValue, 1.f));
   }
   else
   {
-    // First frame, replace the value in the buffer
-    imageStore(image, ivec2(gl_LaunchIDEXT.xy), vec4(prd.hitValue, 1.f));
+    // Do accumulation over time
+    float a         = 1.0f / float(pcRay.frame + 1);
+    vec3  old_color = imageLoad(image, ivec2(gl_LaunchIDEXT.xy)).xyz;
+    imageStore(image, ivec2(gl_LaunchIDEXT.xy), vec4(mix(old_color, prd.hitValue, a), 1.f));
   }
 }