From: isk <isk@opencascade.com>
Date: Tue, 3 Nov 2015 14:08:08 +0000 (+0300)
Subject: Fix Path Tracing trouble.
X-Git-Url: http://git.dev.opencascade.org/gitweb/?a=commitdiff_plain;h=605444a27bd61eefb5400465fb0f307a8dd17f24;p=occt-copy.git

Fix Path Tracing trouble.
---

diff --git a/src/OpenGl/OpenGl_View_Raytrace.cxx b/src/OpenGl/OpenGl_View_Raytrace.cxx
index a32d792530..cae667498e 100644
--- a/src/OpenGl/OpenGl_View_Raytrace.cxx
+++ b/src/OpenGl/OpenGl_View_Raytrace.cxx
@@ -2419,8 +2419,8 @@ Standard_Boolean OpenGl_View::runRaytraceShaders (const Standard_Integer
     {
       for (int aPassIndex = 0; aPassIndex < aSamplesPerPixel; ++aPassIndex)
       {
-        aRenderFramebuffer = myAccumFrames % 2 ? myRaytraceFBO1[aFBOIdx] : myRaytraceFBO2[aFBOIdx];
-        anAccumFramebuffer = myAccumFrames % 2 ? myRaytraceFBO2[aFBOIdx] : myRaytraceFBO1[aFBOIdx];
+        aRenderFramebuffer = (myAccumFrames + aPassIndex) % 2 ? myRaytraceFBO1[aFBOIdx] : myRaytraceFBO2[aFBOIdx];
+        anAccumFramebuffer = (myAccumFrames + aPassIndex) % 2 ? myRaytraceFBO2[aFBOIdx] : myRaytraceFBO1[aFBOIdx];
 
         aRenderFramebuffer->BindBuffer (theGlContext);
 
@@ -2429,14 +2429,14 @@ Standard_Boolean OpenGl_View::runRaytraceShaders (const Standard_Integer
 
         // Set frame accumulation weight
         myRaytraceProgram->SetUniform (theGlContext,
-          myUniformLocations[0][OpenGl_RT_uSampleWeight], 1.f / (myAccumFrames + 1));
+          myUniformLocations[0][OpenGl_RT_uSampleWeight], 1.f / (myAccumFrames + aPassIndex + 1));
 
         // Set random number generator seed
         myRaytraceProgram->SetUniform (theGlContext,
           myUniformLocations[0][OpenGl_RT_uFrameRndSeed], static_cast<Standard_Integer> (myRNG.NextInt() >> 2));
 
         theGlContext->core20fwd->glDrawArrays (GL_TRIANGLES, 0, 6);
-        ++myAccumFrames;
+        //++myAccumFrames;
         glFinish();
       }
     }
diff --git a/src/OpenGl/OpenGl_View_Redraw.cxx b/src/OpenGl/OpenGl_View_Redraw.cxx
index 28f354b5dd..bb4a2936b4 100644
--- a/src/OpenGl/OpenGl_View_Redraw.cxx
+++ b/src/OpenGl/OpenGl_View_Redraw.cxx
@@ -475,7 +475,8 @@ void OpenGl_View::Redraw()
   if (myRenderParams.Method == Graphic3d_RM_RAYTRACING
    && myRenderParams.IsGlobalIlluminationEnabled)
   {
-    myAccumFrames++;
+    //myAccumFrames++;
+    myAccumFrames += myRenderParams.SamplesPerPixel ? myRenderParams.SamplesPerPixel : 1;
   }
 
   // bind default FBO