GE Patch by Hamed Zaghaghi - Adding Motion Blur to the Game Engine.

I reviewed the code, suggested an update ( initialising accumulation buffer ), and tested the resulting update successfully.

It's great to see more GE developers!GE Patch by Hamed Zaghaghi to add motion blur to the GE ( using the accumulation buffer ).

I reviewed code and tested, gave some feedback ( initialising accumulation buffer ) which was implemented straight away, and re-reviewed.

It's great to have another GE coder on the team!

2 files changed, 26 insertions, 0 deletions

diff --git a/source/gameengine/GamePlayer/common/GPC_RenderTools.cpp b/source/gameengine/GamePlayer/common/GPC_RenderTools.cpp
index 0f6bec30437..cc5c392d51a 100644
--- a/source/gameengine/GamePlayer/common/GPC_RenderTools.cpp
+++ b/source/gameengine/GamePlayer/common/GPC_RenderTools.cpp
@@ -570,4 +570,27 @@ void GPC_RenderTools::applyTransform(RAS_IRasterizer* rasty,double* oglmatrix,in
 	}
 }
 
+void GPC_RenderTools::MotionBlur(RAS_IRasterizer* rasterizer)
+{
+	int state = rasterizer->GetMotionBlurState();
+	float motionblurvalue;
+	if(state)
+	{
+		motionblurvalue = rasterizer->GetMotionBlurValue();
+		if(state==1)
+		{
+			//bugfix:load color buffer into accum buffer for the first time(state=1)
+			glAccum(GL_LOAD, 1.0);
+			rasterizer->SetMotionBlurState(2);
+		}
+		else if(motionblurvalue>=0.0 && motionblurvalue<=1.0)
+		{
+			glAccum(GL_MULT, motionblurvalue);
+			glAccum(GL_ACCUM, 1-motionblurvalue);
+			glAccum(GL_RETURN, 1.0);
+			glFlush();
+		}
+	}
+}
+
 unsigned int GPC_RenderTools::m_numgllights;
diff --git a/source/gameengine/GamePlayer/common/GPC_RenderTools.h b/source/gameengine/GamePlayer/common/GPC_RenderTools.h
index b7f73df3c34..e1f2a869c22 100644
--- a/source/gameengine/GamePlayer/common/GPC_RenderTools.h
+++ b/source/gameengine/GamePlayer/common/GPC_RenderTools.h
@@ -149,6 +149,8 @@ public:
 	int applyLights(int objectlayer);
 
 	bool RayHit(KX_ClientObjectInfo* client, MT_Point3& hit_point, MT_Vector3& hit_normal, void * const data);
+
+	virtual void MotionBlur(RAS_IRasterizer* rasterizer);
 protected:
 	/** 
 	 * Copied from KX_BlenderGL.cpp in KX_blenderhook
@@ -173,3 +175,4 @@ protected:
 
 #endif  // __GPC_RENDERTOOLS_H
 
+