fixed a slow down in terrain nodes.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@1572 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/CTerrainSceneNode.cpp

@@ -505,6 +505,24 @@ namespace scene
 	}
 
 	void CTerrainSceneNode::preRenderIndicesCalculations()
+	{
+		switch (RenderBuffer->getIndexBuffer().getType())
+		{
+			case video::EIT_16BIT:
+			{
+				preRenderIndicesCalculationsDirect<u16>((u16*)RenderBuffer->getIndexBuffer().pointer());
+				break;
+			}
+			case video::EIT_32BIT:
+			{
+				preRenderIndicesCalculationsDirect<u32>((u32*)RenderBuffer->getIndexBuffer().pointer());
+				break;
+			}
+		}
+	}
+
+	template<class INDEX_TYPE>
+	void CTerrainSceneNode::preRenderIndicesCalculationsDirect(INDEX_TYPE* IndexBuffer)
 	{
 		IndicesToRender = 0;
 		s32 index11;
@@ -534,12 +552,12 @@ namespace scene
 						index12 = getIndex( j, i, index, x, z + step );
 						index22 = getIndex( j, i, index, x + step, z + step );
 
-						RenderBuffer->getIndexBuffer().setValue(IndicesToRender++, index12);
-						RenderBuffer->getIndexBuffer().setValue(IndicesToRender++,index11);
-						RenderBuffer->getIndexBuffer().setValue(IndicesToRender++, index22);
-						RenderBuffer->getIndexBuffer().setValue(IndicesToRender++, index22);
-						RenderBuffer->getIndexBuffer().setValue(IndicesToRender++, index11);
-						RenderBuffer->getIndexBuffer().setValue(IndicesToRender++, index21);
+						IndexBuffer[IndicesToRender++]= index12;
+						IndexBuffer[IndicesToRender++]= index11;
+						IndexBuffer[IndicesToRender++]= index22;
+						IndexBuffer[IndicesToRender++]= index22;
+						IndexBuffer[IndicesToRender++]= index11;
+						IndexBuffer[IndicesToRender++]= index21;
 
 						// increment index position horizontally
 						x += step;
@@ -564,6 +582,10 @@ namespace scene
 	}
 
 
+
+
+
+
 	//! Render the scene node
 	void CTerrainSceneNode::render()
 	{

source/Irrlicht/CTerrainSceneNode.h

@@ -279,6 +279,9 @@ namespace scene
 		virtual void preRenderLODCalculations();
 		virtual void preRenderIndicesCalculations();
 
+		template<class INDEX_TYPE>
+		void preRenderIndicesCalculationsDirect(INDEX_TYPE* IndexBuffer);
+
 		//! get indices when generating index data for patches at varying levels of detail.
 		u32 getIndex(const s32 PatchX, const s32 PatchZ, const s32 PatchIndex, u32 vX, u32 vZ) const;