Optimized texture matrix setting.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@2193 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/CD3D9Driver.cpp

@@ -644,9 +644,14 @@ void CD3D9Driver::setTransform(E_TRANSFORMATION_STATE state,
 	case ETS_TEXTURE_1:
 	case ETS_TEXTURE_2:
 	case ETS_TEXTURE_3:
-		pID3DDevice->SetTextureStageState( state - ETS_TEXTURE_0, D3DTSS_TEXTURETRANSFORMFLAGS, D3DTTFF_COUNT2 );
-		pID3DDevice->SetTransform((D3DTRANSFORMSTATETYPE)(D3DTS_TEXTURE0+ ( state - ETS_TEXTURE_0 )),
-			(D3DMATRIX*)((void*)mat.pointer()));
+		if (mat.isIdentity())
+			pID3DDevice->SetTextureStageState( state - ETS_TEXTURE_0, D3DTSS_TEXTURETRANSFORMFLAGS, D3DTTFF_DISABLE );
+		else
+		{
+			pID3DDevice->SetTextureStageState( state - ETS_TEXTURE_0, D3DTSS_TEXTURETRANSFORMFLAGS, D3DTTFF_COUNT2 );
+			pID3DDevice->SetTransform((D3DTRANSFORMSTATETYPE)(D3DTS_TEXTURE0+ ( state - ETS_TEXTURE_0 )),
+				(D3DMATRIX*)((void*)mat.pointer()));
+		}
 		break;
 	case ETS_COUNT:
 		break;
@@ -1763,7 +1768,7 @@ void CD3D9Driver::setBasicRenderStates(const SMaterial& material, const SMateria
 	// specular highlights
 	if (resetAllRenderstates || !core::equals(lastmaterial.Shininess,material.Shininess))
 	{
-		bool enable = (material.Shininess!=0.0f);
+		const bool enable = (material.Shininess!=0.0f);
 		pID3DDevice->SetRenderState(D3DRS_SPECULARENABLE, enable);
 		pID3DDevice->SetRenderState(D3DRS_SPECULARMATERIALSOURCE, D3DMCS_MATERIAL);
 	}