Function visualizeTriangleMesh

physx/source/physx/src/NpShapeManager.cpp:556–634

}

static void visualizeTriangleMesh(const PxTriangleMeshGeometry& geometry, RenderOutput& out, const PxTransform& pose, const PxBounds3& cullbox, const PxReal fscale, bool visualizeShapes, bool visualizeEdges, bool useCullBox)
{
	const TriangleMesh* triangleMesh = static_cast<const TriangleMesh*>(geometry.triangleMesh);
	
	const PxMat44 midt(PxIdentity);
	const Matrix34 absPose(PxMat33(pose.q) * geometry.scale.toMat33(), pose.p);

	PxU32 nbTriangles = triangleMesh->getNbTrianglesFast();
	const PxU32 nbVertices = triangleMesh->getNbVerticesFast();
	const PxVec3* vertices = triangleMesh->getVerticesFast();
	const void* indices = triangleMesh->getTrianglesFast();
	const bool has16Bit = triangleMesh->has16BitIndices();

	// PT: TODO: don't render the same edge multiple times

	PxU32* results = NULL;
	if(useCullBox)
	{
		const Gu::Box worldBox(
			(cullbox.maximum + cullbox.minimum)*0.5f,
			(cullbox.maximum - cullbox.minimum)*0.5f,
			PxMat33(PxIdentity));
		
		// PT: TODO: use the callback version here to avoid allocating this huge array
		results = reinterpret_cast<PxU32*>(PX_ALLOC_TEMP(sizeof(PxU32)*nbTriangles, "tmp triangle indices"));
		LimitedResults limitedResults(results, nbTriangles, 0);
		Midphase::intersectBoxVsMesh(worldBox, *triangleMesh, pose, geometry.scale, &limitedResults);
		nbTriangles = limitedResults.mNbResults;

		if(visualizeShapes)
		{
			const PxU32 scolor = gCollisionShapeColor;

			out << midt << scolor;	// PT: no need to output this for each segment!

			PxDebugLine* segments = out.reserveSegments(nbTriangles*3);
			for(PxU32 i=0; i<nbTriangles; i++)
			{
				PxVec3 wp[3];
				getTriangle(*triangleMesh, results[i], wp, vertices, indices, absPose, has16Bit);
				outputTriangle(segments, wp[0], wp[1], wp[2], scolor);
				segments+=3;
			}
		}
	}
	else
	{
		if(visualizeShapes)
		{
			const PxU32 scolor = gCollisionShapeColor;

			out << midt << scolor;	// PT: no need to output this for each segment!

			// PT: TODO: use SIMD
			PxVec3* transformed = reinterpret_cast<PxVec3*>(PX_ALLOC(sizeof(PxVec3)*nbVertices, "PxVec3"));
			for(PxU32 i=0;i<nbVertices;i++)
				transformed[i] = absPose.transform(vertices[i]);