Method Build

PEEL/Physics/PINT_Opcode1_3/Opcode13/OPC_Model.cpp:140–211

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// * Builds a collision model. * \param create [in] model creation structure * \return true if success */ ////////////////////////////////////////////////////////////////////////////////////////////////

 */
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
bool Model::Build(const OPCODECREATE& create)
{
	// 1) Checkings
	if(!create.mIMesh || !create.mIMesh->IsValid())	return false;

	// For this model, we only support complete trees
	if(create.mSettings.mLimit!=1)	return SetIceError("OPCODE WARNING: supports complete trees only! Use mLimit = 1.\n", null);

	// Look for degenerate faces.
	udword NbDegenerate = create.mIMesh->CheckTopology();
	if(NbDegenerate)	Log(_F("OPCODE WARNING: found %d degenerate faces in model! Collision might report wrong results!\n", NbDegenerate));
	// We continue nonetheless.... 

	Release();	// Make sure previous tree has been discarded [Opcode 1.3, thanks Adam]

	// 1-1) Setup mesh interface automatically [Opcode 1.3]
	SetMeshInterface(create.mIMesh);

	// Special case for 1-triangle meshes [Opcode 1.3]
	udword NbTris = create.mIMesh->GetNbTriangles();
	if(NbTris==1)
	{
		// We don't need to actually create a tree here, since we'll only have a single triangle to deal with anyway.
		// It's a waste to use a "model" for this but at least it will work.
		mModelCode |= OPC_SINGLE_NODE;
		return true;
	}

	// 2) Build a generic AABB Tree.
	mSource = ICE_NEW(AABBTree);
	CHECKALLOC(mSource);

	// 2-1) Setup a builder. Our primitives here are triangles from input mesh,
	// so we use an AABBTreeOfTrianglesBuilder.....
	{
		AABBTreeOfTrianglesBuilder TB;
		TB.mIMesh			= create.mIMesh;
		TB.mSettings		= create.mSettings;
		TB.mNbPrimitives	= NbTris;
		if(!mSource->Build(&TB))	return false;
	}

	// 3) Create an optimized tree according to user-settings
	if(!CreateTree(create.mNoLeaf, create.mQuantized))	return false;

	// 3-2) Create optimized tree
	if(!mTree->Build(mSource))	return false;

	// 3-3) Delete generic tree if needed
	if(!create.mKeepOriginal)	DELETESINGLE(mSource);

#ifdef __MESHMERIZER_H__
	// 4) Convex hull
	if(create.mCollisionHull)
	{
		// Create hull
		mHull = new CollisionHull;
		CHECKALLOC(mHull);