Issues with triangle mesh cooking PhysX 3.3.4

Gaming and Visualization Technologies APIs Physics Modeling (closed)
1

Hi so i have wrote a python script to convert an wavefront OBJ file from blender into PxVec3 vertex array and a PxU32 triangle array, which is then used to create the triangle mesh.

However the issue that I’m experiencing is that this works perfectly sometimes, and other time not so much - with the same mesh. E.g. I start my PhysX program, and create 10 of the same objects and some of them look like this:

https://i.stack.imgur.com/3mxES.png

but then 2 or 3 will look like this despite being loaded with the same data

https://i.stack.imgur.com/FIaRg.png

both are being passed the vertex and triangles array however they result in vastly different outputs. Below is the code i am using to cook the mesh

class CustomObject : public StaticActor
	{
	public:
		ModelLoader* modelLoader;
		std::vector<PxVec3>objectVerts;
		std::vector<PxU32>objectTrigs;

		CustomObject(const PxTransform& pose = PxTransform(PxIdentity), string vert = "", string trig = "") :
			StaticActor(pose)
		{
			//creates new model loader to load vertex and triangle data
			modelLoader = new ModelLoader();

			objectVerts = modelLoader->LoadVertexFile(vert);	//returns PxVec3 and stores in vector
			objectTrigs = modelLoader->LoadTrianglesFile(trig);	//returns PxU32 and stores in vector

			PxTriangleMeshDesc mesh_desc;
			mesh_desc.points.count = (PxU32)objectVerts.size();
			mesh_desc.points.stride = sizeof(PxVec3);
			mesh_desc.points.data = &objectVerts.front();
			mesh_desc.triangles.count = (PxU32)objectTrigs.size();
			mesh_desc.triangles.stride = 3 * sizeof(PxU32);
			mesh_desc.triangles.data = &objectTrigs.front();

			PxDefaultMemoryOutputStream stream;

 			if (!GetCooking()->cookTriangleMesh(mesh_desc, stream))
				throw new Exception("TriangleMesh::CookMesh, cooking failed.");

			PxDefaultMemoryInputData input(stream.getData(), stream.getSize());
			PxTriangleMeshGeometry meshGeometry = GetPhysics()->createTriangleMesh(input);
			CreateShape(meshGeometry);
		}

		~CustomObject()
		{
			std::cout << "Custom Object Deleted" << std::endl;
			delete modelLoader;
		}
	};

EDIT: I’ve updated my code to make sure that CustomObject always has a copy of the vertex and triangle data, however the problem still persists