bool RTMesh::loadPlyFile(const std::tstring &path){	///////////////////////////////////////////////////////////////////	//Example source for loading .ply files:	//http://www.cc.gatech.edu/projects/large_models/ply.html	//	//Documentation:	//http://local.wasp.uwa.edu.au/~pbourke/dataformats/ply/plydocs.txt	///////////////////////////////////////////////////////////////////	FILE *file = fopen(path.c_str(), _T("r"));	if(file)	{		int nverts, nfaces;		Vertex **vlist;		Face **flist;		PlyOtherProp *vert_other, *face_other;		/* are normals in PLY file? */		int has_nx = 0;		int has_ny = 0;		int has_nz = 0;		int i,j;		int elem_count;		char *elem_name;		PlyFile *in_ply = read_ply(file);		/* examine each element type that is in the file (vertex, face) */		for (i = 0; i < in_ply->num_elem_types; i++)		{			/* prepare to read the i'th list of elements */			elem_name = setup_element_read_ply (in_ply, i, &elem_count);			if (equal_strings ("vertex", elem_name))			{				/* create a vertex list to hold all the vertices */				vlist = (Vertex **) malloc (sizeof (Vertex *) * elem_count);				nverts = elem_count;				/* set up for getting vertex elements */				/* (we want x,y,z) */				setup_property_ply (in_ply, &vert_props[0]);				setup_property_ply (in_ply, &vert_props[1]);				setup_property_ply (in_ply, &vert_props[2]);				/* we also want normal information if it is there (nx,ny,nz) */				for (j = 0; j < in_ply->elems->nprops; j++)				{					PlyProperty *prop;					prop = in_ply->elems->props[j];					if (equal_strings ("nx", prop->name))					{						setup_property_ply (in_ply, &vert_props[3]);						has_nx = 1;					}					if (equal_strings ("ny", prop->name))					{						setup_property_ply (in_ply, &vert_props[4]);						has_ny = 1;					}					if (equal_strings ("nz", prop->name))					{						setup_property_ply (in_ply, &vert_props[5]);						has_nz = 1;					}				}				/* also grab anything else that we don't need to know about */				vert_other = get_other_properties_ply (in_ply, offsetof(Vertex,other_props));				/* grab the vertex elements and store them in our list */				for (j = 0; j < elem_count; j++)				{					vlist[j] = (Vertex *) malloc (sizeof (Vertex));					get_element_ply (in_ply, (void *) vlist[j]);				}			}			else if (equal_strings ("face", elem_name))			{				/* create a list to hold all the face elements */				flist = (Face **) malloc (sizeof (Face *) * elem_count);				nfaces = elem_count;				/* set up for getting face elements */				/* (all we need are vertex indices) */				setup_property_ply (in_ply, &face_props[0]);				face_other = get_other_properties_ply (in_ply, offsetof(Face,other_props));				/* grab all the face elements and place them in our list */				for (j = 0; j < elem_count; j++)				{					flist[j] = (Face *) malloc (sizeof (Face));					get_element_ply (in_ply, (void *) flist[j]);				}			}			else  /* all non-vertex and non-face elements are grabbed here */			{				get_other_element_ply (in_ply);			}		}		close_ply(in_ply);		//This is where my code begins.		/////////////////////////////////////		//Take raw data and add tris to mesh.		/////////////////////////////////////		for(unsigned int i = 0; i < nfaces; ++i)		{			Face *face = flist;			int numVerts = face->nverts;			Vector3f vec[3];			//Fill three vertices with data from vlist.			//Only use the first 3 verts of a polygon - models MUST consist of triangles only for this to work.			for(unsigned int j = 0; j < 3 /*numVerts*/; ++j)			{				Vertex *vertex = vlist[face->verts[j]];				vec[j] = Vector3f(vertex->x, vertex->y, vertex->z);			}			//add the face to the mesh, reversing the winding order.			mTris.push_back(RTTriangle(vec[0], vec[2], vec[1], mMaterial));		}		return true;	}	return false;}