static void ReadMOPV(BinaryReader br, WMORoot wmo)
{
// PortalCount of 4 x Vector3 to form a rectangle for the doorway
uint vertexCount = wmo.Header.PortalCount*4;
wmo.PortalVertices = new Vector3[vertexCount];
for (var i=0; i<vertexCount; i++)
{
wmo.PortalVertices[i] = br.ReadVector3();
}
}