private void ParseSectorVertices(Sector sector, Tokenizer levelTokens)
{
levelTokens.EnsureNextToken("VERTICES");
int numVerts = levelTokens.RequireNextInt();
for (int i = 0; i < numVerts; ++i) {
Vector2 v;
levelTokens.EnsureNextToken("X:");
v.x = levelTokens.RequireNextFloat();
levelTokens.EnsureNextToken("Z:");
v.y = levelTokens.RequireNextFloat();
sector.Vertices.Add(v);
}
}