def tex_coord(x, y, n=4):
 m = (1.0 / n)
 dx = (x * m)
 dy = (y * m)
 return (dx, dy, (dx + m), dy, (dx + m), (dy + m), dx, (dy + m))

def tex_coord ( x , y , n = 4 ) : m = ( 1.0 / n ) dx = ( x * m ) dy = ( y * m ) return ( dx , dy , ( dx + m ) , dy , ( dx + m ) , ( dy + m ) , dx , ( dy + m ) )
return the bounding vertices of the texture square .