def intersection(self, ray_origin, ray_dir):
v = [Point(*self.matrix.transform(v)).numpy() for v in self.m]
I = zpr.ray_triangle(ray_origin, ray_dir, (v[0], v[1], v[2]))
if (I is None) and (len(v) > 3):
I = zpr.ray_triangle(ray_origin, ray_dir, (v[2], v[3], v[0]))
if I is None:
return ()
return ((Point(*I), self),)
def pick(self, ray):
for triangle in self.triangles:
I = zpr.ray_triangle(ray[0], ray[1], triangle)
if I is not None:
x, y, z = I
assert z == 0
return Point(x, y)
