public-mirrors/3b1b-manim
1
0
Fork 0
mirror of https://github.com/3b1b/manim.git synced 2025-08-05 16:49:03 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Only reorient points for triangulation if the normal vector is not OUT

Browse source
This commit is contained in:
Grant Sanderson 2021-02-03 14:18:58 -08:00
parent 0726dccd0a
commit 7dffa24acd
1 changed files with 6 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
manimlib/mobject/types/vectorized_mobject.py
View file

@ -765,9 +765,9 @@ class VMobject(Mobject):
self.needs_new_triangulation = False
return self.triangulation
# Rotate points such that unit normal vector is OUT
# TODO, 99% of the time this does nothing. Do a check for that?
points = np.dot(points, z_to_vector(normal_vector))
if not np.isclose(normal_vector, OUT).all():
# Rotate points such that unit normal vector is OUT
points = np.dot(points, z_to_vector(normal_vector))
indices = np.arange(len(points), dtype=int)
b0s = points[0::3]
@ -797,7 +797,9 @@ class VMobject(Mobject):
# Triangulate
inner_verts = points[inner_vert_indices]
inner_tri_indices = inner_vert_indices[earclip_triangulation(inner_verts, rings)]
inner_tri_indices = inner_vert_indices[
earclip_triangulation(inner_verts, rings)
]
tri_indices = np.hstack([indices, inner_tri_indices])
self.triangulation = tri_indices