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[Fix] chapter 3: fix draw3d error #26

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[Fix] chapter 3: fix draw3d error #26

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11 changes: 6 additions & 5 deletions Chapter 03/draw3d.py
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
import numpy as np
from math import sqrt, pi
import matplotlib
import os
Expand All @@ -8,18 +9,18 @@
from mpl_toolkits.mplot3d.art3d import Poly3DCollection
from colors import *

## https://stackoverflow.com/a/22867877/1704140
## https://stackoverflow.com/a/74122407/1968614
class FancyArrow3D(FancyArrowPatch):
def __init__(self, xs, ys, zs, *args, **kwargs):
FancyArrowPatch.__init__(self, (0,0), (0,0), *args, **kwargs)
super().__init__((0,0), (0,0), *args, **kwargs)
self._verts3d = xs, ys, zs

def draw(self, renderer):
def do_3d_projection(self, renderer=None):
xs3d, ys3d, zs3d = self._verts3d
xs, ys, zs = proj3d.proj_transform(xs3d, ys3d, zs3d, renderer.M)
xs, ys, zs = proj3d.proj_transform(xs3d, ys3d, zs3d, self.axes.M)
self.set_positions((xs[0],ys[0]),(xs[1],ys[1]))
FancyArrowPatch.draw(self, renderer)

return np.min(zs)

class Polygon3D():
def __init__(self, *vertices, color=blue):
Expand Down