diff --git a/lib/mpl_toolkits/mplot3d/axis3d.py b/lib/mpl_toolkits/mplot3d/axis3d.py
index 6f33d83c1849..c34ca25b98e4 100644
--- a/lib/mpl_toolkits/mplot3d/axis3d.py
+++ b/lib/mpl_toolkits/mplot3d/axis3d.py
@@ -247,11 +247,8 @@ def draw(self, renderer):
self.line.draw(renderer)
# Grid points where the planes meet
- xyz0 = []
- for tick in ticks:
- coord = minmax.copy()
- coord[index] = tick.get_loc()
- xyz0.append(coord)
+ xyz0 = np.tile(minmax, (len(ticks), 1))
+ xyz0[:, index] = [tick.get_loc() for tick in ticks]
# Draw labels
peparray = np.asanyarray(pep)
@@ -357,30 +354,25 @@ def draw(self, renderer):
self.offsetText.draw(renderer)
# Draw grid lines
- if len(xyz0) > 0:
+ if self.axes._draw_grid and len(ticks):
# Grid points at end of one plane
- xyz1 = copy.deepcopy(xyz0)
+ xyz1 = xyz0.copy()
newindex = (index + 1) % 3
newval = get_flip_min_max(xyz1[0], newindex, mins, maxs)
- for i in range(len(ticks)):
- xyz1[i][newindex] = newval
+ xyz1[:, newindex] = newval
# Grid points at end of the other plane
- xyz2 = copy.deepcopy(xyz0)
+ xyz2 = xyz0.copy()
newindex = (index + 2) % 3
newval = get_flip_min_max(xyz2[0], newindex, mins, maxs)
- for i in range(len(ticks)):
- xyz2[i][newindex] = newval
-
- lines = list(zip(xyz1, xyz0, xyz2))
- if self.axes._draw_grid:
- self.gridlines.set_segments(lines)
- self.gridlines.set_color([info['grid']['color']] * len(lines))
- self.gridlines.set_linewidth(
- [info['grid']['linewidth']] * len(lines))
- self.gridlines.set_linestyle(
- [info['grid']['linestyle']] * len(lines))
- self.gridlines.draw(renderer, project=True)
+ xyz2[:, newindex] = newval
+
+ lines = np.stack([xyz1, xyz0, xyz2], axis=1)
+ self.gridlines.set_segments(lines)
+ self.gridlines.set_color(info['grid']['color'])
+ self.gridlines.set_linewidth(info['grid']['linewidth'])
+ self.gridlines.set_linestyle(info['grid']['linestyle'])
+ self.gridlines.draw(renderer, project=True)
# Draw ticks
tickdir = info['tickdir']
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