3D properties on renderers

The properties of the 3D Axes that were placed on the Renderer during draw are

now deprecated:

* ``renderer.M``

* ``renderer.eye``

* ``renderer.vvec``

* ``renderer.get_axis_position``

These attributes are all available via `.Axes3D`, which can be accessed via

``self.axes`` on all `.Artist`\s.

props3d = {

name: cbook.deprecated('3.4', name=name,

alternative=f'self.axes.{name}')(

property(lambda self, _value=getattr(self, name): _value))

for name in ['M', 'vvec', 'eye', 'get_axis_position']

}

with cbook._setattr_cm(type(renderer), **props3d):

# Calculate projection of collections and patches and zorder them.

# Make sure they are drawn above the grids.

zorder_offset = max(axis.get_zorder()

for axis in self._get_axis_list()) + 1

for i, col in enumerate(

sorted(self.collections,

key=lambda col: col.do_3d_projection(renderer),

reverse=True)):

col.zorder = zorder_offset + i

for i, patch in enumerate(

sorted(self.patches,

key=lambda patch: patch.do_3d_projection(renderer),

reverse=True)):

patch.zorder = zorder_offset + i

if self._axis3don:

# Draw panes first

for axis in self._get_axis_list():

axis.draw_pane(renderer)

# Then axes

for axis in self._get_axis_list():

axis.draw(renderer)

# Then rest

super().draw(renderer)