allow animation client to set 3D projection type

Author: petercorke

spatialmath/base/animate.py

@@ -146,6 +146,9 @@ def trplot(self, end, start=None, **kwargs):
         # draw axes at the origin
         base.trplot(self.start, ax=self, **kwargs)
 
+    def set_proj_type(self, proj_type):
+        self.ax.set_proj_type(proj_type)
+
     def run(
         self,
         movie=None,