change Void space plotting from spheres to dots - much faster!

Author: vondreele

GSASII/GSASIIplot.py

@@ -7418,8 +7418,10 @@ def Draw(caller='',Fade=[],NPkey=False):
                 Backbone = Backbones[chain]
                 RenderBackbone(Backbone,BackboneColor,bondR)
         if drawingData['showVoids']:
-            for x,y,z in drawingData['Voids']:
-                RenderSphere(x,y,z,.05,(0.,0.,1.),True)
+            RC = len(drawingData['Voids'])*[[0.05,2*Bl]]
+            RenderDots(drawingData['Voids'],RC)
+            # for x,y,z in drawingData['Voids']:
+            #     RenderSphere(x,y,z,.05,(0.,0.,1.),True)
         if drawingData['unitCellBox']:
             RenderBox()
             if drawingData['Plane'][1]: