Use delta values instead of sample_size in multi render methods

Author: orbingol

geomdl/Multi.py

@@ -127,7 +127,7 @@ def render(self, **kwargs):
         # Run the visualization component
         self._vis_component.clear()
         for idx, elem in enumerate(self._elements):
-            elem.sample_size = self.sample_size
+            elem.delta = self.delta
             elem.evaluate()
 
             # Color selection
@@ -362,7 +362,7 @@ def render(self, **kwargs):
         # Run the visualization component
         self._vis_component.clear()
         for idx, elem in enumerate(self._elements):
-            elem.sample_size = self.sample_size
+            elem.delta = self.delta
             elem.evaluate()
 
             # Color selection