Making Tetrahedron look better.

src/Cxx/GeometricObjects/Tetrahedron.cxx

-#include <vtkVersion.h>
-#include <vtkSmartPointer.h>
+#include <vtkActor.h>
 #include <vtkCellArray.h>
-#include <vtkTetra.h>
-#include <vtkUnstructuredGrid.h>
-#include <vtkPoints.h>
 #include <vtkCellType.h>
 #include <vtkDataSetMapper.h>
-#include <vtkActor.h>
-#include <vtkRenderWindow.h>
+#include <vtkNamedColors.h>
+#include <vtkPoints.h>
+#include <vtkProperty.h>
 #include <vtkRenderer.h>
+#include <vtkRenderWindow.h>
 #include <vtkRenderWindowInteractor.h>
+#include <vtkSmartPointer.h>
+#include <vtkTetra.h>
+#include <vtkUnstructuredGrid.h>
+#include <vtkVersion.h>
 
 int main(int, char*[])
 {
+  vtkSmartPointer<vtkNamedColors> colors =
+    vtkSmartPointer<vtkNamedColors>::New();
+
   vtkSmartPointer< vtkPoints > points =
     vtkSmartPointer< vtkPoints > :: New();
   points->InsertNextPoint(0, 0, 0);
@@ -62,6 +67,7 @@ int main(int, char*[])
   vtkSmartPointer<vtkActor> actor1 = 
     vtkSmartPointer<vtkActor>::New();
   actor1->SetMapper(mapper1);
+  actor1->GetProperty()->SetColor(colors->GetColor3d("Cyan").GetData());
   
   // Create a mapper and actor
   vtkSmartPointer<vtkDataSetMapper> mapper2 = 
@@ -75,12 +81,14 @@ int main(int, char*[])
   vtkSmartPointer<vtkActor> actor2 = 
     vtkSmartPointer<vtkActor>::New();
   actor2->SetMapper(mapper2);
+  actor2->GetProperty()->SetColor(colors->GetColor3d("Yellow").GetData());
  
   // Create a renderer, render window, and interactor
   vtkSmartPointer<vtkRenderer> renderer = 
     vtkSmartPointer<vtkRenderer>::New();
   vtkSmartPointer<vtkRenderWindow> renderWindow = 
     vtkSmartPointer<vtkRenderWindow>::New();
+  renderWindow->SetWindowName("Tetrahedron");
   renderWindow->AddRenderer(renderer);
   vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = 
     vtkSmartPointer<vtkRenderWindowInteractor>::New();
@@ -89,7 +97,7 @@ int main(int, char*[])
   // Add the actor to the scene
   renderer->AddActor(actor1);
   renderer->AddActor(actor2);
-  renderer->SetBackground(.3, .6, .3); // Background color green
+  renderer->SetBackground(colors->GetColor3d("DarkGreen").GetData());
  
   // Render and interact
   renderWindow->Render();

src/Python/GeometricObjects/Tetrahedron.py

@@ -2,78 +2,89 @@
 
 import vtk
 
-points = vtk.vtkPoints()
-points.InsertNextPoint(0, 0, 0)
-points.InsertNextPoint(1, 0, 0)
-points.InsertNextPoint(1, 1, 0)
-points.InsertNextPoint(0, 1, 1)
-points.InsertNextPoint(5, 5, 5)
-points.InsertNextPoint(6, 5, 5)
-points.InsertNextPoint(6, 6, 5)
-points.InsertNextPoint(5, 6, 6)
-
-# The first tetrahedron
-unstructuredGrid1 = vtk.vtkUnstructuredGrid()
-unstructuredGrid1.SetPoints(points)
-
-tetra = vtk.vtkTetra()
-
-tetra.GetPointIds().SetId(0, 0)
-tetra.GetPointIds().SetId(1, 1)
-tetra.GetPointIds().SetId(2, 2)
-tetra.GetPointIds().SetId(3, 3)
-
-cellArray = vtk.vtkCellArray()
-cellArray.InsertNextCell(tetra)
-unstructuredGrid1.SetCells(vtk.VTK_TETRA, cellArray)
-
-# The second tetrahedron
-unstructuredGrid2 = vtk.vtkUnstructuredGrid()
-unstructuredGrid2.SetPoints(points)
-
-tetra = vtk.vtkTetra()
-
-tetra.GetPointIds().SetId(0, 4)
-tetra.GetPointIds().SetId(1, 5)
-tetra.GetPointIds().SetId(2, 6)
-tetra.GetPointIds().SetId(3, 7)
-
-cellArray = vtk.vtkCellArray()
-cellArray.InsertNextCell(tetra)
-unstructuredGrid2.SetCells(vtk.VTK_TETRA, cellArray)
-
-# Create a mapper and actor
-mapper1 = vtk.vtkDataSetMapper()
-if vtk.VTK_MAJOR_VERSION <= 5:
-    mapper1.SetInputConnection(unstructuredGrid1.GetProducerPort())
-else:
-    mapper1.SetInputData(unstructuredGrid1)
-
-actor1 = vtk.vtkActor()
-actor1.SetMapper(mapper1)
-
-# Create a mapper and actor
-mapper2 = vtk.vtkDataSetMapper()
-if vtk.VTK_MAJOR_VERSION <= 5:
-    mapper2.SetInputConnection(unstructuredGrid2.GetProducerPort())
-else:
-    mapper2.SetInputData(unstructuredGrid2)
-
-actor2 = vtk.vtkActor()
-actor2.SetMapper(mapper2)
-
-# Create a renderer, render window, and interactor
-renderer = vtk.vtkRenderer()
-renderWindow = vtk.vtkRenderWindow()
-renderWindow.AddRenderer(renderer)
-renderWindowInteractor = vtk.vtkRenderWindowInteractor()
-renderWindowInteractor.SetRenderWindow(renderWindow)
-
-# Add the actor to the scene
-renderer.AddActor(actor1)
-renderer.AddActor(actor2)
-renderer.SetBackground(.3, .6, .3)  # Background color green
-
-# Render and interact
-renderWindow.Render()
-renderWindowInteractor.Start()
+
+def main():
+    colors = vtk.vtkNamedColors()
+
+    points = vtk.vtkPoints()
+    points.InsertNextPoint(0, 0, 0)
+    points.InsertNextPoint(1, 0, 0)
+    points.InsertNextPoint(1, 1, 0)
+    points.InsertNextPoint(0, 1, 1)
+    points.InsertNextPoint(5, 5, 5)
+    points.InsertNextPoint(6, 5, 5)
+    points.InsertNextPoint(6, 6, 5)
+    points.InsertNextPoint(5, 6, 6)
+
+    # The first tetrahedron
+    unstructuredGrid1 = vtk.vtkUnstructuredGrid()
+    unstructuredGrid1.SetPoints(points)
+
+    tetra = vtk.vtkTetra()
+
+    tetra.GetPointIds().SetId(0, 0)
+    tetra.GetPointIds().SetId(1, 1)
+    tetra.GetPointIds().SetId(2, 2)
+    tetra.GetPointIds().SetId(3, 3)
+
+    cellArray = vtk.vtkCellArray()
+    cellArray.InsertNextCell(tetra)
+    unstructuredGrid1.SetCells(vtk.VTK_TETRA, cellArray)
+
+    # The second tetrahedron
+    unstructuredGrid2 = vtk.vtkUnstructuredGrid()
+    unstructuredGrid2.SetPoints(points)
+
+    tetra = vtk.vtkTetra()
+
+    tetra.GetPointIds().SetId(0, 4)
+    tetra.GetPointIds().SetId(1, 5)
+    tetra.GetPointIds().SetId(2, 6)
+    tetra.GetPointIds().SetId(3, 7)
+
+    cellArray = vtk.vtkCellArray()
+    cellArray.InsertNextCell(tetra)
+    unstructuredGrid2.SetCells(vtk.VTK_TETRA, cellArray)
+
+    # Create a mapper and actor
+    mapper1 = vtk.vtkDataSetMapper()
+    if vtk.VTK_MAJOR_VERSION <= 5:
+        mapper1.SetInputConnection(unstructuredGrid1.GetProducerPort())
+    else:
+        mapper1.SetInputData(unstructuredGrid1)
+
+    actor1 = vtk.vtkActor()
+    actor1.SetMapper(mapper1)
+    actor1.GetProperty().SetColor(colors.GetColor3d("Cyan"))
+
+    # Create a mapper and actor
+    mapper2 = vtk.vtkDataSetMapper()
+    if vtk.VTK_MAJOR_VERSION <= 5:
+        mapper2.SetInputConnection(unstructuredGrid2.GetProducerPort())
+    else:
+        mapper2.SetInputData(unstructuredGrid2)
+
+    actor2 = vtk.vtkActor()
+    actor2.SetMapper(mapper2)
+    actor2.GetProperty().SetColor(colors.GetColor3d("Yellow"))
+
+    # Create a renderer, render window, and interactor
+    renderer = vtk.vtkRenderer()
+    renderWindow = vtk.vtkRenderWindow()
+    renderWindow.SetWindowName("Tetrahedron")
+    renderWindow.AddRenderer(renderer)
+    renderWindowInteractor = vtk.vtkRenderWindowInteractor()
+    renderWindowInteractor.SetRenderWindow(renderWindow)
+
+    # Add the actor to the scene
+    renderer.AddActor(actor1)
+    renderer.AddActor(actor2)
+    renderer.SetBackground(colors.GetColor3d("DarkGreen"))
+
+    # Render and interact
+    renderWindow.Render()
+    renderWindowInteractor.Start()
+
+
+if __name__ == '__main__':
+    main()