Merge pull request #388 from chakravarthi589/Add_Cursor3D

Add cursor3D

src/Java.md

@@ -181,6 +181,7 @@ It would be appreciated if there are any Java VTK experts who could convert any
 [BackgroundGradient](/Java/Visualization/BackgroundGradient) |  | viewport having gradient background using the Background (bottom) and Background2 (top) colors.
 [ColorAnActor](/Java/Visualization/ColorAnActor) | vtkActor vtkCanvas | Switch style interaction adds C and A key actions for selecting Camera or Actor interaction, and T and J key actions for Trackball or Joystick interaction mode. Adds charEvent observer callback to restore the missing E and Q events to quit.
 [Cursor2D](/Java/Visualization/Cursor2D) | vtkCursor2D | Generates a 2D Cursor Representation.
+[Cursor3D](/Java/Visualization/Cursor3D) | vtkCursor3D | Generates a 3D Cursor Representation
 [Cutter](/Java/VisualizationAlgorithms/Cutter) | vtkCutter | How to use vtkCutter by cutting through a cube.
 [Follower](/Java/Visualization/Follower) | vtkFollower | Draw text that stays right side up.
 [VectorFieldExample](/Java/Visualization/VectorFieldExample) | vtkXMLUnstructuredGridReader, vtkThresholdPoints, vtkGlyph3D | A vector field visualisation.

src/Java/Visualization/Cursor3D.java

+import vtk.vtkActor;
+import vtk.vtkSphereSource;
+import vtk.vtkNativeLibrary;
+import vtk.vtkPolyDataMapper;
+import vtk.vtkRenderWindow;
+import vtk.vtkRenderWindowInteractor;
+import vtk.vtkRenderer;
+import vtk.vtkNamedColors;
+import vtk.vtkCursor3D;
+
+public class Cursor3D
+{
+  // -----------------------------------------------------------------
+  // Load VTK library and print which library was not properly loaded
+  static 
+  {
+    if (!vtkNativeLibrary.LoadAllNativeLibraries()) 
+    {
+      for (vtkNativeLibrary lib : vtkNativeLibrary.values()) 
+      {
+        if (!lib.IsLoaded()) 
+        {
+          System.out.println(lib.GetLibraryName() + " not loaded");
+        }
+      }
+    }
+    vtkNativeLibrary.DisableOutputWindow(null);
+  }
+  // -----------------------------------------------------------------
+	
+  public static void main(String s[]) 
+  {					
+    vtkNamedColors colors = new vtkNamedColors();
+
+    //For Actor Color
+    double actorColor[] = new double[4];
+    //For Cursor Actor Color
+    double CursorActorColor[] = new double[4];
+    //Renderer Background Color
+     double Bgcolor[] = new double[4];
+
+    colors.GetColor("LightPink", actorColor);
+    colors.GetColor("Brown", CursorActorColor);
+    colors.GetColor("MediumSpringGreen", Bgcolor);
+
+    //Create a Sphere
+    vtkSphereSource Sphere = new vtkSphereSource();
+    Sphere.SetCenter(0.0,0.0,0.0);
+    Sphere.SetRadius(5.0);
+    Sphere.Update();
+
+    //Create a Mapper and Actor
+    vtkPolyDataMapper Mapper = new vtkPolyDataMapper();
+    Mapper.SetInputConnection(Sphere.GetOutputPort());
+
+    vtkActor Actor = new vtkActor();
+    Actor.SetMapper(Mapper);
+    Actor.GetProperty().SetColor(actorColor);
+
+    // Create the renderer, render window and interactor.
+    vtkRenderer ren = new vtkRenderer();
+    vtkRenderWindow renWin = new vtkRenderWindow();
+    renWin.AddRenderer(ren);
+    vtkRenderWindowInteractor iren = new vtkRenderWindowInteractor();
+    iren.SetRenderWindow(renWin);
+
+    // Visualise the actor
+    ren.AddActor(Actor);
+    ren.SetBackground(Bgcolor);
+
+    vtkCursor3D Cursor = new vtkCursor3D();
+    Cursor.SetModelBounds(-10, 10, -10, 10, -10, 10);
+    Cursor.AllOn();
+    Cursor.OutlineOff();
+    Cursor.Update();
+
+    vtkPolyDataMapper CursorMapper = new vtkPolyDataMapper();
+    CursorMapper.SetInputConnection(Cursor.GetOutputPort());
+    vtkActor CursorActor = new vtkActor();
+    CursorActor.SetMapper(CursorMapper);
+    CursorActor.GetProperty().SetColor(CursorActorColor);
+    ren.AddActor(CursorActor);
+
+    ren.ResetCamera();
+    iren.Start();		
+  }		  
+}

src/Java/Visualization/Cursor3D.md

+### Description
+
+vtkCursor3D is an object that generates 3D representation of a cursor. 
+
+The cursor consists of a wireframe bounding box, three intersecting axes lines that meet at the cursor focus, and "shadows" or projections of the axes against the sides of the bounding box. Each of these components can be turned on/off.