# This example demonstrates how to use 2D Delaunay triangulation.
# We create a fancy image of a 2D Delaunay triangulation. Points are 
# randomly generated.


# first we load in the standard vtk packages into tcl
package require vtk
package require vtkinteraction
package require vtktesting

# Generate some random points
#
vtkMath math
vtkPoints points
for {set i 0} {$i<50} {incr i 1} {
    eval points InsertPoint $i [math Random 0 1] [math Random 0 1] 0.0
}

# Create a polydata with the points we just created.
vtkPolyData profile
    profile SetPoints points

# Perform a 2D Delaunay triangulation on them.
#
vtkDelaunay2D del
    del SetInput profile
    del SetTolerance 0.001
vtkPolyDataMapper mapMesh
    mapMesh SetInputConnection [del GetOutputPort]
vtkActor meshActor
    meshActor SetMapper mapMesh
    eval [meshActor GetProperty] SetColor .1 .2 .4

# We will now create a nice looking mesh by wrapping the edges in tubes,
# and putting fat spheres at the points.
vtkExtractEdges extract
    extract SetInputConnection [del GetOutputPort]
vtkTubeFilter tubes
    tubes SetInputConnection [extract GetOutputPort]
    tubes SetRadius 0.01
    tubes SetNumberOfSides 6
vtkPolyDataMapper mapEdges
    mapEdges SetInputConnection [tubes GetOutputPort]
vtkActor edgeActor
    edgeActor SetMapper mapEdges
eval [edgeActor GetProperty] SetColor $peacock
    [edgeActor GetProperty] SetSpecularColor 1 1 1
    [edgeActor GetProperty] SetSpecular 0.3
    [edgeActor GetProperty] SetSpecularPower 20
    [edgeActor GetProperty] SetAmbient 0.2
    [edgeActor GetProperty] SetDiffuse 0.8

vtkSphereSource ball
    ball SetRadius 0.025
    ball SetThetaResolution 12
    ball SetPhiResolution 12
vtkGlyph3D balls
    balls SetInputConnection [del GetOutputPort]
    balls SetSourceConnection [ball GetOutputPort]
vtkPolyDataMapper mapBalls
    mapBalls SetInputConnection [balls GetOutputPort]
vtkActor ballActor
    ballActor SetMapper mapBalls
    eval [ballActor GetProperty] SetColor $hot_pink
    [ballActor GetProperty] SetSpecularColor 1 1 1
    [ballActor GetProperty] SetSpecular 0.3
    [ballActor GetProperty] SetSpecularPower 20
    [ballActor GetProperty] SetAmbient 0.2
    [ballActor GetProperty] SetDiffuse 0.8

# Create graphics objects
# Create the rendering window, renderer, and interactive renderer
vtkRenderer ren1
vtkRenderWindow renWin
    renWin AddRenderer ren1
vtkRenderWindowInteractor iren
    iren SetRenderWindow renWin

# Add the actors to the renderer, set the background and size
ren1 AddActor ballActor
ren1 AddActor edgeActor
ren1 SetBackground 1 1 1
renWin SetSize 150 150

# render the image
#
iren AddObserver UserEvent {wm deiconify .vtkInteract}
ren1 ResetCamera
[ren1 GetActiveCamera] Zoom 1.5
iren Initialize

# prevent the tk window from showing up then start the event loop
wm withdraw .