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package require vtk
package require vtkinteraction
# Generate random planes to form a convex polyhedron.
# Create a polyhedral representation of the planes.
# get the interactor ui
# create some points laying between 1<=r<5 (r is radius)
# the points also have normals pointing away from the origin.
#
vtkMath mathObj
vtkPoints points
vtkFloatArray normals
normals SetNumberOfComponents 3
for {set i 0} {$i<100} {incr i 1} {
set radius 1.0
set theta [mathObj Random 0 360]
set phi [mathObj Random 0 180]
set x [expr $radius*sin($phi)*cos($theta)]
set y [expr $radius*sin($phi)*sin($theta)]
set z [expr $radius*cos($phi)]
eval points InsertPoint $i $x $y $z
eval normals InsertTuple3 $i $x $y $z
}
vtkPlanes planes
planes SetPoints points
planes SetNormals normals
vtkSphereSource ss
vtkHull hull
hull SetPlanes planes
vtkPolyData pd
hull GenerateHull pd -20 20 -20 20 -20 20
# triangulate them
#
vtkPolyDataMapper mapHull
mapHull SetInput pd
vtkActor hullActor
hullActor SetMapper mapHull
# 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 hullActor
renWin SetSize 250 250
# 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 .
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