You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
78 lines
2.4 KiB
78 lines
2.4 KiB
2 years ago
|
# This example demonstrates the subsampling of a structured grid.
|
||
|
|
|
||
|
|
#
|
||
|
|
# First we include the VTK Tcl packages which will make available
|
||
|
|
# all of the vtk commands from Tcl. The vtkinteraction package defines
|
||
|
|
# a simple Tcl/Tk interactor widget.
|
||
|
|
#
|
||
|
|
package require vtk
|
||
|
|
package require vtkinteraction
|
||
|
|
|
||
|
|
# Read some structured data.
|
||
|
|
#
|
||
|
|
vtkPLOT3DReader pl3d
|
||
|
|
pl3d SetXYZFileName "$VTK_DATA_ROOT/Data/combxyz.bin"
|
||
|
|
pl3d SetQFileName "$VTK_DATA_ROOT/Data/combq.bin"
|
||
|
|
pl3d SetScalarFunctionNumber 100
|
||
|
|
pl3d SetVectorFunctionNumber 202
|
||
|
|
pl3d Update
|
||
|
|
|
||
|
|
# Here we subsample the grid. The SetVOI method requires six values
|
||
|
|
# specifying (imin,imax, jmin,jmax, kmin,kmax) extents. In this example
|
||
|
|
# we extracting a plane. Note that the VOI is clamped to zero (min) and
|
||
|
|
# the maximum i-j-k value; that way we can use the -1000,1000 specification
|
||
|
|
# and be sure the values are clamped. The SampleRate specifies that we take
|
||
|
|
# every point in the i-direction; every other point in the j-direction; and
|
||
|
|
# every third point in the k-direction. IncludeBoundaryOn makes sure that we
|
||
|
|
# get the boundary points even if the SampleRate does not coincident with
|
||
|
|
# the boundary.
|
||
|
|
#
|
||
|
|
vtkExtractGrid extract
|
||
|
|
extract SetInputConnection [pl3d GetOutputPort]
|
||
|
|
extract SetVOI 30 30 -1000 1000 -1000 1000
|
||
|
|
extract SetSampleRate 1 2 3
|
||
|
|
extract IncludeBoundaryOn
|
||
|
|
vtkDataSetMapper mapper
|
||
|
|
mapper SetInputConnection [extract GetOutputPort]
|
||
|
|
mapper SetScalarRange .18 .7
|
||
|
|
vtkActor actor
|
||
|
|
actor SetMapper mapper
|
||
|
|
|
||
|
|
vtkStructuredGridOutlineFilter outline
|
||
|
|
outline SetInputConnection [pl3d GetOutputPort]
|
||
|
|
vtkPolyDataMapper outlineMapper
|
||
|
|
outlineMapper SetInputConnection [outline GetOutputPort]
|
||
|
|
vtkActor outlineActor
|
||
|
|
outlineActor SetMapper outlineMapper
|
||
|
|
[outlineActor GetProperty] SetColor 0 0 0
|
||
|
|
|
||
|
|
# Add the usual rendering stuff.
|
||
|
|
#
|
||
|
|
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 outlineActor
|
||
|
|
ren1 AddActor actor
|
||
|
|
|
||
|
|
ren1 SetBackground 1 1 1
|
||
|
|
renWin SetSize 300 180
|
||
|
|
|
||
|
|
set cam1 [ren1 GetActiveCamera]
|
||
|
|
$cam1 SetClippingRange 2.64586 47.905
|
||
|
|
$cam1 SetFocalPoint 8.931 0.358127 31.3526
|
||
|
|
$cam1 SetPosition 29.7111 -0.688615 37.1495
|
||
|
|
$cam1 SetViewUp -0.268328 0.00801595 0.963294
|
||
|
|
|
||
|
|
# render the image
|
||
|
|
#
|
||
|
|
iren AddObserver UserEvent {wm deiconify .vtkInteract}
|
||
|
|
renWin Render
|
||
|
|
|
||
|
|
# prevent the tk window from showing up then start the event loop
|
||
|
|
wm withdraw .
|