Tutorial Step1
Repository source: Tutorial_Step1
Description¶
This example creates a polygonal model of a cone, and then renders it to the screen. It will rotate the cone 360 degrees and then exit. The basic setup of source -> mapper -> actor -> renderer -> renderwindow
is typical of most VTK programs.
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Question
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Code¶
Tutorial_Step1.py
#!/usr/bin/env python
"""
=========================================================================
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
"""
# First access the VTK module (and any other needed modules) by importing them.
# noinspection PyUnresolvedReferences
import vtkmodules.vtkInteractionStyle
# noinspection PyUnresolvedReferences
import vtkmodules.vtkRenderingOpenGL2
from vtkmodules.vtkCommonColor import vtkNamedColors
from vtkmodules.vtkFiltersSources import vtkConeSource
from vtkmodules.vtkRenderingCore import (
vtkActor,
vtkPolyDataMapper,
vtkRenderWindow,
vtkRenderer
)
def main(argv):
#
# Next we create an instance of vtkNamedColors and we will use
# this to select colors for the object and background.
#
colors = vtkNamedColors()
#
# Now we create an instance of vtkConeSource and set some of its
# properties. The instance of vtkConeSource "cone" is part of a
# visualization pipeline (it is a source process object) it produces data
# (output type is vtkPolyData) which other filters may process.
#
cone = vtkConeSource()
cone.SetHeight(3.0)
cone.SetRadius(1.0)
cone.SetResolution(10)
#
# In this example we terminate the pipeline with a mapper process object.
# (Intermediate filters such as vtkShrinkPolyData could be inserted in
# between the source and the mapper.) We create an instance of
# vtkPolyDataMapper to map the polygonal data into graphics primitives. We
# connect the output of the cone source to the input of this mapper.
#
coneMapper = vtkPolyDataMapper()
coneMapper.SetInputConnection(cone.GetOutputPort())
#
# Create an actor to represent the cone. The actor orchestrates rendering
# of the mapper's graphics primitives. An actor also refers to properties
# via a vtkProperty instance, and includes an internal transformation
# matrix. We set this actor's mapper to be coneMapper which we created
# above.
#
coneActor = vtkActor()
coneActor.SetMapper(coneMapper)
coneActor.GetProperty().SetColor(colors.GetColor3d('MistyRose'))
#
# Create the Renderer and assign actors to it. A renderer is like a
# viewport. It is part or all of a window on the screen and it is
# responsible for drawing the actors it has. We also set the background
# color here.
#
ren1 = vtkRenderer()
ren1.AddActor(coneActor)
ren1.SetBackground(colors.GetColor3d('MidnightBlue'))
# Finally we create the render window which will show up on the screen.
# We put our renderer into the render window using AddRenderer. We also
# set the size to be 300 pixels by 300.
#
renWin = vtkRenderWindow()
renWin.AddRenderer(ren1)
renWin.SetSize(300, 300)
renWin.SetWindowName('Tutorial_Step1')
#
# Now we loop over 360 degrees and render the cone each time.
#
for i in range(0, 360):
# Render the image
renWin.Render()
# Rotate the active camera by one degree.
ren1.GetActiveCamera().Azimuth(1)
if __name__ == '__main__':
import sys
main(sys.argv)