Difference between revisions of "VTK/Examples/Python/GeometricObjects/ParametricObjects"

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==ParametricObjectsDemo.py==
+
==ParametricObjects.py==
 
See [http://www.vtk.org/VTK/img/ParametricSurfaces.pdf Parametric Equations for Surfaces] by Andrew Maclean for an excellent description of these beautiful parametric surfaces.
 
See [http://www.vtk.org/VTK/img/ParametricSurfaces.pdf Parametric Equations for Surfaces] by Andrew Maclean for an excellent description of these beautiful parametric surfaces.
  

Revision as of 02:07, 5 July 2014

ParametricObjects.py

See Parametric Equations for Surfaces by Andrew Maclean for an excellent description of these beautiful parametric surfaces.

You can edit the following code removing unnecessary objects if you so desire.

#!/usr/bin/env python

import vtk
import random

class ParametricObjects():

    def ParametricObjects(self):

        parametricObjects = list()
        parametricObjects.append(vtk.vtkParametricBoy())
        parametricObjects.append(vtk.vtkParametricConicSpiral())
        parametricObjects.append(vtk.vtkParametricCrossCap())
        parametricObjects.append(vtk.vtkParametricDini())

        parametricObjects.append(vtk.vtkParametricEllipsoid())
        parametricObjects[-1].SetXRadius(0.5)
        parametricObjects[-1].SetYRadius(2.0)
        parametricObjects.append(vtk.vtkParametricEnneper())
        parametricObjects.append(vtk.vtkParametricFigure8Klein())
        parametricObjects.append(vtk.vtkParametricKlein())

        parametricObjects.append(vtk.vtkParametricMobius())
        parametricObjects[-1].SetRadius(2)
        parametricObjects[-1].SetMinimumV(-0.5)
        parametricObjects[-1].SetMaximumV(0.5)
        parametricObjects.append(vtk.vtkParametricRandomHills())
        parametricObjects[-1].AllowRandomGenerationOff()
        parametricObjects.append(vtk.vtkParametricRoman())
        parametricObjects.append(vtk.vtkParametricSuperEllipsoid())
        parametricObjects[-1].SetN1(0.5)
        parametricObjects[-1].SetN2(0.1)

        parametricObjects.append(vtk.vtkParametricSuperToroid())
        parametricObjects[-1].SetN1(0.2)
        parametricObjects[-1].SetN2(3.0)
        parametricObjects.append(vtk.vtkParametricTorus())
        parametricObjects.append(vtk.vtkParametricSpline())
        # Add some points to the parametric spline.
        inputPoints = vtk.vtkPoints()
        vtk.vtkMath.RandomSeed(8775070)
        for i in range(10):
            x = vtk.vtkMath.Random(0.0,1.0)
            y = vtk.vtkMath.Random(0.0,1.0)
            z = vtk.vtkMath.Random(0.0,1.0)
            inputPoints.InsertNextPoint(x, y, z)
        parametricObjects[-1].SetPoints(inputPoints)

        # There are only 15 objects.
        parametricFunctionSources = list()
        renderers = list()
        mappers = list()
        actors = list()
        textmappers = list()
        textactors = list()

        # Create a common text property.
        textProperty = vtk.vtkTextProperty()
        textProperty.SetFontSize(10)
        textProperty.SetJustificationToCentered()

        # Create a parametric function source, renderer, mapper
        # and actor for each object.
        for idx, item in enumerate(parametricObjects):
            parametricFunctionSources.append(vtk.vtkParametricFunctionSource())
            parametricFunctionSources[idx].SetParametricFunction(item)
            parametricFunctionSources[idx].Update()

            mappers.append(vtk.vtkPolyDataMapper())
            mappers[idx].SetInputConnection(parametricFunctionSources[idx].GetOutputPort())

            actors.append(vtk.vtkActor())
            actors[idx].SetMapper(mappers[idx])

            textmappers.append(vtk.vtkTextMapper())
            textmappers[idx].SetInput(item.GetClassName())
            textmappers[idx].SetTextProperty(textProperty)

            textactors.append(vtk.vtkActor2D())
            textactors[idx].SetMapper(textmappers[idx])
            textactors[idx].SetPosition(100, 16)

            renderers.append(vtk.vtkRenderer())

        gridDimensions = 4

        for idx in range(len(parametricObjects)):
            if idx < gridDimensions * gridDimensions:
                renderers.append(vtk.vtkRenderer)

        rendererSize = 200

        # Create the RenderWindow
        #
        renderWindow = vtk.vtkRenderWindow()
        renderWindow.SetSize(rendererSize * gridDimensions, rendererSize * gridDimensions)

        # Add and position the renders to the render window.
        viewport = list()
        for row in range(gridDimensions):
            for col in range(gridDimensions):
                idx = row * gridDimensions + col

                viewport[:] = []
                viewport.append(float(col) * rendererSize / (gridDimensions * rendererSize))
                viewport.append(float(gridDimensions - (row+1)) * rendererSize / (gridDimensions * rendererSize))
                viewport.append(float(col+1)*rendererSize / (gridDimensions * rendererSize))
                viewport.append(float(gridDimensions - row) * rendererSize / (gridDimensions * rendererSize))

                if idx > (len(parametricObjects) - 1):
                    continue

                renderers[idx].SetViewport(viewport)
                renderWindow.AddRenderer(renderers[idx])

                renderers[idx].AddActor(actors[idx])
                renderers[idx].AddActor(textactors[idx])
                renderers[idx].SetBackground(0.2,0.3,0.4)
                renderers[idx].ResetCamera()
                renderers[idx].GetActiveCamera().Azimuth(30)
                renderers[idx].GetActiveCamera().Elevation(-30)
                renderers[idx].GetActiveCamera().Zoom(0.9)
                renderers[idx].ResetCameraClippingRange()

        interactor = vtk.vtkRenderWindowInteractor()
        interactor.SetRenderWindow(renderWindow)

        renderWindow.Render()

        interactor.Start()

if __name__ == "__main__":
    po = ParametricObjects()
    po.ParametricObjects()