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95 lines
3.6 KiB
95 lines
3.6 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkTextureMapToSphere.h,v $
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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// .NAME vtkTextureMapToSphere - generate texture coordinates by mapping points to sphere
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// .SECTION Description
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// vtkTextureMapToSphere is a filter that generates 2D texture coordinates by
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// mapping input dataset points onto a sphere. The sphere can either be user
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// specified or generated automatically. (The sphere is generated
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// automatically by computing the center (i.e., averaged coordinates) of the
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// sphere.) Note that the generated texture coordinates range between
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// (0,1). The s-coordinate lies in the angular direction around the z-axis,
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// measured counter-clockwise from the x-axis. The t-coordinate lies in the
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// angular direction measured down from the north pole towards the south
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// pole.
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//
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// A special ivar controls how the s-coordinate is generated. If PreventSeam
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// is set to true, the s-texture varies from 0->1 and then 1->0 (corresponding
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// to angles of 0->180 and 180->360).
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// .SECTION Caveats
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// The resulting texture coordinates will lie between (0,1), and the texture
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// coordinates are determined with respect to the modeler's x-y-z coordinate
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// system. Use the class vtkTransformTextureCoords to linearly scale and
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// shift the origin of the texture coordinates (if necessary).
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// .SECTION See Also
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// vtkTextureMapToPlane vtkTextureMapToCylinder vtkTextureMapToBox
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// vtkTransformTexture vtkThresholdTextureCoords
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#ifndef __vtkTextureMapToSphere_h
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#define __vtkTextureMapToSphere_h
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#include "vtkDataSetAlgorithm.h"
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class VTK_GRAPHICS_EXPORT vtkTextureMapToSphere : public vtkDataSetAlgorithm
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{
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public:
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vtkTypeRevisionMacro(vtkTextureMapToSphere,vtkDataSetAlgorithm);
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void PrintSelf(ostream& os, vtkIndent indent);
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// Description:
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// Create object with Center (0,0,0) and the PreventSeam ivar is set to
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// true. The sphere center is automatically computed.
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static vtkTextureMapToSphere *New();
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// Description:
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// Specify a point defining the center of the sphere.
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vtkSetVector3Macro(Center,double);
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vtkGetVectorMacro(Center,double,3);
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// Description:
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// Turn on/off automatic sphere generation. This means it automatically
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// finds the sphere center.
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vtkSetMacro(AutomaticSphereGeneration,int);
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vtkGetMacro(AutomaticSphereGeneration,int);
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vtkBooleanMacro(AutomaticSphereGeneration,int);
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// Description:
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// Control how the texture coordinates are generated. If PreventSeam is
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// set, the s-coordinate ranges from 0->1 and 1->0 corresponding to the
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// theta angle variation between 0->180 and 180->0 degrees. Otherwise, the
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// s-coordinate ranges from 0->1 between 0->360 degrees.
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vtkSetMacro(PreventSeam,int);
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vtkGetMacro(PreventSeam,int);
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vtkBooleanMacro(PreventSeam,int);
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protected:
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vtkTextureMapToSphere();
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~vtkTextureMapToSphere() {};
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int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
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double Center[3];
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int AutomaticSphereGeneration;
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int PreventSeam;
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private:
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vtkTextureMapToSphere(const vtkTextureMapToSphere&); // Not implemented.
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void operator=(const vtkTextureMapToSphere&); // Not implemented.
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};
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#endif
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