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115 lines
3.8 KiB
C
115 lines
3.8 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkTextureMapToSphere.h
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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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/**
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* @class vtkTextureMapToSphere
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* @brief generate texture coordinates by mapping points to sphere
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*
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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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*
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* @warning
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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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*
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* @sa
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* vtkTextureMapToPlane vtkTextureMapToCylinder
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* vtkTransformTexture vtkThresholdTextureCoords
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*/
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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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#include "vtkFiltersTextureModule.h" // For export macro
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class vtkDataSet;
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class VTKFILTERSTEXTURE_EXPORT vtkTextureMapToSphere : public vtkDataSetAlgorithm
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{
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public:
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vtkTypeMacro(vtkTextureMapToSphere, vtkDataSetAlgorithm);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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/**
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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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*/
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static vtkTextureMapToSphere* New();
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//@{
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/**
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* Specify a point defining the center of the sphere.
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*/
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vtkSetVector3Macro(Center, double);
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vtkGetVectorMacro(Center, double, 3);
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//@}
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//@{
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/**
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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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*/
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vtkSetMacro(AutomaticSphereGeneration, vtkTypeBool);
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vtkGetMacro(AutomaticSphereGeneration, vtkTypeBool);
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vtkBooleanMacro(AutomaticSphereGeneration, vtkTypeBool);
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//@}
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//@{
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/**
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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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*/
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vtkSetMacro(PreventSeam, vtkTypeBool);
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vtkGetMacro(PreventSeam, vtkTypeBool);
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vtkBooleanMacro(PreventSeam, vtkTypeBool);
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//@}
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/*
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* Computes the center point of the data set if AutomaticSphereGeneration is set to true.
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*/
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virtual void ComputeCenter(vtkDataSet* input);
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protected:
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vtkTextureMapToSphere();
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~vtkTextureMapToSphere() override {}
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int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
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double Center[3];
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vtkTypeBool AutomaticSphereGeneration;
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vtkTypeBool PreventSeam;
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private:
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vtkTextureMapToSphere(const vtkTextureMapToSphere&) = delete;
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void operator=(const vtkTextureMapToSphere&) = delete;
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};
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#endif
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