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/*=========================================================================
Program: Visualization Toolkit
Module: vtkTextureMapToCylinder.h
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.
=========================================================================*/
// .NAME vtkTextureMapToCylinder - generate texture coordinates by mapping points to cylinder
// .SECTION Description
// vtkTextureMapToCylinder is a filter that generates 2D texture coordinates
// by mapping input dataset points onto a cylinder. The cylinder can either be
// user specified or generated automatically. (The cylinder is generated
// automatically by computing the axis of the cylinder.) Note that the
// generated texture coordinates for the s-coordinate ranges from (0-1)
// (corresponding to angle of 0->360 around axis), while the mapping of
// the t-coordinate is controlled by the projection of points along the axis.
//
// To specify a cylinder manually, you must provide two points that
// define the axis of the cylinder. The length of the axis will affect the
// t-coordinates.
//
// A special ivar controls how the s-coordinate is generated. If PreventSeam
// is set to true, the s-texture varies from 0->1 and then 1->0 (corresponding
// to angles of 0->180 and 180->360).
// .SECTION Caveats
// Since the resulting texture s-coordinate will lie between (0,1), and the
// origin of the texture coordinates is not user-controllable, you may want
// to use the class vtkTransformTexture to linearly scale and shift the origin
// of the texture coordinates.
// .SECTION See Also
// vtkTextureMapToPlane vtkTextureMapToSphere
// vtkTransformTexture vtkThresholdTextureCoords
#ifndef __vtkTextureMapToCylinder_h
#define __vtkTextureMapToCylinder_h
#include "vtkDataSetAlgorithm.h"
class VTK_GRAPHICS_EXPORT vtkTextureMapToCylinder : public vtkDataSetAlgorithm
{
public:
vtkTypeMacro(vtkTextureMapToCylinder,vtkDataSetAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Create object with cylinder axis parallel to z-axis (points (0,0,-0.5)
// and (0,0,0.5)). The PreventSeam ivar is set to true. The cylinder is
// automatically generated.
static vtkTextureMapToCylinder *New();
// Description:
// Specify the first point defining the cylinder axis,
vtkSetVector3Macro(Point1,double);
vtkGetVectorMacro(Point1,double,3);
// Description:
// Specify the second point defining the cylinder axis,
vtkSetVector3Macro(Point2,double);
vtkGetVectorMacro(Point2,double,3);
// Description:
// Turn on/off automatic cylinder generation. This means it automatically
// finds the cylinder center and axis.
vtkSetMacro(AutomaticCylinderGeneration,int);
vtkGetMacro(AutomaticCylinderGeneration,int);
vtkBooleanMacro(AutomaticCylinderGeneration,int);
// Description:
// Control how the texture coordinates are generated. If PreventSeam is
// set, the s-coordinate ranges from 0->1 and 1->0 corresponding to the
// angle variation from 0->180 and 180->0. Otherwise, the s-coordinate
// ranges from 0->1 from 0->360 degrees.
vtkSetMacro(PreventSeam,int);
vtkGetMacro(PreventSeam,int);
vtkBooleanMacro(PreventSeam,int);
protected:
vtkTextureMapToCylinder();
~vtkTextureMapToCylinder() {};
int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
double Point1[3];
double Point2[3];
int AutomaticCylinderGeneration;
int PreventSeam;
private:
vtkTextureMapToCylinder(const vtkTextureMapToCylinder&); // Not implemented.
void operator=(const vtkTextureMapToCylinder&); // Not implemented.
};
#endif
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