/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkArcPlotter.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.

=========================================================================*/
/**
 * @class   vtkArcPlotter
 * @brief   plot data along an arbitrary polyline
 *
 * vtkArcPlotter performs plotting of attribute data along polylines defined
 * with an input vtkPolyData data object. Any type of attribute data can be
 * plotted including scalars, vectors, tensors, normals, texture coordinates,
 * and field data. Either one or multiple data components can be plotted.
 *
 * To use this class you must specify an input data set that contains one or
 * more polylines, and some attribute data including which component of the
 * attribute data. (By default, this class processes the first component of
 * scalar data.) You will also need to set an offset radius (the distance
 * of the polyline to the median line of the plot), a width for the plot
 * (the distance that the minimum and maximum plot values are mapped into),
 * an possibly an offset (used to offset attribute data with multiple
 * components).
 *
 * Normally the filter automatically computes normals for generating the
 * offset arc plot. However, you can specify a default normal and use that
 * instead.
 *
 * @sa
 * vtkXYPlotActor
*/

#ifndef vtkArcPlotter_h
#define vtkArcPlotter_h

#include "vtkRenderingAnnotationModule.h" // For export macro
#include "vtkPolyDataAlgorithm.h"

#define VTK_PLOT_SCALARS    1
#define VTK_PLOT_VECTORS    2
#define VTK_PLOT_NORMALS    3
#define VTK_PLOT_TCOORDS    4
#define VTK_PLOT_TENSORS    5
#define VTK_PLOT_FIELD_DATA 6

class vtkCamera;
class vtkDataArray;
class vtkPointData;
class vtkPoints;

class VTKRENDERINGANNOTATION_EXPORT vtkArcPlotter : public vtkPolyDataAlgorithm
{
public:
  /**
   * Instantiate with no default camera and plot mode set to
   * VTK_SCALARS.
   */
  static vtkArcPlotter *New();

  vtkTypeMacro(vtkArcPlotter,vtkPolyDataAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) VTK_OVERRIDE;

  //@{
  /**
   * Specify a camera used to orient the plot along the arc. If no camera
   * is specified, then the orientation of the plot is arbitrary.
   */
  virtual void SetCamera(vtkCamera*);
  vtkGetObjectMacro(Camera,vtkCamera);
  //@}

  //@{
  /**
   * Specify which data to plot: scalars, vectors, normals, texture coords,
   * tensors, or field data. If the data has more than one component, use
   * the method SetPlotComponent to control which component to plot.
   */
  vtkSetMacro(PlotMode, int);
  vtkGetMacro(PlotMode, int);
  void SetPlotModeToPlotScalars() {this->SetPlotMode(VTK_PLOT_SCALARS);};
  void SetPlotModeToPlotVectors() {this->SetPlotMode(VTK_PLOT_VECTORS);};
  void SetPlotModeToPlotNormals() {this->SetPlotMode(VTK_PLOT_NORMALS);};
  void SetPlotModeToPlotTCoords() {this->SetPlotMode(VTK_PLOT_TCOORDS);};
  void SetPlotModeToPlotTensors() {this->SetPlotMode(VTK_PLOT_TENSORS);};
  void SetPlotModeToPlotFieldData()
            {this->SetPlotMode(VTK_PLOT_FIELD_DATA);};
  //@}

  //@{
  /**
   * Set/Get the component number to plot if the data has more than one
   * component. If the value of the plot component is == (-1), then all
   * the components will be plotted.
   */
  vtkSetMacro(PlotComponent,int);
  vtkGetMacro(PlotComponent,int);
  //@}

  //@{
  /**
   * Set the radius of the "median" value of the first plotted component.
   */
  vtkSetClampMacro(Radius,double,0.0,VTK_FLOAT_MAX);
  vtkGetMacro(Radius,double);
  //@}

  //@{
  /**
   * Set the height of the plot. (The radius combined with the height
   * define the location of the plot relative to the generating polyline.)
   */
  vtkSetClampMacro(Height,double,0.0,VTK_FLOAT_MAX);
  vtkGetMacro(Height,double);
  //@}

  //@{
  /**
   * Specify an offset that translates each subsequent plot (if there is
   * more than one component plotted) from the defining arc (i.e., polyline).
   */
  vtkSetClampMacro(Offset, double, 0.0, VTK_FLOAT_MAX);
  vtkGetMacro(Offset, double);
  //@}

  //@{
  /**
   * Set a boolean to control whether to use default normals.
   * By default, normals are automatically computed from the generating
   * polyline and camera.
   */
  vtkSetMacro(UseDefaultNormal,int);
  vtkGetMacro(UseDefaultNormal,int);
  vtkBooleanMacro(UseDefaultNormal,int);
  //@}

  //@{
  /**
   * Set the default normal to use if you do not wish automatic normal
   * calculation. The arc plot will be generated using this normal.
   */
  vtkSetVector3Macro(DefaultNormal,float);
  vtkGetVectorMacro(DefaultNormal,float,3);
  //@}

  //@{
  /**
   * Set/Get the field data array to plot. This instance variable is
   * only applicable if field data is plotted.
   */
  vtkSetClampMacro(FieldDataArray,int,0,VTK_INT_MAX);
  vtkGetMacro(FieldDataArray,int);
  //@}

  /**
   * New GetMTime because of camera dependency.
   */
  vtkMTimeType GetMTime() VTK_OVERRIDE;

protected:
  vtkArcPlotter();
  ~vtkArcPlotter() VTK_OVERRIDE;

  int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *) VTK_OVERRIDE;
  int  OffsetPoint(vtkIdType ptId, vtkPoints *inPts, double n[3],
                   vtkPoints *newPts, double offset,
                   double *range, double val);
  int  ProcessComponents(vtkIdType numPts, vtkPointData *pd);

  vtkCamera *Camera;
  int       PlotMode;
  int       PlotComponent;
  double     Radius;
  double     Height;
  double     Offset;
  float     DefaultNormal[3];
  int       UseDefaultNormal;
  int       FieldDataArray;

private:
  vtkDataArray *Data;
  double    *DataRange;
  double   *Tuple;
  int       NumberOfComponents;
  int       ActiveComponent;
  int       StartComp;
  int       EndComp;

private:
  vtkArcPlotter(const vtkArcPlotter&) VTK_DELETE_FUNCTION;
  void operator=(const vtkArcPlotter&) VTK_DELETE_FUNCTION;
};

#endif
