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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
/**
* @class vtkPath
* @brief concrete dataset representing a path defined by Bezier
* curves.
*
* vtkPath provides a container for paths composed of line segments,
* 2nd-order (quadratic) and 3rd-order (cubic) Bezier curves.
*/
#ifndef vtkPath_h
#define vtkPath_h
#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkPointSet.h"
VTK_ABI_NAMESPACE_BEGIN
class vtkIntArray;
class VTKCOMMONDATAMODEL_EXPORT vtkPath : public vtkPointSet
{
public:
static vtkPath* New();
vtkTypeMacro(vtkPath, vtkPointSet);
void PrintSelf(ostream& os, vtkIndent indent) override;
/**
* Return what type of dataset this is.
*/
int GetDataObjectType() override { return VTK_PATH; }
/**
* Enumeration of recognized control point types:
* - MOVE_TO: Point defining the origin of a new segment, not connected to
* the previous point.
* - LINE_TO: Draw a line from the previous point to the current one
* - CONIC_CURVE: 2nd order (conic/quadratic) point. Must appear
* in sets of 2, e.g. (0,0) MOVE_TO (0,1) CONIC_CURVE (1,2) CONIC_CURVE
* defines a quadratic Bezier curve that passes through (0,0) and (1,2)
* using (0,1) as a control (off) point.
* - CUBIC_CURVE: 3rd order (cubic) control point. Must appear in sets of
* 3, e.g. (0,0) MOVE_TO (0,1) CUBIC_CURVE (1,2) CUBIC_CURVE (4,0)
* CUBIC_CURVE defines a cubic Bezier curve that passes through (0,0)
* and (4,0), using (0,1) and (1,2) as control (off) points.
*/
enum ControlPointType
{
MOVE_TO = 0,
LINE_TO,
CONIC_CURVE,
CUBIC_CURVE
};
///@{
/**
* Insert the next control point in the path.
*/
void InsertNextPoint(float pts[3], int code);
void InsertNextPoint(double pts[3], int code);
void InsertNextPoint(double x, double y, double z, int code);
///@}
///@{
/**
* Set/Get the array of control point codes:
*/
void SetCodes(vtkIntArray*);
vtkIntArray* GetCodes();
///@}
/**
* vtkPath doesn't use cells. These methods return trivial values.
*/
vtkIdType GetNumberOfCells() override { return 0; }
using vtkDataSet::GetCell;
vtkCell* GetCell(vtkIdType) override { return nullptr; }
void GetCell(vtkIdType, vtkGenericCell*) override;
int GetCellType(vtkIdType) override { return 0; }
/**
* vtkPath doesn't use cells, this method just clears ptIds.
*/
void GetCellPoints(vtkIdType, vtkIdList* ptIds) override;
/**
* vtkPath doesn't use cells, this method just clears cellIds.
*/
void GetPointCells(vtkIdType ptId, vtkIdList* cellIds) override;
/**
* Return the maximum cell size in this poly data.
*/
int GetMaxCellSize() override { return 0; }
/**
* Method allocates initial storage for points. Use this method before the
* method vtkPath::InsertNextPoint().
*/
void Allocate(vtkIdType size = 1000, int extSize = 1000);
/**
* Begin inserting data all over again. Memory is not freed but otherwise
* objects are returned to their initial state.
*/
void Reset();
///@{
/**
* Retrieve an instance of this class from an information object.
*/
static vtkPath* GetData(vtkInformation* info);
static vtkPath* GetData(vtkInformationVector* v, int i = 0);
///@}
protected:
vtkPath();
~vtkPath() override;
private:
vtkPath(const vtkPath&) = delete;
void operator=(const vtkPath&) = delete;
};
VTK_ABI_NAMESPACE_END
#endif
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