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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
/**
* @class vtkLinearExtrusionFilter
* @brief sweep polygonal data creating a "skirt" from free edges and lines, and lines from
* vertices
*
* vtkLinearExtrusionFilter is a modeling filter. It takes polygonal data as
* input and generates polygonal data on output. The input dataset is swept
* according to some extrusion function and creates new polygonal primitives.
* These primitives form a "skirt" or swept surface. For example, sweeping a
* line results in a quadrilateral, and sweeping a triangle creates a "wedge".
*
* There are a number of control parameters for this filter. You can
* control whether the sweep of a 2D object (i.e., polygon or triangle strip)
* is capped with the generating geometry via the "Capping" ivar. Also, you
* can extrude in the direction of a user specified vector, towards a point,
* or in the direction of vertex normals (normals must be provided - use
* vtkPolyDataNormals if necessary). The amount of extrusion is controlled by
* the "ScaleFactor" instance variable.
*
* The skirt is generated by locating certain topological features. Free
* edges (edges of polygons or triangle strips only used by one polygon or
* triangle strips) generate surfaces. This is true also of lines or
* polylines. Vertices generate lines.
*
* This filter can be used to create 3D fonts, 3D irregular bar charts,
* or to model 2 1/2D objects like punched plates. It also can be used to
* create solid objects from 2D polygonal meshes.
*
* @warning
* Some polygonal objects have no free edges (e.g., sphere). When swept,
* this will result in two separate surfaces if capping is on, or no surface
* if capping is off.
*
* @sa
* vtkRotationalExtrusionFilter
*/
#ifndef vtkLinearExtrusionFilter_h
#define vtkLinearExtrusionFilter_h
#include "vtkFiltersModelingModule.h" // For export macro
#include "vtkPolyDataAlgorithm.h"
VTK_ABI_NAMESPACE_BEGIN
class vtkDataArray;
#define VTK_VECTOR_EXTRUSION 1
#define VTK_NORMAL_EXTRUSION 2
#define VTK_POINT_EXTRUSION 3
class VTKFILTERSMODELING_EXPORT vtkLinearExtrusionFilter : public vtkPolyDataAlgorithm
{
public:
vtkTypeMacro(vtkLinearExtrusionFilter, vtkPolyDataAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent) override;
/**
* Create object with normal extrusion type, capping on, scale factor=1.0,
* vector (0,0,1), and extrusion point (0,0,0).
*/
static vtkLinearExtrusionFilter* New();
///@{
/**
* Set/Get the type of extrusion.
*/
vtkSetClampMacro(ExtrusionType, int, VTK_VECTOR_EXTRUSION, VTK_POINT_EXTRUSION);
vtkGetMacro(ExtrusionType, int);
void SetExtrusionTypeToVectorExtrusion() { this->SetExtrusionType(VTK_VECTOR_EXTRUSION); }
void SetExtrusionTypeToNormalExtrusion() { this->SetExtrusionType(VTK_NORMAL_EXTRUSION); }
void SetExtrusionTypeToPointExtrusion() { this->SetExtrusionType(VTK_POINT_EXTRUSION); }
///@}
///@{
/**
* Turn on/off the capping of the skirt.
*/
vtkSetMacro(Capping, vtkTypeBool);
vtkGetMacro(Capping, vtkTypeBool);
vtkBooleanMacro(Capping, vtkTypeBool);
///@}
///@{
/**
* Set/Get extrusion scale factor,
*/
vtkSetMacro(ScaleFactor, double);
vtkGetMacro(ScaleFactor, double);
///@}
///@{
/**
* Set/Get extrusion vector. Only needs to be set if VectorExtrusion is
* turned on.
*/
vtkSetVector3Macro(Vector, double);
vtkGetVectorMacro(Vector, double, 3);
///@}
///@{
/**
* Set/Get extrusion point. Only needs to be set if PointExtrusion is
* turned on. This is the point towards which extrusion occurs.
*/
vtkSetVector3Macro(ExtrusionPoint, double);
vtkGetVectorMacro(ExtrusionPoint, double, 3);
///@}
protected:
vtkLinearExtrusionFilter();
~vtkLinearExtrusionFilter() override = default;
int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
int ExtrusionType;
vtkTypeBool Capping;
double ScaleFactor;
double Vector[3];
double ExtrusionPoint[3];
void (vtkLinearExtrusionFilter::*ExtrudePoint)(double x[3], vtkIdType id, vtkDataArray* normals);
void ViaNormal(double x[3], vtkIdType id, vtkDataArray* normals);
void ViaVector(double x[3], vtkIdType id, vtkDataArray* normals = nullptr);
void ViaPoint(double x[3], vtkIdType id, vtkDataArray* normals = nullptr);
private:
vtkLinearExtrusionFilter(const vtkLinearExtrusionFilter&) = delete;
void operator=(const vtkLinearExtrusionFilter&) = delete;
};
VTK_ABI_NAMESPACE_END
#endif
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