VTK  9.3.0
vtkPlanesIntersection.h
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1// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
2// SPDX-FileCopyrightText: Copyright (c) Sandia Corporation
3// SPDX-License-Identifier: BSD-3-Clause
4
30#ifndef vtkPlanesIntersection_h
31#define vtkPlanesIntersection_h
32
33#include "vtkCommonDataModelModule.h" // For export macro
34#include "vtkPlanes.h"
35
36VTK_ABI_NAMESPACE_BEGIN
37class vtkPoints;
39class vtkCell;
40
41class VTKCOMMONDATAMODEL_EXPORT vtkPlanesIntersection : public vtkPlanes
42{
44
45public:
46 void PrintSelf(ostream& os, vtkIndent indent) override;
47
49
57 void SetRegionVertices(double* v, int nvertices);
59 // Retained for backward compatibility
60 int GetNumRegionVertices() { return this->GetNumberOfRegionVertices(); }
61 int GetRegionVertices(double* v, int nvertices);
62
69
78 static int PolygonIntersectsBBox(double bounds[6], vtkPoints* pts);
79
88
89protected:
90 static void ComputeNormal(double* p1, double* p2, double* p3, double normal[3]);
91 static double EvaluatePlaneEquation(double* x, double* p);
92 static void PlaneEquation(double* n, double* x, double* p);
93 static int GoodNormal(double* n);
94 static int Invert3x3(double M[3][3]);
95
98
99private:
100 int IntersectsBoundingBox(vtkPoints* R);
101 int EnclosesBoundingBox(vtkPoints* R);
102 int EvaluateFacePlane(int plane, vtkPoints* R);
103 int IntersectsProjection(vtkPoints* R, int direction);
104
105 void SetPlaneEquations();
106 void ComputeRegionVertices();
107
108 void planesMatrix(int p1, int p2, int p3, double M[3][3]) const;
109 int duplicate(double testv[3]) const;
110 void planesRHS(int p1, int p2, int p3, double r[3]) const;
111 int outsideRegion(double v[3]);
112
113 // plane equations
114 double* Planes;
115
116 // vertices of convex regions enclosed by the planes, also
117 // the ccw hull of that region projected in 3 orthog. directions
118 vtkPointsProjectedHull* RegionPts;
119
121 void operator=(const vtkPlanesIntersection&) = delete;
122};
123VTK_ABI_NAMESPACE_END
124#endif
abstract class to specify cell behavior
Definition vtkCell.h:50
a simple class to control print indentation
Definition vtkIndent.h:29
A vtkPlanesIntersection object is a vtkPlanes object that can compute whether the arbitrary convex re...
static int PolygonIntersectsBBox(double bounds[6], vtkPoints *pts)
A convenience function provided by this class, returns 1 if the polygon defined in pts intersects the...
int GetRegionVertices(double *v, int nvertices)
void SetRegionVertices(double *v, int nvertices)
static void ComputeNormal(double *p1, double *p2, double *p3, double normal[3])
static int GoodNormal(double *n)
static int Invert3x3(double M[3][3])
static double EvaluatePlaneEquation(double *x, double *p)
~vtkPlanesIntersection() override
static vtkPlanesIntersection * Convert3DCell(vtkCell *cell)
Another convenience function provided by this class, returns the vtkPlanesIntersection object represe...
void PrintSelf(ostream &os, vtkIndent indent) override
Standard methods for instantiation, type information, and printing.
void SetRegionVertices(vtkPoints *pts)
It helps if you know the vertices of the convex region.
static vtkPlanesIntersection * New()
static void PlaneEquation(double *n, double *x, double *p)
int IntersectsRegion(vtkPoints *R)
Return 1 if the axis aligned box defined by R intersects the region defined by the planes,...
implicit function for convex set of planes
Definition vtkPlanes.h:42
the convex hull of the orthogonal projection of the vtkPoints in the 3 coordinate directions
represent and manipulate 3D points
Definition vtkPoints.h:29