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lineSeg2d.h
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2 // Copyright 2016 Pixar
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24 #ifndef GF_LINESEG2D_H
25 #define GF_LINESEG2D_H
26 
29 
30 #include "pxr/pxr.h"
31 #include "pxr/base/gf/line2d.h"
32 #include "pxr/base/gf/vec2d.h"
33 #include "pxr/base/gf/api.h"
34 
35 #include <float.h>
36 
37 PXR_NAMESPACE_OPEN_SCOPE
38 
46 class GfLineSeg2d {
47 
48  public:
49 
52  }
53 
55  GfLineSeg2d(const GfVec2d &p0, const GfVec2d &p1 ) {
56  _length = _line.Set( p0, p1 - p0 );
57  }
58 
61  GfVec2d GetPoint( double t ) const {return _line.GetPoint( t * _length );}
62 
64  const GfVec2d &GetDirection() const { return _line.GetDirection(); }
65 
67  double GetLength() const { return _length; }
68 
72  GF_API
73  GfVec2d FindClosestPoint(const GfVec2d &point, double *t = NULL) const;
74 
77  bool operator ==(const GfLineSeg2d &l) const {
78  return (_line == l._line && _length == l._length);
79  }
80 
84  bool operator !=(const GfLineSeg2d &r) const {
85  return ! (*this == r);
86  }
87 
88  private:
89  GF_API
90  friend bool GfFindClosestPoints( const GfLine2d &, const GfLineSeg2d &,
91  GfVec2d *, GfVec2d *,
92  double *t1, double *t2 );
93  GF_API
94  friend bool GfFindClosestPoints( const GfLineSeg2d &, const GfLineSeg2d &,
95  GfVec2d *, GfVec2d *,
96  double *, double * );
97 
98  GfLine2d _line;
99  double _length; // distance from p0 to p1
100 };
101 
111 GF_API
112 bool GfFindClosestPoints( const GfLine2d &line, const GfLineSeg2d &seg,
113  GfVec2d *p1 = nullptr, GfVec2d *p2 = nullptr,
114  double *t1 = nullptr, double *t2 = nullptr );
115 
124 GF_API
125 bool GfFindClosestPoints( const GfLineSeg2d &seg1, const GfLineSeg2d &seg2,
126  GfVec2d *p1 = nullptr, GfVec2d *p2 = nullptr,
127  double *t1 = nullptr, double *t2 = nullptr );
128 
129 PXR_NAMESPACE_CLOSE_SCOPE
130 
131 #endif // GF_LINESEG2D_H
bool operator==(const GfLineSeg2d &l) const
Component-wise equality test.
Definition: lineSeg2d.h:77
GfVec2d GetPoint(double t) const
Return the point on the segment specified by the parameter t.
Definition: lineSeg2d.h:61
const GfVec2d & GetDirection() const
Return the normalized direction of the line.
Definition: line2d.h:73
GfLineSeg2d(const GfVec2d &p0, const GfVec2d &p1)
Construct a line segment that spans two points.
Definition: lineSeg2d.h:55
GF_API GfVec2d FindClosestPoint(const GfVec2d &point, double *t=NULL) const
Returns the point on the line that is closest to point.
Basic type: 2D line.
Definition: line2d.h:49
GF_API bool GfFindClosestPoints(const GfLine &l1, const GfLine &l2, GfVec3d *p1=nullptr, GfVec3d *p2=nullptr, double *t1=nullptr, double *t2=nullptr)
Computes the closets points between two lines.
const GfVec2d & GetDirection() const
Return the normalized direction of the line.
Definition: lineSeg2d.h:64
Basic type for a vector of 2 double components.
Definition: vec2d.h:63
double GetLength() const
Return the length of the line.
Definition: lineSeg2d.h:67
GfVec2d GetPoint(double t) const
Return the point on the line at ( p0 + t * dir ).
Definition: line2d.h:70
GF_API friend bool GfFindClosestPoints(const GfLine2d &, const GfLineSeg2d &, GfVec2d *, GfVec2d *, double *t1, double *t2)
Computes the closets points on line and seg.
GfLineSeg2d()
The default constructor leaves line parameters undefined.
Definition: lineSeg2d.h:51
bool operator!=(const GfLineSeg2d &r) const
Component-wise inequality test.
Definition: lineSeg2d.h:84
Basic type: 2D line segment.
Definition: lineSeg2d.h:46