source: GTP/trunk/Lib/Vis/Preprocessing/src/Triangle3.h @ 1933

Revision 1933, 1.7 KB checked in by mattausch, 18 years ago (diff)

worked on gvs reverse sampling (still in debug state)

Line 
1#ifndef __TRIANGLE3_H
2#define __TRIANGLE3_H
3
4#include "Vector3.h"
5
6
7namespace GtpVisibilityPreprocessor {
8
9class AxisAlignedBox3;
10class Ray;
11class Plane3;
12
13struct Triangle3
14{
15        Triangle3() {};
16        Triangle3(const Vector3 &a, const Vector3 &b, const Vector3 &c);
17
18        void Init(const Vector3 &a, const Vector3 &b, const Vector3 &c);
19
20        Vector3 GetNormal() const;
21
22        Vector3 GetCenter() const;
23
24        float GetSpatialAngle(const Vector3 &point) const;
25
26        float GetArea() const;
27
28        /// returns bounding box around this triangle
29        AxisAlignedBox3 GetBoundingBox() const;
30
31        /// Casts ray into this triangle. Returns hit
32        int CastRay(const Ray &ray, float &t, const float nearestT, Vector3 &normal) const;
33
34        friend ostream& operator<< (ostream &s, const Triangle3 &A);
35        friend istream& operator>> (istream &s, Triangle3 &A);
36
37        /** Checks if this triangle is ill-defined.
38        */
39        bool CheckValidity() const;
40
41        /** Intersects triangle with plane, returns intersection points
42                if intersection is happening.
43
44                @returns true if triangle intersects plane
45        */
46        bool GetPlaneIntersection(const Plane3 &plane,
47                                                          Vector3 &intersectA,
48                                                          Vector3 &intersectB) const;
49
50        ///////////////////
51
52        /// the triangle vertices
53        Vector3 mVertices[3];
54};
55
56
57// Overload << operator for C++-style output
58inline ostream&
59operator<< (ostream &s, const Triangle3 &A)
60{
61  return s << "(" << A.mVertices[0] << ", " << A.mVertices[1] << ", " << A.mVertices[2] << ")";
62}
63
64// Overload >> operator for C++-style input
65inline istream&
66operator>> (istream &s, Triangle3 &A)
67{
68  char a;
69  // read "(x, y, z)"
70  return s >> a >> A.mVertices[0] >> a >> A.mVertices[1] >> a >> A.mVertices[2] >> a;
71}
72
73
74}
75
76#endif
77
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