1 | /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2004 Robert Osfield |
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2 | * |
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3 | * This library is open source and may be redistributed and/or modified under |
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4 | * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or |
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5 | * (at your option) any later version. The full license is in LICENSE file |
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6 | * included with this distribution, and on the openscenegraph.org website. |
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7 | * |
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8 | * This library is distributed in the hope that it will be useful, |
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9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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11 | * OpenSceneGraph Public License for more details. |
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12 | */ |
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13 | |
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14 | #ifndef OSG_LINESEGMENT |
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15 | #define OSG_LINESEGMENT 1 |
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16 | |
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17 | #include <osg/Matrix> |
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18 | #include <osg/BoundingBox> |
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19 | #include <osg/BoundingSphere> |
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20 | |
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21 | namespace osg { |
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22 | |
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23 | /** LineSegment class for representing a line segment. */ |
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24 | class OSG_EXPORT LineSegment : public Referenced |
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25 | { |
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26 | public: |
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27 | |
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28 | typedef Vec3d vec_type; |
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29 | typedef vec_type::value_type value_type; |
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30 | |
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31 | LineSegment() {}; |
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32 | LineSegment(const LineSegment& seg) : Referenced(),_s(seg._s),_e(seg._e) {} |
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33 | LineSegment(const vec_type& s,const vec_type& e) : _s(s),_e(e) {} |
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34 | |
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35 | LineSegment& operator = (const LineSegment& seg) { _s = seg._s; _e = seg._e; return *this; } |
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36 | |
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37 | inline void set(const vec_type& s,const vec_type& e) { _s=s; _e=e; } |
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38 | |
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39 | inline vec_type& start() { return _s; } |
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40 | inline const vec_type& start() const { return _s; } |
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41 | |
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42 | inline vec_type& end() { return _e; } |
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43 | inline const vec_type& end() const { return _e; } |
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44 | |
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45 | inline bool valid() const { return _s.valid() && _e.valid() && _s!=_e; } |
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46 | |
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47 | /** return true if segment intersects BoundingBox. */ |
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48 | bool intersect(const BoundingBox& bb) const; |
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49 | |
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50 | /** return true if segment intersects BoundingBox |
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51 | * and return the intersection ratios. |
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52 | */ |
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53 | bool intersect(const BoundingBox& bb,float& r1,float& r2) const; |
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54 | |
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55 | /** return true if segment intersects BoundingBox |
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56 | * and return the intersection ratios. |
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57 | */ |
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58 | bool intersect(const BoundingBox& bb,double& r1,double& r2) const; |
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59 | |
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60 | /** return true if segment intersects BoundingSphere. */ |
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61 | bool intersect(const BoundingSphere& bs) const; |
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62 | |
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63 | /** return true if segment intersects BoundingSphere and return the |
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64 | * intersection ratio. |
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65 | */ |
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66 | bool intersect(const BoundingSphere& bs,float& r1,float& r2) const; |
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67 | |
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68 | /** return true if segment intersects BoundingSphere and return the |
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69 | * intersection ratio. |
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70 | */ |
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71 | bool intersect(const BoundingSphere& bs,double& r1,double& r2) const; |
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72 | |
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73 | /** return true if segment intersects triangle |
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74 | * and set ratio long segment. |
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75 | */ |
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76 | bool intersect(const Vec3f& v1,const Vec3f& v2,const Vec3f& v3,float& r); |
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77 | |
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78 | /** return true if segment intersects triangle |
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79 | * and set ratio long segment. |
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80 | */ |
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81 | bool intersect(const Vec3d& v1,const Vec3d& v2,const Vec3d& v3,double& r); |
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82 | |
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83 | |
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84 | /** post multiply a segment by matrix.*/ |
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85 | inline void mult(const LineSegment& seg,const Matrix& m) { _s = seg._s*m; _e = seg._e*m; } |
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86 | /** pre multiply a segment by matrix.*/ |
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87 | inline void mult(const Matrix& m,const LineSegment& seg) { _s = m*seg._s; _e = m*seg._e; } |
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88 | |
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89 | protected: |
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90 | |
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91 | virtual ~LineSegment(); |
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92 | |
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93 | static bool intersectAndClip(vec_type& s,vec_type& e,const BoundingBox& bb); |
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94 | |
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95 | vec_type _s; |
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96 | vec_type _e; |
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97 | }; |
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98 | |
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99 | } |
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100 | |
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101 | #endif |
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