Panda3D
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collisionSegment.h
00001 // Filename: collisionSegment.h
00002 // Created by:  drose (30Jan01)
00003 //
00004 ////////////////////////////////////////////////////////////////////
00005 //
00006 // PANDA 3D SOFTWARE
00007 // Copyright (c) Carnegie Mellon University.  All rights reserved.
00008 //
00009 // All use of this software is subject to the terms of the revised BSD
00010 // license.  You should have received a copy of this license along
00011 // with this source code in a file named "LICENSE."
00012 //
00013 ////////////////////////////////////////////////////////////////////
00014 
00015 #ifndef COLLISIONSEGMENT_H
00016 #define COLLISIONSEGMENT_H
00017 
00018 #include "pandabase.h"
00019 
00020 #include "collisionSolid.h"
00021 
00022 class LensNode;
00023 
00024 ////////////////////////////////////////////////////////////////////
00025 //       Class : CollisionSegment
00026 // Description : A finite line segment, with two specific endpoints
00027 //               but no thickness.  It's similar to a CollisionRay,
00028 //               except it does not continue to infinity.
00029 //
00030 //               It does have an ordering, from point A to point B.
00031 //               If more than a single point of the segment is
00032 //               intersecting a solid, the reported intersection point
00033 //               is generally the closest on the segment to point A.
00034 ////////////////////////////////////////////////////////////////////
00035 class EXPCL_PANDA_COLLIDE CollisionSegment : public CollisionSolid {
00036 PUBLISHED:
00037   INLINE CollisionSegment();
00038   INLINE CollisionSegment(const LPoint3 &a, const LPoint3 &db);
00039   INLINE CollisionSegment(PN_stdfloat ax, PN_stdfloat ay, PN_stdfloat az,
00040                           PN_stdfloat bx, PN_stdfloat by, PN_stdfloat bz);
00041 
00042   virtual LPoint3 get_collision_origin() const;
00043 
00044 public:
00045   INLINE CollisionSegment(const CollisionSegment &copy);
00046   virtual CollisionSolid *make_copy();
00047 
00048   virtual PT(CollisionEntry)
00049   test_intersection(const CollisionEntry &entry) const;
00050 
00051   virtual void xform(const LMatrix4 &mat);
00052 
00053   virtual void output(ostream &out) const;
00054 
00055 PUBLISHED:
00056   INLINE void set_point_a(const LPoint3 &a);
00057   INLINE void set_point_a(PN_stdfloat x, PN_stdfloat y, PN_stdfloat z);
00058   INLINE const LPoint3 &get_point_a() const;
00059 
00060   INLINE void set_point_b(const LPoint3 &b);
00061   INLINE void set_point_b(PN_stdfloat x, PN_stdfloat y, PN_stdfloat z);
00062   INLINE const LPoint3 &get_point_b() const;
00063 
00064   bool set_from_lens(LensNode *camera, const LPoint2 &point);
00065   INLINE bool set_from_lens(LensNode *camera, PN_stdfloat px, PN_stdfloat py);
00066 
00067 protected:
00068   virtual PT(BoundingVolume) compute_internal_bounds() const;
00069 
00070 protected:
00071   virtual void fill_viz_geom();
00072 
00073 private:
00074   LPoint3 _a, _b;
00075 
00076 public:
00077   static void register_with_read_factory();
00078   virtual void write_datagram(BamWriter *manager, Datagram &dg);
00079 
00080 protected:
00081   static TypedWritable *make_from_bam(const FactoryParams &params);
00082   void fillin(DatagramIterator &scan, BamReader *manager);
00083 
00084 public:
00085   static TypeHandle get_class_type() {
00086     return _type_handle;
00087   }
00088   static void init_type() {
00089     CollisionSolid::init_type();
00090     register_type(_type_handle, "CollisionSegment",
00091                   CollisionSolid::get_class_type());
00092   }
00093   virtual TypeHandle get_type() const {
00094     return get_class_type();
00095   }
00096   virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
00097 
00098 private:
00099   static TypeHandle _type_handle;
00100 };
00101 
00102 #include "collisionSegment.I"
00103 
00104 #endif
00105 
00106 
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