Panda3D

nurbsCurveEvaluator.h

00001 // Filename: nurbsCurveEvaluator.h
00002 // Created by:  drose (03Dec02)
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 NURBSCURVEEVALUATOR_H
00016 #define NURBSCURVEEVALUATOR_H
00017 
00018 #include "pandabase.h"
00019 #include "nurbsBasisVector.h"
00020 #include "nurbsCurveResult.h"
00021 #include "nurbsVertex.h"
00022 #include "pointerTo.h"
00023 #include "vector_stdfloat.h"
00024 #include "pvector.h"
00025 #include "nodePath.h"
00026 #include "referenceCount.h"
00027 #include "luse.h"
00028 
00029 ////////////////////////////////////////////////////////////////////
00030 //       Class : NurbsCurveEvaluator
00031 // Description : This class is an abstraction for evaluating NURBS
00032 //               curves.  It accepts an array of vertices, each of
00033 //               which may be in a different coordinate space (as
00034 //               defined by a NodePath), as well as an optional knot
00035 //               vector.
00036 //
00037 //               This is not related to NurbsCurve, CubicCurveseg or
00038 //               any of the ParametricCurve-derived objects in this
00039 //               module.  It is a completely parallel implementation
00040 //               of NURBS curves, and will probably eventually replace
00041 //               the whole ParametricCurve class hierarchy.
00042 ////////////////////////////////////////////////////////////////////
00043 class EXPCL_PANDA_PARAMETRICS NurbsCurveEvaluator : public ReferenceCount {
00044 PUBLISHED:
00045   NurbsCurveEvaluator();
00046   ~NurbsCurveEvaluator();
00047 
00048   INLINE void set_order(int order);
00049   INLINE int get_order() const;
00050 
00051   void reset(int num_vertices);
00052 
00053   INLINE int get_num_vertices() const;
00054   INLINE void set_vertex(int i, const LVecBase4 &vertex);
00055   INLINE void set_vertex(int i, const LVecBase3 &vertex, PN_stdfloat weight = 1.0);
00056   INLINE const LVecBase4 &get_vertex(int i) const;
00057   INLINE LVecBase4 get_vertex(int i, const NodePath &rel_to) const;
00058   MAKE_SEQ(get_vertices, get_num_vertices, get_vertex);
00059 
00060   INLINE void set_vertex_space(int i, const NodePath &space);
00061   INLINE void set_vertex_space(int i, const string &space);
00062   NodePath get_vertex_space(int i, const NodePath &rel_to) const;
00063 
00064   INLINE void set_extended_vertex(int i, int d, PN_stdfloat value);
00065   INLINE PN_stdfloat get_extended_vertex(int i, int d) const;
00066   void set_extended_vertices(int i, int d,
00067                              const PN_stdfloat values[], int num_values);
00068 
00069   INLINE int get_num_knots() const;
00070   void set_knot(int i, PN_stdfloat knot);
00071   PN_stdfloat get_knot(int i) const;
00072   MAKE_SEQ(get_knots, get_num_knots, get_knot);
00073   void normalize_knots();
00074 
00075   INLINE int get_num_segments() const;
00076 
00077   PT(NurbsCurveResult) evaluate(const NodePath &rel_to = NodePath()) const;
00078   PT(NurbsCurveResult) evaluate(const NodePath &rel_to,
00079                                 const LMatrix4 &mat) const;
00080 
00081   void output(ostream &out) const;
00082 
00083 public:
00084   typedef epvector<LVecBase4> Vert4Array;
00085   typedef pvector<LPoint3> Vert3Array;
00086   void get_vertices(Vert4Array &verts, const NodePath &rel_to) const;
00087   void get_vertices(Vert3Array &verts, const NodePath &rel_to) const;
00088 
00089 private:
00090   void recompute_knots();
00091   void recompute_basis();
00092 
00093   int _order;
00094 
00095   typedef epvector<NurbsVertex> Vertices;
00096   Vertices _vertices;
00097 
00098   bool _knots_dirty;
00099   typedef vector_stdfloat Knots;
00100   Knots _knots;
00101 
00102   bool _basis_dirty;
00103   NurbsBasisVector _basis;
00104 };
00105 
00106 INLINE ostream &operator << (ostream &out, const NurbsCurveEvaluator &n);
00107 
00108 #include "nurbsCurveEvaluator.I"
00109 
00110 #endif
00111 
 All Classes Functions Variables Enumerations