Panda3D
nurbsSurfaceResult.h
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1 /**
2  * PANDA 3D SOFTWARE
3  * Copyright (c) Carnegie Mellon University. All rights reserved.
4  *
5  * All use of this software is subject to the terms of the revised BSD
6  * license. You should have received a copy of this license along
7  * with this source code in a file named "LICENSE."
8  *
9  * @file nurbsSurfaceResult.h
10  * @author drose
11  * @date 2003-10-10
12  */
13 
14 #ifndef NURBSSURFACERESULT_H
15 #define NURBSSURFACERESULT_H
16 
17 #include "pandabase.h"
18 #include "referenceCount.h"
19 #include "nurbsBasisVector.h"
20 #include "epvector.h"
21 
22 class NurbsVertex;
23 
24 /**
25  * The result of a NurbsSurfaceEvaluator. This object represents a surface in
26  * a particular coordinate space. It can return the point and/or normal to
27  * the surface at any point.
28  */
29 class EXPCL_PANDA_PARAMETRICS NurbsSurfaceResult : public ReferenceCount {
30 public:
31  NurbsSurfaceResult(const NurbsBasisVector &u_basis,
32  const NurbsBasisVector &v_basis,
33  const LVecBase4 vecs[], const NurbsVertex *verts,
34  int num_u_vertices, int num_v_vertices);
35 
36 PUBLISHED:
37  INLINE ~NurbsSurfaceResult();
38 
39  INLINE PN_stdfloat get_start_u() const;
40  INLINE PN_stdfloat get_end_u() const;
41 
42  INLINE PN_stdfloat get_start_v() const;
43  INLINE PN_stdfloat get_end_v() const;
44 
45  INLINE bool eval_point(PN_stdfloat u, PN_stdfloat v, LVecBase3 &point);
46  INLINE bool eval_normal(PN_stdfloat u, PN_stdfloat v, LVecBase3 &normal);
47  INLINE PN_stdfloat eval_extended_point(PN_stdfloat u, PN_stdfloat v, int d);
48  INLINE bool eval_extended_points(PN_stdfloat u, PN_stdfloat v, int d,
49  PN_stdfloat result[], int num_values);
50 
51  INLINE int get_num_u_segments() const;
52  INLINE int get_num_v_segments() const;
53  void eval_segment_point(int ui, int vi, PN_stdfloat u, PN_stdfloat v, LVecBase3 &point) const;
54  void eval_segment_normal(int ui, int vi, PN_stdfloat u, PN_stdfloat v, LVecBase3 &normal) const;
55  PN_stdfloat eval_segment_extended_point(int ui, int vi, PN_stdfloat u, PN_stdfloat v, int d) const;
56  void eval_segment_extended_points(int ui, int vi, PN_stdfloat u, PN_stdfloat v, int d,
57  PN_stdfloat result[], int num_values) const;
58  INLINE PN_stdfloat get_segment_u(int ui, PN_stdfloat u) const;
59  INLINE PN_stdfloat get_segment_v(int vi, PN_stdfloat v) const;
60 
61 private:
62  INLINE int verti(int ui, int vi) const;
63  INLINE int segi(int ui, int vi) const;
64 
65  int find_u_segment(PN_stdfloat u);
66  int r_find_u_segment(PN_stdfloat u, int top, int bot) const;
67  int find_v_segment(PN_stdfloat v);
68  int r_find_v_segment(PN_stdfloat v, int top, int bot) const;
69 
70  NurbsBasisVector _u_basis;
71  NurbsBasisVector _v_basis;
72  const NurbsVertex *_verts;
73  int _num_u_vertices;
74  int _num_v_vertices;
75 
76  // We pre-compose the basis matrix and the geometry vectors, so we have
77  // these handy for evaluation. There is one entry in the _composed for each
78  // entry in u_basis._segments * v_basis._segments.
79  class ComposedMats {
80  public:
81  LMatrix4 _x, _y, _z, _w;
82  };
83  typedef epvector<ComposedMats> ComposedGeom;
84  ComposedGeom _composed;
85 
86 
87  int _last_u_segment;
88  PN_stdfloat _last_u_from;
89  PN_stdfloat _last_u_to;
90  int _last_v_segment;
91  PN_stdfloat _last_v_from;
92  PN_stdfloat _last_v_to;
93 };
94 
95 #include "nurbsSurfaceResult.I"
96 
97 #endif
pandabase.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
ReferenceCount
A base class for all things that want to be reference-counted.
Definition: referenceCount.h:38
NurbsVertex
This represents a single control vertex in a NurbsEvaluator.
Definition: nurbsVertex.h:32
nurbsSurfaceResult.I
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
nurbsBasisVector.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
NurbsBasisVector
This encapsulates a series of matrices that are used to represent the sequential segments of a NurbsC...
Definition: nurbsBasisVector.h:33
referenceCount.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
epvector.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
NurbsSurfaceResult
The result of a NurbsSurfaceEvaluator.
Definition: nurbsSurfaceResult.h:29