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edge.h
1 //
2 // edge.h
3 //
4 // Copyright (C) 1996 Limit Point Systems, Inc.
5 //
6 // Author: Curtis Janssen <cljanss@limitpt.com>
7 // Maintainer: LPS
8 //
9 // This file is part of the SC Toolkit.
10 //
11 // The SC Toolkit is free software; you can redistribute it and/or modify
12 // it under the terms of the GNU Library General Public License as published by
13 // the Free Software Foundation; either version 2, or (at your option)
14 // any later version.
15 //
16 // The SC Toolkit is distributed in the hope that it will be useful,
17 // but WITHOUT ANY WARRANTY; without even the implied warranty of
18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 // GNU Library General Public License for more details.
20 //
21 // You should have received a copy of the GNU Library General Public License
22 // along with the SC Toolkit; see the file COPYING.LIB. If not, write to
23 // the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
24 //
25 // The U.S. Government is granted a limited license as per AL 91-7.
26 //
27
28 #ifndef _math_isosurf_edge_h
29 #define _math_isosurf_edge_h
30
31 #ifdef __GNUC__
32 #pragma interface
33 #endif
34
35 #include <set>
36
37 #include <math/isosurf/vertex.h>
38
39 namespace sc {
40
41 class Edge: public RefCount {
42 private:
43 int _order;
44 Ref<Vertex> *_vertices; // nvertices = _order + 1
45 public:
46 Edge(const Ref<Vertex> &p1,
47 const Ref<Vertex> &p2)
48 {
49 _order = 1;
50 _vertices = new Ref<Vertex>[2];
51 _vertices[0]=p1; _vertices[1]=p2;
52 }
53 Edge(const Ref<Vertex> &p1,
54 const Ref<Vertex> &p2,
55 const Ref<Vertex> &p3);
56 Edge(const Ref<Vertex> &p1,
57 const Ref<Vertex> &p2,
58 const Ref<Vertex> &p3,
59 const Ref<Vertex> &p4);
60 ~Edge();
61 int order() const { return _order; }
62 double straight_length();
63 // return the endpoints
64 Ref<Vertex> vertex(int i) const
65 {
66 return i?_vertices[_order]:_vertices[0];
67 }
68 // returns endpoints or interior vertex 0 <= i <= order
69 Ref<Vertex> interior_vertex(int i) const
70 {
71 return _vertices[i];
72 }
73 // add the endpoints to the set
74 void add_vertices(std::set<Ref<Vertex> >&);
75 void set_order(int order, const Ref<Volume>&vol,double isovalue);
76 // find the position of a point on the edge
77 int interpolate(double location, SCVector3&point, SCVector3&norm);
78 // find the true position of a point using the isosurface
79 int interpolate(double location, SCVector3&point, SCVector3&norm,
80 const Ref<Volume> &vol, double isovalue);
81 };
82
83 }
84
85 #endif
86
87 // Local Variables:
88 // mode: c++
89 // c-file-style: "CLJ"
90 // End: