# edge.h

    00001 //
    00002 // edge.h
    00003 //
    00004 // Copyright (C) 1996 Limit Point Systems, Inc.
    00005 //
    00006 // Author: Curtis Janssen <cljanss@limitpt.com>
    00007 // Maintainer: LPS
    00008 //
    00009 // This file is part of the SC Toolkit.
    00010 //
    00011 // The SC Toolkit is free software; you can redistribute it and/or modify
    00012 // it under the terms of the GNU Library General Public License as published by
    00013 // the Free Software Foundation; either version 2, or (at your option)
    00014 // any later version.
    00015 //
    00016 // The SC Toolkit is distributed in the hope that it will be useful,
    00017 // but WITHOUT ANY WARRANTY; without even the implied warranty of
    00018 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00019 // GNU Library General Public License for more details.
    00020 //
    00021 // You should have received a copy of the GNU Library General Public License
    00022 // along with the SC Toolkit; see the file COPYING.LIB.  If not, write to
    00023 // the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
    00024 //
    00025 // The U.S. Government is granted a limited license as per AL 91-7.
    00026 //
    00027
    00028 #ifndef _math_isosurf_edge_h
    00029 #define _math_isosurf_edge_h
    00030
    00031 #ifdef __GNUC__
    00032 #pragma interface
    00033 #endif
    00034
    00035 #include <set>
    00036
    00037 #include <math/isosurf/vertex.h>
    00038
    00039 namespace sc {
    00040
    00041 class Edge: public RefCount {
    00042   private:
    00043     int _order;
    00044     Ref<Vertex> *_vertices; // nvertices = _order + 1
    00045   public:
    00046     Edge(const Ref<Vertex> &p1,
    00047          const Ref<Vertex> &p2)
    00048     {
    00049       _order = 1;
    00050       _vertices = new Ref<Vertex>[2];
    00051       _vertices[0]=p1; _vertices[1]=p2;
    00052     }
    00053     Edge(const Ref<Vertex> &p1,
    00054          const Ref<Vertex> &p2,
    00055          const Ref<Vertex> &p3);
    00056     Edge(const Ref<Vertex> &p1,
    00057          const Ref<Vertex> &p2,
    00058          const Ref<Vertex> &p3,
    00059          const Ref<Vertex> &p4);
    00060     ~Edge();
    00061     int order() const { return _order; }
    00062     double straight_length();
    00063     // return the endpoints
    00064     Ref<Vertex> vertex(int i) const
    00065     {
    00066       return i?_vertices[_order]:_vertices[0];
    00067     }
    00068     // returns endpoints or interior vertex 0 <= i <= order
    00069     Ref<Vertex> interior_vertex(int i) const
    00070     {
    00071       return _vertices[i];
    00072     }
    00073     // add the endpoints to the set
    00074     void add_vertices(std::set<Ref<Vertex> >&);
    00075     void set_order(int order, const Ref<Volume>&vol,double isovalue);
    00076     // find the position of a point on the edge
    00077     int interpolate(double location, SCVector3&point, SCVector3&norm);
    00078     // find the true position of a point using the isosurface
    00079     int interpolate(double location, SCVector3&point, SCVector3&norm,
    00080                      const Ref<Volume> &vol, double isovalue);
    00081 };
    00082
    00083 }
    00084
    00085 #endif
    00086
    00087 // Local Variables:
    00088 // mode: c++
    00089 // c-file-style: "CLJ"
    00090 // End: