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octree_isocont.hh
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1 //------------------------------------------------------------------------------
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3 //
4 // Copyright (C) 2008-2011 by the OpenStructure authors
5 //
6 // This library is free software; you can redistribute it and/or modify it under
7 // the terms of the GNU Lesser General Public License as published by the Free
8 // Software Foundation; either version 3.0 of the License, or (at your option)
9 // any later version.
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12 // FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
13 // details.
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18 //------------------------------------------------------------------------------
19 #ifndef OST_GFX_IMPL_OCTREE_ISOCONT_HH
20 #define OST_GFX_IMPL_OCTREE_ISOCONT_HH
21 
22 /*
23  Author: Marco Biasini
24  */
25 #include <boost/unordered_map.hpp>
26 
27 #include <ost/img/image_handle.hh>
28 #include <ost/img/image_state.hh>
29 #include <ost/gfx/module_config.hh>
30 #include <ost/gfx/vertex_array.hh>
32 
33 namespace ost { namespace gfx { namespace impl {
34 
35 struct EdgeDesc {
36  EdgeDesc(uint8_t d, const img::Point& o,
37  uint8_t ac1, uint8_t ac2, bool l):
38  dir(d), off(o), c1(ac1), c2(ac2), lv(l)
39  { }
41  {
42  img::Point k=p+off;
43  return 4*ext.Point2Offset(k)+dir;
44  }
49  bool lv;
50 };
55 private:
56  static uint16_t EDGE_FLAGS[];
57  static img::Point POINT_OFFSETS[];
58  static int8_t TRIANGLES[256][16];
59  static EdgeDesc EDGE_DESC[12];
60 public:
61  typedef boost::unordered_map<uint32_t, VertexID> EdgeMap;
62  OctreeIsocont(IndexedVertexArray& va, float level, bool triangles,
63  const Color& color):
64  va_(va), level_(level), triangles_(triangles), color_(color)
65  { }
66  bool VisitNode(const impl::OctreeNode& node, uint8_t level,
67  const img::Extent& ext)
68  {
69  return (node.GetMin()<level_ && level_<=node.GetMax());
70  }
71  void VisitLeaf(img::RealSpatialImageState* map,
72  const img::Point& point);
73 
74  VertexID GetOrGenVert(img::RealSpatialImageState* map, const img::Point& p,
75  EdgeDesc* desc);
76 private:
77  IndexedVertexArray& va_;
78  float level_;
79  EdgeMap edge_map_;
80  bool triangles_;
81  Color color_;
82 };
83 
84 
85 }}}
86 
87 #endif
88