1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/**
* $Id$
* ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version. The Blender
* Foundation also sells licenses for use in proprietary software under
* the Blender License. See http://www.blender.org/BL/ for information
* about this.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL/BL DUAL LICENSE BLOCK *****
*/
#ifndef BSP_CSGNCMeshSplitter_h
#define BSP_CSGNCMeshSplitter_h
class BSP_MeshFragment;
class MT_Plane3;
class BSP_CSGMesh;
#include "BSP_MeshPrimitives.h"
#include "../extern/CSG_BooleanOps.h"
#include "BSP_CSGISplitter.h"
/**
* This class contains splitting functions for a CSGMesh.
* The atomic operation of a bsp CSG algorithm is to split
* a mesh fragment (connected collection of polygons contained
* in a convex cell) by a plane. This class makes no attempt
* to maintain edge connectivity in the mesh. It just rips
* up the polygons. This is fine for tree building.
*/
class BSP_CSGNCMeshSplitter : public BSP_CSGISplitter
{
public :
/// construction
BSP_CSGNCMeshSplitter(
);
BSP_CSGNCMeshSplitter(
const BSP_CSGNCMeshSplitter & other
);
/**
* @section BSP specific mesh operations.
* Inherited from BSP_CSGISplitter
*/
/**
* Split a mesh fragment wrt plane. Generates 3 mesh fragments,
* in, out and on. Only splits polygons - not edges, does not maintain
* connectivity information. The contents of frag are consumed by this oepration.
*/
void
Split(
const MT_Plane3& plane,
BSP_MeshFragment *frag,
BSP_MeshFragment *in_frag,
BSP_MeshFragment *out_frag,
BSP_MeshFragment *on_frag,
BSP_MeshFragment *spanning_frag
);
/// Split the entire mesh with respect to the plane.
void
Split(
BSP_CSGMesh & mesh,
const MT_Plane3& plane,
BSP_MeshFragment *in_frag,
BSP_MeshFragment *out_frag,
BSP_MeshFragment *on_frag,
BSP_MeshFragment *spanning_frag
);
~BSP_CSGNCMeshSplitter(
);
private :
void
SplitImp(
BSP_CSGMesh & mesh,
const MT_Plane3& plane,
const std::vector<BSP_FaceInd> & spanning_faces,
BSP_MeshFragment *in_frag,
BSP_MeshFragment *out_frag,
BSP_MeshFragment *on_frag,
std::vector<BSP_VertexInd> & classified_verts
);
void
SplitPolygon(
const MT_Plane3 &plane,
BSP_CSGMesh & mesh,
BSP_FaceInd fi,
BSP_FaceInd &fin,
BSP_FaceInd &fout
);
/// Cached helpers
/// Split function responsibe for:
std::vector<BSP_FaceInd> m_spanning_faces;
std::vector<BSP_VertexInd> m_tagged_verts;
/// SplitPolygon responsible for:
std::vector<BSP_FaceInd> m_in_loop,m_out_loop,m_on_loop;
};
#endif
|