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1// Copyright (C) 2002-2012 Nikolaus Gebhardt
2// This file is part of the "Irrlicht Engine".
3// For conditions of distribution and use, see copyright notice in irrlicht.h
4
5#include "IrrCompileConfig.h"
6
7#ifdef _IRR_COMPILE_WITH_STL_WRITER_
8
9#include "CSTLMeshWriter.h"
10#include "os.h"
11#include "IMesh.h"
12#include "IMeshBuffer.h"
13#include "IAttributes.h"
14#include "ISceneManager.h"
15#include "IMeshCache.h"
16#include "IWriteFile.h"
17
18namespace irr
19{
20namespace scene
21{
22
23CSTLMeshWriter::CSTLMeshWriter(scene::ISceneManager* smgr)
24 : SceneManager(smgr)
25{
26 #ifdef _DEBUG
27 setDebugName("CSTLMeshWriter");
28 #endif
29
30 if (SceneManager)
31 SceneManager->grab();
32}
33
34
35CSTLMeshWriter::~CSTLMeshWriter()
36{
37 if (SceneManager)
38 SceneManager->drop();
39}
40
41
42//! Returns the type of the mesh writer
43EMESH_WRITER_TYPE CSTLMeshWriter::getType() const
44{
45 return EMWT_STL;
46}
47
48
49//! writes a mesh
50bool CSTLMeshWriter::writeMesh(io::IWriteFile* file, scene::IMesh* mesh, s32 flags)
51{
52 if (!file)
53 return false;
54
55 os::Printer::log("Writing mesh", file->getFileName());
56
57 if (flags & scene::EMWF_WRITE_COMPRESSED)
58 return writeMeshBinary(file, mesh, flags);
59 else
60 return writeMeshASCII(file, mesh, flags);
61}
62
63
64bool CSTLMeshWriter::writeMeshBinary(io::IWriteFile* file, scene::IMesh* mesh, s32 flags)
65{
66 // write STL MESH header
67
68 file->write("binary ",7);
69 const core::stringc name(SceneManager->getMeshCache()->getMeshName(mesh));
70 const s32 sizeleft = 73-name.size(); // 80 byte header
71 if (sizeleft<0)
72 file->write(name.c_str(),73);
73 else
74 {
75 char* buf = new char[80];
76 memset(buf, 0, 80);
77 file->write(name.c_str(),name.size());
78 file->write(buf,sizeleft);
79 delete [] buf;
80 }
81 u32 facenum = 0;
82 for (u32 j=0; j<mesh->getMeshBufferCount(); ++j)
83 facenum += mesh->getMeshBuffer(j)->getIndexCount()/3;
84 file->write(&facenum,4);
85
86 // write mesh buffers
87
88 for (u32 i=0; i<mesh->getMeshBufferCount(); ++i)
89 {
90 IMeshBuffer* buffer = mesh->getMeshBuffer(i);
91 if (buffer)
92 {
93 const u32 indexCount = buffer->getIndexCount();
94 const u16 attributes = 0;
95 for (u32 j=0; j<indexCount; j+=3)
96 {
97 const core::vector3df& v1 = buffer->getPosition(buffer->getIndices()[j]);
98 const core::vector3df& v2 = buffer->getPosition(buffer->getIndices()[j+1]);
99 const core::vector3df& v3 = buffer->getPosition(buffer->getIndices()[j+2]);
100 const core::plane3df tmpplane(v1,v2,v3);
101 file->write(&tmpplane.Normal, 12);
102 file->write(&v1, 12);
103 file->write(&v2, 12);
104 file->write(&v3, 12);
105 file->write(&attributes, 2);
106 }
107 }
108 }
109 return true;
110}
111
112
113bool CSTLMeshWriter::writeMeshASCII(io::IWriteFile* file, scene::IMesh* mesh, s32 flags)
114{
115 // write STL MESH header
116
117 file->write("solid ",6);
118 const core::stringc name(SceneManager->getMeshCache()->getMeshName(mesh));
119 file->write(name.c_str(),name.size());
120 file->write("\n\n",2);
121
122 // write mesh buffers
123
124 for (u32 i=0; i<mesh->getMeshBufferCount(); ++i)
125 {
126 IMeshBuffer* buffer = mesh->getMeshBuffer(i);
127 if (buffer)
128 {
129 const u32 indexCount = buffer->getIndexCount();
130 for (u32 j=0; j<indexCount; j+=3)
131 {
132 writeFace(file,
133 buffer->getPosition(buffer->getIndices()[j]),
134 buffer->getPosition(buffer->getIndices()[j+1]),
135 buffer->getPosition(buffer->getIndices()[j+2]));
136 }
137 file->write("\n",1);
138 }
139 }
140
141 file->write("endsolid ",9);
142 file->write(name.c_str(),name.size());
143
144 return true;
145}
146
147
148void CSTLMeshWriter::getVectorAsStringLine(const core::vector3df& v, core::stringc& s) const
149{
150 s = core::stringc(v.X);
151 s += " ";
152 s += core::stringc(v.Y);
153 s += " ";
154 s += core::stringc(v.Z);
155 s += "\n";
156}
157
158
159void CSTLMeshWriter::writeFace(io::IWriteFile* file,
160 const core::vector3df& v1,
161 const core::vector3df& v2,
162 const core::vector3df& v3)
163{
164 core::stringc tmp;
165 file->write("facet normal ",13);
166 getVectorAsStringLine(core::plane3df(v1,v2,v3).Normal, tmp);
167 file->write(tmp.c_str(),tmp.size());
168 file->write(" outer loop\n",13);
169 file->write(" vertex ",11);
170 getVectorAsStringLine(v1, tmp);
171 file->write(tmp.c_str(),tmp.size());
172 file->write(" vertex ",11);
173 getVectorAsStringLine(v2, tmp);
174 file->write(tmp.c_str(),tmp.size());
175 file->write(" vertex ",11);
176 getVectorAsStringLine(v3, tmp);
177 file->write(tmp.c_str(),tmp.size());
178 file->write(" endloop\n",10);
179 file->write("endfacet\n",9);
180}
181
182
183} // end namespace
184} // end namespace
185
186#endif
187
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