contrib/brushexport/export.cpp

   1 #include "export.h"
   2 #include "debugging/debugging.h"
   3 #include "ibrush.h"
   4 #include "iscenegraph.h"
   5 #include "iselection.h"
   6 #include "stream/stringstream.h"
   7 #include "stream/textfilestream.h"
   8
   9 #include <map>
  10
  11 // this is very evil, but right now there is no better way
  12 #include "../../radiant/brush.h"
  13
  14 // for limNames
  15 #define MAX_MATERIAL_NAME 20
  16
  17 /*
  18         Abstract baseclass for modelexporters
  19         the class collects all the data which then gets
  20         exported through the WriteToFile method.
  21 */
  22 class ExportData
  23 {
  24 public:
  25         ExportData(const std::set<std::string>& ignorelist, collapsemode mode, bool limNames, bool objs);
  26         virtual ~ExportData(void);
  27
  28         virtual void BeginBrush(Brush& b);
  29         virtual void AddBrushFace(Face& f);
  30         virtual void EndBrush(void);
  31
  32         virtual bool WriteToFile(const std::string& path, collapsemode mode) const = 0;
  33
  34 protected:
  35
  36         // a group of faces
  37         class group
  38         {
  39         public:
  40                 std::string name;
  41                 std::list<const Face*> faces;
  42         };
  43
  44         std::list<group> groups;
  45
  46 private:
  47
  48         // "textures/common/caulk" -> "caulk"
  49         void GetShaderNameFromShaderPath(const char* path, std::string& name);
  50
  51         group* current;
  52         collapsemode mode;
  53         const std::set<std::string>& ignorelist;
  54 };
  55
  56 ExportData::ExportData(const std::set<std::string>& _ignorelist, collapsemode _mode, bool _limNames, bool _objs)
  57         :       mode(_mode),
  58                 ignorelist(_ignorelist)
  59 {
  60         current = 0;
  61
  62         // in this mode, we need just one group
  63         if(mode == COLLAPSE_ALL)
  64         {
  65                 groups.push_back(group());
  66                 current = &groups.back();
  67                 current->name = "all";
  68         }
  69 }
  70
  71 ExportData::~ExportData(void)
  72 {
  73
  74 }
  75
  76 void ExportData::BeginBrush(Brush& b)
  77 {
  78         // create a new group for each brush
  79         if(mode == COLLAPSE_NONE)
  80         {
  81                 groups.push_back(group());
  82                 current = &groups.back();
  83
  84                 StringOutputStream str(256);
  85                 str << "Brush" << (const unsigned int)groups.size();
  86                 current->name = str.c_str();
  87         }
  88 }
  89
  90 void ExportData::EndBrush(void)
  91 {
  92         // all faces of this brush were on the ignorelist, discard the emptygroup
  93         if(mode == COLLAPSE_NONE)
  94         {
  95                 ASSERT_NOTNULL(current);
  96                 if(current->faces.empty())
  97                 {
  98                         groups.pop_back();
  99                         current = 0;
 100                 }
 101         }
 102 }
 103
 104 void ExportData::AddBrushFace(Face& f)
 105 {
 106         std::string shadername;
 107         GetShaderNameFromShaderPath(f.GetShader(), shadername);
 108
 109         // ignore faces from ignore list
 110         if(ignorelist.find(shadername) != ignorelist.end())
 111                 return;
 112
 113         if(mode == COLLAPSE_BY_MATERIAL)
 114         {
 115                 // find a group for this material
 116                 current = 0;
 117                 const std::list<group>::iterator end(groups.end());
 118                 for(std::list<group>::iterator it(groups.begin()); it != end; ++it)
 119                 {
 120                         if(it->name == shadername)
 121                                 current = &(*it);
 122                 }
 123
 124                 // no group found, create one
 125                 if(!current)
 126                 {
 127                         groups.push_back(group());
 128                         current = &groups.back();
 129                         current->name = shadername;
 130                 }
 131         }
 132
 133         ASSERT_NOTNULL(current);
 134
 135         // add face to current group
 136         current->faces.push_back(&f);
 137
 138 #ifdef _DEBUG
 139         globalOutputStream() << "Added Face to group " << current->name.c_str() << "\n";
 140 #endif
 141 }
 142
 143 void ExportData::GetShaderNameFromShaderPath(const char* path, std::string& name)
 144 {
 145         std::string tmp(path);
 146
 147         size_t last_slash = tmp.find_last_of("/");
 148
 149         if(last_slash != std::string::npos && last_slash == (tmp.length() - 1))
 150                 name = path;
 151         else
 152                 name = tmp.substr(last_slash + 1, tmp.length() - last_slash);
 153
 154 #ifdef _DEBUG
 155         globalOutputStream() << "Last: " << (const unsigned int) last_slash << " " << "length: " << (const unsigned int)tmp.length() << "Name: " << name.c_str() << "\n";
 156 #endif
 157 }
 158
 159 /*
 160         Exporter writing facedata as wavefront object
 161 */
 162 class ExportDataAsWavefront : public ExportData
 163 {
 164 private:
 165         bool expmat;
 166         bool limNames;
 167         bool objs;
 168
 169 public:
 170         ExportDataAsWavefront(const std::set<std::string>& _ignorelist, collapsemode _mode, bool _expmat, bool _limNames, bool _objs)
 171                 : ExportData(_ignorelist, _mode, _limNames, _objs)
 172         {
 173                 expmat = _expmat;
 174                 limNames = _limNames;
 175                 objs = _objs;
 176         }
 177
 178         bool WriteToFile(const std::string& path, collapsemode mode) const;
 179 };
 180
 181 bool ExportDataAsWavefront::WriteToFile(const std::string& path, collapsemode mode) const
 182 {
 183         std::string objFile = path.substr(0, path.length() -4) + ".obj";
 184         std::string mtlFile = path.substr(0, path.length() -4) + ".mtl";
 185
 186         std::set<std::string> materials;
 187
 188         TextFileOutputStream out(objFile.c_str());
 189
 190         if(out.failed())
 191         {
 192                 globalErrorStream() << "Unable to open file\n";
 193                 return false;
 194         }
 195
 196         out << "# Wavefront Objectfile exported with radiants brushexport plugin 3.0 by Thomas 'namespace' Nitschke, spam@codecreator.net\n\n";
 197
 198         if(expmat)
 199         {
 200                 size_t last = mtlFile.find_last_of("//");
 201                 std::string mtllib = mtlFile.substr(last + 1, mtlFile.size() - last).c_str();
 202                 out << "mtllib " << mtllib.c_str() << "\n";
 203         }
 204
 205         unsigned int vertex_count = 0;
 206
 207         const std::list<ExportData::group>::const_iterator gend(groups.end());
 208         for(std::list<ExportData::group>::const_iterator git(groups.begin()); git != gend; ++git)
 209         {
 210                 typedef std::multimap<std::string, std::string> bm;
 211                 bm brushMaterials;
 212                 typedef std::pair<std::string, std::string> String_Pair;
 213
 214                 const std::list<const Face*>::const_iterator end(git->faces.end());
 215
 216                 // submesh starts here
 217                 if(objs)
 218                 {
 219                         out << "\no ";
 220                 } else {
 221                         out << "\ng ";
 222                 }
 223                 out << git->name.c_str() << "\n";
 224
 225                 // material
 226                 if(expmat && mode == COLLAPSE_ALL)
 227                 {
 228                         out << "usemtl material" << "\n\n";
 229                         materials.insert("material");
 230                 }
 231
 232                 for(std::list<const Face*>::const_iterator it(git->faces.begin()); it != end; ++it)
 233                 {
 234                         const Winding& w((*it)->getWinding());
 235
 236                         // vertices
 237                         for(size_t i = 0; i < w.numpoints; ++i)
 238                                         out << "v " << FloatFormat(w[i].vertex.x(), 1, 6) << " " << FloatFormat(w[i].vertex.z(), 1, 6) << " " << FloatFormat(w[i].vertex.y(), 1, 6) << "\n";
 239                 }
 240                 out << "\n";
 241
 242                 for(std::list<const Face*>::const_iterator it(git->faces.begin()); it != end; ++it)
 243                 {
 244                         const Winding& w((*it)->getWinding());
 245
 246                         // texcoords
 247                         for(size_t i = 0; i < w.numpoints; ++i)
 248                                 out << "vt " << FloatFormat(w[i].texcoord.x(), 1, 6) << " " << FloatFormat(w[i].texcoord.y(), 1, 6) << "\n";
 249                 }
 250
 251                 for(std::list<const Face*>::const_iterator it(git->faces.begin()); it != end; ++it)
 252                 {
 253                         const Winding& w((*it)->getWinding());
 254
 255                         // faces
 256                         StringOutputStream faceLine(256);
 257                         faceLine << "\nf";
 258                         for(size_t i = 0; i < w.numpoints; ++i, ++vertex_count)
 259                         {
 260                                 faceLine << " " << vertex_count+1 << "/" << vertex_count+1;
 261                         }
 262
 263                         if(mode != COLLAPSE_ALL)
 264                         {
 265                                 materials.insert((*it)->getShader().getShader());
 266                                 brushMaterials.insert(String_Pair((*it)->getShader().getShader(), faceLine.c_str()));
 267                         } else {
 268                                 out << faceLine.c_str();
 269                         }
 270                 }
 271
 272                 if(mode != COLLAPSE_ALL)
 273                 {
 274                         std::string lastMat;
 275                         std::string mat;
 276                         std::string faces;
 277
 278                         for(bm::iterator iter = brushMaterials.begin(); iter != brushMaterials.end(); iter++)
 279                         {
 280                                 mat = (*iter).first.c_str();
 281                                 faces = (*iter).second.c_str();
 282
 283                                 if(mat != lastMat)
 284                                 {
 285                                         if(limNames && mat.size() > MAX_MATERIAL_NAME)
 286                                         {
 287                                                 out << "\nusemtl " << mat.substr(mat.size() - MAX_MATERIAL_NAME, mat.size()).c_str();
 288                                         } else {
 289                                                 out << "\nusemtl " << mat.c_str();
 290                                         }
 291                                 }
 292
 293                                 out << faces.c_str();
 294                                 lastMat = mat;
 295                         }
 296                 }
 297
 298                 out << "\n";
 299         }
 300
 301         if(expmat)
 302         {
 303                 TextFileOutputStream outMtl(mtlFile.c_str());
 304                 if(outMtl.failed())
 305                 {
 306                         globalErrorStream() << "Unable to open material file\n";
 307                         return false;
 308                 }
 309
 310                 outMtl << "# Wavefront material file exported with NetRadiants brushexport plugin.\n";
 311                 outMtl << "# Material Count: " << (const Unsigned)materials.size() << "\n\n";
 312                 for(std::set<std::string>::const_iterator it(materials.begin()); it != materials.end(); ++it)
 313                 {
 314                         if(limNames && it->size() > MAX_MATERIAL_NAME)
 315                         {
 316                                 outMtl << "newmtl " << it->substr(it->size() - MAX_MATERIAL_NAME, it->size()).c_str() << "\n";
 317                         } else {
 318                                 outMtl << "newmtl " << it->c_str() << "\n";
 319                         }
 320                 }
 321         }
 322
 323         return true;
 324 }
 325
 326
 327 class ForEachFace : public BrushVisitor
 328 {
 329 public:
 330         ForEachFace(ExportData& _exporter)
 331                 : exporter(_exporter)
 332         {}
 333
 334         void visit(Face& face) const
 335         {
 336                 exporter.AddBrushFace(face);
 337         }
 338
 339 private:
 340         ExportData& exporter;
 341 };
 342
 343 class ForEachSelected : public SelectionSystem::Visitor
 344 {
 345 public:
 346         ForEachSelected(ExportData& _exporter)
 347                 : exporter(_exporter)
 348         {}
 349
 350         void visit(scene::Instance& instance) const
 351     {
 352                 BrushInstance* bptr = InstanceTypeCast<BrushInstance>::cast(instance);
 353                 if(bptr)
 354                 {
 355                         Brush& brush(bptr->getBrush());
 356
 357                         exporter.BeginBrush(brush);
 358                                 ForEachFace face_vis(exporter);
 359                                 brush.forEachFace(face_vis);
 360                         exporter.EndBrush();
 361                 }
 362     }
 363
 364 private:
 365         ExportData& exporter;
 366 };
 367
 368 bool ExportSelection(const std::set<std::string>& ignorelist, collapsemode m, bool exmat, const std::string& path, bool limNames, bool objs)
 369 {
 370         ExportDataAsWavefront exporter(ignorelist, m, exmat, limNames, objs);
 371
 372         ForEachSelected vis(exporter);
 373         GlobalSelectionSystem().foreachSelected(vis);
 374
 375         return exporter.WriteToFile(path, m);
 376 }