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A lightweight C++ OpenGL middleware for 2D/3D graphics
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X:/dropbox/visualizationlibrary/src/vlGraphics/plugins/ioSTL.cpp

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00001 /**************************************************************************************/
00002 /*                                                                                    */
00003 /*  Visualization Library                                                             */
00004 /*  http://www.visualizationlibrary.org                                               */
00005 /*                                                                                    */
00006 /*  Copyright (c) 2005-2010, Michele Bosi                                             */
00007 /*  All rights reserved.                                                              */
00008 /*                                                                                    */
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00010 /*  are permitted provided that the following conditions are met:                     */
00011 /*                                                                                    */
00012 /*  - Redistributions of source code must retain the above copyright notice, this     */
00013 /*  list of conditions and the following disclaimer.                                  */
00014 /*                                                                                    */
00015 /*  - Redistributions in binary form must reproduce the above copyright notice, this  */
00016 /*  list of conditions and the following disclaimer in the documentation and/or       */
00017 /*  other materials provided with the distribution.                                   */
00018 /*                                                                                    */
00019 /*  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND   */
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00022 /*  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR  */
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00029 /*                                                                                    */
00030 /**************************************************************************************/
00031 
00032 #include "ioSTL.hpp"
00033 #include <vlCore/Log.hpp>
00034 #include <vlCore/Say.hpp>
00035 #include <vlCore/VisualizationLibrary.hpp>
00036 #include <vlCore/FileSystem.hpp>
00037 #include <vlCore/TextStream.hpp>
00038 #include <vlCore/VirtualFile.hpp>
00039 #include <vlGraphics/Effect.hpp>
00040 #include <vlGraphics/Actor.hpp>
00041 #include <vlCore/LoadWriterManager.hpp>
00042 #include <stdio.h>
00043 
00044 using namespace vl;
00045 //-----------------------------------------------------------------------------
00046 ref<ResourceDatabase> vl::loadSTL(const String& path)
00047 {
00048   ref<VirtualFile> file = defFileSystem()->locateFile(path);
00049 
00050   if (file)
00051     return loadSTL( file.get() );
00052   else
00053   {
00054     Log::error( Say("Could not locate '%s'.\n") << path );
00055     return NULL;
00056   }
00057 }
00058 //-----------------------------------------------------------------------------
00059 ref<ResourceDatabase> vl::loadSTL(VirtualFile* file)
00060 {
00061   STLLoader stl;
00062   ref<ResourceDatabase> res_db = stl.loadSTL(file);
00063   return res_db;
00064 }
00065 //-----------------------------------------------------------------------------
00066 ref<ResourceDatabase> STLLoader::loadBinary(VirtualFile* file)
00067 {
00068   // skip header
00069   char header[80];
00070   file->read(header,80);
00071   unsigned int tri_count = file->readUInt32();
00072 
00073   ref<ArrayFloat3>  verts   = new ArrayFloat3;
00074   ref<ArrayFloat3>  normals = new ArrayFloat3;
00075   verts->resize(tri_count*3);
00076   normals->resize(tri_count*3);
00077   ref<DrawArrays> de = new DrawArrays(PT_TRIANGLES,0,tri_count*3);
00078   ref<Geometry> geom = new Geometry;
00079   geom->drawCalls()->push_back(de.get());
00080   geom->setVertexArray(verts.get());
00081   geom->setNormalArray(normals.get());
00082 
00083   // read triangles
00084   for(unsigned int i=0; i<tri_count; ++i)
00085   {
00086     fvec3 n,v1,v2,v0;
00087     n.x() = file->readFloat();
00088     n.y() = file->readFloat();
00089     n.z() = file->readFloat();
00090     v0.x() = file->readFloat();
00091     v0.y() = file->readFloat();
00092     v0.z() = file->readFloat();
00093     v1.x() = file->readFloat();
00094     v1.y() = file->readFloat();
00095     v1.z() = file->readFloat();
00096     v2.x() = file->readFloat();
00097     v2.y() = file->readFloat();
00098     v2.z() = file->readFloat();
00099     // skip the 2 bytes
00100     file->readUInt16();
00101     normals->at(i*3+0) = n;
00102     verts->at(i*3+0) = v0;
00103     normals->at(i*3+1) = n;
00104     verts->at(i*3+1) = v1;
00105     normals->at(i*3+2) = n;
00106     verts->at(i*3+2) = v2;
00107   }
00108 
00109   ref<ResourceDatabase> res_db = new ResourceDatabase;
00110   ref<Effect> effect = new Effect;
00111   res_db->resources().push_back( geom );
00112   res_db->resources().push_back( new Actor(geom.get(), effect.get(), NULL ) );
00113   res_db->resources().push_back( effect.get() );
00114   return res_db;
00115 }
00116 ref<ResourceDatabase> STLLoader::loadAscii(VirtualFile* file)
00117 {
00118   TextStream line_reader;
00119   line_reader.setInputFile(file);
00120   std::string str;
00121 
00122   // skip header
00123   line_reader.readLine(str);
00124 
00125   std::vector<fvec3> verts;
00126   std::vector<fvec3> norms;
00127 
00128   fvec3 v[3], n;
00129   char parola1[32];
00130   char parola2[32];
00131   while( line_reader.readLine(str) )
00132   {
00133     sscanf(str.c_str(), "%s %s %f %f %f", parola1, parola2, &n.x(), &n.y(), &n.z());
00134     // skip outer loop
00135     line_reader.readLine(str);
00136     line_reader.readLine(str); sscanf(str.c_str(), "%s %f %f %f", parola1, &v[0].x(), &v[0].y(), &v[0].z());
00137     line_reader.readLine(str); sscanf(str.c_str(), "%s %f %f %f", parola1, &v[1].x(), &v[1].y(), &v[1].z());
00138     line_reader.readLine(str); sscanf(str.c_str(), "%s %f %f %f", parola1, &v[2].x(), &v[2].y(), &v[2].z());
00139     // skip endloop
00140     line_reader.readLine(str);
00141     // skip endfacet
00142     line_reader.readLine(str);
00143     // emit triangle
00144     norms.push_back(n);
00145     norms.push_back(n);
00146     norms.push_back(n);
00147     verts.push_back(v[0]);
00148     verts.push_back(v[1]);
00149     verts.push_back(v[2]);
00150   }
00151 
00152   ref<ArrayFloat3>  vertices   = new ArrayFloat3;
00153   ref<ArrayFloat3>  normals = new ArrayFloat3;
00154   vertices->resize(verts.size());
00155   normals->resize(verts.size());
00156   memcpy(normals ->ptr(), &norms[0], sizeof(norms[0])*norms.size());
00157   memcpy(vertices->ptr(), &verts[0], sizeof(verts[0])*verts.size());
00158   ref<DrawArrays> de = new DrawArrays(PT_TRIANGLES,0,verts.size());
00159   ref<Geometry> geom = new Geometry;
00160   geom->drawCalls()->push_back(de.get());
00161   geom->setVertexArray(vertices.get());
00162   geom->setNormalArray(normals.get());
00163 
00164   ref<ResourceDatabase> res_db = new ResourceDatabase;
00165   ref<Effect> effect = new Effect;
00166   res_db->resources().push_back( geom );
00167   res_db->resources().push_back( new Actor(geom.get(), effect.get(), NULL ) );
00168   res_db->resources().push_back( effect.get() );
00169   return res_db;
00170 }
00171 ref<ResourceDatabase> STLLoader::loadSTL(VirtualFile* file)
00172 {
00173   file->open(OM_ReadOnly);
00174 
00175   char header[] = {1,2,3,4,5,0};
00176 
00177   file->read(header,5);
00178   ref<ResourceDatabase> res_db;
00179   if (strcmp((char*)header,"solid") == 0)
00180   {
00181     // ascii
00182     file->seekSet(0);
00183     res_db = loadAscii(file);
00184   }
00185   else
00186   {
00187     // binary
00188     file->seekSet(0);
00189     res_db = loadBinary(file);
00190   }
00191 
00192   file->close();
00193   return res_db;
00194 }
00195 //-----------------------------------------------------------------------------

Visualization Library 2011.09.1160 Reference Documentation
Copyright 2005-2011 Michele Bosi. All rights reserved.
Updated on Thu May 2 2013 13:40:39.
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