# Visualization Library

A lightweight C++ OpenGL middleware for 2D/3D graphics

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# D:/VL/BuildSystem/VL_DISTRO/Visualization_Library_SDK/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 /*                                                                                    */
    00009 /*  Redistribution and use in source and binary forms, with or without modification,  */
    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   */
    00020 /*  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED     */
    00021 /*  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE            */
    00022 /*  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR  */
    00023 /*  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES    */
    00024 /*  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;      */
    00025 /*  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON    */
    00026 /*  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT           */
    00027 /*  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS     */
    00028 /*  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.                      */
    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 v2011.09.1162 Reference Documentation
Copyright 2005-2011 Michele Bosi. All rights reserved.
Updated on Thu Jan 26 2012 00:43:41.
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