83bf813e58
instead of osgDB::Registry where it original lay. This has been done to allow fileName strings to be encode data rather than just file names, such as one requires when using PagedLOD along with plugins for doing dynamic tesselation.
161 lines
5.6 KiB
C++
161 lines
5.6 KiB
C++
#include <osg/Notify>
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#include <osg/Geode>
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#include <osg/Geometry>
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#include <osgDB/FileNameUtils>
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#include <osgDB/FileUtils>
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#include <osgDB/Registry>
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#include <iostream>
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#include <stdio.h>
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using namespace osg;
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class ReaderWriter3DC : public osgDB::ReaderWriter
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{
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public:
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virtual const char* className() { return "3DC point cloud reader"; }
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virtual bool acceptsExtension(const std::string& extension)
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{
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return osgDB::equalCaseInsensitive(extension,"3dc") ||
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osgDB::equalCaseInsensitive(extension,"asc");
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}
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virtual ReadResult readNode(const std::string& file, const osgDB::ReaderWriter::Options*)
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{
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std::string ext = osgDB::getLowerCaseFileExtension(file);
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if (!acceptsExtension(ext)) return ReadResult::FILE_NOT_HANDLED;
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std::string fileName = osgDB::findDataFile( file );
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if (fileName.empty()) return ReadResult::FILE_NOT_FOUND;
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std::cout << "try to read file "<<fileName<<std::endl;
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const int LINE_SIZE = 1024;
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char line[LINE_SIZE];
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std::ifstream fin(fileName.c_str());
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unsigned int num = 0;
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while (fin)
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{
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fin.getline(line,LINE_SIZE);
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if (line[0]=='#')
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{
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// comment line
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std::cout <<"Comment: "<<line<<std::endl;
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}
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else
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{
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++num;
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}
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//std::cout << "["<<std::endl;
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//std::cout <<line<<std::endl;
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//std::cout <<"]"<<std::endl;
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}
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std::cout << "num="<<num<<std::endl;
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unsigned int targetNumVertices = 10000;
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osg::Geode* geode = new osg::Geode;
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osg::Geometry* geometry = new osg::Geometry;
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osg::Vec3Array* vertices = new osg::Vec3Array;
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osg::Vec3Array* normals = new osg::Vec3Array;
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osg::UByte4Array* colours = new osg::UByte4Array;
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vertices->reserve(targetNumVertices);
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normals->reserve(targetNumVertices);
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colours->reserve(targetNumVertices);
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fin.close();
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std::ifstream fin2(fileName.c_str());
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while (fin2)
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{
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fin2.getline(line,LINE_SIZE);
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if (line[0]=='#')
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{
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// comment line
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//std::cout <<"Comment: "<<line<<std::endl;
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}
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else if (strlen(line)>0)
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{
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++num;
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osg::Vec3 pos,normal;
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int r,g,b;
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int a = sscanf(line,"%f %f %f %d %d %d %f %f %f",
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&pos.x(),&pos.y(),&pos.z(),
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&r,&g,&b,
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&normal.x(),&normal.y(),&normal.z());
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if (a)
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{
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if (vertices->size()>=targetNumVertices)
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{
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// finishing setting up the current geometry and add it to the geode.
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geometry->setUseDisplayList(true);
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geometry->setUseVertexBufferObjects(true);
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geometry->setVertexArray(vertices);
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geometry->setNormalArray(normals);
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geometry->setNormalBinding(osg::Geometry::BIND_PER_VERTEX);
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geometry->setColorArray(colours);
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geometry->setColorBinding(osg::Geometry::BIND_PER_VERTEX);
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geometry->addPrimitiveSet(new osg::DrawArrays(GL_POINTS,0,vertices->size()));
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geode->addDrawable(geometry);
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// allocate a new geometry
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geometry = new osg::Geometry;
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vertices = new osg::Vec3Array;
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normals = new osg::Vec3Array;
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colours = new osg::UByte4Array;
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vertices->reserve(targetNumVertices);
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normals->reserve(targetNumVertices);
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colours->reserve(targetNumVertices);
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}
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vertices->push_back(pos);
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normals->push_back(normal);
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colours->push_back(osg::UByte4(r,g,b,255));
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}
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}
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}
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geometry->setUseDisplayList(true);
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geometry->setUseVertexBufferObjects(true);
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geometry->setVertexArray(vertices);
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geometry->setNormalArray(normals);
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geometry->setNormalBinding(osg::Geometry::BIND_PER_VERTEX);
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geometry->setColorArray(colours);
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geometry->setColorBinding(osg::Geometry::BIND_PER_VERTEX);
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geometry->addPrimitiveSet(new osg::DrawArrays(GL_POINTS,0,vertices->size()));
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geode->addDrawable(geometry);
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return geode;
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}
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};
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// now register with Registry to instantiate the above
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// reader/writer.
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osgDB::RegisterReaderWriterProxy<ReaderWriter3DC> g_readerWriter_3DX_Proxy;
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