source: trunk/VUT/GtpVisibilityPreprocessor/src/Preprocessor.cpp @ 444

#include "SceneGraph.h"
#include "Exporter.h"
#include "UnigraphicsParser.h"
#include "X3dParser.h"
#include "Preprocessor.h"
#include "ViewCell.h"
#include "Environment.h"
#include "ViewCellsManager.h"

Preprocessor::Preprocessor():
mKdTree(NULL),
mBspTree(NULL),
mVspKdTree(NULL),
mViewCellsManager(NULL)
{
}


Preprocessor::~Preprocessor()
{
        DEL_PTR(mBspTree);
        DEL_PTR(mKdTree);
        DEL_PTR(mVspKdTree);
        DEL_PTR(mViewCellsManager);
}

int
SplitFilenames(const string str, vector<string> &filenames)
{
        int pos = 0;

        while(1) {
                int npos = str.find(';', pos);
                
                if (npos < 0 || npos - pos < 1)
                        break;
                filenames.push_back(string(str, pos, npos - pos));
                pos = npos + 1;
        }
        
        filenames.push_back(string(str, pos, str.size() - pos));
        return (int)filenames.size();
}

bool
Preprocessor::LoadScene(const string filename)
{
  // use leaf nodes of the original spatial hiearrchy as occludees

  mSceneGraph = new SceneGraph;

  
  Parser *parser;
        vector<string> filenames;
        int files = SplitFilenames(filename, filenames);
        cout<<files<<endl;
        bool result = false;
        if (files == 1) {
                
                if (strstr(filename.c_str(), ".x3d"))
                        parser = new X3dParser;
                else
                        parser = new UnigraphicsParser;

                cout<<filename<<endl;
                result = parser->ParseFile(filename, &mSceneGraph->mRoot);

                delete parser;

        } else {
                // root for different files
                mSceneGraph->mRoot = new SceneGraphNode;
                for (int i= 0; i < filenames.size(); i++) {
                        if (strstr(filenames[i].c_str(), ".x3d"))
                                parser = new X3dParser;
                        else
                                parser = new UnigraphicsParser;
                        
                        SceneGraphNode *node;
                        if (parser->ParseFile(filenames[i], &node)) {
                                mSceneGraph->mRoot->mChildren.push_back(node);
                                // at least one file parsed
                                result = true;
                        }
                        delete parser;
                }
        }
        

        if (result) {
                mSceneGraph->AssignObjectIds();
                int intersectables, faces;
                mSceneGraph->GetStatistics(intersectables, faces);
                cout<<filename<<" parsed successfully."<<endl;
                cout<<"#NUM_OBJECTS (Total numner of objects)\n"<<intersectables<<endl;
                cout<<"#NUM_FACES (Total numner of faces)\n"<<faces<<endl;
        }

        
  return result;
}

bool
Preprocessor::ExportPreprocessedData(const string filename)
{
  return false;
}

bool
Preprocessor::BuildKdTree()
{
  mKdTree = new KdTree;
  // add mesh instances of the scene graph to the root of the tree
  KdLeaf *root = (KdLeaf *)mKdTree->GetRoot();
  mSceneGraph->CollectObjects(&root->mObjects);
  
  mKdTree->Construct();
  return true;
}

void
Preprocessor::KdTreeStatistics(ostream &s)
{
  s<<mKdTree->GetStatistics();
}

void
Preprocessor::BspTreeStatistics(ostream &s)
{
        s << mBspTree->GetStatistics();
}

bool
Preprocessor::Export( const string filename,
                                                                                        const bool scene,
                                                                                        const bool kdtree,
                                                                                        const bool bsptree
                                                                                        )
{
  Exporter *exporter = Exporter::GetExporter(filename);
        
  if (exporter) {
    if (scene)
      exporter->ExportScene(mSceneGraph->mRoot);

    if (kdtree) {
      exporter->SetWireframe();
      exporter->ExportKdTree(*mKdTree);
    }

        if (bsptree) {
                //exporter->SetWireframe();
                exporter->ExportBspTree(*mBspTree);
        }

    delete exporter;
    return true;
  }

  return false;
}

bool Preprocessor::PrepareViewCells()
{
        //-- parse type of view cell container
        char viewCellsStr[64];
        environment->GetStringValue("ViewCells.type", viewCellsStr);

        if (strcmp(viewCellsStr, "kdTree") == 0)
        {
                mViewCellsManager = new KdViewCellsManager(mKdTree);
        }
        if (strcmp(viewCellsStr, "bspTree") == 0)
        {
                int bspConstructionSamples = 0;

                mBspTree = new BspTree();

                environment->GetIntValue("BspTree.Construction.samples", bspConstructionSamples);
                mViewCellsManager = new BspViewCellsManager(mBspTree, bspConstructionSamples);
        }
        else if (strcmp(viewCellsStr, "vspTree") == 0)
        {
                int vspKdConstructionSamples = 0;
                
                environment->GetIntValue("VspKdTree.Construction.samples", vspKdConstructionSamples);
        mViewCellsManager = new VspKdViewCellsManager(mVspKdTree, vspKdConstructionSamples);
        }
        else if (strcmp(viewCellsStr, "sceneDependent") == 0)
        {
                //TODO
                int bspConstructionSamples = 0;

                environment->GetIntValue("BspTree.Construction.samples", bspConstructionSamples);
                mViewCellsManager = new BspViewCellsManager(mBspTree, bspConstructionSamples);
        }
        else
        {
                cerr<<"Wrong view cells type" << viewCellsStr << endl;
                exit(1);
        }

        int postProcessSamples = 0;
        int visSamples = 0;

        environment->GetIntValue("ViewCells.PostProcessing.samples", postProcessSamples);
        environment->GetIntValue("BspTree.Visualization.samples", visSamples);

        mViewCellsManager->SetPostProcessSamples(postProcessSamples);
        mViewCellsManager->SetVisualizationSamples(visSamples);

        //Debug << "Visualization samples: " << mViewCellsManager->GetVisualizationSamples() << endl;

        //-- parse view cells construction method

        bool loadViewCells = false;
        environment->GetBoolValue("ViewCells.loadFromFile", loadViewCells);

        //-- load view cells from file if requested
        if (loadViewCells)
        {
                char buff[100];
                environment->GetStringValue("ViewCells.filename", buff);
                string vcFilename(buff);
                mViewCellsManager->LoadViewCells(vcFilename);
        }

        return true;
}