source: trunk/VUT/GtpVisibilityPreprocessor/src/Preprocessor.cpp @ 387

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

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


Preprocessor::~Preprocessor()
{
        DeleteViewCells();
                
        DEL_PTR(mBspTree);
        DEL_PTR(mKdTree);
}

bool
Preprocessor::LoadViewCells(const string filename)
{
        X3dParser parser;
        int maxViewCells = 0;
        environment->GetFloatValue("ViewCells.height", parser.mViewCellHeight);
        environment->GetIntValue("ViewCells.maxViewCells", maxViewCells);

        bool loaded = parser.ParseFile(filename, mViewCells);

        if (maxViewCells > 0)
        {
                while (mViewCells.size() > maxViewCells)
                {
                        ViewCell *vc = mViewCells.back();
                        DEL_PTR(vc);
                        mViewCells.pop_back();
                }
        }
        return loaded;
}

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

        if (strcmp(viewCellsStr, "bspTree") == 0)
                ViewCell::sHierarchy = ViewCell::BSP;
        else if (strcmp(viewCellsStr, "kdTree") == 0)
                ViewCell::sHierarchy = ViewCell::KD;
        else if (strcmp(viewCellsStr, "sceneDependent") == 0)
        {
                //TODO
        }
        else
        {
                cerr<<"Wrong view cells type" << viewCellsStr << endl;
                exit(1);
        }

        return true;
}

void Preprocessor::DeleteViewCells()
{
        for (int i = 0; i < mViewCells.size(); ++ i)
                delete mViewCells[i]->GetMesh();

        CLEAR_CONTAINER(mViewCells);
}

bool
Preprocessor::GenerateViewCells()
{
        // TODO
        // HACK: derive view cells from the scene objects
        ObjectContainer objects;

        int maxViewCells = 0;
        environment->GetIntValue("ViewCells.maxViewCells", maxViewCells);

        mSceneGraph->CollectObjects(&objects);
        ViewCell::DeriveViewCells(objects, mViewCells, maxViewCells);

        return true;
}

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 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;
}