source: trunk/VUT/GtpVisibilityPreprocessor/src/Preprocessor.cpp @ 242

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

  
bool
Preprocessor::LoadViewcells(const string filename)
{
  
  return true;
}

bool
Preprocessor::GenerateViewcells()
{
        return BuildBspTree();
}

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

  mSceneGraph = new SceneGraph;

  
  Parser *parser;

  if (strstr(filename.c_str(), ".x3d"))
    parser = new X3dParser;
  else
    parser = new UnigraphicsParser;

  bool result = parser->ParseFile(filename, &mSceneGraph->mRoot);
  
  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;
}

bool
Preprocessor::BuildBspTree()
{
        ObjectContainer objects;
        mSceneGraph->CollectObjects(&objects);

        mBspTree = new BspTree();

        char constructionMethodStr[64];
        int maxViewCells = 0;

        environment->GetIntValue("BspTree.maxViewCells", maxViewCells);
        environment->GetStringValue("BspTree.constructionMethod", constructionMethodStr);

        int constructionMethod = BspTree::VIEWCELLS;
        
        if (strcmp(constructionMethodStr, "viewCells") == 0)
                constructionMethod = BspTree::VIEWCELLS;
        else if (strcmp(constructionMethodStr, "sceneGeometry") == 0)
                constructionMethod = BspTree::SCENE_GEOMETRY;
        else 
        {
                cerr << "Wrong bsp construction method " << constructionMethodStr << endl;
                exit(1);
    }

        switch (constructionMethod)
        {
        case BspTree::VIEWCELLS:

                mViewcells.clear();
                
                // derive viewcells from the scene objects
                ViewCell::DeriveViewCells(objects, mViewcells, maxViewCells);
                
                mBspTree->Construct(mViewcells);
                break;
        case BspTree::SCENE_GEOMETRY:
                mBspTree->Construct(objects);
                break;
        default:
                break;
        }
        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;
}