source: GTP/trunk/Lib/Vis/Preprocessing/src/SceneGraph.cpp @ 1002

//#include <boost/algorithm/string.hpp>

#include <stack>
#include "SceneGraph.h"
#include "X3dExporter.h"
#include "Intersectable.h"


namespace GtpVisibilityPreprocessor {


bool
SceneGraph::Export( const string filename )
{
  if (strstr(filename.c_str(), ".x3d")) {
    X3dExporter exporter(filename);
    exporter.ExportScene(mRoot);
    return true;
  } else {
    cerr<<"Error: Currently unsuported export format, filename "<<filename<<endl;
    
  }
  
  
    return false;
  
}


SceneGraph::~SceneGraph()
{
        DEL_PTR(mRoot);
}


SceneGraphNode::~SceneGraphNode()
{
        CLEAR_CONTAINER(mGeometry);
        SceneGraphNodeContainer::iterator it, it_end = mChildren.end();

        // recursivly delete all children
        CLEAR_CONTAINER(mChildren);
}


int
SceneGraph::CollectObjects(ObjectContainer *instances)
{
        instances->clear();
  int number = 0;
  stack<SceneGraphNode *> nodeStack;
  
  nodeStack.push(mRoot);
  
  while (!nodeStack.empty()) {
    SceneGraphNode *node = nodeStack.top();
    nodeStack.pop();

    ObjectContainer::const_iterator mi = node->mGeometry.begin();
    for (; mi != node->mGeometry.end(); mi++)
          instances->push_back(*mi);
        
    SceneGraphNodeContainer::iterator ni = node->mChildren.begin();
    for (; ni != node->mChildren.end(); ni++) {
      nodeStack.push(*ni);
      number++;
    }
    
  }
  return number;
}


int
SceneGraph::AssignObjectIds()
{
  int id = 1;
  stack<SceneGraphNode *> nodeStack;
  
  nodeStack.push(mRoot);
  
  while (!nodeStack.empty()) {
    SceneGraphNode *node = nodeStack.top();
    nodeStack.pop();
                
    ObjectContainer::iterator mi = node->mGeometry.begin();
    for (; mi != node->mGeometry.end(); mi++) {
          // $$ JB remove object id=2601 (for debugging purposes in atlanta scene)
          if (1) //id != 2601)
                (*mi)->SetId(id++);
          else {
                node->mGeometry.erase(mi);
                --mi;
                id++;
          }
        }
    
    SceneGraphNodeContainer::iterator ni = node->mChildren.begin();
    for (; ni != node->mChildren.end(); ni++) {
      nodeStack.push(*ni);
    }
  }
        // return max id
  return id;
}

void
SceneGraph::GetStatistics(int &intersectables, int &faces) const
{
  stack<SceneGraphNode *> nodeStack;
  
  nodeStack.push(mRoot);
  faces = 0;
        intersectables = 0;
  while (!nodeStack.empty()) {
    SceneGraphNode *node = nodeStack.top();
    nodeStack.pop();
                
    ObjectContainer::const_iterator mi = node->mGeometry.begin();
    for (; mi != node->mGeometry.end(); mi++) {
                        intersectables++;
                        faces += (*mi)->NumberOfFaces();
                }
    
    SceneGraphNodeContainer::iterator ni = node->mChildren.begin();
    for (; ni != node->mChildren.end(); ni++) {
      nodeStack.push(*ni);
    }
  }
        
}


void
SceneGraphNode::UpdateBox()
{
  AxisAlignedBox3 box;
  
  box.Initialize();
  
  ObjectContainer::const_iterator mi = mGeometry.begin();
  for (; mi != mGeometry.end(); mi++)
        box.Include((*mi)->GetBox());
  
  SceneGraphNodeContainer::iterator ni = mChildren.begin();
  for (; ni != mChildren.end(); ni++) {
        (*ni)->UpdateBox();
        box.Include((*ni)->mBox);
  }
  
  mBox = box;
}

}