/*
 * PVVMUD a 3D MUD
 * Copyright (C) 1998-1999  Programvareverkstedet (pvv@pvv.org)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
#include "pvvmud.H"
#include <iostream.h>
#include <stdio.h>
#include "bsdtree.H"

CBSDTreeNode::CBSDTreeNode(double a, double b, double c, double d){
  this->a = a;
  this->b = b;
  this->c = c;
  this->d = d;
  inNode = NULL;
  outNode = NULL;
}

int CBSDTreeNode::inside(double x, double y, double z){
  if ( (a*x + b*y + c*z + d ) >= 0.0){
    if (inNode != NULL) return inNode->inside(x,y,z);
      else return TRUE;
  } else {
    if (outNode != NULL) return outNode->inside(x,y,z);
      else return FALSE;
  }
}

CBSDTree::CBSDTree(){
  BSDTree = NULL;
}

int CBSDTree::load(char * fileName){
  FILE * bsdFile;

  if ((bsdFile = fopen(fileName,"r")) == NULL){
    cdebug << "Failed to open bsdFile " << fileName << "\n";
    return FALSE;
  }

  BSDTree = loadNode(bsdFile);

  fclose(bsdFile);
  return TRUE;
}

CBSDTreeNode * CBSDTree::loadNode(FILE * bsdFile){

  CBSDTreeNode * node;
  char nodeType[256];
  double a,b,c,d;

  if (fscanf(bsdFile,"%s",nodeType) == 1){

    if (strcmp(nodeType,"NODE") == 0){
      if (fscanf(bsdFile,"%lf %lf %lf %lf",&a,&b,&c,&d) == 4){
        node = new CBSDTreeNode(a,b,c,d);        
      } else {
        cdebug << "File format error in BSDTree file:"
             << " Error in parameters to NODE\n";
        return NULL;
      }
    } else if (strcmp(nodeType,"IN") == 0){
      return NULL;
    } else if (strcmp(nodeType,"OUT") == 0){
      return NULL;
    } else {
      cdebug << "File format error in BSDTree file: Unknown identifyer\n";
      return FALSE;
    }
    node->setInChild( loadNode(bsdFile) );
    node->setOutChild( loadNode(bsdFile) );
    return node;
  }
  return NULL;
}

int CBSDTree::inside(double x, double y, double z){
  if (BSDTree != NULL) return BSDTree->inside(x,y,z);
    else return FALSE;
}

int CBSDTree::inside(const CPosition & position){
  return inside(position.getX(),position.getY(),position.getZ());
}