/*
 * 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
 *
 */
/******************************************************************************
*
*                Utilities for reading BOG file format
*
*    Standard:   Useing standard suggested in bogfileformat.html with 
*                rcs version 1.2 from the pvvmud web pages
*
*
******************************************************************************/

#include "pvvmud.H"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <iostream.h>

#include "geometry.H"
#include "bogfile.H"
#include "exception.H"

//void CGeometry::load(int objId, char * name) {
//  setId(objId);
//  load(name);
//}

void CGeometry::load(char * name) {
  FILE * bog;
  bog = fopen(name,"r");
  if (bog == NULL){
    cdebug << "Error: Failed to open BOG file " << name << "\n";
    throw new CException();
  }
  readBOG(bog);
  fclose(bog);
}
  

int CGeometry::readBOGCore(FILE * bog, int numV, int numN,
                               int numTC, int numP){
  int ii,jj;
  int type,gltype,materialId,index;
  double d1,d2,d3;
  CPolygon * poly;

  for (ii = 0; ii < numV; ii++){
    fscanf(bog,"%lf %lf %lf",&d1,&d2,&d3);
    addVertex(d1,d2,d3);
  }

  for (ii = 0; ii < numN; ii++){
    fscanf(bog,"%lf %lf %lf",&d1,&d2,&d3);
    addNormal(d1,d2,d3);
  }

  for (ii = 0; ii < numTC; ii++){
    fscanf(bog,"%lf %lf",&d1,&d2);
    addTexCoord(d1,d2);
  }

  for (ii = 0; ii < numP; ii++){
    fscanf(bog,"%i %i %i %i %i",&type,&materialId,&numV,&numN,&numTC);

    switch (type){
    case PT_Polygon: gltype = POLYGON_POLYGON; break;
    case PT_Triangles: gltype = POLYGON_TRIANGLES; break;
    case PT_Quads: gltype = POLYGON_QUADS; break;
    case PT_Quad_strip: gltype = POLYGON_QUAD_STRIP; break;
    case PT_Triangle_strip: gltype = POLYGON_TRIANGLE_STRIP; break;
    case PT_Triangle_fan: gltype = POLYGON_TRIANGLE_FAN; break;
    }
    
    poly = new CPolygon(gltype,materialId,numV,numN,numTC);

    for (jj = 0; jj < numV; jj++){
      fscanf(bog,"%i",&index);
      poly->addVertexIndex(index);
    }
    
    for (jj = 0; jj < numN; jj++){
      fscanf(bog,"%i",&index);
      poly->addNormalIndex(index);
    }
    
    for (jj = 0; jj < numTC; jj++){
      fscanf(bog,"%i",&index);
      poly->addTexCoordIndex(index);
    }
    
    addPolygon(poly);
    
  }

  return TRUE;
}


void CGeometry::readBOG(FILE * bog ){

  CGeometry *geo=NULL,*lastgeo=NULL;
  int version,numSub,subid;
  int numV,numN,numTC,numP;
  int ii;
  char name[5];

  // Read header : BOG <version> <numSubObjects>

  fscanf(bog,"%s",name);

  if (strcmp(name,"BOG") != 0){
    throw new CException();
  } else {
    fscanf(bog,"%i %i",&version,&numSub);
    if (version != 1) throw new CException();
  }

  geo = this;

  for (ii = 0; ii < numSub; ii++){

    fscanf(bog,"%i",&subid);

    fscanf(bog,"%i %i %i %i",&numV,&numN,&numTC,&numP);

    if (ii != 0){ 
      geo = newGeometry(getId());
    }

    geo->setSize(numV,numN,numTC,numP);

    if (lastgeo != NULL){
      lastgeo->setNext(geo);
    }

    geo->setSubId(subid);    
    geo->readBOGCore(bog,numV,numN,numTC,numP);
    lastgeo = geo;
  }

}