/********************************************************************** <BR>
  This file is part of Crack dot Com's free source code release of
  Golgotha. <a href="http://www.crack.com/golgotha_release"> <BR> for
  information about compiling & licensing issues visit this URL</a> 
  <PRE> If that doesn't help, contact Jonathan Clark at 
  golgotha_source@usa.net (Subject should have "GOLG" in it) 
***********************************************************************/

#include "lisp/li_vect.hh"
#include "lisp/lisp.hh"
#include "file/file.hh"
#include "loaders/dir_save.hh"
#include "loaders/dir_load.hh"
#include "lisp/li_init.hh"

li_type_number li_vect_type;
class li_vect_type_function_table : public li_type_function_table
{ 
public:
  // free data associated with an instance of this type
  virtual void free(li_object   *o)
  {
    delete li_vect::get(o,0)->v;
  }

  virtual int equal(li_object  *o1, li_object *o2) 
  { 
    i4_3d_vector v1=li_vect::get(o1,0)->value(), v2=li_vect::get(o2,0)->value();
    return v1.x==v2.x && v1.y==v2.y && v1.z==v1.z;
  }

  virtual void print(li_object  *o, i4_file_class *stream)
  {
    i4_3d_vector v=li_vect::get(o,0)->value();
    stream->printf("(vector %f %f %f)",v.x, v.y, v.z);
  }

  virtual char *name() { return "vector"; }

  virtual li_object *create(li_object *params, li_environment *env)
  {
    i4_3d_vector v;
    if (params)
    {
      v.x=li_get_float(li_eval(li_car(params,env), env),env); params=li_cdr(params,env);
      v.y=li_get_float(li_eval(li_car(params,env), env),env); params=li_cdr(params,env);
      v.z=li_get_float(li_eval(li_car(params,env), env),env); params=li_cdr(params,env);
    }
      
    return new li_vect(v);
  }


  virtual void save_object(i4_saver_class *fp, li_object *o, li_environment *env)
  {
    i4_3d_vector v=li_vect::get(o,env)->value();
    fp->write_float(v.x);
    fp->write_float(v.y);
    fp->write_float(v.z);

  }

  virtual li_object *load_object(i4_loader_class *fp, li_type_number *type_remap,
                                 li_environment *env)
  {
    i4_3d_vector v;
    v.x=fp->read_float();
    v.y=fp->read_float();
    v.z=fp->read_float();
    return new li_vect(v);
  }
};

li_automatic_add_type(li_vect_type_function_table, li_vect_type);