ordinfo.h

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/*
Copyright (C) 2000 The Exult Team

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.
*/

#ifndef INCL_ORDINFO
#define INCL_ORDINFO  1

/*
 *  Information about an object used during render-order comparison (lt()):
 */
class Ordering_info
  {
public:
  Rectangle area;     // Area (pixels) rel. to screen.
  Shape_info& info;   // Info. about shape.
  int tx, ty, tz;     // Absolute tile coords.
  int xs, ys, zs;     // Tile dimensions.
#if 1 /* For experimental compare(). */
  int xleft, xright, ynear, yfar, zbot, ztop;
#endif
private:
  void init(const Game_object *obj)
    {
    Tile_coord t = obj->get_tile();
    tx = t.tx; ty = t.ty; tz = t.tz;
    int frnum = obj->get_framenum();
    xs = info.get_3d_xtiles(frnum);
    ys = info.get_3d_ytiles(frnum);
    zs = info.get_3d_height();
#if 1 /* For experimental compare(). */
    xleft = tx - xs + 1;
    xright = tx;
    yfar = ty - ys + 1;
    ynear = ty;
    ztop = tz + zs - 1;
    zbot = tz;
    if (!zs)    // Flat?
      zbot--;
#endif
    }
public:
  friend class Game_object;
  friend class Map_chunk;
          // Create from scratch.
  Ordering_info(Game_window *gwin, Game_object *obj)
    : area(gwin->get_shape_rect(obj)),
      info(obj->get_info())
    { init(obj); }
  Ordering_info(Game_window *gwin, Game_object *obj, Rectangle& a)
    : area(a),
      info(obj->get_info())
    { init(obj); }
  };

#endif

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