ale_pos.h

   1 // Copyright 2002, 2004 David Hilvert <dhilvert@auricle.dyndns.org>,
   2 //                                    <dhilvert@ugcs.caltech.edu>
   3
   4 /*  This file is part of the Anti-Lamenessing Engine.
   5
   6     The Anti-Lamenessing Engine is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 3 of the License, or
   9     (at your option) any later version.
  10
  11     The Anti-Lamenessing Engine is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with the Anti-Lamenessing Engine; if not, write to the Free Software
  18     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19 */
  20
  21 #ifndef __ale_pos_h__
  22 #define __ale_pos_h__
  23
  24 #include "ale_fixed.h"
  25
  26 #define SINGLE 1
  27 #define DOUBLE 2
  28 #define FIXED16 3
  29 #define FIXED32 4
  30
  31 /*
  32  * Real-valued type used to represent coordinates in an image domain.
  33  */
  34
  35 #if ALE_COORDINATES == SINGLE
  36
  37 typedef float ale_pos;
  38
  39 #define ALE_POS_PRECISION_STRING "SINGLE"
  40
  41 #define ale_pos_disable_casting()
  42 #define ale_pos_enable_casting()
  43 #define ale_pos_casting_status() 1
  44
  45 #elif ALE_COORDINATES == DOUBLE
  46
  47 typedef double ale_pos;
  48
  49 #define ALE_POS_PRECISION_STRING "DOUBLE"
  50
  51 #define ale_pos_disable_casting()
  52 #define ale_pos_enable_casting()
  53 #define ale_pos_casting_status() 1
  54
  55 #elif ALE_COORDINATES == FIXED32
  56
  57 typedef ale_fixed<ale_fixed_32,16> ale_pos;
  58
  59 #define ALE_POS_PRECISION_STRING "FIXED32"
  60
  61 #define ale_pos_disable_casting() ale_pos::disable_casting()
  62 #define ale_pos_enable_casting() ale_pos::enable_casting()
  63 #define ale_pos_casting_status() ale_pos::casting_status()
  64
  65 #elif ALE_COORDINATES == FIXED16
  66
  67 typedef ale_fixed<ale_fixed_16_calc,10> ale_pos;
  68
  69 #define ALE_POS_PRECISION_STRING "FIXED16"
  70
  71 #define ale_pos_disable_casting() ale_pos::disable_casting()
  72 #define ale_pos_enable_casting() ale_pos::enable_casting()
  73 #define ale_pos_casting_status() ale_pos::casting_status()
  74
  75 #else
  76
  77 #warning Unknown positional precision in ale_pos.h: Choosing PPRECISION=SINGLE.
  78
  79 typedef float ale_pos;
  80
  81 #define ALE_POS_PRECISION_STRING "SINGLE"
  82
  83 #define ale_pos_disable_casting()
  84 #define ale_pos_enable_casting()
  85 #define ale_pos_casting_status() 1
  86
  87 #endif
  88
  89 const ale_pos ale_pos_0 = (ale_pos) 0;
  90
  91 #if ALE_COLORS == FIXED && ALE_COORDINATES == FIXED
  92
  93 #define ale_pos_to_real(x) (x)
  94 #define ale_real_to_pos(x) (x)
  95
  96 #else
  97
  98 #define ale_pos_to_real(x) (x)
  99 #define ale_real_to_pos(x) (x)
 100
 101 #endif
 102
 103 #undef SINGLE
 104 #undef DOUBLE
 105 #undef HALF
 106 #undef FIXED16
 107 #undef FIXED32
 108
 109 #endif