Util.h

   1 /*
   2 *       Glide64 - Glide video plugin for Nintendo 64 emulators.
   3 *       Copyright (c) 2002  Dave2001
   4 *
   5 *       This program is free software; you can redistribute it and/or modify
   6 *       it under the terms of the GNU General Public License as published by
   7 *       the Free Software Foundation; either version 2 of the License, or
   8 *       any later version.
   9 *
  10 *       This program is distributed in the hope that it will be useful,
  11 *       but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 *       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 *       GNU General Public License for more details.
  14 *
  15 *       You should have received a copy of the GNU General Public License
  16 *       along with this program; if not, write to the Free Software
  17 *       Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18 */
  19
  20 //****************************************************************
  21 //
  22 // Glide64 - Glide Plugin for Nintendo 64 emulators (tested mostly with Project64)
  23 // Project started on December 29th, 2001
  24 //
  25 // To modify Glide64:
  26 // * Write your name and (optional)email, commented by your work, so I know who did it, and so that you can find which parts you modified when it comes time to send it to me.
  27 // * Do NOT send me the whole project or file that you modified.  Take out your modified code sections, and tell me where to put them.  If people sent the whole thing, I would have many different versions, but no idea how to combine them all.
  28 //
  29 // Official Glide64 development channel: #Glide64 on EFnet
  30 //
  31 // Original author: Dave2001 (Dave2999@hotmail.com)
  32 // Other authors: Gonetz, Gugaman
  33 //
  34 //****************************************************************
  35
  36 #ifndef Util_H
  37 #define Util_H
  38
  39 #define NOT_TMU0        0x00
  40 #define NOT_TMU1        0x01
  41 #define NOT_TMU2        0x02
  42
  43 void util_init ();
  44 void clip_z ();
  45 void clip_tri (WORD linew = 0);
  46
  47 BOOL cull_tri (VERTEX **v);
  48 void DrawTri (VERTEX **v, WORD linew = 0);
  49 void do_triangle_stuff (WORD linew = 0);
  50 void do_triangle_stuff_2 (WORD linew = 0);
  51 void add_tri (VERTEX *v, int n, int type);
  52 void apply_shade_mods (VERTEX *v);
  53
  54 void update ();
  55 void update_scissor ();
  56
  57 void set_message_combiner ();
  58
  59 void fix_tex_coord (VERTEX **v);
  60
  61 // positional and texel coordinate clipping
  62 #define CCLIP(ux,lx,ut,lt,uc,lc) \
  63                 if (ux > lx || lx < uc || ux > lc) { rdp.tri_n += 2; return; } \
  64                 if (ux < uc) { \
  65                         float p = (uc-ux)/(lx-ux); \
  66                         ut = p*(lt-ut)+ut; \
  67                         ux = uc; \
  68                 } \
  69                 if (lx > lc) { \
  70                         float p = (lc-ux)/(lx-ux); \
  71                         lt = p*(lt-ut)+ut; \
  72                         lx = lc; \
  73                 }
  74
  75 #define CCLIP2(ux,lx,ut,lt,un,ln,uc,lc) \
  76                 if (ux > lx || lx < uc || ux > lc) { rdp.tri_n += 2; return; } \
  77                 if (ux < uc) { \
  78                         float p = (uc-ux)/(lx-ux); \
  79                         ut = p*(lt-ut)+ut; \
  80                         un = p*(ln-un)+un; \
  81                         ux = uc; \
  82                 } \
  83                 if (lx > lc) { \
  84                         float p = (lc-ux)/(lx-ux); \
  85                         lt = p*(lt-ut)+ut; \
  86                         ln = p*(ln-un)+un; \
  87                         lx = lc; \
  88                 }
  89
  90 #endif  // ifndef Util_H