ucode03.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 // March 2002 Created by Gonetz (Gonetz@ngs.ru)
  37 // Info about this ucode is taken from Daedalus source. Thanks to Daedalus team.
  38 //
  39 //****************************************************************
  40
  41 //
  42 // vertex - loads vertices
  43 //
  44
  45 static void uc3_vertex()
  46 {
  47   DWORD addr = segoffset(rdp.cmd1) & 0x00FFFFFF;
  48   int v0, i, n;
  49   float x, y, z;
  50
  51   rdp.v0 = v0 = ((rdp.cmd0 >> 16) & 0xFF)/5;      // Current vertex
  52   rdp.vn = n = (WORD)((rdp.cmd0&0xFFFF) + 1)/0x210;    // Number to copy
  53
  54   FRDP ("uc3:vertex v0:%d, n:%d, from: %08lx\n", v0, n, addr);
  55
  56   if (v0 >= 32)
  57     v0 = 31;
  58
  59   if ((v0 + n) > 32)
  60   {
  61     n = 32 - v0;
  62   }
  63
  64   // This is special, not handled in update(), but here
  65   // * Matrix Pre-multiplication idea by Gonetz (Gonetz@ngs.ru)
  66   if (rdp.update & UPDATE_MULT_MAT)
  67   {
  68     rdp.update ^= UPDATE_MULT_MAT;
  69     MulMatrices(rdp.model, rdp.proj, rdp.combined);
  70   }
  71   // *
  72
  73   // This is special, not handled in update()
  74   if (rdp.update & UPDATE_LIGHTS)
  75   {
  76     rdp.update ^= UPDATE_LIGHTS;
  77
  78     // Calculate light vectors
  79     for (DWORD l=0; l<rdp.num_lights; l++)
  80     {
  81           InverseTransformVector(&rdp.light[l].dir_x, rdp.light_vector[l], rdp.model);
  82       NormalizeVector (rdp.light_vector[l]);
  83     }
  84   }
  85
  86   for (i=0; i < (n<<4); i+=16)
  87   {
  88     VERTEX *v = &rdp.vtx[v0 + (i>>4)];
  89     x = (float)((short*)gfx.RDRAM)[(((addr+i) >> 1) + 0)^1];
  90     y = (float)((short*)gfx.RDRAM)[(((addr+i) >> 1) + 1)^1];
  91     z = (float)((short*)gfx.RDRAM)[(((addr+i) >> 1) + 2)^1];
  92     v->flags  = ((WORD*)gfx.RDRAM)[(((addr+i) >> 1) + 3)^1];
  93     v->ou = (float)((short*)gfx.RDRAM)[(((addr+i) >> 1) + 4)^1] * rdp.tiles[rdp.cur_tile].s_scale;
  94     v->ov = (float)((short*)gfx.RDRAM)[(((addr+i) >> 1) + 5)^1] * rdp.tiles[rdp.cur_tile].t_scale;
  95     v->a    = ((BYTE*)gfx.RDRAM)[(addr+i + 15)^3];
  96
  97     v->x = x*rdp.combined[0][0] + y*rdp.combined[1][0] + z*rdp.combined[2][0] + rdp.combined[3][0];
  98     v->y = x*rdp.combined[0][1] + y*rdp.combined[1][1] + z*rdp.combined[2][1] + rdp.combined[3][1];
  99     v->z = x*rdp.combined[0][2] + y*rdp.combined[1][2] + z*rdp.combined[2][2] + rdp.combined[3][2];
 100     v->w = x*rdp.combined[0][3] + y*rdp.combined[1][3] + z*rdp.combined[2][3] + rdp.combined[3][3];
 101
 102     v->oow = 1.0f / v->w;
 103     v->x_w = v->x * v->oow;
 104     v->y_w = v->y * v->oow;
 105     v->z_w = v->z * v->oow;
 106         CalculateFog (v);
 107
 108     v->uv_calculated = 0xFFFFFFFF;
 109     v->screen_translated = 0;
 110         v->shade_mods_allowed = 1;
 111
 112     v->scr_off = 0;
 113     if (v->x < -v->w) v->scr_off |= 1;
 114     if (v->x > v->w) v->scr_off |= 2;
 115     if (v->y < -v->w) v->scr_off |= 4;
 116     if (v->y > v->w) v->scr_off |= 8;
 117     if (v->w < 0.1f) v->scr_off |= 16;
 118
 119     if (rdp.geom_mode & 0x00020000)
 120     {
 121       v->vec[0] = ((char*)gfx.RDRAM)[(addr+i + 12)^3];
 122       v->vec[1] = ((char*)gfx.RDRAM)[(addr+i + 13)^3];
 123       v->vec[2] = ((char*)gfx.RDRAM)[(addr+i + 14)^3];
 124
 125       if (rdp.geom_mode & 0x80000)
 126         calc_linear (v);
 127       else if (rdp.geom_mode & 0x40000)
 128         calc_sphere (v);
 129
 130       NormalizeVector (v->vec);
 131       calc_light (v);
 132     }
 133     else
 134     {
 135       v->r = ((BYTE*)gfx.RDRAM)[(addr+i + 12)^3];
 136       v->g = ((BYTE*)gfx.RDRAM)[(addr+i + 13)^3];
 137       v->b = ((BYTE*)gfx.RDRAM)[(addr+i + 14)^3];
 138     }
 139   }
 140 }
 141
 142 //
 143 // tri1 - renders a triangle
 144 //
 145
 146 static void uc3_tri1()
 147 {
 148   FRDP("uc3:tri1 #%d - %d, %d, %d - %08lx - %08lx\n", rdp.tri_n,
 149     ((rdp.cmd1 >> 16) & 0xFF)/5,
 150     ((rdp.cmd1 >> 8) & 0xFF)/5,
 151     ((rdp.cmd1     ) & 0xFF)/5, rdp.cmd0, rdp.cmd1);
 152
 153   VERTEX *v[3] = {
 154     &rdp.vtx[((rdp.cmd1 >> 16) & 0xFF)/5],
 155     &rdp.vtx[((rdp.cmd1 >> 8) & 0xFF)/5],
 156     &rdp.vtx[(rdp.cmd1 & 0xFF)/5]
 157   };
 158
 159   if (cull_tri(v))
 160     rdp.tri_n ++;
 161   else
 162   {
 163     update ();
 164
 165     DrawTri (v);
 166     rdp.tri_n ++;
 167   }
 168 }
 169
 170 static void uc3_tri2 ()
 171 {
 172   FRDP("uc3:tri2 #%d, #%d - %d, %d, %d - %d, %d, %d\n", rdp.tri_n, rdp.tri_n+1,
 173     ((rdp.cmd0 >> 16) & 0xFF)/5,
 174     ((rdp.cmd0 >>  8) & 0xFF)/5,
 175     ((rdp.cmd0      ) & 0xFF)/5,
 176     ((rdp.cmd1 >> 16) & 0xFF)/5,
 177     ((rdp.cmd1 >>  8) & 0xFF)/5,
 178     ((rdp.cmd1      ) & 0xFF)/5);
 179
 180   VERTEX *v[6] = {
 181     &rdp.vtx[((rdp.cmd0 >> 16) & 0xFF)/5],
 182     &rdp.vtx[((rdp.cmd0 >> 8) & 0xFF)/5],
 183     &rdp.vtx[(rdp.cmd0 & 0xFF)/5],
 184     &rdp.vtx[((rdp.cmd1 >> 16) & 0xFF)/5],
 185     &rdp.vtx[((rdp.cmd1 >> 8) & 0xFF)/5],
 186     &rdp.vtx[(rdp.cmd1 & 0xFF)/5]
 187   };
 188
 189   BOOL updated = 0;
 190
 191   if (cull_tri(v))
 192     rdp.tri_n ++;
 193   else
 194   {
 195     updated = 1;
 196     update ();
 197
 198     DrawTri (v);
 199     rdp.tri_n ++;
 200   }
 201
 202   if (cull_tri(v+3))
 203     rdp.tri_n ++;
 204   else
 205   {
 206     if (!updated)
 207       update ();
 208
 209     DrawTri (v+3);
 210     rdp.tri_n ++;
 211   }
 212 }
 213
 214 static void uc3_quad3d()
 215 {
 216   FRDP("uc3:quad3d #%d, #%d\n", rdp.tri_n, rdp.tri_n+1);
 217
 218   VERTEX *v[7] = {
 219     &rdp.vtx[((rdp.cmd1 >> 24) & 0xFF)/5],
 220     &rdp.vtx[((rdp.cmd1 >> 16) & 0xFF)/5],
 221     &rdp.vtx[((rdp.cmd1 >> 8) & 0xFF)/5],
 222     &rdp.vtx[(rdp.cmd1 & 0xFF)/5],
 223     &rdp.vtx[((rdp.cmd1 >> 24) & 0xFF)/5],
 224     &rdp.vtx[((rdp.cmd1 >> 8) & 0xFF)/5],
 225     &rdp.vtx[((rdp.cmd1 >> 24) & 0xFF)/5]
 226   };
 227
 228   BOOL updated = 0;
 229
 230   if (cull_tri(v))
 231     rdp.tri_n ++;
 232   else
 233   {
 234     updated = 1;
 235     update ();
 236
 237     DrawTri (v);
 238     rdp.tri_n ++;
 239   }
 240
 241   if (cull_tri(v+3))
 242     rdp.tri_n ++;
 243   else
 244   {
 245     if (!updated)
 246       update ();
 247
 248     DrawTri (v+3);
 249     rdp.tri_n ++;
 250   }
 251 }