3dmath.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 __inline float DotProduct(register float *v1, register float *v2)
  37 {
  38         register float result;
  39         result = v1[0]*v2[0] + v1[1]*v2[1] + v1[2]*v2[2];
  40         return(result);
  41 }
  42
  43 __inline void NormalizeVector(float *v)
  44 {
  45         register float len;
  46         len = sqrtf(v[0]*v[0] + v[1]*v[1] + v[2]*v[2]);
  47         if (len > 0.0f)
  48         {
  49                 v[0] /= len;
  50                 v[1] /= len;
  51                 v[2] /= len;
  52         }
  53 }
  54
  55 __inline void InverseTransformVector (float *src, float *dst, float mat[4][4])
  56 {
  57         dst[0] = mat[0][0]*src[0] + mat[0][1]*src[1] + mat[0][2]*src[2];
  58         dst[1] = mat[1][0]*src[0] + mat[1][1]*src[1] + mat[1][2]*src[2];
  59         dst[2] = mat[2][0]*src[0] + mat[2][1]*src[1] + mat[2][2]*src[2];
  60 }
  61
  62 void calc_light (VERTEX *v);
  63 void calc_linear (VERTEX *v);
  64 void calc_sphere (VERTEX *v);
  65
  66 void math_init();
  67
  68 typedef void (__stdcall *MULMATRIX)(float m1[4][4],float m2[4][4],float r[4][4]);
  69 extern MULMATRIX MulMatrices;