dlls/d3drm/math.c

   1 /*
   2  * Copyright 2007 David Adam
   3  * Copyright 2007 Vijay Kiran Kamuju
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library 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 GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  18  */
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <stdarg.h>
  23 #include <assert.h>
  24 #include <math.h>
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "wingdi.h"
  29 #include "d3drmdef.h"
  30
  31 #include "wine/debug.h"
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(d3drm);
  34
  35 /* Add Two Vectors */
  36 LPD3DVECTOR WINAPI D3DRMVectorAdd(LPD3DVECTOR d, LPD3DVECTOR s1, LPD3DVECTOR s2)
  37 {
  38     d->x=s1->x + s2->x;
  39     d->y=s1->y + s2->y;
  40     d->z=s1->z + s2->z;
  41     return d;
  42 }
  43
  44 /* Subtract Two Vectors */
  45 LPD3DVECTOR WINAPI D3DRMVectorSubtract(LPD3DVECTOR d, LPD3DVECTOR s1, LPD3DVECTOR s2)
  46 {
  47     d->x=s1->x - s2->x;
  48     d->y=s1->y - s2->y;
  49     d->z=s1->z - s2->z;
  50     return d;
  51 }
  52
  53 /* Cross Product of Two Vectors */
  54 LPD3DVECTOR WINAPI D3DRMVectorCrossProduct(LPD3DVECTOR d, LPD3DVECTOR s1, LPD3DVECTOR s2)
  55 {
  56     d->x=s1->y * s2->z - s1->z * s2->y;
  57     d->y=s1->z * s2->x - s1->x * s2->z;
  58     d->z=s1->x * s2->y - s1->y * s2->x;
  59     return d;
  60 }
  61
  62 /* Dot Product of Two vectors */
  63 D3DVALUE WINAPI D3DRMVectorDotProduct(LPD3DVECTOR s1, LPD3DVECTOR s2)
  64 {
  65     D3DVALUE dot_product;
  66     dot_product=s1->x * s2->x + s1->y * s2->y + s1->z * s2->z;
  67     return dot_product;
  68 }