2 * Mesh operations specific to D3DX9.
4 * Copyright (C) 2009 David Adam
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library 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 GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
24 #include "wine/debug.h"
27 WINE_DEFAULT_DEBUG_CHANNEL(d3dx);
29 /*************************************************************************
32 BOOL WINAPI D3DXIntersectTri(CONST D3DXVECTOR3 *p0, CONST D3DXVECTOR3 *p1, CONST D3DXVECTOR3 *p2, CONST D3DXVECTOR3 *praypos, CONST D3DXVECTOR3 *praydir, FLOAT *pu, FLOAT *pv, FLOAT *pdist)
37 m.m[0][0] = p1->x - p0->x;
38 m.m[1][0] = p2->x - p0->x;
39 m.m[2][0] = -praydir->x;
41 m.m[0][1] = p1->y - p0->z;
42 m.m[1][1] = p2->y - p0->z;
43 m.m[2][1] = -praydir->y;
45 m.m[0][2] = p1->z - p0->z;
46 m.m[1][2] = p2->z - p0->z;
47 m.m[2][2] = -praydir->z;
54 vec.x = praypos->x - p0->x;
55 vec.y = praypos->y - p0->y;
56 vec.z = praypos->z - p0->z;
59 if ( D3DXMatrixInverse(&m, NULL, &m) )
61 D3DXVec4Transform(&vec, &vec, &m);
62 if ( (vec.x >= 0.0f) && (vec.y >= 0.0f) && (vec.x + vec.y <= 1.0f) && (vec.z >= 0.0f) )
66 *pdist = fabs( vec.z );