2 * Copyright (C) <2003> iOS-Software
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
26 #include "mathtools.h"
41 * projete le vertex 3D sur le plan d'affichage
42 * retourne (0,0) si le point ne doit pas etre affiche.
44 * bonne valeur pour distance : 256
46 #define V3D_TO_V2D(v3,v2,width,height,distance) \
50 F2I((distance * v3.x / v3.z),Xp) ; \
51 F2I((distance * v3.y / v3.z),Yp) ; \
52 v2.x = Xp + (width>>1); \
53 v2.y = -Yp + (height>>1); \
55 else v2.x=v2.y=-666; \
58 void v3d_to_v2d(v3d *src, int nbvertex, int width, int height, float distance, v2d *v2_array);
61 * rotation selon Y du v3d vi d'angle a (cosa=cos(a), sina=sin(a))
62 * centerz = centre de rotation en z
64 #define Y_ROTATE_V3D(vi,vf,sina,cosa)\
66 vf.x = vi.x * cosa - vi.z * sina;\
67 vf.z = vi.x * sina + vi.z * cosa;\
74 #define TRANSLATE_V3D(vsrc,vdest)\
81 #define MUL_V3D(lf,v) {v.x*=lf;v.y*=lf;v.z*=lf;}