1 /* Goom Project 2 * Copyright (C) <2003> iOS-Software 3 * 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. 8 * 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. 13 * 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. 18 */ 19 #ifndef _V3D_H 20 #define _V3D_H 21 22 #include <math.h> 23 #include <stdlib.h> 24 #include <stdio.h> 25 26 #include "mathtools.h" 27 28 typedef struct { 29 float x,y,z; 30 } v3d; 31 32 typedef struct { 33 int x,y; 34 } v2d; 35 36 typedef struct { 37 double x,y; 38 } v2g; 39 40 /* 41 * projete le vertex 3D sur le plan d'affichage 42 * retourne (0,0) si le point ne doit pas etre affiche. 43 * 44 * bonne valeur pour distance : 256 45 */ 46 #define V3D_TO_V2D(v3,v2,width,height,distance) \ 47 { \ 48 int Xp, Yp; \ 49 if (v3.z > 2) { \ 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); \ 54 } \ 55 else v2.x=v2.y=-666; \ 56 } 57 58 void v3d_to_v2d(v3d *src, int nbvertex, int width, int height, float distance, v2d *v2_array); 59 60 /* 61 * rotation selon Y du v3d vi d'angle a (cosa=cos(a), sina=sin(a)) 62 * centerz = centre de rotation en z 63 */ 64 #define Y_ROTATE_V3D(vi,vf,sina,cosa)\ 65 {\ 66 vf.x = vi.x * cosa - vi.z * sina;\ 67 vf.z = vi.x * sina + vi.z * cosa;\ 68 vf.y = vi.y;\ 69 } 70 71 /* 72 * translation 73 */ 74 #define TRANSLATE_V3D(vsrc,vdest)\ 75 {\ 76 vdest.x += vsrc.x;\ 77 vdest.y += vsrc.y;\ 78 vdest.z += vsrc.z;\ 79 } 80 81 #define MUL_V3D(lf,v) {v.x*=lf;v.y*=lf;v.z*=lf;} 82 83 #endif 84