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/* Goom Project
* Copyright (C) <2003> iOS-Software
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef _V3D_H
#define _V3D_H
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include "mathtools.h"
typedef struct {
float x,y,z;
} v3d;
typedef struct {
int x,y;
} v2d;
typedef struct {
double x,y;
} v2g;
/*
* projete le vertex 3D sur le plan d'affichage
* retourne (0,0) si le point ne doit pas etre affiche.
*
* bonne valeur pour distance : 256
*/
#define V3D_TO_V2D(v3,v2,width,height,distance) \
{ \
int Xp, Yp; \
if (v3.z > 2) { \
F2I((distance * v3.x / v3.z),Xp) ; \
F2I((distance * v3.y / v3.z),Yp) ; \
v2.x = Xp + (width>>1); \
v2.y = -Yp + (height>>1); \
} \
else v2.x=v2.y=-666; \
}
void v3d_to_v2d(v3d *src, int nbvertex, int width, int height, float distance, v2d *v2_array);
/*
* rotation selon Y du v3d vi d'angle a (cosa=cos(a), sina=sin(a))
* centerz = centre de rotation en z
*/
#define Y_ROTATE_V3D(vi,vf,sina,cosa)\
{\
vf.x = vi.x * cosa - vi.z * sina;\
vf.z = vi.x * sina + vi.z * cosa;\
vf.y = vi.y;\
}
/*
* translation
*/
#define TRANSLATE_V3D(vsrc,vdest)\
{\
vdest.x += vsrc.x;\
vdest.y += vsrc.y;\
vdest.z += vsrc.z;\
}
#define MUL_V3D(lf,v) {v.x*=lf;v.y*=lf;v.z*=lf;}
#endif
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