diff options
Diffstat (limited to 'gst/goom/v3d.h')
-rw-r--r-- | gst/goom/v3d.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/gst/goom/v3d.h b/gst/goom/v3d.h new file mode 100644 index 00000000..7690847f --- /dev/null +++ b/gst/goom/v3d.h @@ -0,0 +1,65 @@ +#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 |