void analyser(unsigned char * buffer);
void fusee(unsigned char * buffer, int new);
void super_spectral(unsigned char * buffer);
void super_spectral_balls(unsigned char * buffer);
void grille_3d(unsigned char *buffer, gint16 data[2][512],float alpha, float beta, float gamma, int persp, int dist_cam);
void l2_grilles_3d(unsigned char *buffer, gint16 data[2][512],float alpha, float beta, float gamma, int persp, int dist_cam);
void burn_3d(unsigned char *buffer, gint16 data[2][512],float alpha, float beta, float gamma, int persp, int dist_cam, int mode);
void courbes(unsigned char *buffer, gint16 data[2][512],unsigned char color, int type);
void sinus_rect(unsigned char *buffer,int k);
void stars_create_state(float pos[3][STARS_MAX], int mode);
void stars_manage(unsigned char *buffer, int new,  float alpha, float beta, float gamma, int persp, int dist_cam);