void speed_switching(void)
{
shutter0.w = shutter1.w;
count_x = count_x0;
count_y = count_y0;
sign_count_x3=sign_of(count_x3);
sign_count_x2=sign_of(count_x2);
sign_count_x1=sign_of(count_x1);
sign_count_y3=sign_of(count_y3);
sign_count_y2=sign_of(count_y2);
sign_count_y1=sign_of(count_y1);
count_x3 = count_x2;
count_y3 = count_y2;
count_x2 = count_x1;
count_y2 = count_y1;
count_x1 = (signed char) delta_x;
count_y1 = (signed char) delta_y;
}
/*
* Cette fonction update la position du joueur en fonction de
* Sa vitesse et des différents obstacles sur la map
*/
void update_a_modifs(double *sens_x, double *sens_y, double v_x, double v_y, double *x_modif, double *y_modif, double * range)
{
*sens_x = sign_of(v_x);
*sens_y = sign_of(v_y);
if ( (fabs(v_x)<0.01) /* (x2 == x1) */
&& (fabs(v_y)>0.01) ) /* (y2 != y1) */
{
if (fabs(v_y)>1)
{
*x_modif = 0;
*y_modif = *sens_y;
*range = fabs(v_y);
}
else
{
*x_modif = 0;
*y_modif = v_y;
*range = 1;
}
}
else if ( (fabs(v_x)>0.01) /* (x2 != x1) */
&& (fabs(v_y)<0.01) ) /* (y2 == y1) */
{
if (fabs(v_x)>1)
{
*x_modif = *sens_x;
*y_modif = 0;
*range = fabs(v_x);
}
else
{
*x_modif = v_x;
*y_modif = 0;
*range = 1;
}
}
else /* (x2 != x1) */
{ /* (y2 != y1) */
if (fabs(v_y) > fabs(v_x))
{
if (fabs(v_y) > 1)
{
*x_modif = *sens_x *fabs(v_x/v_y);
*y_modif = *sens_y;
*range = fabs(v_y);
}
else
{
*x_modif = v_x;
*y_modif = v_y;
*range = 1;
}
}
else
{
if (fabs(v_x) > 1)
{
*x_modif = *sens_x;
*y_modif = *sens_y * fabs(v_y/v_x);
*range = fabs(v_x);
}
else
{
*x_modif = v_x;
*y_modif = v_y;
*range = 1;
}
}
}
}