int snake_move(void)
{
int sx[100] = {250, 200, 150, 100, 50};
int sy[100] = {300, 300, 300, 300, 300};
int fx = 0;
int fy = 0;
int f_count = 100;
int step = 50;
int x_offset = step;
int y_offset = 0;
int s_len = 5;
char dict = 'd';
char new_dict = 0;
char flag = 0;
char eat_state = 0;
barriar();
system("stty raw -echo");
while(flag == 0)
{
show_food(&fx, &fy, sx, sy, s_len, &f_count);
if(move_one_step(sx, sy, x_offset,y_offset, s_len, eat_state) == -1)
{
restart_game(sx, sy, s_len);
dict = 'd';
new_dict = 0;
x_offset = step;
y_offset = 0;
s_len = 5;
}
eat_state = eat_food(&fx, &fy, sx, sy, &s_len,&f_count);
new_dict = get_key();
switch(new_dict)
{
case 'a' : if(dict != 'd') dict = new_dict;break;
case 'd' : if(dict != 'a') dict = new_dict;break;
case 'w' : if(dict != 's') dict = new_dict;break;
case 's' : if(dict != 'w') dict = new_dict;break;
case 'q' : dict = new_dict;
default : break;
}
switch(dict)
{
case 'a' : x_offset=-step; y_offset=0;break;
case 'd' : x_offset=step; y_offset=0;break;
case 'w' : x_offset=0; y_offset=-step;break;
case 's' : x_offset=0; y_offset=step;break;
case 'q' : flag = 1;break;
default : break;
}
usleep(1000);
}
system("stty cooked echo");
return 0;
}
int ray(int N_r_cells, int N_theta_cells,
float radius_min, float radius_max,
float angle_min, float angle_max,
int Num_rays, float *density_map,
float *r_final, float *theta_final){
/* assign global variables */
N_r = N_r_cells;
N_theta = N_theta_cells;
N_ray = Num_rays;
r_min = radius_min;
r_max = radius_max;
theta_min = angle_min;
theta_max = angle_max;
dr = (r_max - r_min) / N_r;
dtheta = (theta_max - theta_min) / N_theta;
density = density_map;
srand(time(NULL));
int i,j;
/* allocate memory, initialize the ray */
allocate_ray();
initialize_ray();
/* start the mail loop */
for (i=0; i<N_ray; i++) {
if ( !(i % 10000) ) {
printf("...ray=%d...\n",i);
}
while (rays[i]->out_flag == NO) {
move_one_step(i);
}
}
/* write the final results */
for (i=0; i<N_ray; i++) {
*(r_final+i) = rays[i]->r;
*(theta_final+i) = rays[i]->theta;
}
/* free the memory */
free_ray();
return 1;
}
