gistfile1.c

#include <stdio.h>
#include <stdlib.h>

int collide(int data[25], int collision_mapping[3]) {
    int collision = 0;
    int i0 = 0;
    for (i0 = 0; i0 < 25; i0++ )
    {
        collision += collision_mapping[data[i0]];
    }
    return collision != 0;
}

int main()
{
    int collision_mapping[3] = {0,0,1}; /* only collide against data value 2 */
    int data0[25] = {
        0, 1, 1, 1, 0,
        1, 1, 1, 1, 1,
        1, 1, 1, 1, 1,
        1, 1, 1, 1, 1,
        0, 1, 1, 1, 0
    };
    int data1[25] = {
        0, 2, 2, 2, 0,
        2, 2, 2, 2, 2,
        2, 2, 2, 2, 2,
        2, 2, 2, 2, 2,
        0, 2, 2, 2, 0
    };
    int data2[25] = {
        0, 1, 1, 1, 0,
        1, 1, 1, 1, 1,
        1, 1, 2, 1, 1,
        1, 1, 1, 1, 1,
        0, 1, 1, 1, 0
    };
    int collision;
    printf("%i\n", collide(data0, collision_mapping));
    printf("%i\n", collide(data1, collision_mapping));
    printf("%i\n", collide(data2, collision_mapping));
    return 0;
}