broadcast.c

typedef enum tile {
	none = 0,
	forward = 1,
	right = 7,
	backward = 5,
	left = 3
} tile;

typedef enum dir {
	dirtop = 1,
	dirright = 2,
	dirdown = 3,
	dirleft = 4
} dir;

static int getBroadcastTile(player_t *emitter, player_t *receiver) {
	tile d;
	if (emitter->y > receiver->y)
		d = backward;
	else if (emitter->y < receiver->y)
		d = forward;
	else if (emitter->y == receiver->y) {
		if (emitter->x > receiver->x)
			d = right;
		else if (emitter->x < receiver->x)
			d = left;
		else
			d = none;
	}
	switch(d) {
		case forward:
			switch(receiver->orientation) {
				case dirtop:
					return forward;
				case dirright:
					return left;
				case dirdown:
					return backward;
				case dirleft:
					return right;
			}
			break;
		case backward:
			switch(receiver->orientation) {
				case dirtop:
					return backward;
				case dirright:
					return right;
				case dirdown:
					return forward;
				case dirleft:
					return left;
			}
			break;
		case left:
			switch(receiver->orientation) {
				case dirtop:
					return left;
				case dirright:
					return backward;
				case dirdown:
					return right;
				case dirleft:
					return forward;
			}
		case right:
			switch(receiver->orientation) {
				case dirtop:
					return right;
				case dirright:
					return forward;
				case dirdown:
					return left;
				case dirleft:
					return backward;
			}
			break;
		case none:
			return none;
	}
	return none;
}