aoc2023/day-10/check.go

package main

/*
	functions that check connections between pipes in each direction
*/

func checkSouth(point point) point {
	if point.Y == len(pointsArray)-1 {
		return point
	}

	target := pointsArray[point.Y+1].points[point.X]
	if point.S && target.N {
		return target
	}
	return point
}

func checkEast(point point) point {
	if point.X == len(pointsArray[point.Y].points)-1 {
		return point
	}

	target := pointsArray[point.Y].points[point.X+1]
	if point.E && target.W {
		return target
	}
	return point
}

func checkNorth(point point) point {
	if point.Y == 0 {
		return point
	}

	target := pointsArray[point.Y-1].points[point.X]
	if point.N && target.S {
		return target
	}
	return point
}

func checkWest(point point) point {
	if point.X == 0 {
		return point
	}

	target := pointsArray[point.Y].points[point.X-1]
	if point.W && target.E {
		return target
	}
	return point
}