aoc2024/day-06/internal/two/point.go

package two

import "fmt"

type point struct {
	x         int
	y         int
	direction int
}

func (p *point) String() string {
	return fmt.Sprintf("X: %d Y:%d Direction: %s", p.x, p.y, []string{"N", "E", "S", "W", "Obs"}[p.direction])
}

func (p *point) recalibrate() {
	switch p.direction {
	case N:
		p.y++
	case E:
		p.x--
	case S:
		p.y--
	case W:
		p.x++
	}

	if p.direction == W {
		p.direction = 0
	} else {
		p.direction++
	}
}

func nextPoint(current point) point {
	switch current.direction {
	case N:
		return point{current.x, current.y - 1, current.direction}
	case E:
		return point{current.x + 1, current.y, current.direction}
	case S:
		return point{current.x, current.y + 1, current.direction}
	case W:
		return point{current.x - 1, current.y, current.direction}
	default:
		return point{}
	}
}