aoc2023/day-18/imager.go

package main

type coords struct {
	X int
	Y int
}

func newCoords(x, y int) coords {
	return coords{X: x, Y: y}
}

type imager struct {
	point coords
	space []coords
}

// newImager returns an imager type
func newImager() *imager {
	return &imager{point: newCoords(0, 0), space: make([]coords, 0)}
}

// add appends new coordinates to all points that describe the polygon
func (i *imager) add(direction string, count int) {
	for j := 0; j < count; j++ {
		switch direction {
		case "U":
			i.point.Y--
		case "D":
			i.point.Y++
		case "L":
			i.point.X--
		case "R":
			i.point.X++
		}
		i.space = append(i.space, newCoords(i.point.X, i.point.Y))
	}
}