62 lines
1.2 KiB
Kotlin
62 lines
1.2 KiB
Kotlin
package aoc.thirteen
|
|
|
|
public class Train {
|
|
constructor(dir: Int, x: Int, y: Int) {
|
|
this.direction = dir
|
|
this.x = x
|
|
this.y = y
|
|
this.nextTurn = Turn.LEFT
|
|
}
|
|
|
|
var direction: Int
|
|
var nextTurn: Turn
|
|
var x: Int
|
|
var y: Int
|
|
|
|
fun makeTurn(turn: Turn) {
|
|
this.direction += turn.dir
|
|
correctDirection()
|
|
}
|
|
|
|
fun crossIntersection() {
|
|
when (this.nextTurn) {
|
|
Turn.LEFT -> {
|
|
this.direction -= this.nextTurn.dir
|
|
this.nextTurn = Turn.STRAIGHT
|
|
}
|
|
Turn.STRAIGHT -> {
|
|
this.nextTurn = Turn.RIGHT
|
|
}
|
|
Turn.RIGHT -> {
|
|
this.direction += this.nextTurn.dir
|
|
this.nextTurn = Turn.LEFT
|
|
}
|
|
}
|
|
correctDirection()
|
|
}
|
|
|
|
fun correctDirection() {
|
|
if (this.direction < 0) {
|
|
this.direction = (this.direction + 4)
|
|
} else if (this.direction > 3) {
|
|
this.direction = (this.direction + 1) % 4
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
public enum class Turn(val dir: Int) {
|
|
LEFT(-1),
|
|
STRAIGHT(0),
|
|
RIGHT(-1)
|
|
}
|
|
|
|
public enum class Field() {
|
|
VERTICAL,
|
|
HORIZONTAL,
|
|
TOP_LEFT,
|
|
TOP_RIGHT,
|
|
EMPTY,
|
|
INTERSECTION
|
|
}
|