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