112 lines
2.3 KiB
Kotlin
112 lines
2.3 KiB
Kotlin
package ru.dbotthepony.kstarbound.world
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import ru.dbotthepony.kstarbound.math.roundByAbsoluteValue
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import ru.dbotthepony.kstarbound.world.CHUNK_SIZE_BITS
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import ru.dbotthepony.kvector.api.IStruct2d
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import ru.dbotthepony.kvector.api.IStruct2i
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import ru.dbotthepony.kvector.vector.Vector2i
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private fun circulate(value: Int, bounds: Int): Int {
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require(bounds > 0) { "Bounds must be positive ($bounds given)" }
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if (value >= bounds) {
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return value % bounds
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} else if (value < 0) {
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return bounds + value % bounds
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}
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return value
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}
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/**
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* Сетка чанков идёт как и сетка тайлов.
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*
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* * Вправо у нас положительный X
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* * Влево у нас отрицательный X
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* * Вверх у нас положительный Y
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* * Вниз у нас отрицательный Y
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*/
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data class ChunkPos(val x: Int, val y: Int) : IStruct2i, Comparable<ChunkPos> {
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constructor(pos: IStruct2i) : this(pos.component1(), pos.component2())
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val tileX = x shl CHUNK_SIZE_BITS
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val tileY = y shl CHUNK_SIZE_BITS
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val tile = Vector2i(tileX, tileY)
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val top: ChunkPos get() {
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return ChunkPos(x, y + 1)
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}
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val bottom: ChunkPos get() {
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return ChunkPos(x, y - 1)
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}
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val left: ChunkPos get() {
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return ChunkPos(x - 1, y)
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}
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val topLeft: ChunkPos get() {
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return ChunkPos(x - 1, y + 1)
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}
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val topRight: ChunkPos get() {
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return ChunkPos(x + 1, y + 1)
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}
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val bottomLeft: ChunkPos get() {
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return ChunkPos(x - 1, y - 1)
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}
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val bottomRight: ChunkPos get() {
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return ChunkPos(x + 1, y - 1)
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}
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val right: ChunkPos get() {
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return ChunkPos(x + 1, y)
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}
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override fun equals(other: Any?): Boolean {
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if (other is ChunkPos)
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return other.x == x && other.y == y
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return false
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}
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override fun hashCode(): Int {
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return (y shl 16) xor x
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}
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override fun toString(): String {
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return "ChunkPos[$x $y]"
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}
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override fun compareTo(other: ChunkPos): Int {
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if (x > other.x) {
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return 1
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} else if (x < other.x) {
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return -1
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}
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return y.compareTo(other.y)
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}
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fun circular(xWrap: Int): ChunkPos {
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val x = circulate(x, xWrap)
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if (x == this.x) {
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return this
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}
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return ChunkPos(x, y)
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}
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fun toLong(): Long {
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return toLong(x, y)
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}
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companion object {
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fun toLong(x: Int, y: Int): Long {
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return x.toLong() or (y.toLong() shl 32)
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}
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}
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} |