core/src/ru/deadsoftware/cavedroid/game/objects/Drop.kt

   1 package ru.deadsoftware.cavedroid.game.objects
   2
   3 import com.badlogic.gdx.math.Intersector
   4 import com.badlogic.gdx.math.Rectangle
   5 import com.badlogic.gdx.math.Vector2
   6 import ru.deadsoftware.cavedroid.game.GameItemsHolder
   7 import ru.deadsoftware.cavedroid.game.model.item.Item
   8
   9 class Drop @JvmOverloads constructor(
  10     x: Float,
  11     y: Float,
  12     _item: Item,
  13     val amount: Int = 1,
  14 ) : Rectangle(x, y, DROP_SIZE, DROP_SIZE) {
  15
  16     val itemKey = _item.params.key
  17     val velocity = getInitialVelocity()
  18     var pickedUp = false
  19
  20     @Transient
  21     lateinit var item: Item
  22         private set
  23
  24     init {
  25         item = _item
  26     }
  27
  28     fun initItem(gameItemsHolder: GameItemsHolder) {
  29         if (this::item.isInitialized) {
  30             return
  31         }
  32
  33         item = gameItemsHolder.getItem(itemKey)
  34     }
  35
  36     fun canMagnetTo(rectangle: Rectangle): Boolean {
  37         val magnetArea = getMagnetArea()
  38         return Intersector.overlaps(magnetArea, rectangle)
  39     }
  40
  41     private fun getMagnetArea(): Rectangle {
  42         return Rectangle(
  43             /* x = */ x - MAGNET_DISTANCE,
  44             /* y = */ y - MAGNET_DISTANCE,
  45             /* width = */ width + MAGNET_DISTANCE * 2,
  46             /* height = */ height + MAGNET_DISTANCE * 2,
  47         )
  48     }
  49
  50     companion object {
  51         private const val MAGNET_DISTANCE = 8f
  52
  53         const val MAGNET_VELOCITY = 256f
  54         const val DROP_SIZE = 8f
  55
  56         private fun getInitialVelocity(): Vector2 = Vector2(0f, -1f)
  57     }
  58 }