core/src/ru/deadsoftware/cavedroid/game/input/Joystick.kt

   1 package ru.deadsoftware.cavedroid.game.input
   2
   3 import com.badlogic.gdx.math.Vector2
   4 import com.badlogic.gdx.utils.TimeUtils
   5
   6 class Joystick(
   7     private val value: Float,
   8 ) {
   9
  10     var active = false
  11         private set
  12     var centerX = 0f
  13         private set
  14     var centerY = 0f
  15         private set
  16
  17     var activeX = 0f
  18         private set
  19     var activeY = 0f
  20         private set
  21
  22     var pointer = 0
  23         private set
  24
  25     private val stickVector = Vector2()
  26
  27     private var activateTimeMs = 0L
  28
  29     fun activate(touchX: Float, touchY: Float, pointer: Int) {
  30         active = true
  31         centerX = touchX
  32         centerY = touchY
  33         activateTimeMs = TimeUtils.millis()
  34         this.pointer = pointer
  35     }
  36
  37     fun deactivate() {
  38         active = false
  39     }
  40
  41     fun getVelocityVector(): Vector2 {
  42         if (!active) {
  43             return Vector2.Zero
  44         }
  45         println(stickVector)
  46         return Vector2(
  47             stickVector.x * value,
  48             stickVector.y * value
  49         )
  50     }
  51
  52     fun updateState(touchX: Float, touchY: Float) {
  53         if (!active) {
  54             return
  55         }
  56
  57         stickVector.x = touchX - centerX
  58         stickVector.y = touchY - centerY
  59         stickVector.clamp(0f, RADIUS)
  60
  61         activeX = centerX + stickVector.x
  62         activeY = centerY + stickVector.y
  63
  64         stickVector.x /= RADIUS
  65         stickVector.y /= RADIUS
  66     }
  67
  68     companion object {
  69         const val RADIUS = 24f
  70         const val SIZE = RADIUS * 2
  71         const val STICK_SIZE = 16f
  72     }
  73
  74 }