core/src/ru/deadsoftware/cavedroid/misc/utils/RenderingUtils.kt

   1 package ru.deadsoftware.cavedroid.misc.utils
   2
   3 import com.badlogic.gdx.math.Rectangle
   4
   5 private fun Rectangle.shifted(shift: Float) = Rectangle(x + shift, y, width, height)
   6
   7 private fun Rectangle.getLazyShifts(worldWidthPx: Float)
   8     = Triple(
   9         first = lazy { shifted(0f) },
  10         second = lazy { shifted(-worldWidthPx) },
  11         third = lazy { shifted(worldWidthPx) }
  12     )
  13
  14 fun Rectangle.cycledInsideWorld(
  15     viewport: Rectangle,
  16     worldWidthPx: Float,
  17 ): Rectangle? {
  18     val (notShifted, shiftedLeft, shiftedRight) = getLazyShifts(worldWidthPx)
  19
  20     return when {
  21         viewport.overlaps(notShifted.value) -> notShifted.value
  22         viewport.overlaps(shiftedLeft.value) -> shiftedLeft.value
  23         viewport.overlaps(shiftedRight.value) -> shiftedRight.value
  24         else -> null
  25     }
  26 }
  27
  28 fun forEachBlockInArea(
  29     area: Rectangle,
  30     func: (x: Int, y: Int) -> Unit
  31 ) {
  32     val startMapX = area.x.bl
  33     val endMapX = startMapX + area.width.bl + 1
  34     val startMapY = area.y.bl
  35     val endMapY = startMapY + area.height.bl + 1
  36
  37     for (x in startMapX..endMapX) {
  38         for (y in startMapY..endMapY) {
  39             func(x, y)
  40         }
  41     }
  42 }