core/src/ru/deadsoftware/cavedroid/game/model/block/Block.kt

   1 package ru.deadsoftware.cavedroid.game.model.block
   2
   3 import com.badlogic.gdx.graphics.g2d.Sprite
   4 import com.badlogic.gdx.graphics.g2d.SpriteBatch
   5 import com.badlogic.gdx.math.Rectangle
   6 import com.badlogic.gdx.utils.TimeUtils
   7 import kotlin.contracts.ExperimentalContracts
   8 import kotlin.contracts.contract
   9
  10 @OptIn(ExperimentalContracts::class)
  11 sealed class Block {
  12
  13     abstract val params: CommonBlockParams
  14
  15     val width: Float get() = 16f - params.collisionMargins.left - params.collisionMargins.right
  16     val height: Float get() = 16f - params.collisionMargins.top - params.collisionMargins.bottom
  17
  18     private val spriteWidth: Float get() = 16f - params.spriteMargins.left - params.spriteMargins.right
  19     private val spriteHeight: Float get() = 16f - params.spriteMargins.top - params.spriteMargins.bottom
  20
  21     private var animation: Array<Sprite>? = null
  22
  23     private var sprite: Sprite? = null
  24         get() {
  25             return animation?.get(currentAnimationFrame) ?: field
  26         }
  27
  28     private val currentAnimationFrame: Int
  29         get() {
  30             return params.animationInfo?.let { animInfo ->
  31                 ((TimeUtils.millis() / ANIMATION_FRAME_DURATION_MS) % animInfo.framesCount).toInt()
  32             } ?: 0
  33         }
  34
  35     fun initialize() {
  36         initAnimation()
  37         initSprite()
  38     }
  39
  40     private fun initAnimation() {
  41         animation = params.animationInfo?.let { animInfo ->
  42             requireNotNull(params.texture) { "Cannot derive animation frames from null sprite" }
  43             Array(animInfo.framesCount) { y ->
  44                 val width = 16 - params.spriteMargins.left - params.spriteMargins.right
  45                 val height = 16 - params.spriteMargins.top - params.spriteMargins.bottom
  46                 Sprite(params.texture, params.spriteMargins.left, 16 * y + params.spriteMargins.top, width, height)
  47                     .apply { flip(false, true) }
  48             }
  49         }
  50     }
  51
  52     private fun initSprite() {
  53         sprite = animation?.get(0) ?: params.texture?.let { tex ->
  54             val width = 16 - params.spriteMargins.left - params.spriteMargins.right
  55             val height = 16 - params.spriteMargins.top - params.spriteMargins.bottom
  56             Sprite(tex, params.spriteMargins.left, params.spriteMargins.top, width, height)
  57                 .apply { flip(false, true) }
  58         }
  59     }
  60
  61     fun requireSprite() = requireNotNull(sprite)
  62
  63     fun draw(spriter: SpriteBatch, x: Float, y: Float) {
  64         sprite?.apply {
  65             setBounds(
  66                 /* x = */ x + params.spriteMargins.left,
  67                 /* y = */ y + params.spriteMargins.top,
  68                 /* width = */ spriteWidth,
  69                 /* height = */ spriteHeight
  70             )
  71             draw(spriter)
  72         }
  73     }
  74
  75     fun isFluid(): Boolean {
  76         contract { returns(true) implies (this@Block is Fluid) }
  77         return this is Fluid
  78     }
  79
  80     fun isWater(): Boolean {
  81         contract { returns(true) implies (this@Block is Water) }
  82         return this is Water
  83     }
  84
  85     fun isLava(): Boolean {
  86         contract { returns(true) implies (this@Block is Lava) }
  87         return this is Lava
  88     }
  89
  90     fun isSlab(): Boolean {
  91         contract { returns(true) implies (this@Block is Slab) }
  92         return this is Slab
  93     }
  94
  95     fun getRectangle(x: Int, y: Int): Rectangle {
  96         return Rectangle(
  97             /* x = */ x * 16f + params.collisionMargins.left,
  98             /* y = */ y * 16f + params.collisionMargins.top,
  99             /* width = */ width,
 100             /* height = */ height
 101         )
 102     }
 103
 104
 105
 106     data class Normal(
 107         override val params: CommonBlockParams,
 108     ) : Block()
 109
 110     data class Slab(
 111         override val params: CommonBlockParams,
 112         val fullBlockKey: String,
 113     ): Block()
 114
 115     abstract class Fluid: Block() {
 116         abstract val statesCount: Int
 117     }
 118
 119     data class Water(
 120         override val params: CommonBlockParams,
 121         override val statesCount: Int
 122     ) : Fluid()
 123
 124     data class Lava(
 125         override val params: CommonBlockParams,
 126         override val statesCount: Int
 127     ) : Fluid()
 128
 129     /* Legacy accessors below */
 130
 131     // collision margins
 132     @Deprecated(LEGACY_ACCESSOR_DEPRECATION) val left: Int get() = params.collisionMargins.left
 133     @Deprecated(LEGACY_ACCESSOR_DEPRECATION) val right: Int get() = params.collisionMargins.left
 134     @Deprecated(LEGACY_ACCESSOR_DEPRECATION) val top: Int get() = params.collisionMargins.left
 135     @Deprecated(LEGACY_ACCESSOR_DEPRECATION) val bottom: Int get() = params.collisionMargins.left
 136
 137     @Deprecated(LEGACY_ACCESSOR_DEPRECATION) val hp: Int get() = params.hitPoints
 138     @Deprecated(LEGACY_ACCESSOR_DEPRECATION) val collision: Boolean get() = params.hasCollision
 139     @Deprecated(LEGACY_ACCESSOR_DEPRECATION) val animated: Boolean get() = params.animationInfo != null
 140     @Deprecated(LEGACY_ACCESSOR_DEPRECATION) val frames: Int get() = params.animationInfo?.framesCount ?: 0
 141     @Deprecated(LEGACY_ACCESSOR_DEPRECATION) val drop: String get() = params.dropInfo?.itemKey ?: "none"
 142     @Deprecated(LEGACY_ACCESSOR_DEPRECATION) fun hasDrop() = params.dropInfo != null
 143     @Deprecated(LEGACY_ACCESSOR_DEPRECATION) fun toJump() = params.hasCollision && params.collisionMargins.top < 8
 144     @Deprecated(LEGACY_ACCESSOR_DEPRECATION) fun hasCollision() = params.hasCollision
 145     @Deprecated(LEGACY_ACCESSOR_DEPRECATION) fun isBackground() = params.isBackground
 146     @Deprecated(LEGACY_ACCESSOR_DEPRECATION) fun isTransparent() = params.isTransparent
 147     @Deprecated(LEGACY_ACCESSOR_DEPRECATION) fun getTexture() = sprite
 148
 149
 150     companion object {
 151         private const val LEGACY_ACCESSOR_DEPRECATION = "legacy accessors will be removed"
 152         private const val ANIMATION_FRAME_DURATION_MS = 100L
 153     }
 154 }