[WIP] algae, reeds, mycelium, coral working

+ lots of cleanup, reorganizing

src/main/kotlin/mods/betterfoliage/model/SpriteSets.kt

@@ -0,0 +1,83 @@
+package mods.betterfoliage.model
+
+import mods.betterfoliage.BetterFoliageMod
+import mods.betterfoliage.util.Atlas
+import mods.betterfoliage.util.resourceManager
+import net.minecraft.client.renderer.texture.MissingTextureSprite
+import net.minecraft.client.renderer.texture.TextureAtlasSprite
+import net.minecraft.util.ResourceLocation
+import net.minecraftforge.client.event.TextureStitchEvent
+import net.minecraftforge.eventbus.api.SubscribeEvent
+import kotlin.properties.ReadOnlyProperty
+import kotlin.reflect.KProperty
+
+interface SpriteSet {
+    val num: Int
+    operator fun get(idx: Int): TextureAtlasSprite
+}
+
+class FixedSpriteSet(val sprites: List<TextureAtlasSprite>) : SpriteSet {
+    override val num = sprites.size
+    override fun get(idx: Int) = sprites[idx % num]
+}
+
+class SpriteDelegate(val atlas: Atlas, val idFunc: () -> ResourceLocation) : ReadOnlyProperty<Any, TextureAtlasSprite> {
+    private lateinit var id: ResourceLocation
+    private var value: TextureAtlasSprite? = null
+
+    init {
+        BetterFoliageMod.bus.register(this)
+    }
+
+    @SubscribeEvent
+    fun handlePreStitch(event: TextureStitchEvent.Pre) {
+        id = idFunc(); value = null
+        event.addSprite(id)
+    }
+
+    override fun getValue(thisRef: Any, property: KProperty<*>): TextureAtlasSprite {
+        value?.let { return it }
+        synchronized(this) {
+            value?.let { return it }
+            atlas[id].let { value = it; return it }
+        }
+    }
+
+}
+
+class SpriteSetDelegate(
+    val atlas: Atlas,
+    val idRegister: (ResourceLocation) -> ResourceLocation = { it },
+    val idFunc: (Int) -> ResourceLocation
+) : ReadOnlyProperty<Any, SpriteSet> {
+    private var idList: List<ResourceLocation> = emptyList()
+    private var spriteSet: SpriteSet? = null
+
+    init {
+        BetterFoliageMod.bus.register(this)
+    }
+
+    @SubscribeEvent
+    fun handlePreStitch(event: TextureStitchEvent.Pre) {
+        if (event.map.textureLocation != Atlas.BLOCKS.resourceId) return
+        spriteSet = null
+        idList = (0 until 16)
+            .map(idFunc)
+            .filter { resourceManager.hasResource(atlas.file(it)) }
+            .map(idRegister)
+        idList.forEach { event.addSprite(it) }
+    }
+
+    override fun getValue(thisRef: Any, property: KProperty<*>): SpriteSet {
+        spriteSet?.let { return it }
+        synchronized(this) {
+            spriteSet?.let { return it }
+            spriteSet = FixedSpriteSet(
+                idList
+                    .ifEmpty { listOf(MissingTextureSprite.getLocation()) }
+                    .map { atlas[it] }
+            )
+            return spriteSet!!
+        }
+    }
+}