first Kotlin version

src/main/kotlin/mods/betterfoliage/client/render/RenderMycelium.kt

@@ -0,0 +1,48 @@
+package mods.betterfoliage.client.render
+
+import mods.betterfoliage.BetterFoliageMod
+import mods.betterfoliage.client.Client
+import mods.betterfoliage.client.config.Config
+import mods.octarinecore.client.render.*
+import net.minecraft.block.material.Material
+import net.minecraft.client.renderer.RenderBlocks
+import net.minecraft.init.Blocks
+import org.apache.logging.log4j.Level.INFO
+
+class RenderMycelium : AbstractBlockRenderingHandler(BetterFoliageMod.MOD_ID) {
+
+    val myceliumIcon = iconSet(BetterFoliageMod.LEGACY_DOMAIN, "better_mycel_%d")
+    val myceliumModel = modelSet(64, RenderGrass.grassTopQuads)
+
+    override fun afterStitch() {
+        Client.log(INFO, "Registered ${myceliumIcon.num} mycelium textures")
+    }
+
+    override fun isEligible(ctx: BlockContext): Boolean {
+        if (!Config.enabled || !Config.shortGrass.myceliumEnabled) return false
+        return ctx.block == Blocks.mycelium &&
+        ctx.cameraDistance < Config.shortGrass.distance
+    }
+
+    override fun render(ctx: BlockContext, parent: RenderBlocks): Boolean {
+        val isSnowed = ctx.block(up1).material.let {
+            it == Material.snow || it == Material.craftedSnow
+        }
+
+        if (renderWorldBlockBase(parent, face = alwaysRender)) return true
+        if (isSnowed && !Config.shortGrass.snowEnabled) return true
+        if (ctx.block(up1).isOpaqueCube) return true
+
+        val rand = ctx.semiRandomArray(2)
+        modelRenderer.render(
+            myceliumModel[rand[0]],
+            Rotation.identity,
+            ctx.blockCenter + (if (isSnowed) snowOffset else Double3.zero),
+            icon = { ctx, qi, q -> myceliumIcon[rand[qi and 1]]!! },
+            rotateUV = { 0 },
+            postProcess = if (isSnowed) whitewash else noPost
+        )
+
+        return true
+    }
+}