first Kotlin version

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

@@ -0,0 +1,49 @@
+package mods.betterfoliage.client.render
+
+import mods.betterfoliage.BetterFoliageMod
+import mods.betterfoliage.client.Client
+import mods.betterfoliage.client.config.Config
+import mods.betterfoliage.client.integration.ShadersModIntegration
+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 RenderAlgae : AbstractBlockRenderingHandler(BetterFoliageMod.MOD_ID) {
+
+    val noise = simplexNoise()
+
+    val algaeIcons = iconSet(BetterFoliageMod.LEGACY_DOMAIN, "better_algae_%d")
+    val algaeModels = modelSet(64, RenderGrass.grassTopQuads)
+
+    override fun afterStitch() {
+        Client.log(INFO, "Registered ${algaeIcons.num} algae textures")
+    }
+
+    override fun isEligible(ctx: BlockContext) =
+        Config.enabled && Config.algae.enabled &&
+        ctx.cameraDistance < Config.algae.distance &&
+        ctx.block(up2).material == Material.water &&
+        ctx.block(up1).material == Material.water &&
+        Config.blocks.dirt.matchesID(ctx.block) &&
+        ctx.biomeId in Config.algae.biomes &&
+        noise[ctx.x, ctx.z] < Config.algae.population
+
+    override fun render(ctx: BlockContext, parent: RenderBlocks): Boolean {
+        if (renderWorldBlockBase(parent, face = alwaysRender)) return true
+
+        val rand = ctx.semiRandomArray(3)
+
+        ShadersModIntegration.grass(Config.algae.shaderWind) {
+            modelRenderer.render(
+                algaeModels[rand[2]],
+                Rotation.identity,
+                icon = { ctx, qi, q -> algaeIcons[rand[qi and 1]]!! },
+                rotateUV = { 0 },
+                postProcess = noPost
+            )
+        }
+        return true
+    }
+}