[WIP] start 1.15 port

reorganize packages to match Fabric version
use util classes from Fabric version

src/main/kotlin/mods/betterfoliage/render/block/vanillaold/RenderLilypad.kt

@@ -0,0 +1,58 @@
+package mods.betterfoliage.render.block.vanillaold
+
+import mods.betterfoliage.BetterFoliageMod
+import mods.betterfoliage.config.BlockConfig
+import mods.betterfoliage.config.Config
+import mods.betterfoliage.integration.ShadersModIntegration
+import mods.betterfoliage.resource.Identifier
+import mods.betterfoliage.render.old.RenderDecorator
+import mods.betterfoliage.render.lighting.FlatOffsetNoColor
+import mods.betterfoliage.render.old.CombinedContext
+import mods.betterfoliage.render.toCross
+import mods.betterfoliage.render.xzDisk
+import mods.betterfoliage.util.Int3
+import net.minecraft.util.Direction.DOWN
+import net.minecraft.util.Direction.UP
+
+class RenderLilypad : RenderDecorator(BetterFoliageMod.MOD_ID, BetterFoliageMod.bus) {
+
+    val rootModel = model {
+        verticalRectangle(x1 = -0.5, z1 = 0.5, x2 = 0.5, z2 = -0.5, yBottom = -1.5, yTop = -0.5)
+        .setFlatShader(FlatOffsetNoColor(Int3.zero))
+        .toCross(UP).addAll()
+    }
+    val flowerModel = model {
+        verticalRectangle(x1 = -0.5, z1 = 0.5, x2 = 0.5, z2 = -0.5, yBottom = 0.0, yTop = 1.0)
+        .scale(0.5).move(0.5 to DOWN)
+        .setFlatShader(FlatOffsetNoColor(Int3.zero))
+        .toCross(UP).addAll()
+    }
+    val rootIcon = spriteSet { idx -> Identifier(BetterFoliageMod.MOD_ID, "blocks/better_lilypad_roots_$idx") }
+    val flowerIcon = spriteSet { idx -> Identifier(BetterFoliageMod.MOD_ID, "blocks/better_lilypad_flower_$idx") }
+    val perturbs = vectorSet(64) { modelIdx -> xzDisk(modelIdx) * Config.lilypad.hOffset }
+
+    override fun isEligible(ctx: CombinedContext): Boolean =
+        Config.enabled && Config.lilypad.enabled &&
+        BlockConfig.lilypad.matchesClass(ctx.state.block)
+
+    override fun render(ctx: CombinedContext) {
+        ctx.render()
+
+        val rand = ctx.semiRandomArray(5)
+        ShadersModIntegration.grass(ctx) {
+            ctx.render(
+                rootModel.model,
+                translation = ctx.blockCenter.add(perturbs[rand[2]]),
+                forceFlat = true,
+                icon = { ctx, qi, q -> rootIcon[rand[qi and 1]] }
+            )
+        }
+
+        if (rand[3] < Config.lilypad.flowerChance) ctx.render(
+            flowerModel.model,
+            translation = ctx.blockCenter.add(perturbs[rand[4]]),
+            forceFlat = true,
+            icon = { _, _, _ -> flowerIcon[rand[0]] }
+        )
+    }
+}