implement snow and snow layer

That makes snowy biomes in pre flattening versions much nicer to see

src/main/java/de/bixilon/minosoft/data/registries/blocks/factory/BlockFactories.kt

@@ -28,6 +28,8 @@ import de.bixilon.minosoft.data.registries.blocks.types.fluid.water.WaterFluidBl
 import de.bixilon.minosoft.data.registries.blocks.types.pixlyzer.SlimeBlock
 import de.bixilon.minosoft.data.registries.blocks.types.pixlyzer.snow.PowderSnowBlock
 import de.bixilon.minosoft.data.registries.blocks.types.pvp.CobwebBlock
+import de.bixilon.minosoft.data.registries.blocks.types.snow.SnowBlock
+import de.bixilon.minosoft.data.registries.blocks.types.snow.SnowLayerBlock
 import de.bixilon.minosoft.data.registries.blocks.types.stone.RockBlock
 import de.bixilon.minosoft.data.registries.blocks.types.wood.*
 import de.bixilon.minosoft.data.registries.factory.DefaultFactory
@@ -68,6 +70,8 @@ object BlockFactories : DefaultFactory<BlockFactory<*>>(
     Cherry.Leaves,
     Azalea.Leaves,
     FloweringAzalea.Leaves,
+
+    SnowBlock, SnowLayerBlock,
 ) {
 
     fun build(name: ResourceLocation, registries: Registries, settings: BlockSettings): Block? {

src/main/java/de/bixilon/minosoft/data/registries/blocks/properties/BlockProperties.kt

@@ -21,6 +21,7 @@ import de.bixilon.minosoft.data.registries.blocks.state.BlockState
 import de.bixilon.minosoft.data.registries.blocks.types.Block
 import de.bixilon.minosoft.data.registries.blocks.types.dirt.SnowyBlock
 import de.bixilon.minosoft.data.registries.blocks.types.fluid.FluidBlock
+import de.bixilon.minosoft.data.registries.blocks.types.snow.SnowLayerBlock
 
 @Deprecated("Fallback data")
 object BlockProperties {
@@ -63,7 +64,7 @@ object BlockProperties {
     val MULTIPART_UP = EnumProperty("up", MultipartDirections).register()
     val MULTIPART_DOWN = EnumProperty("down", MultipartDirections).register()
 
-    val SNOW_LAYERS = IntProperty("layers").register()
+    val SNOW_LAYERS = SnowLayerBlock.LAYERS.register()
     val FENCE_IN_WALL = BooleanProperty("in_wall").register()
     val SCAFFOLDING_BOTTOM = BooleanProperty("bottom").register()
     val TRIPWIRE_DISARMED = BooleanProperty("disarmed").register()

src/main/java/de/bixilon/minosoft/data/registries/blocks/state/builder/BlockStateSettings.kt

@@ -29,8 +29,8 @@ import de.bixilon.minosoft.data.registries.shapes.voxel.AbstractVoxelShape.Compa
 class BlockStateSettings(
     val properties: Map<BlockProperty<*>, Any>?,
     val luminance: Int,
-    val collisionShape: AbstractVoxelShape?,
+    var collisionShape: AbstractVoxelShape?,
-    val outlineShape: AbstractVoxelShape?,
+    var outlineShape: AbstractVoxelShape?,
     val lightProperties: LightProperties,
     @Deprecated("pixlyzer") val solidRenderer: Boolean,
 ) {

src/main/java/de/bixilon/minosoft/data/registries/blocks/types/dirt/SnowyBlock.kt

@@ -14,12 +14,12 @@
 package de.bixilon.minosoft.data.registries.blocks.types.dirt
 
 import de.bixilon.minosoft.data.direction.Directions
-import de.bixilon.minosoft.data.registries.blocks.MinecraftBlocks
 import de.bixilon.minosoft.data.registries.blocks.properties.list.MapPropertyList
 import de.bixilon.minosoft.data.registries.blocks.properties.primitives.BooleanProperty
 import de.bixilon.minosoft.data.registries.blocks.settings.BlockSettings
 import de.bixilon.minosoft.data.registries.blocks.state.BlockState
 import de.bixilon.minosoft.data.registries.blocks.types.Block
+import de.bixilon.minosoft.data.registries.blocks.types.snow.AbstractSnowBlock
 import de.bixilon.minosoft.data.registries.identified.ResourceLocation
 import de.bixilon.minosoft.gui.rendering.RenderContext
 import de.bixilon.minosoft.gui.rendering.models.block.state.DirectBlockModel
@@ -52,7 +52,7 @@ abstract class SnowyBlock(identifier: ResourceLocation, settings: BlockSettings)
 
         override fun pick(neighbours: Array<BlockState?>): BlockRender? {
             val above = neighbours[Directions.O_UP] ?: return normal
-            if (above.block == MinecraftBlocks.SNOW || above.block == MinecraftBlocks.SNOW_BLOCK) return snowy
+            if (above.block is AbstractSnowBlock) return snowy
 
             return normal
         }

src/main/java/de/bixilon/minosoft/data/registries/blocks/types/properties/shape/collision/fixed/FixedCollidable.kt

@@ -14,8 +14,10 @@
 package de.bixilon.minosoft.data.registries.blocks.types.properties.shape.collision.fixed
 
 import de.bixilon.kotlinglm.vec3.Vec3i
+import de.bixilon.kutil.cast.CastUtil.nullCast
 import de.bixilon.minosoft.data.entities.block.BlockEntity
 import de.bixilon.minosoft.data.registries.blocks.shapes.collision.context.CollisionContext
+import de.bixilon.minosoft.data.registries.blocks.state.AdvancedBlockState
 import de.bixilon.minosoft.data.registries.blocks.state.BlockState
 import de.bixilon.minosoft.data.registries.blocks.types.properties.shape.collision.CollidableBlock
 import de.bixilon.minosoft.data.registries.shapes.voxel.AbstractVoxelShape
@@ -25,7 +27,9 @@ import de.bixilon.minosoft.data.registries.shapes.voxel.AbstractVoxelShape
  */
 interface FixedCollidable : CollidableBlock {
 
-    fun getCollisionShape(blockState: BlockState): AbstractVoxelShape?
+    fun getCollisionShape(state: BlockState): AbstractVoxelShape? {
+        return state.nullCast<AdvancedBlockState>()?.collisionShape
+    }
 
     override fun getCollisionShape(context: CollisionContext, blockPosition: Vec3i, state: BlockState, blockEntity: BlockEntity?): AbstractVoxelShape? {
         return getCollisionShape(state)

src/main/java/de/bixilon/minosoft/data/registries/blocks/types/properties/shape/collision/fixed/StatelessCollidable.kt

@@ -22,7 +22,7 @@ import de.bixilon.minosoft.data.registries.shapes.voxel.AbstractVoxelShape
 interface StatelessCollidable : FixedCollidable {
     val collisionShape: AbstractVoxelShape
 
-    override fun getCollisionShape(blockState: BlockState): AbstractVoxelShape {
+    override fun getCollisionShape(state: BlockState): AbstractVoxelShape {
         return collisionShape
     }
 }

src/main/java/de/bixilon/minosoft/data/registries/blocks/types/snow/AbstractSnowBlock.kt

@@ -0,0 +1,16 @@
+/*
+ * Minosoft
+ * Copyright (C) 2020-2023 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.data.registries.blocks.types.snow
+
+interface AbstractSnowBlock

src/main/java/de/bixilon/minosoft/data/registries/blocks/types/snow/SnowBlock.kt

@@ -0,0 +1,39 @@
+/*
+ * Minosoft
+ * Copyright (C) 2020-2023 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.data.registries.blocks.types.snow
+
+import de.bixilon.minosoft.data.registries.blocks.factory.BlockFactory
+import de.bixilon.minosoft.data.registries.blocks.settings.BlockSettings
+import de.bixilon.minosoft.data.registries.blocks.types.Block
+import de.bixilon.minosoft.data.registries.blocks.types.legacy.FlatteningRenamedModel
+import de.bixilon.minosoft.data.registries.blocks.types.properties.item.BlockWithItem
+import de.bixilon.minosoft.data.registries.blocks.types.properties.shape.special.FullOpaqueBlock
+import de.bixilon.minosoft.data.registries.identified.Namespaces.minecraft
+import de.bixilon.minosoft.data.registries.identified.ResourceLocation
+import de.bixilon.minosoft.data.registries.item.items.Item
+import de.bixilon.minosoft.data.registries.item.items.tool.shovel.ShovelRequirement
+import de.bixilon.minosoft.data.registries.registries.Registries
+
+class SnowBlock(identifier: ResourceLocation = Companion.identifier, settings: BlockSettings) : Block(identifier, settings), FullOpaqueBlock, FlatteningRenamedModel, ShovelRequirement, BlockWithItem<Item>, AbstractSnowBlock {
+    override val item: Item = this::item.inject(identifier)
+    override val hardness get() = 0.2f
+    override val legacyModelName get() = minecraft("snow")
+
+
+    companion object : BlockFactory<SnowBlock> {
+        override val identifier = minecraft("snow_block")
+
+        override fun build(registries: Registries, settings: BlockSettings) = SnowBlock(settings = settings)
+    }
+}

src/main/java/de/bixilon/minosoft/data/registries/blocks/types/snow/SnowLayerBlock.kt

@@ -0,0 +1,60 @@
+/*
+ * Minosoft
+ * Copyright (C) 2020-2023 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.data.registries.blocks.types.snow
+
+import de.bixilon.kutil.primitive.IntUtil.toInt
+import de.bixilon.minosoft.data.registries.blocks.factory.BlockFactory
+import de.bixilon.minosoft.data.registries.blocks.properties.BlockProperties
+import de.bixilon.minosoft.data.registries.blocks.properties.primitives.IntProperty
+import de.bixilon.minosoft.data.registries.blocks.settings.BlockSettings
+import de.bixilon.minosoft.data.registries.blocks.state.AdvancedBlockState
+import de.bixilon.minosoft.data.registries.blocks.state.BlockState
+import de.bixilon.minosoft.data.registries.blocks.state.builder.BlockStateBuilder
+import de.bixilon.minosoft.data.registries.blocks.state.builder.BlockStateSettings
+import de.bixilon.minosoft.data.registries.blocks.types.Block
+import de.bixilon.minosoft.data.registries.blocks.types.legacy.FlatteningRenamedModel
+import de.bixilon.minosoft.data.registries.blocks.types.properties.item.BlockWithItem
+import de.bixilon.minosoft.data.registries.blocks.types.properties.shape.collision.fixed.FixedCollidable
+import de.bixilon.minosoft.data.registries.blocks.types.properties.shape.outline.OutlinedBlock
+import de.bixilon.minosoft.data.registries.identified.Namespaces.minecraft
+import de.bixilon.minosoft.data.registries.identified.ResourceLocation
+import de.bixilon.minosoft.data.registries.item.items.Item
+import de.bixilon.minosoft.data.registries.item.items.tool.shovel.ShovelRequirement
+import de.bixilon.minosoft.data.registries.registries.Registries
+import de.bixilon.minosoft.data.registries.shapes.voxel.VoxelShape
+
+class SnowLayerBlock(identifier: ResourceLocation = Companion.identifier, settings: BlockSettings) : Block(identifier, settings), FixedCollidable, OutlinedBlock, FlatteningRenamedModel, ShovelRequirement, BlockWithItem<Item>, AbstractSnowBlock, BlockStateBuilder {
+    override val item: Item = this::item.inject(identifier)
+    override val hardness get() = 0.1f
+    override val legacyModelName get() = minecraft("snow_layer")
+
+    override fun buildState(settings: BlockStateSettings): BlockState {
+        val layer = settings.properties?.get(BlockProperties.SNOW_LAYERS)?.toInt() ?: return BlockState(this, settings)
+
+        settings.collisionShape = VoxelShape(0.0, 0.0, 0.0, 1.0, (layer - 1) * LAYER_HEIGHT, 1.0)
+        settings.outlineShape = VoxelShape(0.0, 0.0, 0.0, 1.0, layer * LAYER_HEIGHT, 1.0)
+        return AdvancedBlockState(this, settings)
+    }
+
+
+    companion object : BlockFactory<SnowLayerBlock> {
+        override val identifier = minecraft("snow")
+        private const val LAYER_COUNT = 8
+        private const val LAYER_HEIGHT = 1.0 / LAYER_COUNT
+        val LAYERS = IntProperty("layers", 1..LAYER_COUNT)
+
+
+        override fun build(registries: Registries, settings: BlockSettings) = SnowLayerBlock(settings = settings)
+    }
+}