physics: slime block bouncing

src/main/java/de/bixilon/minosoft/data/mappings/blocks/types/Block.kt

@@ -14,6 +14,7 @@ package de.bixilon.minosoft.data.mappings.blocks.types
 
 import com.google.gson.JsonObject
 import de.bixilon.minosoft.data.entities.block.BlockEntity
+import de.bixilon.minosoft.data.entities.entities.Entity
 import de.bixilon.minosoft.data.inventory.ItemStack
 import de.bixilon.minosoft.data.mappings.ResourceLocation
 import de.bixilon.minosoft.data.mappings.blocks.BlockState
@@ -105,6 +106,8 @@ open class Block(
 
     open fun randomTick(connection: PlayConnection, blockState: BlockState, blockPosition: Vec3i, random: Random) {}
 
+    open fun onEntityLand(connection: PlayConnection, entity: Entity, blockPosition: Vec3i, blockState: BlockState) {}
+
     companion object : ResourceLocationDeserializer<Block> {
         override fun deserialize(mappings: Registries?, resourceLocation: ResourceLocation, data: JsonObject): Block {
             check(mappings != null) { "Registries is null!" }
@@ -118,6 +121,7 @@ open class Block(
                 "ComparatorBlock" -> ComparatorBlock(resourceLocation, mappings, data)
                 "CampfireBlock" -> CampfireBlock(resourceLocation, mappings, data)
                 "TorchBlock" -> TorchBlock(resourceLocation, mappings, data)
+                "SlimeBlock" -> SlimeBlock(resourceLocation, mappings, data)
                 else -> Block(resourceLocation, mappings, data)
             }
 

src/main/java/de/bixilon/minosoft/data/mappings/blocks/types/SlimeBlock.kt

@@ -0,0 +1,42 @@
+/*
+ * Minosoft
+ * Copyright (C) 2021 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.mappings.blocks.types
+
+import com.google.gson.JsonObject
+import de.bixilon.minosoft.data.entities.entities.Entity
+import de.bixilon.minosoft.data.mappings.ResourceLocation
+import de.bixilon.minosoft.data.mappings.blocks.BlockState
+import de.bixilon.minosoft.data.mappings.versions.Registries
+import de.bixilon.minosoft.protocol.network.connection.PlayConnection
+import glm_.vec3.Vec3i
+
+open class SlimeBlock(resourceLocation: ResourceLocation, mappings: Registries, data: JsonObject) : Block(resourceLocation, mappings, data) {
+
+    override fun onEntityLand(connection: PlayConnection, entity: Entity, blockPosition: Vec3i, blockState: BlockState) {
+        super.onEntityLand(connection, entity, blockPosition, blockState)
+
+        if (entity.isSneaking) {
+            return
+        }
+
+        bounce(entity)
+    }
+
+    private fun bounce(entity: Entity) {
+        if (entity.velocity.y < 0.0) {
+            entity.velocity.y = -entity.velocity.y
+        }
+    }
+}
+

src/main/java/de/bixilon/minosoft/data/player/LocalPlayerEntity.kt

@@ -303,6 +303,10 @@ class LocalPlayerEntity(
 
         val collisionMovement = connection.collisionDetector.collide(null, movement, aabb, true)
 
+
+        forceMove(collisionMovement)
+
+
         horizontalCollision = collisionMovement.x != movement.x || collisionMovement.z != movement.z
         verticalCollision = collisionMovement.y != movement.y
         this.onGround = verticalCollision && movement.y < 0.0f
@@ -310,18 +314,34 @@ class LocalPlayerEntity(
 
         fall(collisionMovement.y)
 
+        var velocityChanged = false
+        if (movement.y != collisionMovement.y) {
+            if (movement.y < 0.0 && collisionMovement.y != 0.0) {
+                val landingPosition = belowBlockPosition
+                val landingBlockState = connection.world[belowBlockPosition]
+
+                val previousVelocity = Vec3d(velocity)
+                landingBlockState?.block?.onEntityLand(connection, this, landingPosition, landingBlockState)
+
+                velocityChanged = velocity != previousVelocity
+            }
+
+            if (!velocityChanged) {
+                velocity.y = 0.0
+            }
+        }
+
+        if (!velocityChanged) {
             if (movement.x != collisionMovement.x) {
                 velocity.x = 0.0
             }
-        if (movement.y != collisionMovement.y) {
-            velocity.y = 0.0
-        }
+
             if (movement.z != collisionMovement.z) {
                 velocity.z = 0.0
             }
+        }
 
 
-        forceMove(collisionMovement)
 
         if (onGround && canStep) {
             // ToDo: Play step sound

src/main/java/de/bixilon/minosoft/datafixer/BlockEntityFixer.kt

@@ -52,6 +52,7 @@ object BlockEntityFixer {
         "Airportal" to "minecraft:end_portal",
         "EndGateway" to "minecraft:end_gateway",
         "Banner" to "minecraft:shield",
+        "minecraft:noteblock" to "minecraft:note_block"
     ).asResourceLocationMap()