Added falling block rules

gradle.properties

@@ -9,7 +9,7 @@ org.gradle.jvmargs=-Xmx1G
 	carpet_core_version=1.4.84+v221018
 
 # Mod Properties
-	mod_version = 1.19.2-1.0.0
+	mod_version = 1.19.2-1.1.0
 	maven_group = net.rober
 	archives_base_name = rober-carpet
 

src/main/java/net/rober/robercarpet/RoberCarpetSettings.java

@@ -9,4 +9,12 @@ public class RoberCarpetSettings {
 
     @Rule(desc="The amount of ticks before thunderstorm that are needed for the mod to warn you about it",category = "rober")
     public static int ThunderWarn = 0;
-}
+    @Rule(desc="Reintroduce the 1.12 falling block behavior",category={"rober","falling-block"})
+    public static boolean OldFallingBehavior = false;
+
+    @Rule(desc="Age in gameticks at which falling blocks die, -1 for infinity. (Vanilla is 600)",category = {"rober","falling-block"})
+    public static int FallingBlockDieAge = 600;
+
+    @Rule(desc="Falling blocks over walls would not have friction with the floor as in 1.12",category = {"rober","falling-block"})
+    public static boolean FallingBlockNoFrictionWithWalls = false;
+}

src/main/java/net/rober/robercarpet/mixin/FallingBlockMixin.java

@@ -0,0 +1,44 @@
+package net.rober.robercarpet.mixin;
+
+import net.minecraft.block.AbstractBlock;
+import net.minecraft.block.Block;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.Blocks;
+import net.minecraft.entity.FallingBlockEntity;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Vec3d;
+import net.rober.robercarpet.RoberCarpetSettings;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Constant;
+import org.spongepowered.asm.mixin.injection.ModifyConstant;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+@Mixin(FallingBlockEntity.class)
+public abstract class FallingBlockMixin {
+    @Redirect(method = "tick()V",at=@At(value="INVOKE",target="Lnet/minecraft/block/BlockState;isOf(Lnet/minecraft/block/Block;)Z"))
+    private boolean FallingBlockBehaviorMixin(BlockState blockHitResult, Block arg){
+        FallingBlockEntity self = (FallingBlockEntity) (Object) this;
+        BlockPos pos = new BlockPos(self.getPos().getX(),Math.ceil(self.getPos().getY()),self.getPos().getZ()).down();
+        Block underneath = self.world.getBlockState(pos).getBlock();
+        return blockHitResult.isOf(arg)||(underneath==Blocks.AIR&& RoberCarpetSettings.OldFallingBehavior);
+    }
+    @Redirect(method="tick()V",at=@At(value="INVOKE",target = "Lnet/minecraft/util/math/Vec3d;multiply(DDD)Lnet/minecraft/util/math/Vec3d;",ordinal = 0))
+    private Vec3d FrictionMixin(Vec3d vec,double x,double y,double z){
+        FallingBlockEntity self = (FallingBlockEntity) (Object) this;
+        BlockPos pos = new BlockPos(self.getPos().getX(),Math.ceil(self.getPos().getY()),self.getPos().getZ()).down();
+        Block underneath = self.world.getBlockState(pos).getBlock();
+        return underneath==Blocks.AIR&&RoberCarpetSettings.FallingBlockNoFrictionWithWalls?vec:vec.multiply(x,y,z);
+    }
+
+    @ModifyConstant(method = "tick()V",constant = @Constant(intValue = 600))
+    private int AgeMixin(int a){
+        if(RoberCarpetSettings.FallingBlockDieAge==-1) {
+            return (int) Double.POSITIVE_INFINITY;
+        } else if (RoberCarpetSettings.FallingBlockDieAge>0) {
+            return RoberCarpetSettings.FallingBlockDieAge;
+        }
+        return 600;
+    }
+
+}

src/main/resources/robercarpet.mixins.json

@@ -4,6 +4,7 @@
   "package": "net.rober.robercarpet.mixin",
   "compatibilityLevel": "JAVA_16",
   "mixins": [
+    "FallingBlockMixin",
     "SleepingDelayMixin",
     "ThunderWarnMixin"
   ],