From 771de74a03276a75d7100152b91428d520456108 Mon Sep 17 00:00:00 2001
From: gnembon <gnembonmc@gmail.com>
Date: Mon, 4 May 2020 22:07:22 -0300
Subject: [PATCH] noclip can place blocks intersecting with sefl

---
 .../mixins/BlockItem_creativeNoClipMixin.java | 36 +++++++++++++++++++
 src/main/resources/carpet.mixins.json         |  3 +-
 2 files changed, 38 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/carpet/mixins/BlockItem_creativeNoClipMixin.java

diff --git a/src/main/java/carpet/mixins/BlockItem_creativeNoClipMixin.java b/src/main/java/carpet/mixins/BlockItem_creativeNoClipMixin.java
new file mode 100644
index 00000000..f8c84c69
--- /dev/null
+++ b/src/main/java/carpet/mixins/BlockItem_creativeNoClipMixin.java
@@ -0,0 +1,36 @@
+package carpet.mixins;
+
+import carpet.CarpetSettings;
+import net.minecraft.block.BlockState;
+import net.minecraft.entity.EntityContext;
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.item.BlockItem;
+import net.minecraft.item.ItemPlacementContext;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.shape.VoxelShape;
+import net.minecraft.world.World;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+@Mixin(BlockItem.class)
+public class BlockItem_creativeNoClipMixin
+{
+    @Redirect(method = "canPlace", at = @At(
+            value = "INVOKE",
+            target = "Lnet/minecraft/world/World;canPlace(Lnet/minecraft/block/BlockState;Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/entity/EntityContext;)Z"
+    ))
+    private boolean canSpectatingPlace(World world, BlockState state, BlockPos pos, EntityContext context,
+                                       ItemPlacementContext contextOuter, BlockState stateOuter)
+    {
+        PlayerEntity player = contextOuter.getPlayer();
+        if (CarpetSettings.creativeNoClip && player != null && player.isCreative() && player.abilities.flying)
+        {
+            // copy from canPlace
+            VoxelShape voxelShape = state.getCollisionShape(world, pos, context);
+            return voxelShape.isEmpty() || world.intersectsEntities(player, voxelShape.offset(pos.getX(), pos.getY(), pos.getZ()));
+
+        }
+        return world.canPlace(state, pos, context);
+    }
+}
diff --git a/src/main/resources/carpet.mixins.json b/src/main/resources/carpet.mixins.json
index ce36d841..f8e4b733 100644
--- a/src/main/resources/carpet.mixins.json
+++ b/src/main/resources/carpet.mixins.json
@@ -158,7 +158,8 @@
     "WorldChunk_movableTEMixin",
     "PistonHandler_movableTEMixin",
     "PlayerEntity_creativeNoClipMixin",
-    "PistonBlockEntity_creativeNoClipMixin"
+    "PistonBlockEntity_creativeNoClipMixin",
+    "BlockItem_creativeNoClipMixin"
 
   ],
   "client": [