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snow block at bottom of schematic causes extra snowy grass block to be added

leedagee opened this issue ยท 0 comments

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Describe the Bug

For some reason, SchematicWorld#getBlockState will return a fake grass block if the coordinates below the SchematicWorld's bounds. If there is a snow block at the bottom and it will transform the fake grass block into a snowy one which causes a setBlock call that actually added the fake block and extends the bounds. With extended bounds, there will be no more snow blocks at the bottom so that only one snowy grass block will be added into the fake world. This extra snowy grass block will be rendered and placed in the normal world eventually.

Reproduction Steps

  1. create a schematic with only one snow block
  2. load the schematic, place it and move it if necessary
  3. see the extra block

Expected Result

there is no extra blocks

Screenshots and Videos

https://www.bilibili.com/video/BV1214y1x7x4 from the original reporter
2022-08-27_11 07 09
2022-08-27_11 07 20

Crash Report or Log

https://fars.ee/cT-m (F3+C forced crash)

Operating System

Linux X11

Mod Version

0.5.0d

Minecraft Version

1.18.2

Forge Version

40.1.60

Other Mods

Default development environment at commit efdcbb4 with jei and curios.

Additional Context

a9c710f may be the first commit with this issue (not bisected, but code search and git blame)

		if (pos.getY() - bounds.minY() == -1 && !renderMode)
			return Blocks.GRASS_BLOCK.defaultBlockState();

suspicious setBlock call stack trace

setBlock:205, SchematicWorld (com.simibubi.create.content.schematics)
lambda$updateShapeAtEdge$4:359, StructureTemplate (net.minecraft.world.level.levelgen.structure.templatesystem)
consume:-1, StructureTemplate$$Lambda$11307/0x000000080153f648 (net.minecraft.world.level.levelgen.structure.templatesystem)
forAllAxisFaces:194, DiscreteVoxelShape (net.minecraft.world.phys.shapes)
forAllFaces:174, DiscreteVoxelShape (net.minecraft.world.phys.shapes)
updateShapeAtEdge:347, StructureTemplate (net.minecraft.world.level.levelgen.structure.templatesystem)
placeInWorld:311, StructureTemplate (net.minecraft.world.level.levelgen.structure.templatesystem)
setupRenderer:160, SchematicHandler (com.simibubi.create.content.schematics.client)
init:134, SchematicHandler (com.simibubi.create.content.schematics.client)
tick:113, SchematicHandler (com.simibubi.create.content.schematics.client)
onTick:130, ClientEvents (com.simibubi.create.events)
invoke:-1, ASMEventHandler_127_ClientEvents_onTick_ClientTickEvent (net.minecraftforge.eventbus)
invoke:85, ASMEventHandler (net.minecraftforge.eventbus)
invoke:-1, EventBus$$Lambda$4452/0x0000000800b64de0 (net.minecraftforge.eventbus)
post:302, EventBus (net.minecraftforge.eventbus)
post:283, EventBus (net.minecraftforge.eventbus)
onPostClientTick:907, ForgeEventFactory (net.minecraftforge.event)
tick:1797, Minecraft (net.minecraft.client)
runTick:1045, Minecraft (net.minecraft.client)
run:668, Minecraft (net.minecraft.client)
main:205, Main (net.minecraft.client.main)
invoke0:-1, NativeMethodAccessorImpl (jdk.internal.reflect)
invoke:77, NativeMethodAccessorImpl (jdk.internal.reflect)
invoke:43, DelegatingMethodAccessorImpl (jdk.internal.reflect)
invoke:568, Method (java.lang.reflect)
lambda$launchService$0:24, ForgeClientUserdevLaunchHandler (net.minecraftforge.fml.loading.targets)
call:-1, ForgeClientUserdevLaunchHandler$$Lambda$846/0x000000080047d810 (net.minecraftforge.fml.loading.targets)
launch:37, LaunchServiceHandlerDecorator (cpw.mods.modlauncher)
launch:53, LaunchServiceHandler (cpw.mods.modlauncher)
launch:71, LaunchServiceHandler (cpw.mods.modlauncher)
run:106, Launcher (cpw.mods.modlauncher)
main:77, Launcher (cpw.mods.modlauncher)
accept:26, BootstrapLaunchConsumer (cpw.mods.modlauncher)
accept:23, BootstrapLaunchConsumer (cpw.mods.modlauncher)
main:149, BootstrapLauncher (cpw.mods.bootstraplauncher)```