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Use world-specific collider entity

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This is equally an ugly hack, but means we're at least not constructing
entities with null worlds any more.

Ideally we could always use the turtle entity, but this will require a
bit more of a refactor.

Fixes #265
This commit is contained in:
SquidDev 2019-07-05 22:09:42 +01:00
parent 18068effec
commit 9d51c4c340
1 changed files with 25 additions and 13 deletions
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38
src/main/java/dan200/computercraft/shared/util/WorldUtil.java
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@ -7,6 +7,7 @@
package dan200.computercraft.shared.util;
import com.google.common.base.Predicate;
import com.google.common.collect.MapMaker;
import net.minecraft.block.BlockState;
import net.minecraft.entity.*;
import net.minecraft.entity.item.ItemEntity;
@ -20,25 +21,35 @@
import javax.annotation.Nonnull;
import java.util.List;
import java.util.Map;
public final class WorldUtil
{
@SuppressWarnings( "Guava" )
private static final Predicate<Entity> CAN_COLLIDE = x -> x != null && x.isAlive() && x.canBeCollidedWith();
private static final Entity ENTITY = new ItemEntity( EntityType.ITEM, null )
{
@Override
public EntitySize getSize( Pose pose )
{
return EntitySize.fixed( 0, 0 );
}
};
private static final Map<World, Entity> entityCache = new MapMaker().weakKeys().weakValues().makeMap();
static
private static synchronized Entity getEntity( World world )
{
ENTITY.noClip = true;
ENTITY.recalculateSize();
// TODO: It'd be nice if we could avoid this. Maybe always use the turtle player (if it's available).
Entity entity = entityCache.get( world );
if( entity != null ) return entity;
entity = new ItemEntity( EntityType.ITEM, world )
{
@Nonnull
@Override
public EntitySize getSize( Pose pose )
{
return EntitySize.fixed( 0, 0 );
}
};
entity.noClip = true;
entity.recalculateSize();
entityCache.put( world, entity );
return entity;
}
public static boolean isLiquidBlock( World world, BlockPos pos )
@ -61,8 +72,9 @@ public static Pair<Entity, Vec3d> rayTraceEntities( World world, Vec3d vecStart,
Vec3d vecEnd = vecStart.add( vecDir.x * distance, vecDir.y * distance, vecDir.z * distance );
// Raycast for blocks
ENTITY.setPosition( vecStart.x, vecStart.y, vecStart.z );
RayTraceContext context = new RayTraceContext( vecStart, vecEnd, RayTraceContext.BlockMode.COLLIDER, RayTraceContext.FluidMode.NONE, ENTITY );
Entity collisionEntity = getEntity( world );
collisionEntity.setPosition( vecStart.x, vecStart.y, vecStart.z );
RayTraceContext context = new RayTraceContext( vecStart, vecEnd, RayTraceContext.BlockMode.COLLIDER, RayTraceContext.FluidMode.NONE, collisionEntity );
RayTraceResult result = world.rayTraceBlocks( context );
if( result != null && result.getType() == RayTraceResult.Type.BLOCK )
{