100 lines
4.1 KiB
Java
100 lines
4.1 KiB
Java
package carpet.mixins;
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import carpet.CarpetSettings;
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import carpet.fakes.WorldInterface;
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import carpet.utils.SpawnReporter;
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import net.minecraft.block.Block;
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import net.minecraft.entity.Entity;
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import net.minecraft.entity.EntityType;
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import net.minecraft.entity.mob.MobEntity;
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import net.minecraft.util.math.BlockPos;
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import net.minecraft.util.math.Box;
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import net.minecraft.util.shape.VoxelShape;
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import net.minecraft.util.shape.VoxelShapes;
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import net.minecraft.world.SpawnHelper;
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import net.minecraft.world.World;
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import org.spongepowered.asm.mixin.Mixin;
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import org.spongepowered.asm.mixin.injection.At;
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import org.spongepowered.asm.mixin.injection.Redirect;
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import java.util.Map;
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@Mixin(SpawnHelper.class)
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public class SpawnHelperMixin
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{
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// in World: private static Map<EntityType, Entity> precookedMobs= new HashMap<>();
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@Redirect(method = "spawnEntitiesInChunk", at = @At(
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value = "INVOKE",
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target = "Lnet/minecraft/world/World;doesNotCollide(Lnet/minecraft/util/math/Box;)Z"
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))
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private static boolean doesNotCollide(World world, Box bb)
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{
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//.doesNotCollide is VERY expensive. On the other side - most worlds are not made of trapdoors in
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// various configurations, but solid and 'passable' blocks, like air, water grass, etc.
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// checking if in the BB of the entity are only passable blocks is very cheap and covers most cases
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// in case something more complex happens - we default to full block collision check
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if (CarpetSettings.b_lagFreeSpawning)
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{
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BlockPos.Mutable blockpos = new BlockPos.Mutable();
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for (int y = (int)bb.minY, maxy = (int)Math.ceil(bb.maxY); y < maxy; y++)
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for (int x = (int)bb.minX, maxx = (int)Math.ceil(bb.maxX); x < maxx; x++)
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for (int z = (int)bb.minZ, maxz = (int)Math.ceil(bb.maxZ); z < maxz; z++)
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{
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blockpos.set(x, y, z);
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VoxelShape box = world.getBlockState(blockpos).getCollisionShape(world, blockpos);
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if ( box == VoxelShapes.empty())
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continue;
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if (Block.isShapeFullCube(box))
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return false;
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return world.doesNotCollide(bb);
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}
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return true;
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}
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return world.doesNotCollide(bb);
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}
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@Redirect(method = "spawnEntitiesInChunk", at = @At(
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value = "INVOKE",
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target = "Lnet/minecraft/entity/EntityType;create(Lnet/minecraft/world/World;)Lnet/minecraft/entity/Entity;"
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))
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private static Entity create(EntityType<?> entityType, World world_1)
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{
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if (CarpetSettings.b_lagFreeSpawning)
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{
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Map<EntityType, Entity> precookedMobs = ((WorldInterface)world_1).getPrecookedMobs();
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if (precookedMobs.containsKey(entityType))
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//this mob has been <init>'s but not used yet
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return precookedMobs.get(entityType);
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Entity e = entityType.create(world_1);
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precookedMobs.put(entityType, e);
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return e;
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}
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return entityType.create(world_1);
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}
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@Redirect(method = "spawnEntitiesInChunk", at = @At(
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value = "INVOKE",
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target = "Lnet/minecraft/world/World;spawnEntity(Lnet/minecraft/entity/Entity;)Z"
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))
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private static boolean spawnEntity(World world, Entity entity_1)
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{
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if (CarpetSettings.b_lagFreeSpawning)
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// we used the mob - next time we will create a new one when needed
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((WorldInterface) world).getPrecookedMobs().remove(entity_1.getType());
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if (SpawnReporter.track_spawns > 0L && SpawnReporter.local_spawns != null)
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{
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SpawnReporter.registerSpawn(
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world.dimension.getType(),
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(MobEntity) entity_1,
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entity_1.getType().getCategory(),
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entity_1.getBlockPos());
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}
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if (!SpawnReporter.mock_spawns)
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return world.spawnEntity(entity_1);
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return false;
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}
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}
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