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c5a10665b8
Spigot still maintains some partial implementation of "tick skipping", a practice in which the MinecraftServer.currentTick field is updated not by an increment of one per actual tick, but instead set to System.currentTimeMillis() / 50. This behaviour means that the tracked tick may "skip" a tick value in case a previous tick took more than the expected 50ms. To compensate for this in important paths, spigot/craftbukkit implements "wall-time". Instead of incrementing/decrementing ticks on block entities/entities by one for each call to their tick() method, they instead increment/decrement important values, like an ItemEntity's age or pickupDelay, by the difference of `currentTick - lastTick`, where `lastTick` is the value of `currentTick` during the last tick() call. These "fixes" however do not play nicely with minecraft's simulation distance as entities/block entities implementing the above behaviour would "catch up" their values when moving from a non-ticking chunk to a ticking one as their `lastTick` value remains stuck on the last tick in a ticking chunk and hence lead to a large "catch up" once ticked again. Paper completely removes the "tick skipping" behaviour (See patch "Further-improve-server-tick-loop"), making the above precautions completely unnecessary, which also rids paper of the previous described incompatibility with non-ticking chunks.
30 lines
2 KiB
Diff
30 lines
2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: ruViolence <78062896+ruViolence@users.noreply.github.com>
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Date: Tue, 27 Jun 2023 15:38:18 +0800
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Subject: [PATCH] Configurable entity tracking range by Y coordinate
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Options to configure entity tracking by Y coordinate, also for each entity category.
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diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
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index dca6087dc4e1c177c3dfdae01f140cf80c179803..57af5d1986021c9a135599c6f55b091aebd3bab7 100644
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--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
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+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
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@@ -1524,7 +1524,17 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
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double d0 = (double) Math.min(this.getEffectiveRange(), i * 16);
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double d1 = vec3d.x * vec3d.x + vec3d.z * vec3d.z;
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double d2 = d0 * d0;
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- boolean flag = d1 <= d2 && this.entity.broadcastToPlayer(player) && ChunkMap.this.isChunkTracked(player, this.entity.chunkPosition().x, this.entity.chunkPosition().z);
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+ // Paper start - Configurable entity tracking range by Y
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+ boolean flag = d1 <= d2;
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+ if (flag && level.paperConfig().entities.trackingRangeY.enabled) {
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+ double rangeY = level.paperConfig().entities.trackingRangeY.get(this.entity, -1);
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+ if (rangeY != -1) {
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+ double vec3d_dy = player.getY() - this.entity.getY();
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+ flag = vec3d_dy * vec3d_dy <= rangeY * rangeY;
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+ }
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+ }
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+ flag = flag && this.entity.broadcastToPlayer(player) && ChunkMap.this.isChunkTracked(player, this.entity.chunkPosition().x, this.entity.chunkPosition().z);
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+ // Paper end - Configurable entity tracking range by Y
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// CraftBukkit start - respect vanish API
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if (!player.getBukkitEntity().canSee(this.entity.getBukkitEntity())) {
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