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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.
75 lines
3.1 KiB
Diff
75 lines
3.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: MWHunter <s0521458@student.rockvalleycollege.edu>
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Date: Wed, 24 Aug 2022 09:54:11 -0400
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Subject: [PATCH] Stop large look changes from crashing the server
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Co-authored-by: Jaren Knodel <Jaren@Knodel.com>
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diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
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index 5383d231748f2d30b2f2bf3ce07d3667e4d828e9..e6d20887572817099cb863515978d3f06926be3d 100644
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--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
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+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
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@@ -3158,37 +3158,15 @@ public abstract class LivingEntity extends Entity implements Attackable {
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this.level().getProfiler().pop();
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this.level().getProfiler().push("rangeChecks");
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- while (this.getYRot() - this.yRotO < -180.0F) {
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- this.yRotO -= 360.0F;
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- }
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-
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- while (this.getYRot() - this.yRotO >= 180.0F) {
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- this.yRotO += 360.0F;
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- }
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+ // Paper start - stop large pitch and yaw changes from crashing the server
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+ this.yRotO += Math.round((this.getYRot() - this.yRotO) / 360.0F) * 360.0F;
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- while (this.yBodyRot - this.yBodyRotO < -180.0F) {
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- this.yBodyRotO -= 360.0F;
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- }
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+ this.yBodyRotO += Math.round((this.yBodyRot - this.yBodyRotO) / 360.0F) * 360.0F;
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- while (this.yBodyRot - this.yBodyRotO >= 180.0F) {
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- this.yBodyRotO += 360.0F;
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- }
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-
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- while (this.getXRot() - this.xRotO < -180.0F) {
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- this.xRotO -= 360.0F;
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- }
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+ this.xRotO += Math.round((this.getXRot() - this.xRotO) / 360.0F) * 360.0F;
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- while (this.getXRot() - this.xRotO >= 180.0F) {
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- this.xRotO += 360.0F;
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- }
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-
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- while (this.yHeadRot - this.yHeadRotO < -180.0F) {
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- this.yHeadRotO -= 360.0F;
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- }
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-
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- while (this.yHeadRot - this.yHeadRotO >= 180.0F) {
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- this.yHeadRotO += 360.0F;
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- }
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+ this.yHeadRotO += Math.round((this.yHeadRot - this.yHeadRotO) / 360.0F) * 360.0F;
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+ // Paper end
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this.level().getProfiler().pop();
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this.animStep += f2;
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diff --git a/src/main/java/net/minecraft/world/entity/projectile/Projectile.java b/src/main/java/net/minecraft/world/entity/projectile/Projectile.java
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index 06ca07edef062f21c51860146086297ca345104d..63ffa02f820d88f865ae604712edcf2ac13f0bff 100644
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--- a/src/main/java/net/minecraft/world/entity/projectile/Projectile.java
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+++ b/src/main/java/net/minecraft/world/entity/projectile/Projectile.java
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@@ -313,13 +313,7 @@ public abstract class Projectile extends Entity implements TraceableEntity {
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}
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protected static float lerpRotation(float prevRot, float newRot) {
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- while (newRot - prevRot < -180.0F) {
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- prevRot -= 360.0F;
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- }
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-
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- while (newRot - prevRot >= 180.0F) {
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- prevRot += 360.0F;
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- }
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+ prevRot += Math.round((newRot - prevRot) / 360.0F) * 360.0F; // Paper - stop large look changes from crashing the server
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return Mth.lerp(0.2F, prevRot, newRot);
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}
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