2021-06-11 12:02:28 +00:00
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <spottedleaf@spottedleaf.dev>
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Date: Sun, 17 May 2020 23:47:33 -0700
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Subject: [PATCH] Fix for large move vectors crashing server
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Check movement distance also based on current position.
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diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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2021-06-14 16:58:00 +00:00
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index e3725db7e19fe3235ec25beffca26a7eede24394..0e0d6d298caa1bbb6fb0dd42fd00460f7609c431 100644
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2021-06-11 12:02:28 +00:00
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--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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2021-06-14 16:58:00 +00:00
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@@ -507,19 +507,24 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
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2021-06-11 12:02:28 +00:00
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if (entity != this.player && entity.getControllingPassenger() == this.player && entity == this.lastVehicle) {
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ServerLevel worldserver = this.player.getLevel();
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- double d0 = entity.getX();
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- double d1 = entity.getY();
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- double d2 = entity.getZ();
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2021-06-14 16:58:00 +00:00
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- double d3 = ServerGamePacketListenerImpl.clampHorizontal(packet.getX());
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- double d4 = ServerGamePacketListenerImpl.clampVertical(packet.getY());
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- double d5 = ServerGamePacketListenerImpl.clampHorizontal(packet.getZ());
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+ double d0 = entity.getX();final double fromX = d0; // Paper - OBFHELPER
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+ double d1 = entity.getY();final double fromY = d1; // Paper - OBFHELPER
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+ double d2 = entity.getZ();final double fromZ = d2; // Paper - OBFHELPER
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+ double d3 = ServerGamePacketListenerImpl.clampHorizontal(packet.getX());final double toX = d3; // Paper - OBFHELPER
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+ double d4 = ServerGamePacketListenerImpl.clampVertical(packet.getY());final double toY = d4; // Paper - OBFHELPER
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+ double d5 = ServerGamePacketListenerImpl.clampHorizontal(packet.getZ());final double toZ = d5; // Paper - OBFHELPER
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float f = Mth.wrapDegrees(packet.getYRot());
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float f1 = Mth.wrapDegrees(packet.getXRot());
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2021-06-11 12:02:28 +00:00
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double d6 = d3 - this.vehicleFirstGoodX;
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double d7 = d4 - this.vehicleFirstGoodY;
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double d8 = d5 - this.vehicleFirstGoodZ;
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double d9 = entity.getDeltaMovement().lengthSqr();
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- double d10 = d6 * d6 + d7 * d7 + d8 * d8;
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+ // Paper start - fix large move vectors killing the server
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+ double currDeltaX = toX - fromX;
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+ double currDeltaY = toY - fromY;
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+ double currDeltaZ = toZ - fromZ;
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+ double d10 = Math.max(d6 * d6 + d7 * d7 + d8 * d8, (currDeltaX * currDeltaX + currDeltaY * currDeltaY + currDeltaZ * currDeltaZ) - 1);
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+ // Paper end - fix large move vectors killing the server
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// CraftBukkit start - handle custom speeds and skipped ticks
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2021-06-14 16:58:00 +00:00
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@@ -1252,14 +1257,19 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
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float prevPitch = this.player.getXRot();
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// CraftBukkit end
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double d3 = this.player.getX(); final double toX = d3; // Paper - OBFHELPER
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- double d4 = this.player.getY();
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+ double d4 = this.player.getY(); final double toY = d4; // Paper - OBFHELPER
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double d5 = this.player.getZ(); final double toZ = d5; // Paper - OBFHELPER
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double d6 = this.player.getY();
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double d7 = d0 - this.firstGoodX;
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double d8 = d1 - this.firstGoodY;
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double d9 = d2 - this.firstGoodZ;
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2021-06-11 12:02:28 +00:00
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double d10 = this.player.getDeltaMovement().lengthSqr();
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- double d11 = d7 * d7 + d8 * d8 + d9 * d9;
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+ // Paper start - fix large move vectors killing the server
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+ double currDeltaX = toX - prevX;
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+ double currDeltaY = toY - prevY;
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+ double currDeltaZ = toZ - prevZ;
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+ double d11 = Math.max(d7 * d7 + d8 * d8 + d9 * d9, (currDeltaX * currDeltaX + currDeltaY * currDeltaY + currDeltaZ * currDeltaZ) - 1);
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+ // Paper end - fix large move vectors killing the server
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if (this.player.isSleeping()) {
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if (d11 > 1.0D) {
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