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Use saner Entity bounding box limits

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CB only protected from > 64 but there's no reason an entity should ever
be more than 2x its width or 1x height as the BB is supposed to represent
the entity size.

BB is / 2 to calculate position.
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Aikar 2020-05-22 00:40:56 -04:00
parent edd6b6a2ba
commit 281181c7c7
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@ -0,0 +1,67 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Fri, 22 May 2020 00:29:52 -0400
Subject: [PATCH] Use saner Entity bounding box limits
CB only protected from > 64 but there's no reason an entity should ever
be more than 2x its width or 1x height as the BB is supposed to represent
the entity size.
BB is / 2 to calculate position.
diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index e0ab058bf947ea10b37eadf6122292e708bd3809..76fcde33416995ef46693b75dc4484e13d3daf1f 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -2991,18 +2991,45 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
maxX = axisalignedbb.maxX,
maxY = axisalignedbb.maxY,
maxZ = axisalignedbb.maxZ;
+ // Paper start - use saner max's for bounding box
+ boolean illegal = false;
+ double maxW = this.getWidth() * 2;
+ double maxH = this.getHeight();
double len = axisalignedbb.maxX - axisalignedbb.minX;
- if (len < 0) maxX = minX;
- if (len > 64) maxX = minX + 64.0;
+ if (len < 0) {
+ maxX = minX;
+ illegal = true;
+ }
+ if (len > maxW+1.0E-7D) {
+ maxX = minX + maxW;
+ illegal = true;
+ }
len = axisalignedbb.maxY - axisalignedbb.minY;
- if (len < 0) maxY = minY;
- if (len > 64) maxY = minY + 64.0;
+ if (len < 0) {
+ maxY = minY;
+ illegal = true;
+ }
+ if (len > maxH+1.0E-7D) {
+ maxY = minY + maxH;
+ illegal = true;
+ }
len = axisalignedbb.maxZ - axisalignedbb.minZ;
- if (len < 0) maxZ = minZ;
- if (len > 64) maxZ = minZ + 64.0;
+ if (len < 0) {
+ maxZ = minZ;
+ illegal = true;
+ }
+ if (len > maxW+1.0E-7D) {
+ maxZ = minZ + maxW;
+ illegal = true;
+ }
+
this.boundingBox = new AxisAlignedBB(minX, minY, minZ, maxX, maxY, maxZ);
+ if (illegal) {
+ new Throwable("Illegal Entity bounding box attempt on (" + this + ") - tried: " + axisalignedbb + " - using: " + boundingBox).printStackTrace();
+ }
+ // Paper end
// CraftBukkit end
}