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Paper/Spigot-Server-Patches/0323-Make-portal-teleportation-adjustment-math-more-accur.patch

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From 505af35b52f62cdda8013adee6a920ce82b2b5d4 Mon Sep 17 00:00:00 2001
From: Zach Brown <zach.brown@destroystokyo.com>
Date: Tue, 31 Jul 2018 19:32:57 -0500
Subject: [PATCH] Make portal teleportation adjustment math more accurate
diff --git a/src/main/java/net/minecraft/server/EnumDirection.java b/src/main/java/net/minecraft/server/EnumDirection.java
index c0853f0fcd..7aa940672e 100644
--- a/src/main/java/net/minecraft/server/EnumDirection.java
+++ b/src/main/java/net/minecraft/server/EnumDirection.java
@@ -95,6 +95,7 @@ public enum EnumDirection implements INamable {
return this.i;
}
+ public final EnumDirection.EnumAxisDirection getAxisDirection() { return c(); } // Paper - OBFHELPER
public EnumDirection.EnumAxisDirection c() {
return this.l;
}
@@ -103,6 +104,7 @@ public enum EnumDirection implements INamable {
return fromType1(this.h);
}
+ public final EnumDirection rotateY() { return e(); } // Paper - OBFHELPER
public EnumDirection e() {
switch(this) {
case NORTH:
@@ -333,6 +335,7 @@ public enum EnumDirection implements INamable {
this.d = s1;
}
+ public final int getOffset() { return a(); } // Paper - OBFHELPER
public int a() {
return this.c;
}
diff --git a/src/main/java/net/minecraft/server/MathHelper.java b/src/main/java/net/minecraft/server/MathHelper.java
index d53d0c2422..49fba0979e 100644
--- a/src/main/java/net/minecraft/server/MathHelper.java
+++ b/src/main/java/net/minecraft/server/MathHelper.java
@@ -83,6 +83,7 @@ public class MathHelper {
}
}
+ public static double clamp(double d0, double d1, double d2) { return a(d0, d1, d2); } // Paper - OBFHELPER
public static double a(double d0, double d1, double d2) {
if (d0 < d1) {
return d1;
diff --git a/src/main/java/net/minecraft/server/PortalTravelAgent.java b/src/main/java/net/minecraft/server/PortalTravelAgent.java
index 20f2a9197c..fd372103be 100644
--- a/src/main/java/net/minecraft/server/PortalTravelAgent.java
+++ b/src/main/java/net/minecraft/server/PortalTravelAgent.java
@@ -208,11 +208,27 @@ public class PortalTravelAgent {
++d4;
}
+ // Paper start - Prevent portal suffocation (and therefore getting teleported up in an attempt to avoid it)
+ // Based on work by CarpetMod - Licensed GPL-3.0
+ double offset = (1.0D - entity.getPortalOffset().x) * (double) shapedetector_shapedetectorcollection.getWidth() * (double) shapedetector_shapedetectorcollection.getFacing().rotateY().getAxisDirection().getOffset();
+ double adjustedRadius = 1.02 * entity.width / 2;
+ if (adjustedRadius >= shapedetector_shapedetectorcollection.getWidth() - adjustedRadius) {
+ // entity wider than portal, place it in the middle
+ adjustedRadius = (double) shapedetector_shapedetectorcollection.getWidth() / 2 - 0.001;
+ }
+
+ if (offset >= 0) {
+ offset = MathHelper.clamp(offset, adjustedRadius, (double) shapedetector_shapedetectorcollection.getWidth() - adjustedRadius);
+ } else {
+ offset = MathHelper.clamp(offset, (double) -shapedetector_shapedetectorcollection.getWidth() + adjustedRadius, -adjustedRadius);
+ }
+
if (shapedetector_shapedetectorcollection.getFacing().k() == EnumDirection.EnumAxis.X) {
- d3 = d4 + (1.0D - entity.getPortalOffset().x) * (double) shapedetector_shapedetectorcollection.d() * (double) shapedetector_shapedetectorcollection.getFacing().e().c().a();
+ d3 = d4 + offset;
} else {
- d2 = d4 + (1.0D - entity.getPortalOffset().x) * (double) shapedetector_shapedetectorcollection.d() * (double) shapedetector_shapedetectorcollection.getFacing().e().c().a();
+ d2 = d4 + offset;
}
+ // Paper end
float f1 = 0.0F;
float f2 = 0.0F;
diff --git a/src/main/java/net/minecraft/server/ShapeDetector.java b/src/main/java/net/minecraft/server/ShapeDetector.java
index 0c9910d9a5..446cdb86d8 100644
--- a/src/main/java/net/minecraft/server/ShapeDetector.java
+++ b/src/main/java/net/minecraft/server/ShapeDetector.java
@@ -143,6 +143,7 @@ public class ShapeDetector {
return this.c;
}
+ public final int getWidth() { return this.d(); } // Paper - OBFHELPER
public int d() {
return this.e;
}
--
2.18.0