From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Mariell Hoversholm <proximyst@proximyst.com>
Date: Sat, 14 Nov 2020 16:48:37 +0100
Subject: [PATCH] Collision option for requiring a player participant


diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index 486e5438254348db68017228af131cba7defd637..3dd228ae8071a747f2cd7b2b46a2215183f72cd0 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -717,6 +717,18 @@ public class PaperWorldConfig {
         }
     }
 
+    public boolean onlyPlayersCollide = false;
+    public boolean allowVehicleCollisions = true;
+    private void onlyPlayersCollide() {
+        onlyPlayersCollide = getBoolean("only-players-collide", onlyPlayersCollide);
+        allowVehicleCollisions = getBoolean("allow-vehicle-collisions", allowVehicleCollisions);
+        if (onlyPlayersCollide && !allowVehicleCollisions) {
+            log("Collisions will only work if a player is one of the two entities colliding.");
+        } else if (onlyPlayersCollide) {
+            log("Collisions will only work if a player OR a vehicle is one of the two entities colliding.");
+        }
+    }
+
     public int wanderingTraderSpawnMinuteTicks = 1200;
     public int wanderingTraderSpawnDayTicks = 24000;
     public int wanderingTraderSpawnChanceFailureIncrement = 25;
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index ec98f5f59ca2b4cb58eb00ed8cdfa364f8bacd88..87c719caf796f54296ff7e412548062e02af270e 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -1465,6 +1465,7 @@ public abstract class Entity implements Nameable, CommandSource, net.minecraft.s
     public void push(Entity entity) {
         if (!this.isPassengerOfSameVehicle(entity)) {
             if (!entity.noPhysics && !this.noPhysics) {
+                if (this.level.paperConfig.onlyPlayersCollide && !(entity instanceof ServerPlayer || this instanceof ServerPlayer)) return; // Paper
                 double d0 = entity.getX() - this.getX();
                 double d1 = entity.getZ() - this.getZ();
                 double d2 = Mth.absMax(d0, d1);
diff --git a/src/main/java/net/minecraft/world/entity/vehicle/AbstractMinecart.java b/src/main/java/net/minecraft/world/entity/vehicle/AbstractMinecart.java
index 9cbde70787d8044f0edeb3d459231dd7fbb79584..25df3ef6b96bec39847a732394af8eccdb4d5d45 100644
--- a/src/main/java/net/minecraft/world/entity/vehicle/AbstractMinecart.java
+++ b/src/main/java/net/minecraft/world/entity/vehicle/AbstractMinecart.java
@@ -21,6 +21,7 @@ import net.minecraft.network.protocol.game.ClientboundAddEntityPacket;
 import net.minecraft.network.syncher.EntityDataAccessor;
 import net.minecraft.network.syncher.EntityDataSerializers;
 import net.minecraft.network.syncher.SynchedEntityData;
+import net.minecraft.server.level.ServerPlayer;
 import net.minecraft.tags.BlockTags;
 import net.minecraft.tags.Tag;
 import net.minecraft.util.Mth;
@@ -766,6 +767,7 @@ public abstract class AbstractMinecart extends Entity {
     public void push(Entity entity) {
         if (!this.level.isClientSide) {
             if (!entity.noPhysics && !this.noPhysics) {
+                if (!this.level.paperConfig.allowVehicleCollisions && this.level.paperConfig.onlyPlayersCollide && !(entity instanceof ServerPlayer)) return; // Paper
                 if (!this.hasPassenger(entity)) {
                     // CraftBukkit start
                     VehicleEntityCollisionEvent collisionEvent = new VehicleEntityCollisionEvent((Vehicle) this.getBukkitEntity(), entity.getBukkitEntity());
diff --git a/src/main/java/net/minecraft/world/entity/vehicle/Boat.java b/src/main/java/net/minecraft/world/entity/vehicle/Boat.java
index 6a9c18540886979b2212bf7917a21753c9a9db3c..e7ac3bff190c899397d6576fabbf4966878ea7e5 100644
--- a/src/main/java/net/minecraft/world/entity/vehicle/Boat.java
+++ b/src/main/java/net/minecraft/world/entity/vehicle/Boat.java
@@ -14,6 +14,7 @@ import net.minecraft.network.protocol.game.ServerboundPaddleBoatPacket;
 import net.minecraft.network.syncher.EntityDataAccessor;
 import net.minecraft.network.syncher.EntityDataSerializers;
 import net.minecraft.network.syncher.SynchedEntityData;
+import net.minecraft.server.level.ServerPlayer;
 import net.minecraft.sounds.SoundEvent;
 import net.minecraft.sounds.SoundEvents;
 import net.minecraft.tags.FluidTags;
@@ -229,6 +230,7 @@ public class Boat extends Entity {
 
     @Override
     public void push(Entity entity) {
+        if (!this.level.paperConfig.allowVehicleCollisions && this.level.paperConfig.onlyPlayersCollide && !(entity instanceof ServerPlayer)) return; // Paper
         if (entity instanceof Boat) {
             if (entity.getBoundingBox().minY < this.getBoundingBox().maxY) {
                 // CraftBukkit start