Updated Upstream (Bukkit/CraftBukkit/Spigot) (#9301)

patches/api/0296-Add-more-line-of-sight-methods.patch

@@ -0,0 +1,48 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: TwoLeggedCat <80929284+TwoLeggedCat@users.noreply.github.com>
+Date: Sat, 29 May 2021 14:33:18 -0500
+Subject: [PATCH] Add more line of sight methods
+
+
+diff --git a/src/main/java/org/bukkit/RegionAccessor.java b/src/main/java/org/bukkit/RegionAccessor.java
+index 71ef9b479888aa83455757560b60745572c7196d..cd83348de3f82b3fddcf2d4bb9187ec8173b0e40 100644
+--- a/src/main/java/org/bukkit/RegionAccessor.java
++++ b/src/main/java/org/bukkit/RegionAccessor.java
+@@ -437,5 +437,13 @@ public interface RegionAccessor extends Keyed { // Paper
+     @NotNull
+     @Override
+     NamespacedKey getKey();
++
++    /**
++     * Tell whether a line of sight exists between the given locations
++     * @param from Location to start at
++     * @param to target Location
++     * @return whether a line of sight exists between {@code from} and {@code to}
++     */
++    public boolean lineOfSightExists(@NotNull Location from, @NotNull Location to);
+     // Paper end
+ }
+diff --git a/src/main/java/org/bukkit/entity/LivingEntity.java b/src/main/java/org/bukkit/entity/LivingEntity.java
+index 6a4c54ea92478be6e53b62ebe4e73068b9ed4a29..626eb1796d5a19d110855e2fb95cb4c761ecc544 100644
+--- a/src/main/java/org/bukkit/entity/LivingEntity.java
++++ b/src/main/java/org/bukkit/entity/LivingEntity.java
+@@ -546,6 +546,19 @@ public interface LivingEntity extends Attributable, Damageable, ProjectileSource
+      */
+     public boolean hasLineOfSight(@NotNull Entity other);
+ 
++    // Paper start
++    /**
++     * Checks whether the living entity has block line of sight to the given block.
++     * <p>
++     * This uses the same algorithm that hostile mobs use to find the closest
++     * player.
++     *
++     * @param location the location to determine line of sight to
++     * @return true if there is a line of sight, false if not
++     */
++    public boolean hasLineOfSight(@NotNull Location location);
++    // Paper end
++
+     /**
+      * Returns if the living entity despawns when away from players or not.
+      * <p>