172 lines
5.7 KiB
Diff
172 lines
5.7 KiB
Diff
From f440565394b29fc10255bf6770adaead86eac9b7 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Tue, 14 Aug 2018 21:42:10 -0700
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Subject: [PATCH] Allow Blocks to be accessed via a long key
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The key can be retrieved via methods Location#toBlockKey() and
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Block#getBlockKey()
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World provides lookup for blocks by long key via method World#getBlockAtKey(long)
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The formatting for the key is as follows:
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10 bit y|27 bit z|27 bit x
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The y value is considered unsigned while z and x are considered two's complement
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Y range: [0, 1023]
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X, Z range: [-67 108 864, 67 108 863]
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diff --git a/src/main/java/org/bukkit/Location.java b/src/main/java/org/bukkit/Location.java
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index f87ecd0a..07e532cd 100644
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--- a/src/main/java/org/bukkit/Location.java
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+++ b/src/main/java/org/bukkit/Location.java
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@@ -15,7 +15,6 @@ import org.jetbrains.annotations.Nullable;
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// Paper start
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import java.util.Collection;
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-import java.util.Collections;
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import java.util.function.Predicate;
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import org.bukkit.entity.Entity;
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import org.bukkit.entity.LivingEntity;
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@@ -605,6 +604,17 @@ public class Location implements Cloneable, ConfigurationSerializable {
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blockLoc.setZ(getBlockZ());
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return blockLoc;
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}
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+
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+ // Paper Start
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+ /**
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+ * @return The block key for this location's block location.
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+ * @see Block#getBlockKey(int, int, int)
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+ */
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+ public long toBlockKey() {
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+ return Block.getBlockKey(getBlockX(), getBlockY(), getBlockZ());
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+ }
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+ // Paper End
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+
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/**
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* @return A new location where X/Y/Z are the center of the block
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*/
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diff --git a/src/main/java/org/bukkit/World.java b/src/main/java/org/bukkit/World.java
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index 310041ae..5bf2ba6f 100644
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--- a/src/main/java/org/bukkit/World.java
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+++ b/src/main/java/org/bukkit/World.java
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@@ -89,6 +89,38 @@ public interface World extends PluginMessageRecipient, Metadatable {
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@NotNull
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public Block getBlockAt(@NotNull Location location);
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+ // Paper start
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+ /**
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+ * Gets the {@link Block} at the given block key
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+ *
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+ * @param key The block key. See {@link Block#getBlockKey()}
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+ * @return Block at the key
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+ * @see Block#getBlockKey(int, int, int)
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+ */
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+ @NotNull
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+ public default Block getBlockAtKey(long key) {
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+ int x = Block.getBlockKeyX(key);
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+ int y = Block.getBlockKeyY(key);
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+ int z = Block.getBlockKeyZ(key);
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+ return getBlockAt(x, y, z);
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+ }
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+
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+ /**
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+ * Gets the {@link Location} at the given block key
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+ *
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+ * @param key The block key. See {@link Location#toBlockKey()}
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+ * @return Location at the key
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+ * @see Block#getBlockKey(int, int, int)
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+ */
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+ @NotNull
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+ public default Location getLocationAtKey(long key) {
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+ int x = Block.getBlockKeyX(key);
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+ int y = Block.getBlockKeyY(key);
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+ int z = Block.getBlockKeyZ(key);
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+ return new Location(this, x, y, z);
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+ }
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+ // Paper end
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+
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/**
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* Gets the highest non-empty (impassable) coordinate at the given
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* coordinates.
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diff --git a/src/main/java/org/bukkit/block/Block.java b/src/main/java/org/bukkit/block/Block.java
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index af4ffada..87185a81 100644
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--- a/src/main/java/org/bukkit/block/Block.java
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+++ b/src/main/java/org/bukkit/block/Block.java
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@@ -152,6 +152,72 @@ public interface Block extends Metadatable {
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*/
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int getZ();
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+ // Paper Start
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+ /**
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+ * Returns this block's coordinates packed into a long value.
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+ * Computed via: {@code Block.getBlockKey(this.getX(), this.getY(), this.getZ())}
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+ * @see Block#getBlockKey(int, int, int)
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+ * @return This block's x, y, and z coordinates packed into a long value
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+ */
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+ public default long getBlockKey() {
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+ return Block.getBlockKey(this.getX(), this.getY(), this.getZ());
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+ }
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+
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+ /**
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+ * Returns the specified block coordinates packed into a long value
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+ * <p>
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+ * The return value can be computed as follows:
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+ * <br>
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+ * {@code long value = ((long)x & 0x7FFFFFF) | (((long)z & 0x7FFFFFF) << 27) | ((long)y << 54);}
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+ * </p>
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+ *
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+ * <p>
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+ * And may be unpacked as follows:
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+ * <br>
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+ * {@code int x = (int) ((packed << 37) >> 37);}
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+ * <br>
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+ * {@code int y = (int) (packed >>> 54);}
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+ * <br>
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+ * {@code int z = (int) ((packed << 10) >> 37);}
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+ * </p>
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+ *
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+ * @return This block's x, y, and z coordinates packed into a long value
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+ */
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+ public static long getBlockKey(int x, int y, int z) {
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+ return ((long)x & 0x7FFFFFF) | (((long)z & 0x7FFFFFF) << 27) | ((long)y << 54);
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+ }
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+
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+ /**
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+ * Returns the x component from the packed value.
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+ * @param packed The packed value, as computed by {@link Block#getBlockKey(int, int, int)}
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+ * @see Block#getBlockKey(int, int, int)
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+ * @return The x component from the packed value.
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+ */
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+ public static int getBlockKeyX(long packed) {
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+ return (int) ((packed << 37) >> 37);
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+ }
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+
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+ /**
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+ * Returns the y component from the packed value.
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+ * @param packed The packed value, as computed by {@link Block#getBlockKey(int, int, int)}
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+ * @see Block#getBlockKey(int, int, int)
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+ * @return The y component from the packed value.
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+ */
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+ public static int getBlockKeyY(long packed) {
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+ return (int) (packed >>> 54);
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+ }
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+
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+ /**
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+ * Returns the z component from the packed value.
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+ * @param packed The packed value, as computed by {@link Block#getBlockKey(int, int, int)}
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+ * @see Block#getBlockKey(int, int, int)
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+ * @return The z component from the packed value.
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+ */
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+ public static int getBlockKeyZ(long packed) {
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+ return (int) ((packed << 10) >> 37);
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+ }
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+ // Paper End
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+
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/**
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* Gets the Location of the block
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*
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--
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2.25.0.windows.1
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