From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: jellysquid3 <jellysquid3@users.noreply.github.com>
Date: Sat, 1 Jan 2022 03:59:58 -0500
Subject: [PATCH] lithium: precompute shape arrays

Original code by CaffeineMC, licensed under GNU Lesser General Public License v3.0
You can find the original code on https://github.com/CaffeineMC/lithium-fabric (Yarn mappings)

diff --git a/src/main/java/net/minecraft/core/Direction.java b/src/main/java/net/minecraft/core/Direction.java
index 2217968eb5ecac0a2063cf1eae7d754d760e9f28..445f21c3764d148de937f558e3f087ae2006733d 100644
--- a/src/main/java/net/minecraft/core/Direction.java
+++ b/src/main/java/net/minecraft/core/Direction.java
@@ -41,7 +41,7 @@ public enum Direction implements StringRepresentable {
     private final Direction.Axis axis;
     private final Direction.AxisDirection axisDirection;
     private final Vec3i normal;
-    private static final Direction[] VALUES = values();
+    public static final Direction[] VALUES = values(); // JettPack
     private static final Direction[] BY_3D_DATA = Arrays.stream(VALUES).sorted(Comparator.comparingInt((direction) -> {
         return direction.data3d;
     })).toArray((i) -> {
diff --git a/src/main/java/net/minecraft/world/phys/shapes/CubePointRange.java b/src/main/java/net/minecraft/world/phys/shapes/CubePointRange.java
index a544db042c8d2ecec8d323770552c4f10ca758a6..c04da8da5b40430b61972bce32cec4e8c0370bac 100644
--- a/src/main/java/net/minecraft/world/phys/shapes/CubePointRange.java
+++ b/src/main/java/net/minecraft/world/phys/shapes/CubePointRange.java
@@ -4,6 +4,7 @@ import it.unimi.dsi.fastutil.doubles.AbstractDoubleList;
 
 public class CubePointRange extends AbstractDoubleList {
     private final int parts;
+    private double scale; // JettPack - lithium: shapes.precompute_shape_arrays
 
     CubePointRange(int sectionCount) {
         if (sectionCount <= 0) {
@@ -11,10 +12,11 @@ public class CubePointRange extends AbstractDoubleList {
         } else {
             this.parts = sectionCount;
         }
+        this.scale = 1.0D / sectionCount; // JettPack - lithium: shapes.precompute_shape_arrays
     }
 
     public double getDouble(int i) {
-        return (double)i / (double)this.parts;
+        return i * this.scale; // JettPack - lithium: shapes.precompute_shape_arrays
     }
 
     public int size() {
diff --git a/src/main/java/net/minecraft/world/phys/shapes/CubeVoxelShape.java b/src/main/java/net/minecraft/world/phys/shapes/CubeVoxelShape.java
index 68e89dbd79171627046e89699057964e44c40e7d..959588962acb0196ec9f1cc2502e62117f6ccdc4 100644
--- a/src/main/java/net/minecraft/world/phys/shapes/CubeVoxelShape.java
+++ b/src/main/java/net/minecraft/world/phys/shapes/CubeVoxelShape.java
@@ -3,15 +3,25 @@ package net.minecraft.world.phys.shapes;
 import it.unimi.dsi.fastutil.doubles.DoubleList;
 import net.minecraft.core.Direction;
 import net.minecraft.util.Mth;
+import net.minecraft.world.phys.shapes.CubePointRange; // JettPack
 
 public final class CubeVoxelShape extends VoxelShape {
+    private DoubleList[] list; // JettPack - lithium: shapes.precompute_shape_arrays
+
     protected CubeVoxelShape(DiscreteVoxelShape voxels) {
         super(voxels);
+        // JettPack start - lithium: shapes.precompute_shape_arrays
+        this.list = new DoubleList[Direction.VALUES.length];
+
+        for (Direction.Axis axis : Direction.Axis.VALUES) {
+            this.list[axis.ordinal()] = new CubePointRange(voxels.getSize(axis));
+        }
+        // JettPack end
     }
 
     @Override
     protected DoubleList getCoords(Direction.Axis axis) {
-        return new CubePointRange(this.shape.getSize(axis));
+        return this.list[axis.ordinal()]; // JettPack - lithium: shapes.precompute_shape_arrays
     }
 
     @Override