Update upstream(Luminol-lithium-sleeping-block-entity)

lophine-server/src/main/java/com/logisticscraft/occlusionculling/util/Vec3d.java

@@ -0,0 +1,87 @@
+package com.logisticscraft.occlusionculling.util;
+
+public class Vec3d {
+
+    public double x;
+    public double y;
+    public double z;
+
+    public Vec3d(double x, double y, double z) {
+        this.x = x;
+        this.y = y;
+        this.z = z;
+    }
+
+    public double getX() {
+        return x;
+    }
+
+    public double getY() {
+        return y;
+    }
+
+    public double getZ() {
+        return z;
+    }
+
+    public void set(double x, double y, double z) {
+        this.x = x;
+        this.y = y;
+        this.z = z;
+    }
+
+    public void setAdd(Vec3d vec, double x, double y, double z) {
+        this.x = vec.x + x;
+        this.y = vec.y + y;
+        this.z = vec.z + z;
+    }
+
+    public Vec3d div(Vec3d rayDir) {
+        this.x /= rayDir.x;
+        this.z /= rayDir.z;
+        this.y /= rayDir.y;
+        return this;
+    }
+
+    public Vec3d normalize() {
+        double mag = Math.sqrt(x * x + y * y + z * z);
+        this.x /= mag;
+        this.y /= mag;
+        this.z /= mag;
+        return this;
+    }
+
+    public boolean equals(Object other) {
+        if (this == other) {
+            return true;
+        }
+        if (!(other instanceof Vec3d)) {
+            return false;
+        }
+        Vec3d vec3d = (Vec3d) other;
+        if (Double.compare(vec3d.x, x) != 0) {
+            return false;
+        }
+        if (Double.compare(vec3d.y, y) != 0) {
+            return false;
+        }
+        return Double.compare(vec3d.z, z) == 0;
+    }
+
+    @Override
+    public int hashCode() {
+        long l = Double.doubleToLongBits(x);
+        int i = (int) (l ^ l >>> 32);
+        l = Double.doubleToLongBits(y);
+        i = 31 * i + (int) (l ^ l >>> 32);
+        l = Double.doubleToLongBits(z);
+        i = 31 * i + (int) (l ^ l >>> 32);
+        return i;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + x + ", " + y + ", " + z + ")";
+    }
+
+}