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diff --git a/contexts/data/lib/closure-library/closure/goog/math/vec3.js b/contexts/data/lib/closure-library/closure/goog/math/vec3.js
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index 4fa895e..0000000
--- a/contexts/data/lib/closure-library/closure/goog/math/vec3.js
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@@ -1,308 +0,0 @@
-// Copyright 2008 The Closure Library Authors. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS-IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-/**
- * @fileoverview Defines a 3-element vector class that can be used for
- * coordinate math, useful for animation systems and point manipulation.
- *
- * Based heavily on code originally by:
- */
-
-
-goog.provide('goog.math.Vec3');
-
-goog.require('goog.math');
-goog.require('goog.math.Coordinate3');
-
-
-
-/**
- * Class for a three-dimensional vector object and assorted functions useful for
- * manipulation.
- *
- * Inherits from goog.math.Coordinate3 so that a Vec3 may be passed in to any
- * function that requires a Coordinate.
- *
- * @param {number} x The x value for the vector.
- * @param {number} y The y value for the vector.
- * @param {number} z The z value for the vector.
- * @constructor
- * @extends {goog.math.Coordinate3}
- */
-goog.math.Vec3 = function(x, y, z) {
-  /**
-   * X-value
-   * @type {number}
-   */
-  this.x = x;
-
-  /**
-   * Y-value
-   * @type {number}
-   */
-  this.y = y;
-
-  /**
-   * Z-value
-   * @type {number}
-   */
-  this.z = z;
-};
-goog.inherits(goog.math.Vec3, goog.math.Coordinate3);
-
-
-/**
- * Generates a random unit vector.
- *
- * http://mathworld.wolfram.com/SpherePointPicking.html
- * Using (6), (7), and (8) to generate coordinates.
- * @return {!goog.math.Vec3} A random unit-length vector.
- */
-goog.math.Vec3.randomUnit = function() {
-  var theta = Math.random() * Math.PI * 2;
-  var phi = Math.random() * Math.PI * 2;
-
-  var z = Math.cos(phi);
-  var x = Math.sqrt(1 - z * z) * Math.cos(theta);
-  var y = Math.sqrt(1 - z * z) * Math.sin(theta);
-
-  return new goog.math.Vec3(x, y, z);
-};
-
-
-/**
- * Generates a random vector inside the unit sphere.
- *
- * @return {!goog.math.Vec3} A random vector.
- */
-goog.math.Vec3.random = function() {
-  return goog.math.Vec3.randomUnit().scale(Math.random());
-};
-
-
-/**
- * Returns a new Vec3 object from a given coordinate.
- *
- * @param {goog.math.Coordinate3} a The coordinate.
- * @return {!goog.math.Vec3} A new vector object.
- */
-goog.math.Vec3.fromCoordinate3 = function(a) {
-  return new goog.math.Vec3(a.x, a.y, a.z);
-};
-
-
-/**
- * Creates a new copy of this Vec3.
- *
- * @return {!goog.math.Vec3} A new vector with the same coordinates as this one.
- * @override
- */
-goog.math.Vec3.prototype.clone = function() {
-  return new goog.math.Vec3(this.x, this.y, this.z);
-};
-
-
-/**
- * Returns the magnitude of the vector measured from the origin.
- *
- * @return {number} The length of the vector.
- */
-goog.math.Vec3.prototype.magnitude = function() {
-  return Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z);
-};
-
-
-/**
- * Returns the squared magnitude of the vector measured from the origin.
- * NOTE(brenneman): Leaving out the square root is not a significant
- * optimization in JavaScript.
- *
- * @return {number} The length of the vector, squared.
- */
-goog.math.Vec3.prototype.squaredMagnitude = function() {
-  return this.x * this.x + this.y * this.y + this.z * this.z;
-};
-
-
-/**
- * Scales the current vector by a constant.
- *
- * @param {number} s The scale factor.
- * @return {!goog.math.Vec3} This vector, scaled.
- */
-goog.math.Vec3.prototype.scale = function(s) {
-  this.x *= s;
-  this.y *= s;
-  this.z *= s;
-  return this;
-};
-
-
-/**
- * Reverses the sign of the vector. Equivalent to scaling the vector by -1.
- *
- * @return {!goog.math.Vec3} This vector, inverted.
- */
-goog.math.Vec3.prototype.invert = function() {
-  this.x = -this.x;
-  this.y = -this.y;
-  this.z = -this.z;
-  return this;
-};
-
-
-/**
- * Normalizes the current vector to have a magnitude of 1.
- *
- * @return {!goog.math.Vec3} This vector, normalized.
- */
-goog.math.Vec3.prototype.normalize = function() {
-  return this.scale(1 / this.magnitude());
-};
-
-
-/**
- * Adds another vector to this vector in-place.
- *
- * @param {goog.math.Vec3} b The vector to add.
- * @return {!goog.math.Vec3} This vector with {@code b} added.
- */
-goog.math.Vec3.prototype.add = function(b) {
-  this.x += b.x;
-  this.y += b.y;
-  this.z += b.z;
-  return this;
-};
-
-
-/**
- * Subtracts another vector from this vector in-place.
- *
- * @param {goog.math.Vec3} b The vector to subtract.
- * @return {!goog.math.Vec3} This vector with {@code b} subtracted.
- */
-goog.math.Vec3.prototype.subtract = function(b) {
-  this.x -= b.x;
-  this.y -= b.y;
-  this.z -= b.z;
-  return this;
-};
-
-
-/**
- * Compares this vector with another for equality.
- *
- * @param {goog.math.Vec3} b The other vector.
- * @return {boolean} True if this vector's x, y and z equal the given vector's
- *     x, y, and z, respectively.
- */
-goog.math.Vec3.prototype.equals = function(b) {
-  return this == b || !!b && this.x == b.x && this.y == b.y && this.z == b.z;
-};
-
-
-/**
- * Returns the distance between two vectors.
- *
- * @param {goog.math.Vec3} a The first vector.
- * @param {goog.math.Vec3} b The second vector.
- * @return {number} The distance.
- */
-goog.math.Vec3.distance = goog.math.Coordinate3.distance;
-
-
-/**
- * Returns the squared distance between two vectors.
- *
- * @param {goog.math.Vec3} a The first vector.
- * @param {goog.math.Vec3} b The second vector.
- * @return {number} The squared distance.
- */
-goog.math.Vec3.squaredDistance = goog.math.Coordinate3.squaredDistance;
-
-
-/**
- * Compares vectors for equality.
- *
- * @param {goog.math.Vec3} a The first vector.
- * @param {goog.math.Vec3} b The second vector.
- * @return {boolean} True if the vectors have equal x, y, and z coordinates.
- */
-goog.math.Vec3.equals = goog.math.Coordinate3.equals;
-
-
-/**
- * Returns the sum of two vectors as a new Vec3.
- *
- * @param {goog.math.Vec3} a The first vector.
- * @param {goog.math.Vec3} b The second vector.
- * @return {!goog.math.Vec3} The sum vector.
- */
-goog.math.Vec3.sum = function(a, b) {
-  return new goog.math.Vec3(a.x + b.x, a.y + b.y, a.z + b.z);
-};
-
-
-/**
- * Returns the difference of two vectors as a new Vec3.
- *
- * @param {goog.math.Vec3} a The first vector.
- * @param {goog.math.Vec3} b The second vector.
- * @return {!goog.math.Vec3} The difference vector.
- */
-goog.math.Vec3.difference = function(a, b) {
-  return new goog.math.Vec3(a.x - b.x, a.y - b.y, a.z - b.z);
-};
-
-
-/**
- * Returns the dot-product of two vectors.
- *
- * @param {goog.math.Vec3} a The first vector.
- * @param {goog.math.Vec3} b The second vector.
- * @return {number} The dot-product of the two vectors.
- */
-goog.math.Vec3.dot = function(a, b) {
-  return a.x * b.x + a.y * b.y + a.z * b.z;
-};
-
-
-/**
- * Returns the cross-product of two vectors.
- *
- * @param {goog.math.Vec3} a The first vector.
- * @param {goog.math.Vec3} b The second vector.
- * @return {!goog.math.Vec3} The cross-product of the two vectors.
- */
-goog.math.Vec3.cross = function(a, b) {
-  return new goog.math.Vec3(a.y * b.z - a.z * b.y,
-                            a.z * b.x - a.x * b.z,
-                            a.x * b.y - a.y * b.x);
-};
-
-
-/**
- * Returns a new Vec3 that is the linear interpolant between vectors a and b at
- * scale-value x.
- *
- * @param {goog.math.Vec3} a Vector a.
- * @param {goog.math.Vec3} b Vector b.
- * @param {number} x The proportion between a and b.
- * @return {!goog.math.Vec3} The interpolated vector.
- */
-goog.math.Vec3.lerp = function(a, b, x) {
-  return new goog.math.Vec3(goog.math.lerp(a.x, b.x, x),
-                            goog.math.lerp(a.y, b.y, x),
-                            goog.math.lerp(a.z, b.z, x));
-};