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- // 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.
- goog.provide('goog.math.Vec3Test');
- goog.setTestOnly('goog.math.Vec3Test');
- goog.require('goog.math.Coordinate3');
- goog.require('goog.math.Vec3');
- goog.require('goog.testing.jsunit');
- function assertVec3Equals(a, b) {
- assertTrue(b + ' should be equal to ' + a, goog.math.Vec3.equals(a, b));
- }
- function testVec3() {
- var v = new goog.math.Vec3(3.14, 2.78, -7.21);
- assertEquals(3.14, v.x);
- assertEquals(2.78, v.y);
- assertEquals(-7.21, v.z);
- }
- function testRandomUnit() {
- var a = goog.math.Vec3.randomUnit();
- assertRoughlyEquals(1.0, a.magnitude(), 1e-10);
- }
- function testRandom() {
- var a = goog.math.Vec3.random();
- assertTrue(a.magnitude() <= 1.0);
- }
- function testFromCoordinate3() {
- var a = new goog.math.Coordinate3(-2, 10, 4);
- var b = goog.math.Vec3.fromCoordinate3(a);
- assertEquals(-2, b.x);
- assertEquals(10, b.y);
- assertEquals(4, b.z);
- }
- function testClone() {
- var a = new goog.math.Vec3(1, 2, 5);
- var b = a.clone();
- assertEquals(a.x, b.x);
- assertEquals(a.y, b.y);
- assertEquals(a.z, b.z);
- }
- function testMagnitude() {
- var a = new goog.math.Vec3(0, 10, 0);
- var b = new goog.math.Vec3(3, 4, 5);
- var c = new goog.math.Vec3(-4, 3, 8);
- assertEquals(10, a.magnitude());
- assertEquals(Math.sqrt(50), b.magnitude());
- assertEquals(Math.sqrt(89), c.magnitude());
- }
- function testSquaredMagnitude() {
- var a = new goog.math.Vec3(-3, -4, -5);
- assertEquals(50, a.squaredMagnitude());
- }
- function testScale() {
- var a = new goog.math.Vec3(1, 2, 3);
- a.scale(0.5);
- assertEquals(0.5, a.x);
- assertEquals(1, a.y);
- assertEquals(1.5, a.z);
- }
- function testInvert() {
- var a = new goog.math.Vec3(3, 4, 5);
- a.invert();
- assertEquals(-3, a.x);
- assertEquals(-4, a.y);
- assertEquals(-5, a.z);
- }
- function testNormalize() {
- var a = new goog.math.Vec3(5, 5, 5);
- a.normalize();
- assertRoughlyEquals(1.0, a.magnitude(), 1e-10);
- }
- function testAdd() {
- var a = new goog.math.Vec3(1, -1, 7);
- a.add(new goog.math.Vec3(3, 3, 3));
- assertVec3Equals(new goog.math.Vec3(4, 2, 10), a);
- }
- function testSubtract() {
- var a = new goog.math.Vec3(1, -1, 4);
- a.subtract(new goog.math.Vec3(3, 3, 3));
- assertVec3Equals(new goog.math.Vec3(-2, -4, 1), a);
- }
- function testEquals() {
- var a = new goog.math.Vec3(1, 2, 5);
- assertFalse(a.equals(null));
- assertFalse(a.equals(new goog.math.Vec3(1, 3, 5)));
- assertFalse(a.equals(new goog.math.Vec3(2, 2, 2)));
- assertTrue(a.equals(a));
- assertTrue(a.equals(new goog.math.Vec3(1, 2, 5)));
- }
- function testSum() {
- var a = new goog.math.Vec3(0.5, 0.25, 1.2);
- var b = new goog.math.Vec3(0.5, 0.75, -0.6);
- var c = goog.math.Vec3.sum(a, b);
- assertVec3Equals(new goog.math.Vec3(1, 1, 0.6), c);
- }
- function testDifference() {
- var a = new goog.math.Vec3(0.5, 0.25, 3);
- var b = new goog.math.Vec3(0.5, 0.75, 5);
- var c = goog.math.Vec3.difference(a, b);
- assertVec3Equals(new goog.math.Vec3(0, -0.5, -2), c);
- }
- function testDistance() {
- var a = new goog.math.Vec3(3, 4, 5);
- var b = new goog.math.Vec3(-3, -4, 5);
- assertEquals(10, goog.math.Vec3.distance(a, b));
- }
- function testSquaredDistance() {
- var a = new goog.math.Vec3(3, 4, 5);
- var b = new goog.math.Vec3(-3, -4, 5);
- assertEquals(100, goog.math.Vec3.squaredDistance(a, b));
- }
- function testVec3Equals() {
- assertTrue(goog.math.Vec3.equals(null, null, null));
- assertFalse(goog.math.Vec3.equals(null, new goog.math.Vec3()));
- var a = new goog.math.Vec3(1, 3, 5);
- assertTrue(goog.math.Vec3.equals(a, a));
- assertTrue(goog.math.Vec3.equals(a, new goog.math.Vec3(1, 3, 5)));
- assertFalse(goog.math.Vec3.equals(1, new goog.math.Vec3(3, 1, 5)));
- }
- function testDot() {
- var a = new goog.math.Vec3(0, 5, 2);
- var b = new goog.math.Vec3(3, 0, 5);
- assertEquals(10, goog.math.Vec3.dot(a, b));
- var c = new goog.math.Vec3(-5, -5, 5);
- var d = new goog.math.Vec3(0, 7, -2);
- assertEquals(-45, goog.math.Vec3.dot(c, d));
- }
- function testCross() {
- var a = new goog.math.Vec3(3, 0, 0);
- var b = new goog.math.Vec3(0, 2, 0);
- assertVec3Equals(new goog.math.Vec3(0, 0, 6), goog.math.Vec3.cross(a, b));
- var c = new goog.math.Vec3(1, 2, 3);
- var d = new goog.math.Vec3(4, 5, 6);
- assertVec3Equals(new goog.math.Vec3(-3, 6, -3), goog.math.Vec3.cross(c, d));
- }
- function testLerp() {
- var a = new goog.math.Vec3(0, 0, 0);
- var b = new goog.math.Vec3(10, 10, 10);
- for (var i = 0; i <= 10; i++) {
- var c = goog.math.Vec3.lerp(a, b, i / 10);
- assertEquals(i, c.x);
- assertEquals(i, c.y);
- assertEquals(i, c.z);
- }
- }
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