/**
* @license
* Copyright The Closure Library Authors.
* SPDX-License-Identifier: Apache-2.0
*/
goog.module('goog.vec.Vec2Test');
goog.setTestOnly();
const Vec2 = goog.require('goog.vec.Vec2');
const testSuite = goog.require('goog.testing.testSuite');
const vec = goog.require('goog.vec');
testSuite({
/** @suppress {checkTypes} suppression added to enable type checking */
testConstructor() {
const v = Vec2.createFloat32();
assertElementsEquals(0, v[0]);
assertEquals(0, v[1]);
assertElementsEquals([0, 0], Vec2.createFloat32());
Vec2.setFromValues(v, 1, 2);
assertElementsEquals([1, 2], v);
const w = Vec2.createFloat64();
assertElementsEquals(0, w[0]);
assertEquals(0, w[1]);
assertElementsEquals([0, 0], Vec2.createFloat64());
Vec2.setFromValues(w, 1, 2);
assertElementsEquals([1, 2], w);
},
testSet() {
const v = Vec2.createFloat32();
Vec2.setFromValues(v, 1, 2);
assertElementsEquals([1, 2], v);
Vec2.setFromArray(v, [4, 5]);
assertElementsEquals([4, 5], v);
const w = Vec2.createFloat32();
Vec2.setFromValues(w, 1, 2);
assertElementsEquals([1, 2], w);
Vec2.setFromArray(w, [4, 5]);
assertElementsEquals([4, 5], w);
},
testAdd() {
const v0 = Vec2.createFloat32FromArray([1, 2]);
const v1 = Vec2.createFloat32FromArray([4, 5]);
const v2 = Vec2.cloneFloat32(v0);
Vec2.add(v2, v1, v2);
assertElementsEquals([1, 2], v0);
assertElementsEquals([4, 5], v1);
assertElementsEquals([5, 7], v2);
Vec2.add(Vec2.add(v0, v1, v2), v0, v2);
assertElementsEquals([6, 9], v2);
},
/** @suppress {checkTypes} suppression added to enable type checking */
testSubtract() {
const v0 = Vec2.createFloat32FromArray([1, 2]);
const v1 = Vec2.createFloat32FromArray([4, 5]);
let v2 = Vec2.cloneFloat32(v0);
Vec2.subtract(v2, v1, v2);
assertElementsEquals([1, 2], v0);
assertElementsEquals([4, 5], v1);
assertElementsEquals([-3, -3], v2);
Vec2.setFromValues(v2, 0, 0, 0);
Vec2.subtract(v1, v0, v2);
assertElementsEquals([3, 3], v2);
v2 = Vec2.cloneFloat32(v0);
Vec2.subtract(v2, v1, v2);
assertElementsEquals([-3, -3], v2);
Vec2.subtract(Vec2.subtract(v1, v0, v2), v0, v2);
assertElementsEquals([2, 1], v2);
},
testNegate() {
const v0 = Vec2.createFloat32FromArray([1, 2]);
const v1 = Vec2.createFloat32();
Vec2.negate(v0, v1);
assertElementsEquals([-1, -2], v1);
assertElementsEquals([1, 2], v0);
Vec2.negate(v0, v0);
assertElementsEquals([-1, -2], v0);
},
testAbs() {
const v0 = Vec2.createFloat32FromValues(-1, -2);
const v1 = Vec2.createFloat32();
Vec2.abs(v0, v1);
assertElementsEquals([1, 2], v1);
assertElementsEquals([-1, -2], v0);
Vec2.abs(v0, v0);
assertElementsEquals([1, 2], v0);
},
testScale() {
const v0 = Vec2.createFloat32FromArray([1, 2]);
const v1 = Vec2.createFloat32();
Vec2.scale(v0, 4, v1);
assertElementsEquals([4, 8], v1);
assertElementsEquals([1, 2], v0);
Vec2.setFromArray(v1, v0);
Vec2.scale(v1, 5, v1);
assertElementsEquals([5, 10], v1);
},
testMagnitudeSquared() {
const v0 = Vec2.createFloat32FromArray([1, 2]);
assertEquals(5, Vec2.magnitudeSquared(v0));
},
testMagnitude() {
const v0 = Vec2.createFloat32FromArray([1, 2]);
assertEquals(Math.sqrt(5), Vec2.magnitude(v0));
const v1 = Vec2.createFloat32FromArray([0, 0]);
assertEquals(0, Vec2.magnitude(v1));
},
testMagnitudeOverflow() {
const x = Number.MAX_VALUE / 2;
assertEquals(
(Number.MAX_VALUE / 2) * Math.sqrt(2),
Vec2.magnitude(Vec2.createFloat64FromArray([x, x])));
},
testNormalize() {
const v0 = Vec2.createFloat32FromArray([2, 3]);
const v1 = Vec2.createFloat32();
const v2 = Vec2.createFloat32();
Vec2.scale(v0, 1 / Vec2.magnitude(v0), v2);
Vec2.normalize(v0, v1);
assertElementsEquals(v2, v1);
assertElementsEquals([2, 3], v0);
Vec2.setFromArray(v1, v0);
Vec2.normalize(v1, v1);
assertElementsEquals(v2, v1);
},
testDot() {
const v0 = Vec2.createFloat32FromArray([1, 2]);
const v1 = Vec2.createFloat32FromArray([4, 5]);
assertEquals(14, Vec2.dot(v0, v1));
assertEquals(14, Vec2.dot(v1, v0));
},
testDistanceSquared() {
const v0 = Vec2.createFloat32FromValues(1, 2);
const v1 = Vec2.createFloat32FromValues(1, 2);
assertEquals(0, Vec2.distanceSquared(v0, v1));
Vec2.setFromValues(v0, 1, 2);
Vec2.setFromValues(v1, -1, -2);
assertEquals(20, Vec2.distanceSquared(v0, v1));
},
testDistance() {
const v0 = Vec2.createFloat32FromValues(1, 2);
const v1 = Vec2.createFloat32FromValues(1, 2);
assertEquals(0, Vec2.distance(v0, v1));
Vec2.setFromValues(v0, 2, 3);
Vec2.setFromValues(v1, -2, 0);
assertEquals(5, Vec2.distance(v0, v1));
},
testDirection() {
const v0 = Vec2.createFloat32FromValues(1, 2);
const v1 = Vec2.createFloat32FromValues(1, 2);
const dirVec = Vec2.createFloat32FromValues(4, 5);
Vec2.direction(v0, v1, dirVec);
assertElementsEquals([0, 0], dirVec);
Vec2.setFromValues(v0, 0, 0);
Vec2.setFromValues(v1, 1, 0);
Vec2.direction(v0, v1, dirVec);
assertElementsEquals([1, 0], dirVec);
Vec2.setFromValues(v0, 1, 1);
Vec2.setFromValues(v1, 0, 0);
Vec2.direction(v0, v1, dirVec);
assertElementsRoughlyEqual(
[-0.707106781, -0.707106781], dirVec, vec.EPSILON);
},
testLerp() {
const v0 = Vec2.createFloat32FromValues(1, 2);
const v1 = Vec2.createFloat32FromValues(10, 20);
const v2 = Vec2.cloneFloat32(v0);
Vec2.lerp(v2, v1, 0, v2);
assertElementsEquals([1, 2], v2);
Vec2.lerp(v2, v1, 1, v2);
assertElementsEquals([10, 20], v2);
Vec2.lerp(v0, v1, .5, v2);
assertElementsEquals([5.5, 11], v2);
},
testMax() {
const v0 = Vec2.createFloat32FromValues(10, 20);
const v1 = Vec2.createFloat32FromValues(5, 25);
const v2 = Vec2.createFloat32();
Vec2.max(v0, v1, v2);
assertElementsEquals([10, 25], v2);
Vec2.max(v1, v0, v1);
assertElementsEquals([10, 25], v1);
Vec2.max(v2, 20, v2);
assertElementsEquals([20, 25], v2);
},
testMin() {
const v0 = Vec2.createFloat32FromValues(10, 20);
const v1 = Vec2.createFloat32FromValues(5, 25);
const v2 = Vec2.createFloat32();
Vec2.min(v0, v1, v2);
assertElementsEquals([5, 20], v2);
Vec2.min(v1, v0, v1);
assertElementsEquals([5, 20], v1);
Vec2.min(v2, 10, v2);
assertElementsEquals([5, 10], v2);
},
testEquals() {
const v0 = Vec2.createFloat32FromValues(1, 2);
let v1 = Vec2.cloneFloat32(v0);
assertElementsEquals(v0, v1);
v1[0] = 4;
assertFalse(Vec2.equals(v0, v1));
v1 = Vec2.cloneFloat32(v0);
v1[1] = 4;
assertFalse(Vec2.equals(v0, v1));
},
});
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