Andreas Hocevar
255 lines
7.5 KiB
HTML
255 lines
7.5 KiB
HTML
<!DOCTYPE html>
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<html>
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<!--
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Copyright 2012 The Closure Library Authors. All Rights Reserved.
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Use of this source code is governed by the Apache License, Version 2.0.
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See the COPYING file for details.
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-->
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<head>
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<title>Closure Unit Tests - goog.vec.Vec2</title>
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<script src="../base.js"></script>
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<script>
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goog.require('goog.vec.Float32Array');
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goog.require('goog.vec.Vec2');
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goog.require('goog.testing.jsunit');
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</script>
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</head>
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<body>
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<script>
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function testConstructor() {
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var v = goog.vec.Vec2.createFloat32();
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assertElementsEquals(0, v[0]);
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assertEquals(0, v[1]);
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assertElementsEquals([0, 0], goog.vec.Vec2.createFloat32());
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goog.vec.Vec2.setFromValues(v, 1, 2);
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assertElementsEquals([1, 2], v);
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var w = goog.vec.Vec2.createFloat64();
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assertElementsEquals(0, w[0]);
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assertEquals(0, w[1]);
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assertElementsEquals([0, 0], goog.vec.Vec2.createFloat64());
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goog.vec.Vec2.setFromValues(w, 1, 2);
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assertElementsEquals([1, 2], w);
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}
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function testSet() {
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var v = goog.vec.Vec2.createFloat32();
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goog.vec.Vec2.setFromValues(v, 1, 2);
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assertElementsEquals([1, 2], v);
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goog.vec.Vec2.setFromArray(v, [4, 5]);
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assertElementsEquals([4, 5], v);
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var w = goog.vec.Vec2.createFloat32();
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goog.vec.Vec2.setFromValues(w, 1, 2);
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assertElementsEquals([1, 2], w);
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goog.vec.Vec2.setFromArray(w, [4, 5]);
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assertElementsEquals([4, 5], w);
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}
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function testAdd() {
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var v0 = goog.vec.Vec2.createFloat32FromArray([1, 2]);
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var v1 = goog.vec.Vec2.createFloat32FromArray([4, 5]);
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var v2 = goog.vec.Vec2.cloneFloat32(v0);
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goog.vec.Vec2.add(v2, v1, v2);
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assertElementsEquals([1, 2], v0);
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assertElementsEquals([4, 5], v1);
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assertElementsEquals([5, 7], v2);
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goog.vec.Vec2.add(goog.vec.Vec2.add(v0, v1, v2), v0, v2);
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assertElementsEquals([6, 9], v2);
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}
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function testSubtract() {
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var v0 = goog.vec.Vec2.createFloat32FromArray([1, 2]);
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var v1 = goog.vec.Vec2.createFloat32FromArray([4, 5]);
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var v2 = goog.vec.Vec2.cloneFloat32(v0);
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goog.vec.Vec2.subtract(v2, v1, v2);
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assertElementsEquals([1, 2], v0);
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assertElementsEquals([4, 5], v1);
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assertElementsEquals([-3, -3], v2);
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goog.vec.Vec2.setFromValues(v2, 0, 0, 0);
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goog.vec.Vec2.subtract(v1, v0, v2);
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assertElementsEquals([3, 3], v2);
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v2 = goog.vec.Vec2.cloneFloat32(v0);
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goog.vec.Vec2.subtract(v2, v1, v2);
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assertElementsEquals([-3, -3], v2);
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goog.vec.Vec2.subtract(goog.vec.Vec2.subtract(v1, v0, v2), v0, v2);
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assertElementsEquals([2, 1], v2);
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}
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function testNegate() {
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var v0 = goog.vec.Vec2.createFloat32FromArray([1, 2]);
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var v1 = goog.vec.Vec2.createFloat32();
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goog.vec.Vec2.negate(v0, v1);
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assertElementsEquals([-1, -2], v1);
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assertElementsEquals([1, 2], v0);
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goog.vec.Vec2.negate(v0, v0);
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assertElementsEquals([-1, -2], v0);
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}
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function testAbs() {
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var v0 = goog.vec.Vec2.createFloat32FromValues(-1, -2);
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var v1 = goog.vec.Vec2.createFloat32();
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goog.vec.Vec2.abs(v0, v1);
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assertElementsEquals([1, 2], v1);
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assertElementsEquals([-1, -2], v0);
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goog.vec.Vec2.abs(v0, v0);
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assertElementsEquals([1, 2], v0);
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}
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function testScale() {
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var v0 = goog.vec.Vec2.createFloat32FromArray([1, 2]);
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var v1 = goog.vec.Vec2.createFloat32();
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goog.vec.Vec2.scale(v0, 4, v1);
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assertElementsEquals([4, 8], v1);
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assertElementsEquals([1, 2], v0);
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goog.vec.Vec2.setFromArray(v1, v0);
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goog.vec.Vec2.scale(v1, 5, v1);
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assertElementsEquals([5, 10], v1);
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}
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function testMagnitudeSquared() {
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var v0 = goog.vec.Vec2.createFloat32FromArray([1, 2]);
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assertEquals(5, goog.vec.Vec2.magnitudeSquared(v0));
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}
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function testMagnitude() {
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var v0 = goog.vec.Vec2.createFloat32FromArray([1, 2]);
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assertEquals(Math.sqrt(5), goog.vec.Vec2.magnitude(v0));
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}
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function testNormalize() {
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var v0 = goog.vec.Vec2.createFloat32FromArray([2, 3]);
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var v1 = goog.vec.Vec2.createFloat32();
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var v2 = goog.vec.Vec2.createFloat32();
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goog.vec.Vec2.scale(
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v0, 1 / goog.vec.Vec2.magnitude(v0), v2);
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goog.vec.Vec2.normalize(v0, v1);
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assertElementsEquals(v2, v1);
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assertElementsEquals([2, 3], v0);
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goog.vec.Vec2.setFromArray(v1, v0);
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goog.vec.Vec2.normalize(v1, v1);
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assertElementsEquals(v2, v1);
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}
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function testDot() {
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var v0 = goog.vec.Vec2.createFloat32FromArray([1, 2]);
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var v1 = goog.vec.Vec2.createFloat32FromArray([4, 5]);
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assertEquals(14, goog.vec.Vec2.dot(v0, v1));
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assertEquals(14, goog.vec.Vec2.dot(v1, v0));
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}
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function testDistanceSquared() {
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var v0 = goog.vec.Vec2.createFloat32FromValues(1, 2);
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var v1 = goog.vec.Vec2.createFloat32FromValues(1, 2);
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assertEquals(0, goog.vec.Vec2.distanceSquared(v0, v1));
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goog.vec.Vec2.setFromValues(v0, 1, 2);
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goog.vec.Vec2.setFromValues(v1, -1, -2);
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assertEquals(20, goog.vec.Vec2.distanceSquared(v0, v1));
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}
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function testDistance() {
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var v0 = goog.vec.Vec2.createFloat32FromValues(1, 2);
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var v1 = goog.vec.Vec2.createFloat32FromValues(1, 2);
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assertEquals(0, goog.vec.Vec2.distance(v0, v1));
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goog.vec.Vec2.setFromValues(v0, 2, 3);
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goog.vec.Vec2.setFromValues(v1, -2, 0);
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assertEquals(5, goog.vec.Vec2.distance(v0, v1));
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}
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function testDirection() {
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var v0 = goog.vec.Vec2.createFloat32FromValues(1, 2);
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var v1 = goog.vec.Vec2.createFloat32FromValues(1, 2);
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var dirVec = goog.vec.Vec2.createFloat32FromValues(4, 5);
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goog.vec.Vec2.direction(v0, v1, dirVec);
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assertElementsEquals([0, 0], dirVec);
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goog.vec.Vec2.setFromValues(v0, 0, 0);
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goog.vec.Vec2.setFromValues(v1, 1, 0);
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goog.vec.Vec2.direction(v0, v1, dirVec);
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assertElementsEquals([1, 0], dirVec);
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goog.vec.Vec2.setFromValues(v0, 1, 1);
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goog.vec.Vec2.setFromValues(v1, 0, 0);
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goog.vec.Vec2.direction(v0, v1, dirVec);
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assertElementsRoughlyEqual(
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[-0.707106781, -0.707106781],
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dirVec, goog.vec.EPSILON);
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}
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function testLerp() {
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var v0 = goog.vec.Vec2.createFloat32FromValues(1, 2);
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var v1 = goog.vec.Vec2.createFloat32FromValues(10, 20);
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var v2 = goog.vec.Vec2.cloneFloat32(v0);
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goog.vec.Vec2.lerp(v2, v1, 0, v2);
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assertElementsEquals([1, 2], v2);
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goog.vec.Vec2.lerp(v2, v1, 1, v2);
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assertElementsEquals([10, 20], v2);
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goog.vec.Vec2.lerp(v0, v1, .5, v2);
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assertElementsEquals([5.5, 11], v2);
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}
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function testMax() {
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var v0 = goog.vec.Vec2.createFloat32FromValues(10, 20);
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var v1 = goog.vec.Vec2.createFloat32FromValues(5, 25);
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var v2 = goog.vec.Vec2.createFloat32();
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goog.vec.Vec2.max(v0, v1, v2);
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assertElementsEquals([10, 25], v2);
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goog.vec.Vec2.max(v1, v0, v1);
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assertElementsEquals([10, 25], v1);
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goog.vec.Vec2.max(v2, 20, v2);
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assertElementsEquals([20, 25], v2);
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}
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function testMin() {
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var v0 = goog.vec.Vec2.createFloat32FromValues(10, 20);
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var v1 = goog.vec.Vec2.createFloat32FromValues(5, 25);
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var v2 = goog.vec.Vec2.createFloat32();
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goog.vec.Vec2.min(v0, v1, v2);
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assertElementsEquals([5, 20], v2);
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goog.vec.Vec2.min(v1, v0, v1);
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assertElementsEquals([5, 20], v1);
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goog.vec.Vec2.min(v2, 10, v2);
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assertElementsEquals([5, 10], v2);
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}
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function testEquals() {
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var v0 = goog.vec.Vec2.createFloat32FromValues(1, 2);
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var v1 = goog.vec.Vec2.cloneFloat32(v0);
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assertElementsEquals(v0, v1);
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v1[0] = 4;
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assertFalse(goog.vec.Vec2.equals(v0, v1));
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v1 = goog.vec.Vec2.cloneFloat32(v0);
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v1[1] = 4;
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assertFalse(goog.vec.Vec2.equals(v0, v1));
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}
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</script>
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</body>
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