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