Andreas Hocevar
361 lines
13 KiB
HTML
361 lines
13 KiB
HTML
<!DOCTYPE html>
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<html>
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<!--
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Copyright 2008 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.graphics.AffineTransform</title>
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<script src="../base.js"></script>
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<script>
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goog.require('goog.graphics');
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goog.require('goog.graphics.AffineTransform');
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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 testGetTranslateInstance() {
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var tx = goog.graphics.AffineTransform.getTranslateInstance(2, 4);
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assertEquals(1, tx.getScaleX());
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assertEquals(0, tx.getShearY());
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assertEquals(0, tx.getShearX());
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assertEquals(1, tx.getScaleY());
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assertEquals(2, tx.getTranslateX());
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assertEquals(4, tx.getTranslateY());
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}
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function testGetScaleInstance() {
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var tx = goog.graphics.AffineTransform.getScaleInstance(2, 4);
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assertEquals(2, tx.getScaleX());
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assertEquals(0, tx.getShearY());
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assertEquals(0, tx.getShearX());
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assertEquals(4, tx.getScaleY());
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assertEquals(0, tx.getTranslateX());
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assertEquals(0, tx.getTranslateY());
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}
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function testGetRotateInstance() {
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var tx = goog.graphics.AffineTransform.getRotateInstance(Math.PI / 2, 1, 2);
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assertRoughlyEquals(0, tx.getScaleX(), 1e-9);
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assertRoughlyEquals(1, tx.getShearY(), 1e-9);
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assertRoughlyEquals(-1, tx.getShearX(), 1e-9);
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assertRoughlyEquals(0, tx.getScaleY(), 1e-9);
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assertRoughlyEquals(3, tx.getTranslateX(), 1e-9);
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assertRoughlyEquals(1, tx.getTranslateY(), 1e-9);
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}
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function testGetShearInstance() {
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var tx = goog.graphics.AffineTransform.getShearInstance(2, 4);
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assertEquals(1, tx.getScaleX());
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assertEquals(4, tx.getShearY());
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assertEquals(2, tx.getShearX());
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assertEquals(1, tx.getScaleY());
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assertEquals(0, tx.getTranslateX());
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assertEquals(0, tx.getTranslateY());
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}
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function testConstructor() {
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assertThrows(function() {
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new goog.graphics.AffineTransform([0, 0]);
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});
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assertThrows(function() {
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new goog.graphics.AffineTransform({});
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});
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assertThrows(function() {
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new goog.graphics.AffineTransform(0, 0, 0, 'a', 0, 0);
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});
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var tx = new goog.graphics.AffineTransform(1, 2, 3, 4, 5, 6);
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assertEquals(1, tx.getScaleX());
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assertEquals(2, tx.getShearY());
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assertEquals(3, tx.getShearX());
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assertEquals(4, tx.getScaleY());
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assertEquals(5, tx.getTranslateX());
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assertEquals(6, tx.getTranslateY());
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tx = new goog.graphics.AffineTransform();
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assert(tx.isIdentity());
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}
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function testIsIdentity() {
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var tx = new goog.graphics.AffineTransform(1, 2, 3, 4, 5, 6);
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assertFalse(tx.isIdentity());
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tx.setTransform(1, 0, 0, 1, 0, 0);
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assert(tx.isIdentity());
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}
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function testClone() {
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var tx = new goog.graphics.AffineTransform(1, 2, 3, 4, 5, 6);
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var copy = tx.clone();
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assertEquals(copy.getScaleX(), tx.getScaleX());
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assertEquals(copy.getShearY(), tx.getShearY());
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assertEquals(copy.getShearX(), tx.getShearX());
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assertEquals(copy.getScaleY(), tx.getScaleY());
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assertEquals(copy.getTranslateX(), tx.getTranslateX());
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assertEquals(copy.getTranslateY(), tx.getTranslateY());
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}
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function testSetTransform() {
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var tx = new goog.graphics.AffineTransform();
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assertThrows(function() {
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tx.setTransform(1, 2, 3, 4, 6);
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});
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assertThrows(function() {
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tx.setTransform('a', 2, 3, 4, 5, 6);
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});
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tx.setTransform(1, 2, 3, 4, 5, 6);
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assertEquals(1, tx.getScaleX());
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assertEquals(2, tx.getShearY());
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assertEquals(3, tx.getShearX());
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assertEquals(4, tx.getScaleY());
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assertEquals(5, tx.getTranslateX());
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assertEquals(6, tx.getTranslateY());
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}
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function testScale() {
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var tx = new goog.graphics.AffineTransform(1, 2, 3, 4, 5, 6);
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tx.scale(2, 3);
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assertEquals(2, tx.getScaleX());
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assertEquals(4, tx.getShearY());
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assertEquals(9, tx.getShearX());
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assertEquals(12, tx.getScaleY());
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assertEquals(5, tx.getTranslateX());
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assertEquals(6, tx.getTranslateY());
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}
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function testPreScale() {
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var tx = new goog.graphics.AffineTransform(1, 2, 3, 4, 5, 6);
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tx.preScale(2, 3);
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assertEquals(2, tx.getScaleX());
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assertEquals(6, tx.getShearY());
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assertEquals(6, tx.getShearX());
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assertEquals(12, tx.getScaleY());
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assertEquals(10, tx.getTranslateX());
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assertEquals(18, tx.getTranslateY());
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}
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function testTranslate() {
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var tx = new goog.graphics.AffineTransform(1, 2, 3, 4, 5, 6);
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tx.translate(2, 3);
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assertEquals(1, tx.getScaleX());
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assertEquals(2, tx.getShearY());
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assertEquals(3, tx.getShearX());
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assertEquals(4, tx.getScaleY());
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assertEquals(16, tx.getTranslateX());
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assertEquals(22, tx.getTranslateY());
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}
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function testPreTranslate() {
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var tx = new goog.graphics.AffineTransform(1, 2, 3, 4, 5, 6);
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tx.preTranslate(2, 3);
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assertEquals(1, tx.getScaleX());
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assertEquals(2, tx.getShearY());
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assertEquals(3, tx.getShearX());
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assertEquals(4, tx.getScaleY());
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assertEquals(7, tx.getTranslateX());
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assertEquals(9, tx.getTranslateY());
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}
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function testRotate() {
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var tx = new goog.graphics.AffineTransform(1, 2, 3, 4, 5, 6);
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tx.rotate(Math.PI / 2, 1, 1);
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assertRoughlyEquals(3, tx.getScaleX(), 1e-9);
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assertRoughlyEquals(4, tx.getShearY(), 1e-9);
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assertRoughlyEquals(-1, tx.getShearX(), 1e-9);
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assertRoughlyEquals(-2, tx.getScaleY(), 1e-9);
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assertRoughlyEquals(7, tx.getTranslateX(), 1e-9);
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assertRoughlyEquals(10, tx.getTranslateY(), 1e-9);
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}
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function testPreRotate() {
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var tx = new goog.graphics.AffineTransform(1, 2, 3, 4, 5, 6);
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tx.preRotate(Math.PI / 2, 1, 1);
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assertRoughlyEquals(-2, tx.getScaleX(), 1e-9);
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assertRoughlyEquals(1, tx.getShearY(), 1e-9);
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assertRoughlyEquals(-4, tx.getShearX(), 1e-9);
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assertRoughlyEquals(3, tx.getScaleY(), 1e-9);
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assertRoughlyEquals(-4, tx.getTranslateX(), 1e-9);
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assertRoughlyEquals(5, tx.getTranslateY(), 1e-9);
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}
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function testShear() {
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var tx = new goog.graphics.AffineTransform(1, 2, 3, 4, 5, 6);
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tx.shear(2, 3);
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assertEquals(10, tx.getScaleX());
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assertEquals(14, tx.getShearY());
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assertEquals(5, tx.getShearX());
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assertEquals(8, tx.getScaleY());
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assertEquals(5, tx.getTranslateX());
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assertEquals(6, tx.getTranslateY());
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}
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function testPreShear() {
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var tx = new goog.graphics.AffineTransform(1, 2, 3, 4, 5, 6);
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tx.preShear(2, 3);
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assertEquals(5, tx.getScaleX());
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assertEquals(5, tx.getShearY());
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assertEquals(11, tx.getShearX());
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assertEquals(13, tx.getScaleY());
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assertEquals(17, tx.getTranslateX());
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assertEquals(21, tx.getTranslateY());
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}
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function testConcatentate() {
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var tx = new goog.graphics.AffineTransform(1, 2, 3, 4, 5, 6);
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tx.concatenate(new goog.graphics.AffineTransform(2, 1, 6, 5, 4, 3));
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assertEquals(5, tx.getScaleX());
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assertEquals(8, tx.getShearY());
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assertEquals(21, tx.getShearX());
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assertEquals(32, tx.getScaleY());
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assertEquals(18, tx.getTranslateX());
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assertEquals(26, tx.getTranslateY());
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}
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function testPreConcatentate() {
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var tx = new goog.graphics.AffineTransform(1, 2, 3, 4, 5, 6);
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tx.preConcatenate(new goog.graphics.AffineTransform(2, 1, 6, 5, 4, 3));
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assertEquals(14, tx.getScaleX());
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assertEquals(11, tx.getShearY());
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assertEquals(30, tx.getShearX());
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assertEquals(23, tx.getScaleY());
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assertEquals(50, tx.getTranslateX());
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assertEquals(38, tx.getTranslateY());
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}
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function testAssociativeConcatenate() {
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var x = new goog.graphics.AffineTransform(2, 3, 5, 7, 11, 13).concatenate(
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new goog.graphics.AffineTransform(17, 19, 23, 29, 31, 37));
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var y = new goog.graphics.AffineTransform(17, 19, 23, 29, 31, 37)
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.preConcatenate(new goog.graphics.AffineTransform(2, 3, 5, 7, 11, 13));
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assertEquals(x.getScaleX(), y.getScaleX());
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assertEquals(x.getShearY(), y.getShearY());
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assertEquals(x.getShearX(), y.getShearX());
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assertEquals(x.getScaleY(), y.getScaleY());
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assertEquals(x.getTranslateX(), y.getTranslateX());
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assertEquals(x.getTranslateY(), y.getTranslateY());
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};
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function testTransform() {
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var srcPts = [0, 0, 1, 0, 1, 1, 0, 1];
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var dstPts = [];
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var tx = goog.graphics.AffineTransform.getScaleInstance(2, 3);
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tx.translate(5, 10);
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tx.rotate(Math.PI / 4, 5, 10);
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tx.transform(srcPts, 0, dstPts, 0, 4);
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assert(goog.array.equals(
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[27.071068, 28.180195, 28.485281, 30.301516,
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27.071068, 32.422836, 25.656855, 30.301516],
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dstPts,
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goog.math.nearlyEquals));
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}
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function testGetDeterminant() {
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var tx = goog.graphics.AffineTransform.getScaleInstance(2, 3);
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tx.translate(5, 10);
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tx.rotate(Math.PI / 4, 5, 10);
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assertRoughlyEquals(6, tx.getDeterminant(), 0.001);
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}
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function testIsInvertible() {
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assertTrue(new goog.graphics.AffineTransform(2, 3, 4, 5, 6, 7).
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isInvertible());
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assertTrue(new goog.graphics.AffineTransform(1, 0, 0, 1, 0, 0).
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isInvertible());
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assertFalse(new goog.graphics.AffineTransform(NaN, 0, 0, 1, 0, 0).
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isInvertible());
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assertFalse(new goog.graphics.AffineTransform(1, NaN, 0, 1, 0, 0).
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isInvertible());
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assertFalse(new goog.graphics.AffineTransform(1, 0, NaN, 1, 0, 0).
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isInvertible());
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assertFalse(new goog.graphics.AffineTransform(1, 0, 0, NaN, 0, 0).
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isInvertible());
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assertFalse(new goog.graphics.AffineTransform(1, 0, 0, 1, NaN, 0).
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isInvertible());
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assertFalse(new goog.graphics.AffineTransform(1, 0, 0, 1, 0, NaN).
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isInvertible());
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assertFalse(new goog.graphics.AffineTransform(Infinity, 0, 0, 1, 0, 0).
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isInvertible());
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assertFalse(new goog.graphics.AffineTransform(1, Infinity, 0, 1, 0, 0).
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isInvertible());
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assertFalse(new goog.graphics.AffineTransform(1, 0, Infinity, 1, 0, 0).
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isInvertible());
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assertFalse(new goog.graphics.AffineTransform(1, 0, 0, Infinity, 0, 0).
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isInvertible());
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assertFalse(new goog.graphics.AffineTransform(1, 0, 0, 1, Infinity, 0).
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isInvertible());
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assertFalse(new goog.graphics.AffineTransform(1, 0, 0, 1, 0, Infinity).
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isInvertible());
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assertFalse(new goog.graphics.AffineTransform(0, 0, 0, 0, 1, 0).
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isInvertible());
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}
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function testCreateInverse() {
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var tx = goog.graphics.AffineTransform.getScaleInstance(2, 3);
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tx.translate(5, 10);
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tx.rotate(Math.PI / 4, 5, 10);
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var inverse = tx.createInverse();
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assert(goog.math.nearlyEquals(0.353553, inverse.getScaleX()));
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assert(goog.math.nearlyEquals(-0.353553, inverse.getShearY()));
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assert(goog.math.nearlyEquals(0.235702, inverse.getShearX()));
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assert(goog.math.nearlyEquals(0.235702, inverse.getScaleY()));
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assert(goog.math.nearlyEquals(-16.213203, inverse.getTranslateX()));
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assert(goog.math.nearlyEquals(2.928932, inverse.getTranslateY()));
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}
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function testCopyFrom() {
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var from = new goog.graphics.AffineTransform(1, 2, 3, 4, 5, 6);
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var to = new goog.graphics.AffineTransform();
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to.copyFrom(from);
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assertEquals(from.getScaleX(), to.getScaleX());
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assertEquals(from.getShearY(), to.getShearY());
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assertEquals(from.getShearX(), to.getShearX());
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assertEquals(from.getScaleY(), to.getScaleY());
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assertEquals(from.getTranslateX(), to.getTranslateX());
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assertEquals(from.getTranslateY(), to.getTranslateY());
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}
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function testToString() {
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var tx = new goog.graphics.AffineTransform(1, 2, 3, 4, 5, 6);
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assertEquals("matrix(1,2,3,4,5,6)", tx.toString());
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}
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function testEquals() {
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var tx1 = new goog.graphics.AffineTransform(1, 2, 3, 4, 5, 6);
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var tx2 = new goog.graphics.AffineTransform(1, 2, 3, 4, 5, 6);
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assertEqualsMethod(tx1, tx2, true);
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tx2 = new goog.graphics.AffineTransform(-1, 2, 3, 4, 5, 6);
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assertEqualsMethod(tx1, tx2, false);
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tx2 = new goog.graphics.AffineTransform(1, -1, 3, 4, 5, 6);
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assertEqualsMethod(tx1, tx2, false);
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tx2 = new goog.graphics.AffineTransform(1, 2, -3, 4, 5, 6);
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assertEqualsMethod(tx1, tx2, false);
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tx2 = new goog.graphics.AffineTransform(1, 2, 3, -4, 5, 6);
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assertEqualsMethod(tx1, tx2, false);
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tx2 = new goog.graphics.AffineTransform(1, 2, 3, 4, -5, 6);
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assertEqualsMethod(tx1, tx2, false);
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tx2 = new goog.graphics.AffineTransform(1, 2, 3, 4, 5, -6);
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assertEqualsMethod(tx1, tx2, false);
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}
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function assertEqualsMethod(tx1, tx2, expected) {
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assertEquals(expected, tx1.equals(tx2));
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assertEquals(expected, tx2.equals(tx1));
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assertEquals(true, tx1.equals(tx1));
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assertEquals(true, tx2.equals(tx2));
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}
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</script>
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</body>
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</html>
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