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