| <!DOCTYPE html> |
| <html> |
| <head> |
| <title>Geometry Interfaces: Test DOMMatrix non-mutating methods</title> |
| <link href="mailto:peter.hall@algomi.com" rel="author" title="Peter Hall"> |
| <link rel="help" href="https://drafts.fxtf.org/geometry-1/#dom-dommatrixreadonly"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| </head> |
| <body> |
| <p>Test DOMMatrix non-mutating methods</p> |
| <div id="log"></div> |
| <script> |
| var epsilon = 0.0000000005; |
| |
| function initialMatrix(){ |
| return { |
| m11:1, m12:-0.5, m13: 0.5, m14:0, |
| m21:0.5, m22:2, m23: -0.5, m24:0, |
| m31:0, m32:0, m33: 1, m34:0, |
| m41:10, m42:20, m43: 10, m44:1, |
| is2D: false |
| }; |
| } |
| |
| function initialDOMMatrix() { |
| return DOMMatrixReadOnly.fromMatrix(initialMatrix()) |
| } |
| |
| function identity() { |
| return new DOMMatrix( |
| [1, 0, 0, 0, |
| 0, 1, 0 ,0, |
| 0, 0, 1, 0, |
| 0, 0, 0, 1]); |
| } |
| |
| function update(matrix, f) { |
| f(matrix); |
| return matrix; |
| } |
| |
| function deg2rad(degrees) { |
| return degrees * Math.PI / 180; |
| } |
| |
| function getRotationMatrix(x, y, z, alpha_in_degrees) { |
| // Vector normalizing |
| var nx = x; |
| var ny = y; |
| var nz = z; |
| var length = Math.sqrt(x * x + y * y + z * z); |
| if (length) { |
| nx = x / length; |
| ny = y / length; |
| nz = z / length; |
| } |
| |
| // The 3D rotation matrix is described in CSS Transforms with alpha. |
| // Please see: https://drafts.csswg.org/css-transforms-1/#Rotate3dDefined |
| var alpha_in_radians = deg2rad(alpha_in_degrees / 2); |
| var sc = Math.sin(alpha_in_radians) * Math.cos(alpha_in_radians); |
| var sq = Math.sin(alpha_in_radians) * Math.sin(alpha_in_radians); |
| |
| var m11 = 1 - 2 * (ny * ny + nz * nz) * sq; |
| var m12 = 2 * (nx * ny * sq + nz * sc); |
| var m13 = 2 * (nx * nz * sq - ny * sc); |
| var m14 = 0; |
| var m21 = 2 * (nx * ny * sq - nz * sc); |
| var m22 = 1 - 2 * (nx * nx + nz * nz) * sq; |
| var m23 = 2 * (ny * nz * sq + nx * sc); |
| var m24 = 0; |
| var m31 = 2 * (nx * nz * sq + ny * sc); |
| var m32 = 2 * (ny * nz * sq - nx * sc); |
| var m33 = 1 - 2 * (nx * nx + ny * ny) * sq; |
| var m34 = 0; |
| var m41 = 0; |
| var m42 = 0; |
| var m43 = 0; |
| var m44 = 1; |
| |
| return new DOMMatrix([ |
| m11, m12, m13, m14, |
| m21, m22, m23, m24, |
| m31, m32, m33, m34, |
| m41, m42, m43, m44]); |
| } |
| |
| test(function() { |
| var tx = 1; |
| var ty = 5; |
| var tz = 3; |
| var result = initialDOMMatrix().translate(tx, ty, tz); |
| var expected = update(initialMatrix(), function(m) { |
| m.m41 += tx * m.m11 + ty * m.m21 + tz * m.m31; |
| m.m42 += tx * m.m12 + ty * m.m22 + tz * m.m32; |
| m.m43 += tx * m.m13 + ty * m.m23 + tz * m.m33; |
| m.m44 += tx * m.m14 + ty * m.m24 + tz * m.m34; |
| }); |
| checkDOMMatrix(result, expected); |
| },"test translate()"); |
| |
| test(function() { |
| var sx = 2; |
| var sy = 5; |
| var sz = 3; |
| var result = initialDOMMatrix().scale(sx, sy, sz); |
| var expected = update(initialMatrix(), function(m) { |
| m.m11 *= sx; |
| m.m12 *= sx; |
| m.m13 *= sx; |
| m.m14 *= sx; |
| m.m21 *= sy; |
| m.m22 *= sy; |
| m.m23 *= sy; |
| m.m24 *= sy; |
| m.m31 *= sz; |
| m.m32 *= sz; |
| m.m33 *= sz; |
| m.m34 *= sz; |
| }); |
| checkDOMMatrix(result, expected); |
| },"test scale() without offsets"); |
| |
| test(function() { |
| var result = initialDOMMatrix().scale(2, 5, 3, 11, 7, 13); |
| var expected = initialDOMMatrix() |
| .translate(11, 7, 13) |
| .scale(2, 5, 3) |
| .translate(-11, -7, -13); |
| checkDOMMatrix(result, expected); |
| },"test scale() with offsets"); |
| |
| test(function() { |
| var result = initialDOMMatrix().scale3d(7, 5, 2, 3); |
| var expected = initialDOMMatrix() |
| .translate(5, 2, 3) |
| .scale(7, 7, 7) |
| .translate(-5, -2, -3); |
| checkDOMMatrix(result, expected); |
| },"test scale3d()"); |
| |
| test(function() { |
| var result = initialDOMMatrix().rotate(-90); |
| var expected = initialDOMMatrix().multiply(getRotationMatrix(0, 0, 1, -90)); |
| checkDOMMatrix(result, expected); |
| },"test rotate() 2d"); |
| |
| test(function() { |
| var result = initialDOMMatrix().rotate(180, 180, 90); |
| var expected = initialDOMMatrix().rotate(0,0,-90); |
| checkDOMMatrix(result, expected); |
| },"test rotate()"); |
| |
| test(function() { |
| var result = initialDOMMatrix().rotateFromVector(1, 1); |
| var expected = initialDOMMatrix().rotate(45); |
| checkDOMMatrix(result, expected); |
| },"test rotateFromVector()"); |
| |
| test(function() { |
| var result = initialDOMMatrix().rotateAxisAngle(3, 3, 3, 120); |
| var expected = initialDOMMatrix().multiply(getRotationMatrix(3, 3, 3, 120)); |
| checkDOMMatrix(result, expected); |
| },"test rotateAxisAngle() "); |
| |
| test(function() { |
| var angleDeg = 75; |
| var result = initialDOMMatrix().skewX(angleDeg); |
| var tangent = Math.tan(angleDeg * Math.PI/180); |
| var skew = new DOMMatrix([ |
| 1, 0, 0, 0, |
| tangent, 1, 0, 0, |
| 0, 0, 1, 0, |
| 0, 0, 0, 1]) |
| var expected = initialDOMMatrix().multiply(skew); |
| checkDOMMatrix(result, expected); |
| },"test skewX()"); |
| |
| test(function() { |
| var angleDeg = 18; |
| var result = initialDOMMatrix().skewY(angleDeg); |
| var tangent = Math.tan(angleDeg * Math.PI/180); |
| var skew = new DOMMatrix([ |
| 1, tangent, 0, 0, |
| 0, 1, 0, 0, |
| 0, 0, 1, 0, |
| 0, 0, 0, 1]) |
| var expected = initialDOMMatrix().multiply(skew); |
| checkDOMMatrix(result, expected); |
| },"test skewY()"); |
| |
| test(function() { |
| var result = initialDOMMatrix().multiply(initialDOMMatrix().inverse()); |
| checkDOMMatrix(result, identity()); |
| },"test multiply with inverse is identity"); |
| |
| test(function() { |
| var result = initialDOMMatrix().flipX(); |
| var expected = initialDOMMatrix().multiply(new DOMMatrix([-1, 0, 0, 1, 0, 0])); |
| checkDOMMatrix(result, expected); |
| },"test flipX()"); |
| |
| test(function() { |
| var result = initialDOMMatrix().flipY(); |
| var expected = initialDOMMatrix().multiply(new DOMMatrix([1, 0, 0, -1, 0, 0])); |
| checkDOMMatrix(result, expected); |
| },"test flipY()"); |
| |
| |
| function checkDOMMatrix(m, exp) { |
| assert_approx_equals(m.m11, exp.m11, epsilon, "Expected value for m11 is " + exp.m11); |
| assert_approx_equals(m.m12, exp.m12, epsilon, "Expected value for m12 is " + exp.m12); |
| assert_approx_equals(m.m13, exp.m13, epsilon, "Expected value for m13 is " + exp.m13); |
| assert_approx_equals(m.m14, exp.m14, epsilon, "Expected value for m14 is " + exp.m14); |
| assert_approx_equals(m.m21, exp.m21, epsilon, "Expected value for m21 is " + exp.m21); |
| assert_approx_equals(m.m22, exp.m22, epsilon, "Expected value for m22 is " + exp.m22); |
| assert_approx_equals(m.m23, exp.m23, epsilon, "Expected value for m23 is " + exp.m23); |
| assert_approx_equals(m.m24, exp.m24, epsilon, "Expected value for m24 is " + exp.m24); |
| assert_approx_equals(m.m31, exp.m31, epsilon, "Expected value for m31 is " + exp.m31); |
| assert_approx_equals(m.m32, exp.m32, epsilon, "Expected value for m32 is " + exp.m32); |
| assert_approx_equals(m.m33, exp.m33, epsilon, "Expected value for m33 is " + exp.m33); |
| assert_approx_equals(m.m34, exp.m34, epsilon, "Expected value for m34 is " + exp.m34); |
| assert_approx_equals(m.m41, exp.m41, epsilon, "Expected value for m41 is " + exp.m41); |
| assert_approx_equals(m.m42, exp.m42, epsilon, "Expected value for m42 is " + exp.m42); |
| assert_approx_equals(m.m43, exp.m43, epsilon, "Expected value for m43 is " + exp.m43); |
| assert_approx_equals(m.m44, exp.m44, epsilon, "Expected value for m44 is " + exp.m44); |
| assert_equals(m.is2D, exp.is2D, "Expected value for is2D is " + exp.is2D); |
| } |
| |
| </script> |
| </body> |
| </html> |
