| <!DOCTYPE HTML> |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <script src="./resources/geometry-interfaces-test-helpers.js"></script> |
| <script> |
| test(function() { |
| var matrix2d = new DOMMatrixReadOnly([1, 2, 3, 4, 5, 6]); |
| var inverse = matrix2d.inverse(); |
| assert_2d_matrix_equals(inverse, [-2, 1, 1.5, -0.5, 1, -2]); |
| }, "DOMMatrix inverse() - invertible - 2D matrix"); |
| |
| test(function() { |
| var matrix2d = new DOMMatrixReadOnly([1, 1, 1, 1, 1, 1]); |
| var inverse =matrix2d.inverse(); |
| //when non invertible matrix execute invert(), result matrix is not 2d. |
| assert_3d_matrix_equals(inverse, [NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN]); |
| }, "DOMMatrix inverse() - non-invertible - 2D matrix"); |
| |
| test(function() { |
| var matrix3d = new DOMMatrixReadOnly([10, 20, 30, 40, 40, 40, 30, 20, 10, 20, 40, 30, 20, 40, 50, 100]); |
| var inverse = matrix3d.inverse(); |
| assert_matrix_almost_equals(inverse, new DOMMatrix([-1.6, 0.05, 0.6, 0.45, 2.05, -0.025, -0.8, -0.575, -0.4, 0, 0.2, 0.1, -0.3, 0, 0.1, 0.1])); |
| }, "DOMMatrix inverse() - invertible - 3D matrix"); |
| |
| test(function() { |
| var matrix3d = new DOMMatrixReadOnly([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]); |
| var inverse = matrix3d.inverse(); |
| assert_3d_matrix_equals(inverse, [NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN, NaN]); |
| }, "DOMMatrix inverse() - non-invertible - 3D matrix"); |
| </script> |
