| /* |
| * Copyright 2014 Google Inc. All Rights Reserved. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <cmath> |
| |
| #include "cobalt/math/transform_2d.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| using cobalt::math::Matrix3F; |
| |
| TEST(Transform2DTest, Translation) { |
| Matrix3F expected_value = Matrix3F::FromValues( |
| 1.0f, 0, 3.0f, |
| 0, 1.0f, 4.0f, |
| 0, 0, 1.0f); |
| |
| EXPECT_TRUE(expected_value.IsNear( |
| cobalt::math::TranslateMatrix(3, 4), 0.00001f)); |
| } |
| |
| TEST(Transform2DTest, AnisotropicScale) { |
| Matrix3F expected_value = Matrix3F::FromValues( |
| 3.0f, 0, 0, |
| 0, 4.0f, 0, |
| 0, 0, 1.0f); |
| |
| EXPECT_TRUE(expected_value.IsNear( |
| cobalt::math::ScaleMatrix(3, 4), 0.00001f)); |
| } |
| |
| TEST(Transform2DTest, IsotropicScale) { |
| Matrix3F expected_value = Matrix3F::FromValues( |
| 3.0f, 0, 0, |
| 0, 3.0f, 0, |
| 0, 0, 1.0f); |
| |
| EXPECT_TRUE(expected_value.IsNear( |
| cobalt::math::ScaleMatrix(3), 0.00001f)); |
| } |
| |
| TEST(Transform2DTest, Rotation) { |
| const float kTheta = static_cast<float>(M_PI) / 4.0f; |
| |
| // Note that we account for the fact that up is represented by negative y. |
| Matrix3F expected_value = Matrix3F::FromValues( |
| cos(kTheta), sin(kTheta), 0, |
| -sin(kTheta), cos(kTheta), 0, |
| 0, 0, 1.0f); |
| |
| EXPECT_TRUE(expected_value.IsNear( |
| cobalt::math::RotateMatrix(kTheta), 0.00001f)); |
| } |