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#include "cru/platform/GraphicsBase.hpp"
#include "cru/platform/Matrix.hpp"
#include <gtest/gtest.h>
using cru::platform::Matrix;
using cru::platform::Point;
TEST(Matrix, Rotation) {
Point p(1, 1);
Point p90 = Matrix::Rotation(90).TransformPoint(p);
ASSERT_FLOAT_EQ(p90.x, -1);
ASSERT_FLOAT_EQ(p90.y, 1);
Point p180 = Matrix::Rotation(180).TransformPoint(p);
ASSERT_FLOAT_EQ(p180.x, -1);
ASSERT_FLOAT_EQ(p180.y, -1);
Point p270 = Matrix::Rotation(270).TransformPoint(p);
ASSERT_FLOAT_EQ(p270.x, 1);
ASSERT_FLOAT_EQ(p270.y, -1);
}
TEST(Matrix, TranslationAndRotation) {
Point p =
(Matrix::Translation(1, 1) * Matrix::Rotation(90)).TransformPoint({1, 1});
ASSERT_FLOAT_EQ(p.x, -2);
ASSERT_FLOAT_EQ(p.y, 2);
}
TEST(Matrix, RotationAndTranslation) {
Point p =
(Matrix::Rotation(90) * Matrix::Translation(1, 1)).TransformPoint({1, 1});
ASSERT_FLOAT_EQ(p.x, 0);
ASSERT_FLOAT_EQ(p.y, 2);
}
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