One Month In Minsk. Made in Belarus.

1 files changed, 43 insertions, 0 deletions

diff --git a/geometry/geometry_tests/transformations_test.cpp b/geometry/geometry_tests/transformations_test.cpp
new file mode 100644
index 0000000000..e6c1a0fd89
--- /dev/null
+++ b/geometry/geometry_tests/transformations_test.cpp
@@ -0,0 +1,43 @@
+#include "../../base/SRC_FIRST.hpp"
+
+#include "../../testing/testing.hpp"
+#include "../../base/matrix.hpp"
+#include "../../geometry/point2d.hpp"
+#include "../transformations.hpp"
+
+UNIT_TEST(Transformations_Shift)
+{
+  math::Matrix<double, 3, 3> m = math::Shift(math::Identity<double, 3>(), 200.0, 100.0);
+
+  m2::PointD pt = m2::PointD(30, 20) * m;
+
+  TEST(pt.EqualDxDy(m2::PointD(230, 120), 1.0E-10), ());
+}
+
+UNIT_TEST(Transformations_ShiftScale)
+{
+  math::Matrix<double, 3, 3> m = math::Scale(math::Shift(math::Identity<double, 3>(), 100, 100), 2, 3);
+  m2::PointD pt = m2::PointD(20, 10) * m;
+
+  TEST(pt.EqualDxDy(m2::PointD(240, 330), 1.0E-10), ());
+}
+
+UNIT_TEST(Transformations_Rotate)
+{
+  math::Matrix<double, 3, 3> m = math::Rotate(math::Identity<double, 3>(), math::pi / 2);
+  TEST(m2::PointD(0, 100).EqualDxDy(m2::PointD(100, 0) * m, 1.0E-10), ());
+}
+
+UNIT_TEST(Transformations_ShiftScaleRotate)
+{
+  math::Matrix<double, 3, 3> m = math::Rotate(math::Scale(math::Shift(math::Identity<double, 3>(), 100, 100), 2, 3), -math::pi / 2);
+  m2::PointD pt = m2::PointD(20, 10) * m;
+
+  TEST(pt.EqualDxDy(m2::PointD(330, -240), 1.0E-10), ());
+
+  math::Matrix<double, 3, 3> invM = math::Inverse(m);
+
+  m2::PointD invPt = m2::PointD(330, -240) * invM;
+
+  TEST(invPt.EqualDxDy(m2::PointD(20, 10), 1.0E-10), ());
+}