Bring Math::Geometry::Rectangle to Magnum namespace.

src/Magnum.h

@@ -66,7 +66,11 @@ namespace Math {
 
     template<class T> constexpr T deg(T value);
     template<class T> constexpr T rad(T value);
-    template<class T> struct Constants;
+    template<class T> class Constants;
+
+    namespace Geometry {
+        template<class> class Rectangle;
+    }
 }
 
 /* Bring debugging facility from Corrade::Utility namespace */
@@ -117,6 +121,12 @@ typedef Math::Matrix4<GLfloat> Matrix4;
 /* Using float instead of GLfloat to not break KDevelop autocompletion */
 typedef Math::Constants<float> Constants;
 
+/** @brief Floating-point rectangle */
+typedef Math::Geometry::Rectangle<GLfloat> Rectangle;
+
+/** @brief Integer rectangle */
+typedef Math::Geometry::Rectangle<GLint> Rectanglei;
+
 /* Copying angle converters from Math namespace */
 using Math::deg;
 using Math::rad;

src/Math/Geometry/Rectangle.h

@@ -29,6 +29,7 @@ namespace Magnum { namespace Math { namespace Geometry {
 Helper class for storing axis-aligned rectangles consisting of bottom left and
 top right corner positions. Bottom left position is inclusive, while top right
 position is exclusive.
+@see Magnum::Rectanglei
 */
 template<class T> class Rectangle {
     public: