Documented convenience functions on vectors and angles.

src/Math/Math.h

@@ -130,17 +130,23 @@ template<class Integral, class FloatingPoint> inline constexpr typename std::ena
 }
 
 /**
- * @brief Angle in degrees
- *
- * Function to make angle entering less error-prone. Converts the value to
- * radians at compile time. For example `deg(180.0f)` is converted to `3.14f`.
+@brief Angle in degrees
+
+Function to make angle entering less error-prone. Converts the value to
+radians at compile time. For example `deg(180.0f)` is converted to `3.14f`.
+
+Usable for entering e.g. rotation:
+@code
+Matrix4::rotation(deg(30.0f), Vector3::yAxis());
+@endcode
+@see rad()
  */
 template<class T> inline constexpr T deg(T value) { return value*Constants<T>::pi()/180; }
 
 /**
  * @brief Angle in radians
  *
- * See also deg().
+ * See deg() for more information.
  */
 template<class T> inline constexpr T rad(T value) { return value; }
 

src/Math/Matrix3.h

@@ -36,7 +36,7 @@ template<class T> class Matrix3: public Matrix<3, T> {
          * @brief 2D translation matrix
          * @param vec   Translation vector
          *
-         * @see Matrix4::translation()
+         * @see Matrix4::translation(), Vector2::xAxis(), Vector2::yAxis()
          */
         inline constexpr static Matrix3<T> translation(const Vector2<T>& vec) {
             return Matrix3<T>( /* Column-major! */
@@ -64,7 +64,7 @@ template<class T> class Matrix3: public Matrix<3, T> {
          * @brief 3D rotation matrix
          * @param angle Rotation angle (counterclockwise, in radians)
          *
-         * @see Matrix4::rotation()
+         * @see Matrix4::rotation(), deg(), rad()
          */
         static Matrix3<T> rotation(T angle) {
             return Matrix3<T>( /* Column-major! */

src/Math/Matrix4.h

@@ -38,7 +38,7 @@ template<class T> class Matrix4: public Matrix<4, T> {
          * @brief 3D translation matrix
          * @param vec   Translation vector
          *
-         * @see Matrix3::translation()
+         * @see Matrix3::translation(), Vector3::xAxis(), Vector3::yAxis(), Vector3::zAxis()
          */
         inline constexpr static Matrix4<T> translation(const Vector3<T>& vec) {
             return Matrix4<T>( /* Column-major! */
@@ -69,7 +69,7 @@ template<class T> class Matrix4: public Matrix<4, T> {
          * @param angle Rotation angle (counterclockwise, in radians)
          * @param vec   Rotation vector
          *
-         * @see Matrix3::rotation()
+         * @see Matrix3::rotation(), Vector3::xAxis(), Vector3::yAxis(), Vector3::zAxis(), deg(), rad()
          * @todo optimize - Assume the vectors are normalized?
          */
         static Matrix4<T> rotation(T angle, const Vector3<T>& vec) {

src/Math/Vector2.h

@@ -26,10 +26,22 @@ namespace Magnum { namespace Math {
 /** @brief Two-component vector */
 template<class T> class Vector2: public Vector<2, T> {
     public:
-        /** @brief %Vector in direction of X axis */
+        /**
+         * @brief %Vector in direction of X axis
+         *
+         * Usable for translation in given axis, for example:
+         * @code
+         * Matrix3::translation(Vector2::xAxis(5.0f)); // same as Matrix3::translation({5.0f, 0.0f});
+         * @endcode
+         * @see yAxis()
+         */
         inline constexpr static Vector2<T> xAxis(T length = T(1)) { return Vector2<T>(length, T()); }
 
-        /** @brief %Vector in direction of Y axis */
+        /**
+         * @brief %Vector in direction of Y axis
+         *
+         * See xAxis() for more information.
+         */
         inline constexpr static Vector2<T> yAxis(T length = T(1)) { return Vector2<T>(T(), length); }
 
         /** @copydoc Vector::Vector(T) */

src/Math/Vector3.h

@@ -26,13 +26,30 @@ namespace Magnum { namespace Math {
 /** @brief Three-component vector */
 template<class T> class Vector3: public Vector<3, T> {
     public:
-        /** @brief %Vector in direction of X axis */
+        /**
+         * @brief %Vector in direction of X axis
+         *
+         * Usable for translation or rotation along given axis, for example:
+         * @code
+         * Matrix4::translation(Vector3::xAxis(5.0f)); // same as Matrix4::translation({5.0f, 0.0f, 0.0f});
+         * Matrix4::rotation(deg(30.0f), Vector3::xAxis()); // same as Matrix::rotation(deg(30.0f), {1.0f, 0.0f, 0.0f});
+         * @endcode
+         * @see yAxis(), zAxis()
+         */
         inline constexpr static Vector3<T> xAxis(T length = T(1)) { return Vector3<T>(length, T(), T()); }
 
-        /** @brief %Vector in direction of Y axis */
+        /**
+         * @brief %Vector in direction of Y axis
+         *
+         * See xAxis() for more information.
+         */
         inline constexpr static Vector3<T> yAxis(T length = T(1)) { return Vector3<T>(T(), length, T()); }
 
-        /** @brief %Vector in direction of Z axis */
+        /**
+         * @brief %Vector in direction of Z axis
+         *
+         * See xAxis() for more information.
+         */
         inline constexpr static Vector3<T> zAxis(T length = T(1)) { return Vector3<T>(T(), T(), length); }
 
         /**