Math: using Rad for Matrix4::perspectiveProjection().

Also updated dependent functions and tests.

src/Math/Matrix4.h

@@ -216,15 +216,15 @@ template<class T> class Matrix4: public Matrix<4, T> {
 
         /**
          * @brief 3D perspective projection matrix
-         * @param fov           Field of view angle (horizontal, in radians)
+         * @param fov           Field of view angle (horizontal)
          * @param aspectRatio   Aspect ratio
          * @param near          Near clipping plane
          * @param far           Far clipping plane
          *
          * @see orthographicProjection(), Matrix3::projection()
          */
-        static Matrix4<T> perspectiveProjection(T fov, T aspectRatio, T near, T far) {
+        static Matrix4<T> perspectiveProjection(Rad<T> fov, T aspectRatio, T near, T far) {
-            T xyScale = 2*std::tan(fov/2)*near;
+            T xyScale = 2*std::tan(T(fov)/2)*near;
 
             return perspectiveProjection(Vector2<T>(xyScale, xyScale/aspectRatio), near, far);
         }

src/Math/Test/Matrix4Test.cpp

@@ -200,7 +200,7 @@ void Matrix4Test::perspectiveProjectionFov() {
                      {      0.0f, 9.788454f,         0.0f,  0.0f},
                      {      0.0f,      0.0f,  -1.9411764f, -1.0f},
                      {      0.0f,      0.0f, -94.1176452f,  0.0f});
-    CORRADE_COMPARE(Matrix4::perspectiveProjection(deg(27.0f), 2.35f, 32.0f, 100), expected);
+    CORRADE_COMPARE(Matrix4::perspectiveProjection(Deg(27.0f), 2.35f, 32.0f, 100), expected);
 }
 
 void Matrix4Test::fromParts() {

src/SceneGraph/Camera3D.h

@@ -83,7 +83,7 @@ class MAGNUM_SCENEGRAPH_EXPORT Camera3D: public AbstractCamera<3, T> {
 
         /**
          * @brief Set perspective projection
-         * @param fov           Field of view angle (horizontal, in radians)
+         * @param fov           Field of view angle (horizontal)
          * @param aspectRatio   Aspect ratio
          * @param near          Near clipping plane
          * @param far           Far clipping plane
@@ -91,7 +91,7 @@ class MAGNUM_SCENEGRAPH_EXPORT Camera3D: public AbstractCamera<3, T> {
          *
          * @see setOrthographic(), Matrix4::perspectiveProjection()
          */
-        Camera3D<T>* setPerspective(T fov, T aspectRatio, T near, T far);
+        Camera3D<T>* setPerspective(Math::Rad<T> fov, T aspectRatio, T near, T far);
 
         /** @brief Near clipping plane */
         inline T near() const { return _near; }

src/SceneGraph/Camera3D.hpp

@@ -46,7 +46,7 @@ template<class T> Camera3D<T>* Camera3D<T>::setPerspective(const Math::Vector2<T
     return this;
 }
 
-template<class T> Camera3D<T>* Camera3D<T>::setPerspective(T fov, T aspectRatio, T near, T far) {
+template<class T> Camera3D<T>* Camera3D<T>::setPerspective(Math::Rad<T> fov, T aspectRatio, T near, T far) {
     /** @todo Get near/far from the matrix */
     _near = near;
     _far = far;