fixed setting of vertical FoV

include/ACGL/Scene/GenericCamera.hh

@@ -148,7 +148,7 @@ class GenericCamera
 
 		/**
          * Set the vertical field of view of the camera in degree.
-         * Aspect ratio will get changed!
+         * Horizontal FoV will get changed!
          * @param _fovv         New vertical field of view of the camera.
 		 */
         void setVerticalFieldOfView( float _fovv );

src/ACGL/Scene/GenericCamera.cc

@@ -163,7 +163,10 @@ void GenericCamera::setVerticalFieldOfView(float _fovv)
     // we only save the aspectRatio and the horizontal FoV
 	// so if we change the vertical FoV, we change the aspectRatio
 	
-    mAspectRatio = tan( calcDegToRad(0.5f * mHorizontalFieldOfView) ) / tan( calcDegToRad(0.5f * _fovv) );
+    //mAspectRatio = tan( calcDegToRad(0.5f * mHorizontalFieldOfView) ) / tan( calcDegToRad(0.5f * _fovv) );
+
+    float x = tan( calcDegToRad(0.5f * _fovv) ) * mAspectRatio;
+    mHorizontalFieldOfView = calcRadToDeg( 2.0f * atan( x ) );
 }
 
 float GenericCamera::getVerticalFieldOfView() const
@@ -215,7 +218,7 @@ glm::mat4 GenericCamera::getStereoViewMatrix( bool _leftEye, StereoMode _stereoM
         // just shift the camera position to the left/right by half the eye-distance
         //
 
-        ACGL::Utils::debug() << "WARNING: getStereoViewMatrix() is not tested yet" << std::endl; // remove after testing
+        //ACGL::Utils::debug() << "WARNING: getStereoViewMatrix() is not tested yet" << std::endl; // remove after testing
 
         glm::mat3 inverseRotation = getInverseRotationMatrix3();
         glm::vec3 eyePosition = mPosition + (inverseRotation * glm::vec3(cameraPositionShiftValue,0.0f,0.0f) );