Direction vector

Hi folks,
I can't get this right. Sometime a go I posted a topic on CreateRay(). I got a (spherical?) example which was awesome, and I could play around with it to some degree. But I'm not grasping how I can expand on this.
Instead of a spherical lens, if I have two angles that I want to 'add' to my camera's rotation, how do I create a direction vector from the camera matrix with this? How would this look in math/coding terms with the following added to the camera rotation:
yaw = 4.5° pitch = 3.7°
I'm trying to create a direction vector that's based on two angles from my camera's centre. So 4.5° left/right and 3.7° up/down kind of thing.
WP.

Hi wickedP, thanks for reaching out us.
With regard to your request, the solution is pretty easy: using the GetRotationMatrixX() and GetRotationMatrixY() you get two transformation matrixes that in the end should be multiplied by your camera transformation matrix.
In Python it looks like# get the cam cam = doc.GetActiveObject() #get the ray (it's just another camera with 0.2 aperture) ray = cam.GetNext() # create the yaw and pitch matrixes pitchMatrix = c4d.utils.MatrixRotX(c4d.utils.DegToRad(3.7)) yawMatrix = c4d.utils.MatrixRotY(c4d.utils.DegToRad(4.5)) # combine them and set the ray tranformation matrix ray.SetMg(pitchMatrix * yawMatrix * cam.GetMg()) c4d.EventAdd()

Thanks Ricky,
but I'm not sure if that's what I'm after. That looks like normal object rotation, but I'm trying to make a direction vector. The example given in a previous post did something like this:
CreateRay(Ray* dst,Real x,Real y) { CameraMatrix = MyCam>GetMg(); Vector H = CameraMatrix.v1; Vector V = CameraMatrix.v2; Vector A = CameraMatrix.v3; Vector direction_vector = H + V + A; // how do I "add" 4.5° yaw to the direction_vector? // similarly for pitch dst>v = direction_vector; dst>p = CameraMatrix.off; }
How do I "add" 4.5 degrees to the yaw with something like this (taking into account the camera's rotation as well)? I'd like to see the math so I can play around with that.
If it's easier, think of it like this  I'm trying to create the standard camera ray without any lens effects (trying to keep it simple). How is the standard camera ray done?
WP.