# Pitch camera around model

Currently, my camera rotates with my model's Y-Axis (yaw) perfectly. What I'm having trouble with is rotating the X-Axis (pitch) along with it. I've tried the same method for cameraYaw() in the form of cameraPitch(), while adjusting the axis to Vector.Right, but the camera wouldn't pitch at all in accordance to the Y-Axes of the controller.

Is there a way similar to this to get the same effect for pitching the camera around the model?

// Rotates model on its own Y-axis
{

}

// Orbit (yaw) Camera around model (camTarget is the model's position)
public void cameraYaw(Vector3 axis, float yaw)
{

}

public void updateCamera()
{
cameraYaw(Vector3.Up, Yaw);
}


It looks to me like all you would need to do to pitch around an object is call the cameraYaw method with as first argument Vector3.Backward. This way you will rotate around the Z axis (pitching) instead of around the Y axis (yawing).

If you want to both pitch and roll at the same time you will need to create an arcball camera. I've written a code snippet for XNA that gives you a very simple arcball camera. Just set the look at to where your model is, use zoom to zoom out from your model and start manipulating the pitch and yaw variables http://roy-t.nl/index.php/2010/02/21/xna-simple-arcballcamera/

To not leave you with just a link here is the most important part of the code.

            //Calculate the relative position of the camera
position = Vector3.Transform(Vector3.Backward, Matrix.CreateFromYawPitchRoll(yaw, pitch, 0));
//Convert the relative position to the absolute position
position *= zoom;
position += lookAt;

//Calculate a new viewmatrix
viewMatrix = Matrix.CreateLookAt(position, lookAt, Vector3.Up);


As you can see I first transform a vector that points to (0,0,1), that is towards the player sitting behind the monitor, given a yaw, pitch and roll. After that I still have a normalized vector but it's pointing to where I want the camera to be. I then scale the vector so that the camera is the distance from the model that. After that I move the vector so that it orbits the model instead of (0,0,0). Finally I create the viewmatrix that you can pass to your effect.