I'd like to see a CAMERA_YAW parameter added to the command.

In an avatar follower application, you currently specify the point the camera's looking at as an X,Y,Z displacement relative to yourself (CAMERA_FOCUS_OFFSET parameter). You then specify the camera's position by its distance (CAMERA_DISTANCE) from the focal point and a pitch (CAMERA_PITCH) angle, basically a rotation around the Y axis, as if you were nodding up or down to look at the focal point.

I would like to see yaw as well (rotation around the Z axis, as if you were turning your head left or right. This would allow you to position a camera not only above or below your head to look at the focal point, but also to one side or the other.

I suggest the parameter be called CAMERA_YAW, that it also be a float value, in degrees, same as CAMERA_PITCH, and a range of, say, -45 degrees (rotated around to the left side of the head) to 45 (rotated around to the right side of the head).

Adding this should not break existing content, since only those parameters that are specified are used, so existing scripts using llSetCameraParams that don't call it won't miss it.