Camera Manipulation - ZigyTheBird/ZigysPlayerAnimatorAPI GitHub Wiki
The AbstractCameraModifier class allows you to make modifiers that move and rotate the camera by overriding the get3DCameraTransform method.
The playeranimatorapi:headposboundcamera
and playeranimatorapi:headrotboundcamera
modifiers are the two modifiers included with the mod using this feature.
The former making the camera moving according to the head animation, and the latter doing the same for rotation.
There is an example in the examples section making use of both.