Camera.
typedef struct Camera { uint sig; byte wobj[704]; } Camera;

Get position.
API M4f CameraGetPos(Camera *camera);
camera: Camera.
returns: Position.

Set background color.
API void CameraSetBgd(Camera *camera, Color color);
camera: Camera.
color: Color.

Set position.
API void CameraSetPos(Camera *camera, M4f pos);
camera: Camera.
pos: Camera position.

Set focal ratio. .1f=wide to 3.0f=narrow. Default=.4f.
API void CameraSetFocalRatio(Camera *camera, float fr);
camera: Camera.
fr: Focal ratio.

Set view distance.
API void CameraSetViewDist(Camera *camera, float dist);
camera: Camera.
dist:

Set normalized viewport bounds.
API void CameraSetViewPort(Camera *camera, float x1, float y1, float x2, float y2);
camera: Camera.
x1: Left.
y1: Top.
x2: Right.
y2: Bottom.

Initialize camera. Z and N together uniquely identify camera.
API void CameraInit(Camera *camera, M4f pos, uint z, uint n);
camera: Camera.
pos: Position.
z: Z order.
n: Camera index.

Release camera.
API void CameraRel(Camera *camera);
camera: Camera.