Make zoom functions more intuitive, allow animating zoom?

[rgrams]

Refer to this forum post (Space Shooter dev diary)

• Instead of "set_ortho_scale" and "get_ortho_scale", it should probably just be "set_zoom" and "get_zoom".
  • Would then need to flip the scale/zoom value. 1/x.
• Stop trying to have a zoom function that works for ortho and perspective cameras? Let people using perspective cameras change the Z position themselves?
  • Or make it work the same way for perspective cameras - figure out the necessary Z-movement to multiply the rendered area by the specified zoom value (at the camera's view distance).
    • (Or change FOV?...)
• See about allowing users to animate zoom.
  • The camera's zoom must be a property that gets updated with the module every frame.
  • Then users could animate this property directly - but it's not the most convenient. (have to get the right URL)
  • Have helper functions/messages? (animate and cancel_animations)