Oolite JavaScript Reference: Frame Callbacks

Frame callbacks are user-defined JavaScript functions that run on every single game "frame update".

Overview

These are faster than timers, which only fire 4 times a second. See Oolite JavaScript Reference: Timer for more on those.

Frame callbacks can be used for a number of purposes including animations

"shift-F" - Displays frame rate, object- and collision-counter and player's pwm-coordinates. (Only available in "Developer Release" versions of Oolite.)

Links

• The normal, widely-used standard for creating the callback function (Phkb, 2017)
• Jens Ayton explaining frame callbacks (2011)
• Animated Ships - Thargoid's animation OXP demo (at the bottom of the page) contrasts two flapping butterflies, one animated using Frame Callbacks, the other using Timers.
• Javascript optimization tips - see Frame rate for details of measurement.