1000 / 60
A flag that specifies whether the runner is running or not.
true
A Boolean that specifies if the runner should use a fixed timestep (otherwise it is variable).
If timing is fixed, then the apparent simulation speed will change depending on the frame rate (but behaviour will be deterministic).
If the timing is variable, then the apparent simulation speed will be constant (approximately, but at the cost of determininism).
false
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A
Numberthat specifies the time step between updates in milliseconds. Ifengine.timing.isFixedis set totrue, thendeltais fixed. If it isfalse, thendeltacan dynamically change to maintain the correct apparent simulation speed.