lengthUnitsPerMeter property
How many of the world's length units make up one meter, or null to leave the length unit alone.
Forwarded to initializeForge2D in onLoad. The length unit is process-wide and cannot change once a physics world exists, so this can only be set through the constructor, and games that run at the same time have to agree on it.
Implementation
final double? lengthUnitsPerMeter;