<function name="GetAirDensity" parent="physenv" type="libraryfunc"> <description>Returns the air density used to calculate drag on physics objects. <validate>The unit is in `kg/m^3`.</validate> <validate>The unit is in `kg/m³`.</validate> </description> <realm>Shared</realm> <rets> <ret name="airDensity" type="number">Default value is 2.</ret> </rets> </function>