You don't really check the templates - you just ask the current model the user is using. The current model might be of a different unit than their selected template.
At my previous job we switched a lot between mm and m in our project files.
You use model.options to inspect the current model's options:
options_manager = Sketchup.active_model.options
options_manager.keys.each { |options_provider_name|
puts options_provider_name
options_provider = options_manager[options_provider_name]
options_provider.each { |key, value|
puts "> #{key} - #{value}"
}
}
Output from that snippet:
PageOptions
> ShowTransition - false
> TransitionTime - 2.0
UnitsOptions
> LengthPrecision - 0
> LengthFormat - 0
> LengthUnit - 2
> LengthSnapEnabled - false
> LengthSnapLength - 0.03937007874015748
> AnglePrecision - 1
> AngleSnapEnabled - true
> SnapAngle - 15.0
> SuppressUnitsDisplay - false
> ForceInchDisplay - false
SlideshowOptions
> LoopSlideshow - true
> SlideTime - 1.0
NamedOptions
PrintOptions
> PrintWidth - 8.5
> PrintHeight - 11.0
> ComputeSizeFromScale - false
> SizeInPrint - 1.0
> SizeInModel - 1.0
> VectorMode - false
> FitToPage - true
> NumberOfPages - 1
> LineWeight - 0.5
> PixelsPerInch - 150.0
> SectionSlice - false
> ModelExtents - true
> PrintQuality - 0
> ScaleAdjustment - 1.0
> QualityAdjustment - 1.0
So in this case you want to inspect UnitOptions:
model = Sketchup.active_model
model.options["UnitsOptions"]["LengthUnit"]
Note that you want to use the constants in the class Length against the values returned here.
Length;;Decimal
Length;;Architectural
Length;;Engineering
Length;;Fractional
Length;;Inches
Length;;Feet
Length;;Millimeter
Length;;Centimeter
Length;;Meter
So something like this:
model = Sketchup.active_model
unit_type = model.options["UnitsOptions"]["LengthUnit"]
metric = case unit_type
when Length;;Millimeter, Length;;Centimeter, Length;;Meter
true
else
false
end
I'm doing this check because LengthFormat got options that can be used with both imperial and metric units.
