How to change document model units

Rhino Developer
1

Hi,i am trying to write a import plugin with c#.But i can’t find the way to modify the document model units before read the file.Can anyone help me?

2

First of all, make sure you have created a File Import plug-in. Then, in the method where you read the file, you can do the following to adjust the model unit system of the document:

protected override bool ReadFile(string filename, int index, RhinoDoc doc, FileReadOptions options)
{
    doc.AdjustModelUnitSystem(UnitSystem.Millimeters, false);
    // read stuff
    return true;
}
3

Thank you!but i am using Rhino.Net,not Rhinocommon.Is it the same methods?

4

Oh, ok. Then you need to do something along the lines of

MRhinoDoc doc; // defined elsewhere
On3dmUnitsAndTolerances unitsAndTolerances = 
    new On3dmUnitsAndTolerances(doc.Properties().ModelUnitsAndTolerances());
unitsAndTolerances.m_unit_system.m_unit_system = IOn.unit_system.millimeters;
doc.Properties().SetModelUnitsAndTolerances(unitsAndTolerances);

As you can see from the complexity of the two code snippets, I can’t encourage you enough to switch to RhinoCommon :smile:

5

OK,i’ll try to switch!Thanks!

6

I have an other question.which method can replace the “MRhinoDoc::SetTitle”?

7

I don’t understand the question. What are you trying to do and why?

Thanks,

– Dale

9

I’am trying to set the document title after reading the file.such as

Pasted image916×187 10.2 KB

10

And you are trying this with RhinoCommon, right?

11

yes!

12

is there any way to change whole rhino unit to meters ?
tnx ( c# , pure plugin )

13

For one document, use:
doc.AdjustModelUnitSystem(UnitSystem.Meters, false);

see

///

If you want to load which units get loaded into a default blank document, you need to adjust which template is loaded, using Tools > Options > Files > Template files > Default

It looks like that can be changed programmatically with https://developer.rhino3d.com/api/RhinoCommon/html/P_Rhino_ApplicationSettings_FileSettings_TemplateFile.htm

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