Full Version: Export nurbs curve details

Hi all,

I check javascript API and it seems there is only a generic Curve object that represent every curve?
Is it possible to obtain nurbs representation (control points, degree, knot vector) of a curve in geometrydatabase?

Thanks

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Hi miquik ,

re:
> Is it possible to obtain nurbs representation (control points, degree,
> knot vector) of a curve in geometrydatabase?

Sorry no that low level NURBS information is not currently set up to be accessed by script. What is it that you're trying to do that you need this level of data?

- Michael

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Thanks Michael,
I am try to create a script to export geometry to SVG. I’m not really interested in nurbs informations, it will be suffice to have curve tessellation points

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Hi miquik, there is an evaluator available to scripts, see the "scripting" section here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=8814.1

Or also you can use the factory for the "ArrayCurve" command to generate points at equal distances along a curve, see the ReconstructCurve command for an example:
http://kyticka.webzdarma.cz/3d/moi/#ReconstructCurve

There will likely be SVG support coming for MoI v5.

- Michael

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Thanks Michael,
I would like to implement SVG export anyway now. I almost done, just one thing is missing: can I obtain viewport width/height? I need to create the projection matrix but these properties seem hidden.

Thanks

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Hi miquik,

re:
> I would like to implement SVG export anyway now. I almost done, just one thing is missing: can
> I obtain viewport width/height? I need to create the projection matrix but these properties seem hidden.

There are .pixelWidth and .pixelHeight properties on a viewport object, so something like:
var width = moi.ui.mainWindow.viewpanel.getViewport('3D').pixelWidth;

- Michael

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