topic Re: The methode Curve.CreateOffset seams to have troubles in Revit API Forum

The methode Curve.CreateOffset seams to have troubles

BenoitE&A — Tue, 11 Jul 2017 12:37:34 GMT

Hi,

Here is my problem :

I created a line, maLigne.

Then I apply a transformation, either this :

Transform transformation = Transform.CreateTranslation(vecteurNormal);

resultat = maLigne.CreateTransformed(transformation) as Line;

or that

resultat2 = maLigne.CreateOffset(monMur.WallType.Width / 2, vecteurNormal) as Line;

The 2 transformed lines are not the same !! In fact only the first is correct, the solution using createOffset is not (my vector vecteurNormal is in the XY plane and the offset direction is taken as the Z axis.

I guess there is a problem in the code of the function...

Sincerely

Benoit

Re: The methode Curve.CreateOffset seams to have troubles

Revitalizer — Wed, 12 Jul 2017 06:06:16 GMT

Hi,

in the RevitAPI.chm file, Curve.CreateOffset has a "Remarks" section counting more than 700 words, making it one of the best documented methods.

Ships with the Revit API SDK.

Revitalizer

Re: The methode Curve.CreateOffset seams to have troubles

BenoitE&A — Thu, 13 Jul 2017 12:47:40 GMT

Ok you are right, the offset direction is taken as the cross product of the tangeant vector to the curve and the vector taken as argument in CreateOffset. But I don't get why this choice was made.

Whatever, Transform works better for my purpose.

Thanks anyway.