topic Re: How to create Z-offset Extrusion via API in Revit API Forum

How to create Z-offset Extrusion via API

YaGitHub — Mon, 13 Jul 2020 11:55:59 GMT

Hi, kinds!

I wanna make a function for creating Extrusion easily like that:

Extrusion createExtrusionZ(CurveArrArray pProfile, double bottom, double height) { // mm to feet double bottomF = mmToFeet(bottom); double heightF = mmToFeet(height); // create Sketch Plane Plane pPlane = Plane.CreateByNormalAndOrigin(new XYZ(0.0,0.0,1.0),new XYZ(0.0,0.0,bottomF)); SketchPlane pSketchPlane = SketchPlane.Create(_rvtDoc, pPlane) as SketchPlane; // return new Extrusion bool bIsSolid = true; return _rvtDoc.FamilyCreate.NewExtrusion(bIsSolid, pProfile, pSketchPlane, heightF); }

I expect that extrusion from [bottom] to [bottom + height] at Z direction, but I get that from [0] to [height] always.

I suspect that the way to create SketchPlane is mistaken, but I don't have any certain idea.

Could you give me a hand, gentles?

Re: How to create Z-offset Extrusion via API

RPTHOMAS108 — Mon, 13 Jul 2020 12:09:30 GMT

Try putting your start Z values into the points in your profile.

Re: How to create Z-offset Extrusion via API

YaGitHub — Thu, 16 Jul 2020 02:46:33 GMT

Thank you, Sir.

I could understand the specification of NewExtrusion-function.

But I wanna make a function as I posted. Therefore I did like below:

Extrusion createExtrusionZ(CurveArrArray pProfile, double bottom, double height) { // mmToFeet double bottomF = mmToFeet(bottom); double heightF = mmToFeet(height); // make sketch plane Plane pPlane = Plane.CreateByNormalAndOrigin(new XYZ(0.0,0.0,1.0),new XYZ(0.0,0.0,0.0)); SketchPlane pSketchPlane = SketchPlane.Create(_rvtDoc, pPlane) as SketchPlane; // make Extrusion bool bIsSolid = true; Extrusion newExtrusion = _rvtDoc.FamilyCreate.NewExtrusion(bIsSolid, pProfile, pSketchPlane, heightF); // move Extrusion XYZ transPoint = new XYZ(0.0, 0.0, bottomF); ElementTransformUtils.MoveElement(_rvtDoc, newExtrusion.Id, transPoint); return newExtrusion; }

Step 1 : Make new Extrusion attached to Z=0

Step 2 : Move the Extrusion to expected Z

🧐

Re: How to create Z-offset Extrusion via API

RPTHOMAS108 — Thu, 16 Jul 2020 22:43:47 GMT

Intuitively it would seem that the plane would set the z value as you had it but apparently not.

I don't know if there is a better option than moving the item after creation to enable you to have the same form of function. Curves in the profile can be iterated and transformed to new Z but I don't know if that would be advantageous or not.