topic Re: Modify the arc size of the Revision Cloud in Revit API Forum

Modify the arc size of the Revision Cloud

SimonaQQ — Thu, 01 Jul 2021 01:57:39 GMT

I want to modify the arc size of the Revision Cloud, such as in the figure, so that they are all the same and consistent. Can I do this? What should I do?
I know there is an arc length parameter in Revision, but it is the maximum arc length. What I want is the same arc length.
I tried to modify the geometry of the Revision Cloud, but they were read-only.
I look forward to your suggestion.

Revision Cloud

Re: Modify the arc size of the Revision Cloud

jeremy_tammik — Thu, 01 Jul 2021 08:10:48 GMT

Can you achieve what you want manually through the end user interface?

If not, it will probably not be possible programmatically either.

If you can, please analyse exactly how the modification affects the element properties.

The RevisionCloud documentation says:

https://www.revitapidocs.com/2022/43bdb2c4-2b9c-e3fa-4d6a-8c9970a9f7b6.htm

> RevisionClouds are created from a collection of sketched curves. Each curve will have a series of "cloud bumps" drawn along it to form the appearance of a cloud. There is no requirement that the curves form closed loops.

Such a list of curves can be passed in to the constructor:

https://www.revitapidocs.com/2022/090c0da6-db59-d1e6-5dcf-4335c531ee9f.htm

It provides some more information on how these curves are interpreted and used:

> The cloud graphics will be attached to the curves under the assumption that each curve is oriented in a clockwise direction. For lines, this means that the outside of the cloud is in the direction of the line's normal vector within the View's plane. Any closed loops should therefore be oriented clockwise to create the typical cloud shape.

I imagine the following:

The individual cloud bumps are not editable
The individual curve length (distance from start to end point) will determine the size of its cloud bump
The sketch curves cannot be modified after creation

All of these statements are guesses. Please correct me if I am mistaken. Thank you!

Cheers,

Jeremy

Re: Modify the arc size of the Revision Cloud

RPTHOMAS108 — Thu, 01 Jul 2021 11:42:29 GMT

I don't think arc length is the best description in revision clouds settings. Each segment contains two arcs which increase to a maximum size noted in the settings before a new segment is added.

You can get RevisionSettings object by filtering from the document.

Relevant property is RevisionSettings.RevisionCloudSpacing

Also this setting is global, not stored on cloud instance (so previously drawn clouds will be affected by changes to it).

Re: Modify the arc size of the Revision Cloud

SimonaQQ — Fri, 02 Jul 2021 03:08:01 GMT

Thank you very much for your advice.
I really don't know how to describe it, but fortunately you understand me.
What I want to change is actually the size of the two arcs in each segment. I hope they can keep the same size, not one big one small one.
Do you know how to change them or implement them through the end user interface?
This will help me a lot. Thank you very much.

Re: Modify the arc size of the Revision Cloud

jeremy_tammik — Fri, 02 Jul 2021 07:40:50 GMT

If really needed, you might be able to create your own detail curves to represent the revision cloud geometry and hide the original geometry.