My topics for today are:
I am still meeting with my European DevTech colleagues here in Konk Leon, 'anse du Lèon', the cove of the lion, aka Le Conquet, Brittany.
Yesterday, one of our topics was work we have done so far for cloud and mobile applications. It was very interesting to hear about my peers' rich and varied experiences.
I documented all my own experiences so far here on the blog, and was able to reuse that for my presentation quite spontaneously with no further preparation:
As I explained at the time, all of the explorations involving SVG are part of a larger master plan.
This plan has now matured to a certain extent and is forcing me to move ahead quite fast in the immediate future.
The main outcome so far is a presentation proposal that I submitted for the internal Autodesk technical summit taking place in June, and the fact that it was accepted.
My cloud and mobile roadmap is thus now clearly focused on implementing that proposal:
I described the roadmap I envision in the discussion of my simple SVG editor. The main components include:
Here is the actual wording of my technical summit proposal:
Two of the important components whose implementation I plan to explore next are the polygon generation and data model:
The generation of the room boundary polygons is obvious, since the room has a boundary property.
For the furniture and equipment family instance, the solution is a less immediate. My current idea is to explore making use of the ExtrusionAnalyzer class. It is supplied a solid geometry, a plane, and a direction. From those, it calculates the outer boundary of the shadow cast by the solid onto the input plane along the extrusion direction. As far as I can tell, that should be exactly what I need.
Scott Conover mentioned this class in his session on the Geometry API, a continuation of his AU 2011 presentation CP4011 'Geometric Progression: Further Analysis of Geometry Using the Autodesk Revit 2012 API', enhanced for the Revit 2013 API.
As soon as I have the polygons determined, I want to implement functionality to render them easily. This will involve extent calculation, canvas definition, and coordinate system transformation. I will probably implement a simple .NET geometry viewer before moving on to the SVG rendering. I've been wanting to do that for a long time...
So far, my colleagues have been focusing on using the Amazon and Azure cloud hosting services, and many discussions on the cloud and mobile DevBlog deal with them.
I searched the Internet for other cloud-based database alternatives, and right now CouchDB looks pretty promising, so I might try a completely different approach using that instead.
There is a lot to do here as well: define the data model, set up the web service, define a format for saving the polygon data, etc. At the very least, I will need to manage:
Round tripping the information will be interesting, especially if I want the Revit model to update automatically when furniture positions are modified on the mobile device, which I certainly do, if only for the wow effect :-)
... Oh, and, yeah, wish me luck!
Returning to the desktop again, here is a recent question from a developer on using estorage data in a schedule that leads to some general observations on that topic:
Question: I would like to display my extensible storage information in a schedule. I searched high and low, though, and was unable to find any samples or documentation on the subject. Can you help?
Answer: There is a good reason why you have not found anything: there is no such support.
The usage of extensible storage data is utterly and completely up to the add-in itself. The Revit API offers no support whatsoever for making use of estorage data in any way. The only support provided is for storage and retrieval, nothing else.
Well, one tiny little detail more: if an element id value is stored, and the element id is later modified by some worksharing operation, its value will be automatically updated.
On the other hand, there is currently no direct support for putting data into a schedule either.
I am no user interface expert, but I think that you can set up a schedule to be populated from certain parameter values via the user interface. You would have to talk with an application engineer or product support or explore this topic on the Internet to find out how that can be done.
Of course, there is nothing stopping you from extracting your data from extensible storage and transferring it into parameters set up to populate a schedule yourself.
I hope that answers your question and helps you get started successfully.