Invisible to be Visible?

This is what I would I consider to be an "old technique" but it has come up recently around the firm. How to make objects that are above the view's cut plane (in plan) visible (I suppose it might work in section/elevation, but I never tried).

If you've read the wonderful Revit series "Introduction to Revit Arch" & "Mastering Revit Arch" (both solid books, thanks to the authors, whom I've been meaning to blog about), you should already know that certain objects will show-up, even if they are above the cut plane of the view. All of the categories are categories that are "cut" in plan and it mostly has to do with architectural convention about showing some stuff in a plan, even if it is not "technically" visible in the plan.

So that works really great, for those categories. However, what if you have a light fixture (say a wall sconce) that you also want to show in your plan, but of course it is mounted at 5'-6" or 6'-0", what do you do! Even if you put in symbolic geometry it won't help, as the view is not cutting the object, or the object is not below the cut plane. One solution would be a plan region, but they can be wonky at best, and would you really want to do a plan region for every wall sconce...? Or meven worse, modify the cut plane for the whole view? More then one view ! What we really need, is way to convince Revit that it is "cutting" through the object, even when its not.

Enter the Invisible line, an unseen friend! Take your wall sconce family, and you'll note that among the various Line Types (really subcategories) available to you with which to draw lines is "". Now, simply draw a line from the reference level to your wall sconce geometry (you can do some align/locks if you so choose). Pop the family back into your project, and viola! You're sconce will show up in your plan, with no extra effort.

Now wait! You might say, what is going on. Quite simply Revit is obeying its own rules (kinda like Kirk in the Kobayashi Maru, but not really), while we can not "see" the invisible line, when Revit's view cuts through the line, its there, and it "sees" it, which means it sees the object. Since a light fixture is a "non-cuttable" category, that means Revit must render the fixture in projection, since this is a plan, that means to render the light fixture in projection would require that the "top" of the fixture be shown in the view. Therefore, the light fixture is displayed in plan the way you want it to, all because of a simple invisible line.

I've not done an exhaustive review, but I beleive invisible lines are only availble in families that belong to categories that do not cut (which would make sense), I'm also not sure if the line style shows up if you make a family first with a generic template, then change the category. I'll leave it up to you the reader to explore and learn on your own. I do know it works for light fixtures and speciality equipment (the two I deal with most often, and where the issue is most likely to crop up).

Classic Roman Architecture anyone...?

This started as a little "show & tell" to Zach, and now its a movie... (mine didn't work nearly as well as his).

I think this goes further to suggust what you can do with these tools to handle complex geometry we just could not model before. Easy? No! Cool? Yes!

Further disclaimer - Zach made the video, not me. I just got the conversation started..... (my panel didn't work nearly as well as his)

When E is not... E?

I was working on a family here at the company, and it turned out we need to use a formula that involved using a Log function (you remember Calculus right? Cause I don't.....). In excel the Natural Log (that is the log taken of e, your handy dandy mathematical constant) is notated with the function ln(). Which is fine and dandy. If you look in Revit help under valid syntax, is conveniently says that the "log" can be taken of any number, what they fail to mention is the base the Revit log function operates in, which is 10, not e (bummer :( )

But....! If you do enough research (or remember enough Calculus) you find out that Logs in base 10, can be converted to Logs in another base, by some simple alegabra. (hooray!) Even better, Revit help clearly states that the function exp() will raise e to the specified power, so therefore we could write:

= log()/log(exp(1))

and we would get the result we need, since a number raised to the power of 1, will simply be the original number. This is good, because theoretically this means that Revit (and or your computer) will use e calculated to the most accurate value the program (Revit) will accept (you're still with me, right?).

Yet, for some reason, Revit's result did not agree with Excel . With a little more help from some friends (read the whole AUGI thread here) it was discovered that the function exp() resulted not in raising e to the specified power, but 10!!! So, exp(1) = 10 in Revit, contradicting Revit's own help documenation!

Now I ask, why would we ever need a function that raises 10 to a power? I can always write: 10^2, 10^2..... I can even use parameters for both values if I need to, 10 is a number, not too hard to deal with. I would much rather have access to e particularly since I need it!

For now, we're using a truncated value for e in our formula, and its close enough, but I would say, with relative certainty that somewhere (quite a long time ago) someone made a mistake...

Not that too many people are running around using Logs and e in their Revit formulas, but with the advent of the new massing tools, it could become a possibilty. Besides, its the principal of the matter, right, we should have access to our standard mathematical functions, and the documentation should be correct!

Streaming Revit!?

Autodesk Labs has come out with something new and interesting. The ability to test drive and stream apps from their servers:

Project Twitch

This is really interesting to me, as it means that potentially we could do something very similiar internally, or, eventually, like many "cloud computing" applications, we need only pay for how much access we require to applications like Revit, Maya, Autocad, and our IT deptartment does not have to worry about maintaing the high powered comptuers or software.

Now, I realize that likely in the short to medium term server side apps will not replace the functionality of having something like Revit or Maya local on your computer, however, with a decreasing need for 2D Autocad, I could see high value in being able to "buy direct" from Autodesk, how much, and when we need access.

The future really is coming...

Steve Stafford recently had a really good post about "the future" here is another.

Indiana University has released BIM standards for project delivery, to be followed by BIM contracts. They cite a number of sources I'm familiar with, including the State of Wisconsin, which has also released BIM standards.

These standards are real, and they're detailed. Generally I don't take much issue with them, and most of them assume you're working Revit. However, I did note in IU's standards they require all wall finishes and materials to be included... paint anyone? It will be interesting to see how all this plays out. I have to assume that any of these organizations are willing to negotiate once you get to the table, since most of them require some sort of "plan" with regards to how the design team and contractors will work together, and the required model deliverables.

WE'VE MOVED!

We apologize for the lack of posting recently. For those who don't know .... you guessed it ......

WE MOVED!

Some of you who come to Boston RUG meetings will know this but we've moved to Boston!

And in case you didn't know this is Robert's wife Krista posting because I got tired of waiting for him to "get around to it". Thanks for the patience and we hope to get back to our regularly scheduled Revit posting soon.

An eye into the future.

I'm a little slow on the blogging here, but very excited to see this new tool released at Autodesk Labs: Revit Solar Radiation Tool

This is the kind of melding of design and anaylsis tools I've been waiting to see for a long time, just waiting to give it a try here. Note you need to update your Revit 2010 install with the latest service pack according to the info on their page.

In other news, I should mention that AUGI: AEC Edge, the new quarterly magazine focused on technology in the Design and Construction industry is out, and I'm in it, along with many other fabulous authors, give it a read when you get a chance.

AU classes

I'm happy to report that my two courses on Project Templates (an UnConference Session and a 90 minute class) were accepted for AU 2009. Assuming everything is scheduled properly the "conclusions" of the Unconference discussion will be incorporated into the 90 minute class (should make handouts a challenge ;) ). If people have thoughts on what makes a good (or bad) Project Templates, feel free to either comment or drop me a line via e-mail. I'm also looking forward to a good discussion at the UnConference session.

edit: Thanks to everyone and anyone who voted for my sessions.

Cheers,
-R

Fun with Rigs

Fun with Rigs thanks to Zach's latest post. I don't know what it is, but it was fun to build, and it doesn't break!

Classic UI in 2010.....?

Hopefully Phil can shed some additional light on this subject.....?

Are you a contractor, looking for work?

So if you follow this blog at all, you know we are planning and designing a new home for ourselves to be built in southeastern Massachusetts (AKA the South Shore).

The house design uses SIPs for the exterior walls and we've been working very closely with a company located in New Hampshire who will be providing our exterior walls, roof(s) and floor system(s). We're still not sure what the foundation will be (we've looked closely at ICF's).

There is a great deal of interesting information out and about these days with regards to how a house can be "pre-fabricated" but not in the terms of building giant pieces of house that get shipped down the highway. One might call this a "hybrid" approach to prefabrication (don't miss a very good rebuttle). Some of this information is old news, but I've found it useful.

To get to the point, we're preparing to do an RFP process for GC's to help us build our house. We're looking for smart, intelligent partners, both at the GC level and the subcontractors who will work for them to build our house cost effectively, and intelligently, to help save some money and help save our environment.

Think you're qualified (or know someone who is), interested in doing business in a new way, up for a challenge? Then get in touch!

Article of Interest

I'm not usually a big fan of the Architecture critic our local rag here in Philly, but for once she has a decent article: Changing Skyline: Building a McMini

Interestingly they're using SIPS, which is what we intend for our house (see previous post). Now I realize that prices don't scale linearly, but given their cost (around $100,000, not including land, etc.) I'm hopeful that we will be able to bring our house in at a reasonably price point too (do the math and they're somewhere around $100/sq ft).

House Renderings

Thanks to some tips from Buildz I've generated these recent renderings of our house design, doesn't it look warm and welcoming!


Also ran this interior rendering awhile ago:

2010 Graphic Error

This may just be my machine but when I switch scales I get the following image until I hover over the button with my mouse.




-K-


Edit: This happens with both hardware acceleration turned on and off.

Days of Our Revit (the software serial soap opera)

So just in case you've been hiding under a rock somewhere...

If you didn't know it, as a Revit user you are a supporting character in what has become a bit of a melodramatic soap opera. I've pretty much stayed out of the Revit 2010 debate for a variety of reasons, most of which I'll be happy to discuss in person, but not here.

However in case you didn't know, there is a bit of a raging debate that has hit new highs in the last few days. To catch up, you merely need to keep abreast of the following sites:

the main character

the brash, devilishly handsome male lead

the overprotective parents

the younger child, with an independent streak

the introspective old man

and lastly, you the supporting cast....

I never liked soap operas, and still don't. There are very valid opinions and thought out there, on both sides of the "issues". Some people might stir the pot a little more then others, but it seems foolish to not address the issues head on and in a civil, reasonable way. Action, reaction, and re-reaction are neither.

There are more links out there, and more blogs, this was just a sampling of what I tend to keep my eye on.

Batch Render for Revit....

Friend of mine has posted this handy script (modified journal file) for doing batch rendering out of Revit. "Set it and forget it" to process multiple views over the weekend on your powerhouse machine at work. One note, while testing found out that you need to have your project browser set to the default that comes standard in the ADSK project template. I see this as particularly useful for doing more in depth sun studies. I was recently wanting to do every 5 mins for about 2 hours for an interior room on our house design. Currently you can only do a minimum of 15 minutes over a 24 hour period. Using this script, you would have to set-up views for each moment in time, but would give you far more control. Think of it as "stop motion animation" for Revit... :) You could even animate doors and other stuff!

http://buildz.blogspot.com

Vote for AU

Vote for AU courses.

Robert Manna's Courses:
Good Revit Project Templates
Finding Value in Revit When You're Not Doing IPD
What makes a Good Project Template - Unplugged

Krista Manna's Courses:
Revit in Living Color
The Standardization of Revit: Are you stifling your firm's creativity - Unplugged

And last but not least our joint venture:

Residential IPD: How to use Revit with Pre-fabricated Structural Insulated Panels (SIPs)

Please feel free to vote for our courses. We're both very excited about these courses and look forward to teaching them.

Submit AU Courses

Don't forget that AU courses are due this week. That includes Un-plugged sessions.

AU Courses


-K-

Revit Apps

Handy Revit apps a colleague of mine collected on his blog.

STC is the way of the dinosaur

In response to Steve Staffords Blog post:

STC is no more. Now it's SWC. To me this is harder to say and awkward. I think I may just stick with saying "sync" from now but am saddened by the loss of the revit language. STC was one of those phrases that you knew you were part of an exclusive club being a "reviteer". Say the password and you get to join our club. Oh well. Autodesk obviously thought it was confusing to users. "Syncronizing" is more appropriate to what you are actually doing.

-K-