Month: July 2012

Chameleon – Grasshopper and Revit interop plugin

Luke Johnson

A lot of you may have heard about it already, but if you haven’t:
Chameleon is a plugin for both Grasshopper and Revit with a focus on interoperability, simulation, and efficient practice workflows. Chameleon’s main advantage is its ability to facilitate easy transfer of geometric data between Grasshopper and Autodesk Revit, but also includes other valuable tools to make life easier, both in Grasshopper and Revit.

This latest version includes upgraded the functionality of the Curtain Grid management tools for Revit users. These tools now allow control of curtain panels in addition to the grids and mullions. There is also a preview to show the results of changes before accepting.
via
CHAMELEON � HIROSHI JACOBS

Heads-up / read more:
http://www.formfollowsperformance.com/2012/07/chameleon-grasshopper-revit-geometry-transfer-and-edit-params/

Steve’s post:
http://revitoped.blogspot.com.au/2012/07/chameleon-for-grasshopper-and-revit.html?spref=bl

More Grasshopper resources:
Perkins+Will Grasshopper Users Group

On a slightly unrelated note:
Video showing point based parametric functionality from Grasshopper to Revit Adaptive component (more about Geometry Gym here):

Revit Model Exporters via The Building Coder – OBJ STL IFC

Luke Johnson

Quote:

To follow up the discussion of my quick and dirty Revit model OBJ exporter, I want to point out that Adam Nagy completed his series of posts on the AEC DevBlog on a Revit model exporter and viewer for iOS using an even more minimalistic custom data format for uploading to the cloud and viewing on an iOS mobile device:

  • Part 1: Revit add-in to upload geometry data to a storage service
  • Part 2: An iOS application to download and display the model using OpenGL
  • Part 3: Interactive view orientation and manipulation using gestures

While the OBJ format I looked at is more heavy-weight than Adam’s minimal custom format, my implementation includes some other enhancements which make it quite effective as well.
I have also heard of other home-grown viewer implementations with some support for switchback, individual element tagging and object identification based on VRML and on the Unity gaming engine.
If you are interested in a finely tuned exporter with more complete coverage and control over what gets exported, you might want to take a look at the open source STL exporter.
Finally, for high-end exporter requirements, the Revit IFC exporter is also open source.

 via
The Building Coder: Running Language Code and More Exporters

Use a Section Box to quickly find Warning Elements

Luke Johnson

You have a project with heaps of Warnings / Errors, but you are struggling to find the associated elements.  Here is a quick way:

  1. The first problem is that not all of us can remember 6 random digits easily, but we also can’t copy the element ID direct from the Warnings box (yet).  So… I use Notepad++ (you could easily use Firefox or IE – all of these programs all you to Reload the source error report HTML file when you re-export it).  
  2. Export your Error Report to some neutral location like C:TEMP  
  3. Open the Error Report in Notepad++ / Firefox / IE (you could also use this method if you prefer)
  4. Now you can simply copy the element ID to the Clipboard (Ctrl+C)
  5. Go to a 3D view in which the element will be visible (use the 33 reasons if you need to)
  6. Use Select by ID (tear it off the Ribbon if you like by holding Ctrl)
  7. Paste the Element ID (Ctrl+V)
  8. Use COINS Auto Section Box
  9. Your Warning / Error element will be visible and highlighted

Color Fill Schemes and View Templates

Luke Johnson

I have run into an issue when using a Key Schedule, Area Plan and View Template.  My Area Plan uses a Color Fill Scheme which uses a Key Schedule as its basis for the different colors of shading. If I change an entry in the Key Schedule, it seems to ‘break’ the Color Scheme on the Area Plan.

To correct this issue:

  1. Un-apply the View Template (set view to
  2. Open the View Template Properties
  3. Open the Color Scheme dialog for the affected View Template
  4. Set the Schemes to (none), then
  5. Reapply the original Color Scheme by clicking its name.
  6. Press OK a few times

The Color shading for the scheme should now re-appear.

Rendering without Shadows

Luke Johnson

Borissofff strikes again – many of you may already be aware of this, but you can get an interesting exterior rendering effect in Revit if you set the time to somewhere near or during the night, and then adjust the Exposure to a suitably pleasing level.

Translated:
But what if you set in the Preferences of the sun, while at the hour of the night (or so), we obtain precisely the situation where there is no source of direct light, the sky!

If you turn Reneder, we completely black picture!

But! Adjusting the exposure, especially of its magnitude, reducing it to about 3-4 units (you can see the other values), you can get the desired renderer without harsh shadows!
via
Google translate
of
http://borissofff.blogspot.com.au/2012/07/revit_13.html

Modelling Roof Tiles as a Pattern-Based Curtain Panel

Luke Johnson

I love to see Revit tools used in somewhat unintended ways.  In this case, Jay Holland divides an In-Place Mass Face and applies a Pattern Based Roof Tile to the divided surface – cool!

His sample files (click the download link or the little maximize arrow):

Read more at:
BIM Aficionado: Pattern-Based Curtain Panel Roof Tile

Image from BIM Aficionado

Are you sick of annoying BIM software fights?

Luke Johnson

I am.

Ostensibly, they start along the lines of “my firm is implementing new systems, what software should we choose…”  Then, very quickly they become a mud-flinging game of mirrors, misdirected passion and other more general angst (Why does Program X hate me?)  They are littered with sarcasm, attempted yet misunderstood humour, and a few genuine users who take the time to relate their personal experience.

A great example is this ArchiCAD vs Revit discussion.  Please note that it is in the ArchiCAD group (meaning your submissions may be moderated by a pro-ArchiCAD discussion manager).

http://lnkd.in/rVDxpg

Another similar discussion:
http://lnkd.in/VtP6GX

Dividing a Blogger or WordPress feed by Label

Luke Johnson

Blogger:
For example, I wanted a feed for AIA East Bay that only included posts with the label ‘Revit’.  Here is what the split feed looks like:
http://www.aiaeastbay.blogspot.com.au/feeds/posts/default/-/Revit

Easy way to do it:
To convert that search label into a Blogger RSS feed, replace the string /search/label/ with /feeds/posts/default/-/ so the new feed URL for that search label has the following syntax:
via
Offer RSS Feeds for Blogger Search Labels Similar to WordPress Category Feeds

Another example – all of the What Revit Wants posts that include the label ‘pdf’ can be found as a feed at:
https://wrw.is/feeds/posts/default/-/pdf

Also see:
http://support.google.com/blogger/bin/answer.py?hl=en&answer=97933

Create a WordPress feed for a particular label:
It is even easier.  To subscribe to a particular category feed of a WordPress blog, all you have to do is add /feed after the category url (link).

eg. http://cadspeed.wordpress.com/tag/revit/feed/