Tuesday, 15 April 2014

Navisworks and Recap

Navisworks 2015 now supports rcs and rcp files as you can read in the help file from Autodesk.

This means no nwc files will be created from these files.

ReCap Enhancements

ReCap file formats RCS and RCP are now supported. This file reader differs from other file readers supplied with Autodesk Navisworks. Instead of converting the contents of the ReCap file and including it in the model, the file reader makes a link to the RCS/RCP file and adds this information to the model. You can also open a published NWD file with previously embedded RCS/RCP files.

The ReCap point cloud engine now has improved reality capture. Enhancements include the ability to select and clash subsets of a scan in point cloud datasets, rather than an entire scan dataset.

ADSK helpfile

Looking at an rcs file in Navisworks you will see that rcs files are divided up in voxels.

A voxel represents a value on a regular grid in three-dimensional space. Voxel is a combination of "volume" and "pixel" where pixel is a combination of "picture" and "element".

In the following image there is a part of a building. I took a couple of pictures and had these pictures converted to points with recap360.
Looking at all these voxels I was a bit wondering how this was going to be usefull. In the help file I read that these should help you with clashdetection because you don't need to clash against the entire set. Sounds nice but how is that going to works?
After a little bit of pondering I came to the following solution.
first change the pick radius of your selection tool. Standard it has been set to one pixel but in my experience you tend to miss pick a lot of these voxels

Three pixels works for me. Also you can use the not documented feature of making a cross selection by pressing the shift and the space bar and dragging an right to left selection rectangle. (see this post navisworks-selections-methodes)
Once you have your selection you can of course save that selection and use it in a clash detection. Personally I am much more interested in creating searchsets. But looking at the properties of one voxel and comparing it to another voxel tells you that there is nothing that distinguishes them from each other. But you can add a new user data tab and add your own properties.

So I now have a voxel with a new user data tab that I decided to call Daniel with a property named Clashdetection and a value called masonry.

Now I should be able to create a searchset that can find this voxel. The moment you add properties to an element in Navisworks it will generate a simple searchset for you. Go to the selection tree and change it from standard to properties.

One big disadvantage of adding a user ata tab to a voxel is that you can only do one voxel at the time. This means that at the moment you are probably faster with using selectionsets. Just remember that those are not dynamic.
The voxel must have some properties like an id that are not exposed to the user.. Because when you save the project and you reopen the file the searchset still works. The appended rcs file has not been changed so the information of the user data tab we have added must be stored in the nwf file. But how doest it know to which voxel I have added the information if there are no (visible) properties that distinguish one voxel from another?
Looking at the selection tools it would be nice if you could select like you can in Recap or that saved scan regions and viewstates come throught to Navisworks.
These new functionalities for pointcloud are a good first step but definitely need some more work.

Monday, 7 April 2014

Revit 2015 Wall schedule

In revit 2015 you will be able to schedule more wall parameters but be aware that the unconnected height might not always be what you want it to be.

Notice the four walls they are all clearly all a different height.

Take a look at the schedule and you will see that 3 of these walls have the same unconnected height.

  • The yellow wall is attached to the floor above
  • The green one has it's profile edited
  • The blue one is a regular wall between to levels
  • The red one is like the blue wall but has a negative base offset and a positive top offset
Unconnected height is: 

distance between (Bottom Constraint + Bottom Offset) + 
(Top Constraint + Top Level)

This means that the unconnected height does not have to be the same as the physical height. 

Thursday, 3 April 2014

Revit and google translate

For Dutch readers only this time :)

Regelmatig wordt er gevraagd of er ook een Nederlandse versie is van Revit. Gek genoeg is die er niet terwijl je zou denken dat een database gestuurd programma op een zeer eenvoudige manier andere talen zou moeten kunnen ondersteunen.

Dit blog wordt voor de verandering weinig informatief. Ik vind de foutmelding van Revit soms redelijk cryptisch (terwijl ik goed Engels spreek en veel ervaring met Revit heb) Laten we de revit warnings eens door google translate halen:

De aardigste heb ik hieronder eens gekopieerd:

Highlighted walls are attached to, but miss, the highlighted targets.
Gemarkeerd muren zijn gevoegd, maar missen, het gemarkeerde doelen.

Highlighted elements are joined but do not intersect.
Gemarkeerde elementen worden samengevoegd, maar niet snijden.

The highlighted column can't maintain attachment to the target. It will be treated as unattached until it can intersect.
De gemarkeerde kolom kan niet gehechtheid aan de streefwaarde te houden. Het zal worden behandeld als losse totdat het kan snijden.

Analytical Model for Structural Element has reset to its default location.
Analytisch model voor structuurbeleid Element heeft teruggezet op de standaard locatie.

Element will be detached from its associated plane
wordt: (absoluut mijn favoriet!!!)
Element zal worden losgemaakt van de bijbehorende vliegtuig

There are identical instances in the same place. This will result in double counting in schedules.
Er zijn identiek gevallen dezelfde plaats. Dit zal resulteren in dubbeltelling in de dienstregelingen.

Multiple Rooms are in the same enclosed region. The correct area and perimeter will be assigned to one Room and the others will display "Redundant Room." You should separate the regions, delete the extra Rooms, or move them into different regions.
Wordt: (behoorlijk netjes vertaald)
Meerdere kamers zijn in dezelfde ingesloten regio. De juiste oppervlakte en omtrek zal worden toegewezen aan een kamer en de anderen zal "Redundant Kamer." U moet de regio's te scheiden, verwijdert u de extra kamers, of zet ze in verschillende regio's.

Als je zelf nog Revit foutmeldingen hebt gooi ze ook eens door google translate en zet ze in de comments.

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