Revit 2020.2 Coordinate Systems

Happy 2020 to everyone. You may notice that I have created a new look and feel for the site, the original site going back to April 2009! Hope you like the new logo and appearance?

Anyone who authors Revit models or works with 3rd party consultants that use Revit has surely experienced poorly coordinated models and struggled to understand why models do not federate and overlay as expected.

Many of these issues are simply down to a lack of understanding of the Revit coordinate system or properly communicated BEP’s, but these are fundamental to the correct setting out and coordination of projects. Revit 2020.2 offers some help by being able to visualise the Project base Point, Survey Point and the Internal Point within linked models. Also, you can no longer unclip the Project Base Point, meaning that the Internal and Project Base Point are normally consistent, however, see the note at the end of the post!

The image below is displaying the two Project Base Points, the blue being from the active project and the grey being from the linked model

Revit 2020.2 - Coordinate Systems

Revit 2020.2 Linked Project Base Point

Here you can also see that the Internal Origin point is also displayed in grey on a linked project. This is useful when checking that the Project Base Point and Internal Origin are overlayed.

Revit 2020.2 Internal Origin Point

When a linked model is selected the Project Base Point shows the linked model icon and the relevant properties such as the North/South, East/West, Elevation as well as the angle to true north. Very useful when trying to understand why Revit models will not federate and overlay correctly.

Revit 2020.2 - Linked Project Base Point

As many of you will already know, Revit has an internal origin which can be different from the Project Base Point. The Internal Origin point can now be displayed with a new sub category within the Site category.

Revit - Internal Origin Point

When setting the Project Base Point you should now use Specify Coordinates at Point or acquire coordinates rather than directly selecting the Project Base Point and moving.  You will notice that selecting the PBP and using the Properties Palette or directly typing the coordinates will move the PBP independently of the internal origin.

Specify Coordinates at Point

LawrenceH

Revit Tip – Back to basics, changing the sketch colour

Sometimes it’s a good thing to rewind back to basics and look at some of the things that really matter when using Revit on a day to day basis. Obviously, the interface and colours that are used and presented can make a huge difference. Below you can see the Revit 2020 Options dialog. Here you will probably notice the recent additions of ‘calculating’ and ‘Rebar Editing’.

Revit 2020 Options Dialog

The ‘calculating’ colour is used when working with structural connections, especially when propagate connection is used. Revit will background process the connections and display the elements with, by default, Cyan.

The Rebar Editing colour is used when editing rebar constraints, see my previous post for details on this new feature!

Anyway, back to the basics. When sketching elements such as floors or perhaps editing wall profiles we are used to seeing magenta lines as shown in the image below.

Revit Floor Sketch

You can change this default by editing the line styles. To do this select the Manage ribbon, click Additional Settings and then Line Styles as shown in the image below.

Revit Line Styles

You are then presented with the Line Styles dialog. Here you can change the Sketch colour to anything you like.

Edit Line Styles - Revit

In the example below I have changed the Sketch line style to green.

Revit Floor Sketch - Green

This can obviously be quite useful if you have colour blindness with certain colours or are working with different background colours.

Hope this helps,

Lawrence

Revit – Orient to View Problem in Large Projects

A very quick tip and trick when you need to create a 3D view that is oriented to another 2D view. In large projects you are presented with a list which does not come with a scroll bar or search tool. This means that you can spend a considerable amount of time clicking around to get your required view.

Revit - Orient to View in Large Projects Tip and Trick

Simply create a new keyboard shortcut for the Orient to view command, take a look at the video for a quick and easy solution.

Hope this is useful

Revit 2019 – Slow performance when selecting the File Tab

A very quick tip for a very annoying issue. Sometimes, when you delete or move Revit models the recent files list still looks for these missing references. This has an impact when you click the File Tab (can take minutes!) to open.

A quick fix is to delete these file paths from the Revit.ini file. The Revit ini file can be found the following folder (replace your user name shown in red):

C:\Users\YourUserName\AppData\Roaming\Autodesk\Revit\Autodesk Revit 2019

Open the Revit.ini file in notepad and remove the recent files (shown with the Red box). Click the Save command and the Revit.ini file will be updated.

Revit 2019 ini file

Restart Revit and the slow File Tab should be much quicker!

LawrenceH

Dynamo – Geometry Working Range

A recent small change in Dynamo was an error when geometry exceeds a certain size. The default working range is small (when working in millimetres) and will often produce an error with most Revit models.

Dynamo is unitless and when working in feet and inches the default setting would allow the user to model something up to 10,000 inches (254 meters)! However, in millimetres this is only 10 meters which can very easily be exceeded. In the image below, you can see the error.

Error with Dynamo Point

The answer is to set the Geometry Working Range from the settings menu in Dynamo.

Dynamo - Geometry Working Range

The working ranges are as follows:

Dynamo Working Range

Dynamo does have some useful visualisation tools for Work Planes and Coordinate Systems but these cannot currently be scaled and, as such, only show with small geometry.

Dynamo Work Plane and Coordinate System

Hope this helps,

lawrneceH

Revit and Dynamo – Finding the Centroid (CoG) of Revit elements

I was recently asked by a contractor if Revit could report on the centroid of selected objects to facilitate crane lifts. For those of you that know Revit well the answer if normally no. However, Dynamo is really useful for this sort of task. I have created a simple family to represent the Centroid and added three shared parameters to report on the X,Y and Z coordinates.

Centroid

As you can see from the above Dynamo graph the method is fairly simple and can be really useful for a number of scenarios in construction planning.

Here is a quick video showing the use of the Dynamo Graph.

Centroid

Autodesk Revit to Autodesk Robot Structural Analysis – Send Options

Happy New Year and look forward to all the good things planned for 2017! A few Autodesk Revit Releases back (Revit Structure 2015), Autodesk made a change to the integration with Autodesk Robot Structural Analysis to allow the transfer of data via an Intermediate .smxx file (Structural Binary file for transfer). Whilst this new format offers some benefits, the older method did have a few additional features that have not been incorporated within the .smxx export.revit-to-robot

The most useful of these were around offsetting structural members and the use of System panels and mullions.

Here is the process of transferring offsets in Revit to offsets in Autodesk Robot Structural Analysis. The beams have a z Offset Value of -50 set in the Properties Palette.

structural-framing-offset

When the model is ready to be transferred to Robot Structural Analysis, hold down the Ctrl Key whilst clicking the Robot Structural Analysis Link command. You can then click the Send Options and select the ‘Use drawing model offsets as analytical’ check box.

revit-to-robot-options

Here is the result in Robot Structural Analysis.

robot-structural-analysis-offsets

Some of these legacy features can be useful so the Ctrl Key can revert back to the legacy method. Please be aware that results cannot be transferred to Revit using the ‘old’ method.

Hope this helps,

LawrenceH