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Modelling Tutorial : Adding A Roof

Synopsis

This tutorial demonstrates how to model hip and gable roofs in your Ecotect model, using both the parametric roof tool, and by manually editing nodes.

Duration

You will need about 45 minutes to complete this tutorial.

Training and Accreditation

Successfully completing this tutorial fulfills one of the practical skills required for completing Level 2 of the Geometric Modelling training module.

Resources Required

To complete this tutorial, use the model previously created in the Simple House modelling tutorial. Alternatively, download the AddRoof.zip Ecotect file available in the File Attachments section, and use this as the starting point for this tutorial.

Tutorial

Creating A Hip Roof

1. Open your model in Ecotect. Click on the Create Pitched Roof tool, which is located on the left-hand side of the main work area. This will display the Create Parametric Objects dialogue box to the right of the main work area.
Select the Create Pitched Roof tool.
2. Using your mouse, draw a rectangle to define which part of the model you with to create a roof for, as shown in the following image :
Define the area to be roofed.
3. In the Create Parametric Objects dialogue box, enter the following settings, as shown in the next image :
Define the settings for your new roof.
Note that the Length X and Length Y values should already be set - you did this when you drew the defining rectangle in your model in the previous step. Click the Create New Object button to complete the roof.
A completed hip roof.
4. You've just made a hip roof, which should look something like the image above. If it doesn't, Undo the roof and try again. Make sure you have set the Ridge Access to the X-Axis, otherwise you'll end up with a very strange looking roof. Now's a good time to save your work.

Creating A Gable Roof

1. Creating a gable roof is not that different to creating a hip roof. Select the Create pitched roof tool, and draw a defining rectangle for the gable roof as shown in the following image :
Define the dimensions of the new gable roof.
2. In the Create Parametric Objects dialogue box, enter the following settings for the new gable roof. Remember, Length X and Length Y should already be defined from the previous step :
Enter these settings to create a gable roof.
Click Create New Object to complete the gable roof.
A completed gable roof.

Modifying Roofs

Now that you've created standard roofs for your model, let's edit the nodes of the smaller gable roof so that this roof properly adjoins the hip roof.

1. Select the gable roof. Go to the Edit>Ungroup menu item so that you can edit the individual planes that make up the roof.
Ungroup the gable roof.
2. Select the vertical planes of the gable roof closest to the hip roof. You can delete these using the [DEL] key on your keyboard.
Delete the selected planes as shown.
3. Select the ceiling plane of the gable roof, and then double-click on it. This will activate the node editing mode for the selected object, as indicated by the red squares located in each of the corners.
Delete the selected planes as shown.
4. Select the two nodes closest to the hip roof - hold down the [SHIFT] key to select multiple nodes. Use nudge (in this instance, [SHIFT]+[Y]) to bring this edge of the gable roof in line with the front of the hip roof as shown.
Nudge the ceiling nodes into line with the front of the hip roof.
5. Use the same technique to bring the fascia planes into line with ceiling plane.
Nudge the fascias into line with the front of the hip roof.
6. Select the pitched roof plane as shown. Double-click on it to enter node editing mode. Use nudge to align the bottom right node of this plane to the front of the hip roof.
Nudge the bottom right node of into line with the front of the hip roof.
7. Let's now look at the other pitched roof plane. Nudge the bottom left node into the same plane as with the previous step.
Nudge the bottom left node into line with the front of the hip roof.
8. Now select the top left node. Unfortunately, we can't nudge this node into exactly the right position, because the hip of the roof does not correspond with our nudge increment (and it would be hard to set it to match perfectly). For now, let's nudge beyond the hip line as shown.
Nudge the ceiling nodes into line with the front of the hip roof.
9. Instead, we're going to use Ecotect's snaps to find the exact point. We need the Intersection snap to do this - turn it on using the Snap Settings button. Alternatively, you can toggle the Intersection snap on or off by pressing the [I] key on your keyboard.
Turn on the Interestion snap under Snap Settings.
Alternatively, toggle the Intersection snap on/off using 'I' on your keyboard.
10. Back to editing that roof. Select the top left hand node from before. Click once to pick it up, and then move it until the 'I' appears at the intersection point of the hip line. Click again to drop the node into the new location.
Move the node to the intersection point.
The node is now on top of the intersection point.
11. Almost done! Now edit the corresponding node on the other pitched roof plane and move it to the same point.
Edit the node for the other roof plane.
You're obviously getting the hang of this!
12. There's one last thing to do - if you ungroup the main hip roof, note that the roof plane adjacent to the gable roof overlaps behind. This may result in inaccurate calculations when performing building analysis.
To correct this, edit the nodes on this roof plane to remove this overlap. You will need to use the Add node tool to create an additional node to complete the new shape for the roof plane.
The overlapping hip roof may cause inaccurate analysis results.
Edit the roof plane's nodes to remove this overlap.
13. Congratulations! You have now completed a roof for your Ecotect model. To see your model in its full glory, go to the Display menu and select Rough Sketch.
The completed roof displayed as a rough sketch.
ECOTECT Tutorial: Visualisation Settings Panel

MODELLING TUTORIAL : ADDING A ROOF

comment posted by peterm :: 19 March 2008 - 5:40pm

Please sort the images out, they simply don't show except for the last 7, bloody frustrating

Images Fixed

comment posted by andrew :: 23 March 2008 - 9:01pm

Sorry about that, the images are now working. We've dumped poor Sid in it as he hasn't had the required permissions to upload images directly but the attachments system has been a bit flakey.

Still, we seem to have sorted it out now...

Kind regards, Andrew

Missing File

comment posted by BobM :: 25 April 2008 - 12:16pm

Hi

Thanks

Regards

Bob Morgan