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gothic-window-2-thumb

In our previous tutorial, we created our first Gothic Window - however it was just the opening and a basic frame. Now, in this tutorial, we are going to add a simple tracery - practically a sort of mullion division in "Perpendicular Style" where only the top part of the tracery will be a little bit more complex.

In this SketchUp tutorial, we are going to use Solid tools (or Intersection for Free users) and some linear arrays to evenly distribute the mullions. Very precise moving and alignment is the key of this part.

Copying the Window frame

Firs, draw the connecting edges for the endpoints to separate the face of one of the sides of the frame. Below I am using the Knife tool of Artisan (this tool is also freely available as "Zorro" in the Plugin store). You could also use TIG's Split Tools (Split Donut). If manually splitting, make sure to draw the edges on the other side, too.

How to model a Gothic tracery in SketchUp

When done, with a careful right-to-left selection box, select one side. Copy it (we'll paste in place later) and make a group of your selection.

How to model a Gothic tracery in SketchUp

Edit the group and close the ends of the tube (so that it's a solid).

How to model a Gothic tracery in SketchUp

Make a copy of it using the Move tool and snapping to the other side of the frame.

How to model a Gothic tracery in SketchUp

Type /3 and press Enter (you can use other number of copies, too). Now we have a nicely and evenly distributed array of these copies.

How to model a Gothic tracery in SketchUp

Since we do not need the very last copy, we can use it to do the same array of copies in the other direction. Right click and "Flip along... (in my case) Groups Red (axis)".

How to model a Gothic tracery in SketchUp

You will need to move it back to our initial position (again, be very precise when selecting endpoints to grab the group and when selecting endpoints to snap it to).

How to model a Gothic tracery in SketchUp

Do the array in the opposite direction, too.

How to model a Gothic tracery in SketchUp

Now you can delete the very last copy - here I am also deleting the very first one - then do not forget to enter the original frame group and Paste the left side of the frame back - you can even delete the dividing edges we made in the very first step above.

This step is needed to get our original frame group back into its solid state.

How to model a Gothic tracery in SketchUp

Using the solid tools

Free users may skip this part and jump immediately here (or use some other boolean plugins - note that AFAIK Whaat's Bool Tools work the other way round and you need to change the order of clicking - experiment...)

Pro users: select the frame first while the Trim tool is active...

How to model a Gothic tracery in SketchUp

Then start clicking on each of the four, additional groups (my screenshot below is at group #2 from the right - you can see the intersection edges already created).

How to model a Gothic tracery in SketchUp

When done, edit the groups, triple click on the separated piece to select all its geometry and delete.

How to model a Gothic tracery in SketchUp

Another one "in action". Tip: if you simply triple click on the group (at where you also want to select the geometry), you need not double click first to open the group and then triple click on the geometry but SU will automatically select all that is connected.

How to model a Gothic tracery in SketchUp

This is what we get so far. Now we'll use the Union tool - and now the order of clicking is indifferent. 

How to model a Gothic tracery in SketchUp

Select one of the groups and keep clicking on the other others until you are done.

How to model a Gothic tracery in SketchUp

Still a bit of clicking...

How to model a Gothic tracery in SketchUp

The last click

How to model a Gothic tracery in SketchUp

And voilà...

How to model a Gothic tracery in SketchUp

Using the Intersect tool

In this case, first we need to move the raw geometry into the same editing context. Select a group of the four, new groups, cut it (Ctrl+X), edit the window frame group and Paste in place. Explode the pasted group, select all, right click and "Intersect with... Context" (in order to avoid other, outside geometry to interfere and create intersection edges here).

How to model a Gothic tracery in SketchUp

With a right-to-left selection box, select the faces that "stick out" of the inserted group from the frame, delete them and start cleaning up your model. Unfortunately, some inner faces have also been created so cleanup plugins, though can help with most of the stray geometry, will not be enough.

How to model a Gothic tracery in SketchUp

Add the groups in a similar fashion one by one and intersect > clean-up... Here it is with already two groups cleaned up. You can add more at a time, too, but you may risk a lot of geometry to be created unnecessarily thus making you a double job during the clean-up process.

How to model a Gothic tracery in SketchUp

Registered members are welcome to discuss the tutorial on the forums. The model is accessible for download in the 3D Warehouse.