Quick and Dirty Rose Window in SketchUp

[geoff_nunn]

Once you have your basic shapes established, you need to copy the interior arc as a radial array running around the interior of the circle. In these instructions, anything typed in quotes should not include the quotation marks.

First, select the arc. Then change to the 'rotate' tool and click on the center of the circle* to set the pivot point for your rotation.

Once you have the protractor shape over the center of the circle, left-click once to set your pivot point. your cursor should now have a dotted guide line following it around. drag your cursor over to the selected arc (I chose either the midpoint of the arc or one of the endpoints) and left-click again. The arc should now rotate around the center of the circle as you move your mouse.

To start forming the array, hit the [Ctrl] key. This will cause the original arc to remain in place and you will instead be rotating a copy.

To complete the array type "360" and hit [Enter] then type "/24" and hit [Enter] again.
The first part of these commands causes the copy of the arc to rotate 360 degrees around the center of the circle and the second creates 24 copies of the arc evenly spaced along the path of rotation. If your circle settings are set to render as 24-sided polygons, you should have something that looks like the second picture.

*If you centered your original circle on the intersection of the three main SketchUp axes, your cursor should easily re-snap to this point. If the outer circle is not centered on the axes, you may need to run your mouse over the edge of the circle before trying to set your pivot point. If you do this, your cursor should then change color and display the word "center" when you are in the right spot.