Example 26

This will show you how to make a Control Tower using the Polygon A and B type tools and the Fence. The lengths used here are based on a scale of 1/4 so all measurements are multiplied by 4.

 

This tower has a "star" surface type as shown in the graphic. The base points are in blue and the top point are in red. You'll notice that the top and base don't have the same lengths so you must disable the synchronization option in the polygon dimensions menu.
The top base of the roof is made using the Polygon A type and the base has an octagonal form.
The fence on top is made using the Fence tool. The graphic shows the layout of the fence delimited by the big red points, the smaller yellow points are the vertical posts.
Next comes the base of the top control tower using the Polygon again. Since this tower will have transparent windows I will have to also draw the interior sides of the polygon.
The windows section is another polygon where the top base or roof surface is bigger than the base.

On the first test you can see that the walls of this section are reversed. The interior walls in gray should be the exterior walls and the exterior walls must go to the interior of the tower. This problem is due to the shape of the polygon walls and here you have two choices to fix it -

  1. Select for the external walls the internal textures and viceversa or, much better,
  2. Use the Inverted control box option for each of the sides.
This is the texture panel for the CT windows section.
You can see that all sides will be drawn in inverted mode as shown by all the
I buttons, and that all sides have a transparency of 73% in a green color. LAN means that the windows will be lighted at night.
The small picture shows the correct view of the CT windows once all modifications are done.
Next we make the Control Tower roof using the Polygon. Both sides, internal and external, are drawn.
Finally, using the Fence tool, we can add some vertical posts that will work as antennas on top of the Control Tower.