The Assignment: For this assignment, we will be doing something a little fun for a change. We will be creating a couple of "impossible figures" using the ISOMETRIC grid in AutoCAD.

STARTING PRACTICE: The other day, we drew a PENROSE TRIANGLE as part of the BELLRINGER regarding OPTICAL ILLUSTIONS. Today, we draw one using 3D cubes. START WITH the figure of cubes to the right. Using the ISOMETRIC GRID and any other AutoCAD techniques that you wish, recreate the figure. Make sure that the cubes are EXACT and the distance between each cube is the same. (You do not need to worry about shading...) You will need to do some TRIMMING to make this figure work perfectly. Save this to your AutoCAD 13 folder and call it CUBES.

SELECTING YOUR OWN FIGURE: Once you have finished the figure above, follow this link to a webpage of optical illusions, all drawn using only simple lines. Click on the "Wireframe" links and pick one that you would like to try to recreate. If AutoCAD drives you nuts, pick an easier one, if you are really good at AutoCAD, pick a harder one! If you wish, I have a number of pre-printed illusions that you can pick from to work on, some easier and some harder, come see me if you want help!

Try to pick a figure that has lines primarily on the ISOMETRIC grid and you should be fine. Your figure will not necessarily be easy to recreate in AutoCAD, but you have the skills! DO YOUR BEST to recreate them, using any AutoCAD tools you wish, such as grid, offset, etc. Most of these figures involve TRIMMING lines in ways that figures could not actually be cut in real life...

SIGNING YOUR WORK AND SAVING: When you are done with your figures, use the AutoCAD TEXT Tool to put your name and the year on your drawing. From AutoCAD, SAVE your file to your AUTOCAD 10 folder as:

lastname_impossible_cubes.dwg

and

lastname_impossible_figure.dwg

These may be posted on the class website and possibly in the hallway as well, so give me good stuff!