>> thalamic’s description (with edit)

Permutation: The act of changing the arrangement of a given number of elements.

One font, two different brick combinations.

Picking any two bricks from the 169 available gives a total possible combinations of 14196 (169C2) different fonts. Counting a certain kinds of bricks as one--all four 45degree, for instance--gives 36 unique bricks, resulting in 630 (36C2) unique combinations or fonts.

In this font, if the bricks are swapped with each other, the result will be a different font. Hence order of the bricks matter. In which case, nCr (combinations) is not the right choice. What's needed is nPr (permutations). 169P2 gives 28392 permutations and a 36P2 gives 1260 permutations.

So, at a minimum, 1260 fonts are possible with the current implementation of FontStruct, with just this particular layout of bricks. This whole permuatation thing is so fun and easy to play around with. The original fs Permutation series worked with just the bricks that were available by default. Since then, the FontStructor has evolved, allowing for, in part, custom bricks. This new permutation was not possible before. This one is created just to show that custom bricks can be dragged and dropped on top of the existing ones replacing the standard bricks. The bricks used here are [edit:1/4 brick staggered identical custom composites] .

Clone it and play around.

Instructions
1. Select a brick from the standard bricks or create your own custom brick.

2. Click and drag it to the brick in the first position in My Bricks until that brick turns gray.

3. Release.

4. Repeat steps 1-3 for the brick in the second position in My Bricks.

Learn. Enjoy. Share your permutation.