With the information about Picture in our mind, we toss ourselves on our new goal. We want to toss our letter d in the air. By now our method of operation is familiar. Define a tossed box and use it to define our toss function.

Look at the reference box and the tossed box. Whoops, it draws outside of the boundary! Is that even allowed?

Let's try to figure out the vectors for our tossed box. The new a vector is right between the the original b and c vectors. I.e. \(a' = a+\frac{b + c}{2}\).

the new b vector is halve as large as the vector addition of b + c. I.e. \(b' = \frac{b + c}{2}\).

The new c is halve as large as the vector from b that reaches c. I.e. \(c' = \frac{c - b}{2}\).

Having found the relations between the original box defining vectors and the tossed box its defining vector, we can proceed to implement it.

Again in src/canvas/mod.rs you find a default implementation of tossed_box. Adopt it to reflect an actual tossed box.

Then find the toss function in src/picture/mod.rs and use the freshly defined tossed_box function in its body.

Next don't forget to change geometry binary to use the new toss function, execute it and marvel at the tossed letter d in output.svg.