Hello, xcrypt!

I hope I understand the problem.

Code:| * - - - - - + - - - - - * | * | * | | * | * | | * [2] * | r | * | * | | * | * | - - + - - [3] - * - [1] - - + - - | * | * | | * | * | | * [4] * | r | * | * | | * | * | * - - - - - + - - - - - * r | r

We divide the coordinate plane into fourobliquequadrants.

Each quadrant has its set of parametric equations.

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