Stacker

Overview

The Stacker stacks the shapes it receives in the top input on top of the shapes in the bottom input and outputs the result.

Stacking process summary

The top shape will fall as far down as possible, this means that two full shapes will end up on each other ( + = ) but two opposite halves will combine into a single full layer ( + = ).

Additionally, any Crystal that falls will shatter.

Specifics

Firstly, the top shape is put above the bottom shape with one empty layer in between them.

Then, the Shape Gravity Rules are applied to the resulting shape.

Spoiler warning : the next step is a solution for how to get pins without anything on top of them in a shape, you might prefer figuring out the solution by yourself first.

Finally, any layers above the limit (5 if insane scenario, 4 otherwise) get discarded.