The shapes to cut; each gives its own result.
The planes to cut along, each through its frame's origin; what lies on the side a normal points to is in front of that plane.
OptionalkeepWhether to keep what lies behind every plane, such as the inside of a box of six frames, or behind any, cutting away only what lies in front of all.
Shapes, frames and what to keep for
operations.cutByFrames, which cuts each shape with the frames' planes and keeps what lies behind them.