Function LoopCrosser.cellCrossesCell
Given two index cells, return true if there are any edge crossings or wedge crossings within those cells.
bool cellCrossesCell
(
in const(s2 .s2shape_index .S2ClippedShape) a_clipped,
in const(s2 .s2shape_index .S2ClippedShape) b_clipped
);