// Cycle the current and next piece and check if the board is topped.
void cyclepcs(bool holdset)
{
brd.pc = (holdset ? brd.holdpc : newpc());
brd.holdpc = newpc();
brd.pc.pos.y = pcheight(brd.pc);
brd.pc.pos.x = brd.width/2;
brd.holdpc.pos.y = 0;
brd.holdpc.pos.x = 2;
if (brd.grid) brd.topped = overlap(brd.pc);
}
PushComputation swap_pc(const PushComputation &pc, Transition action) {
PushComputation newpc(pc);
if(action == LA_SWAP) {
newpc.jls = (newpc.jls == -1 ? newpc.z : std::min(newpc.z, newpc.jls));
} else if(action == RA_SWAP) {
newpc.zrs = newpc.j;
}
std::swap(newpc.y, newpc.z);
std::swap(newpc.yls, newpc.zls);
std::swap(newpc.yrs, newpc.zrs);
return newpc;
}