Author: Dann Corbit
Date: 20:40:37 11/01/02
Go up one level in this thread
On November 01, 2002 at 22:23:49, Russell Reagan wrote:
>Maybe someone can give this example in C/C++? The pascal doesn't mean much to
>me.
unsigned int can_attack[6][9];
// 6 by 238 element array
unsigned int attack_dir [6][0x77 + 0x77]; // must use 0x77 as a constant offset
in C++, since we don't have arrays other than zero based unless you make your
own class to handle it and overload []
can Piece on SquareA attack SquareB?
tmp = SquareA - SquareB + 0x77;
probe = tmp >> 5;
bittest = 1 << (probe && 31);
if (can_attack[piece][probe] && bittest) {
//piece can potentially attack SquareB
// if piece is slider then only now you have to probe
// the big table attack_dir and check if there are blocking pieces
}
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