grid. I'm really starting to get annoyed by the default round-
towards-zero behaviour of C integer division.
[originally from svn r5681]
int tx, ty;
game_state *ret;
- tx = (x - BORDER) / TILE_SIZE;
- ty = (y - BORDER) / TILE_SIZE;
+ tx = (x + TILE_SIZE - BORDER) / TILE_SIZE - 1;
+ ty = (y + TILE_SIZE - BORDER) / TILE_SIZE - 1;
if (tx >= 0 && tx < cr && ty >= 0 && ty < cr && button == LEFT_BUTTON) {
if (tx == ui->hx && ty == ui->hy) {