if (RIGHTOF_DOT(state, x, y) == LINE_YES)
draw_rect(dr, BORDER + x * TILE_SIZE,
BORDER + y * TILE_SIZE - LINEWIDTH/2,
TILE_SIZE, (LINEWIDTH/2) * 2 + 1, ink);
}
if (RIGHTOF_DOT(state, x, y) == LINE_YES)
draw_rect(dr, BORDER + x * TILE_SIZE,
BORDER + y * TILE_SIZE - LINEWIDTH/2,
TILE_SIZE, (LINEWIDTH/2) * 2 + 1, ink);
}