|
|
|
@ -139,15 +139,22 @@ TileIterator &DiagonalTileIterator::operator++()
|
|
|
|
|
{
|
|
|
|
|
assert(this->tile != INVALID_TILE);
|
|
|
|
|
|
|
|
|
|
bool new_line = false;
|
|
|
|
|
do {
|
|
|
|
|
/* Iterate using the rotated coordinates. */
|
|
|
|
|
if (this->a_max > 0) {
|
|
|
|
|
++this->a_cur;
|
|
|
|
|
this->a_cur += 2;
|
|
|
|
|
new_line = this->a_cur >= this->a_max;
|
|
|
|
|
} else {
|
|
|
|
|
--this->a_cur;
|
|
|
|
|
this->a_cur -= 2;
|
|
|
|
|
new_line = this->a_cur <= this->a_max;
|
|
|
|
|
}
|
|
|
|
|
if (this->a_cur == this->a_max) {
|
|
|
|
|
this->a_cur = 0;
|
|
|
|
|
if (new_line) {
|
|
|
|
|
/* offset of initial a_cur: one tile in the same direction as a_max
|
|
|
|
|
* every second line.
|
|
|
|
|
*/
|
|
|
|
|
this->a_cur = abs(this->a_cur) % 2 ? 0 : (this->a_max > 0 ? 1 : -1);
|
|
|
|
|
|
|
|
|
|
if (this->b_max > 0) {
|
|
|
|
|
++this->b_cur;
|
|
|
|
|
} else {
|
|
|
|
|