r987:a22b3f1bf83e
Fri, 25 Jun 2010 06:00:56
[Not Reviewed]
0 comments (0 inline)
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20
| ... | ... |
@@ -573,18 +573,24 @@ |
| 573 | 573 |
/// minCut() returns a minimum cut. |
| 574 | 574 |
/// \pre One of the \ref init() functions must be called before |
| 575 | 575 |
/// using this function. |
| 576 | 576 |
void startFirstPhase() {
|
| 577 | 577 |
_phase = true; |
| 578 | 578 |
|
| 579 |
Node n = _level->highestActive(); |
|
| 580 |
int level = _level->highestActiveLevel(); |
|
| 581 |
while ( |
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| 579 |
while (true) {
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|
| 582 | 580 |
int num = _node_num; |
| 583 | 581 |
|
| 584 |
|
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Node n = INVALID; |
|
| 583 |
int level = -1; |
|
| 584 |
|
|
| 585 |
while (num > 0) {
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|
| 586 |
n = _level->highestActive(); |
|
| 587 |
if (n == INVALID) goto first_phase_done; |
|
| 588 |
level = _level->highestActiveLevel(); |
|
| 589 |
--num; |
|
| 590 |
|
|
| 585 | 591 |
Value excess = (*_excess)[n]; |
| 586 | 592 |
int new_level = _level->maxLevel(); |
| 587 | 593 |
|
| 588 | 594 |
for (OutArcIt e(_graph, n); e != INVALID; ++e) {
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| 589 | 595 |
Value rem = (*_capacity)[e] - (*_flow)[e]; |
| 590 | 596 |
if (!_tolerance.positive(rem)) continue; |
| ... | ... |
@@ -644,20 +650,28 @@ |
| 644 | 650 |
if (_level->emptyLevel(level)) {
|
| 645 | 651 |
_level->liftToTop(level); |
| 646 | 652 |
} |
| 647 | 653 |
} else {
|
| 648 | 654 |
_level->deactivate(n); |
| 649 | 655 |
} |
| 650 |
|
|
| 651 |
n = _level->highestActive(); |
|
| 652 |
level = _level->highestActiveLevel(); |
|
| 653 |
--num; |
|
| 654 | 656 |
} |
| 655 | 657 |
|
| 656 | 658 |
num = _node_num * 20; |
| 657 |
while (num > 0 |
|
| 659 |
while (num > 0) {
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|
| 660 |
while (level >= 0 && _level->activeFree(level)) {
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--level; |
|
| 662 |
} |
|
| 663 |
if (level == -1) {
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|
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n = _level->highestActive(); |
|
| 665 |
level = _level->highestActiveLevel(); |
|
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if (n == INVALID) goto first_phase_done; |
|
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} else {
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|
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n = _level->activeOn(level); |
|
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} |
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--num; |
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|
|
| 658 | 672 |
Value excess = (*_excess)[n]; |
| 659 | 673 |
int new_level = _level->maxLevel(); |
| 660 | 674 |
|
| 661 | 675 |
for (OutArcIt e(_graph, n); e != INVALID; ++e) {
|
| 662 | 676 |
Value rem = (*_capacity)[e] - (*_flow)[e]; |
| 663 | 677 |
if (!_tolerance.positive(rem)) continue; |
| ... | ... |
@@ -717,25 +731,15 @@ |
| 717 | 731 |
if (_level->emptyLevel(level)) {
|
| 718 | 732 |
_level->liftToTop(level); |
| 719 | 733 |
} |
| 720 | 734 |
} else {
|
| 721 | 735 |
_level->deactivate(n); |
| 722 | 736 |
} |
| 723 |
|
|
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while (level >= 0 && _level->activeFree(level)) {
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| 725 |
--level; |
|
| 726 |
} |
|
| 727 |
if (level == -1) {
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|
| 728 |
n = _level->highestActive(); |
|
| 729 |
level = _level->highestActiveLevel(); |
|
| 730 |
} else {
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|
| 731 |
n = _level->activeOn(level); |
|
| 732 |
} |
|
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--num; |
|
| 734 | 737 |
} |
| 735 | 738 |
} |
| 739 |
first_phase_done:; |
|
| 736 | 740 |
} |
| 737 | 741 |
|
| 738 | 742 |
/// \brief Starts the second phase of the preflow algorithm. |
| 739 | 743 |
/// |
| 740 | 744 |
/// The preflow algorithm consists of two phases, this method runs |
| 741 | 745 |
/// the second phase. After calling one of the \ref init() functions |
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