/**
* Decides if this constraint can be satisfied and which way it
* should flow based on the relative strength of the variables related,
* and record that decision.
*/
function chooseMethod($mark)
{
if ($this->v1->mark == $mark) {
$this->direction = $this->v2->mark != $mark && Strength::stronger($this->strength, $this->v2->walkStrength) ? Direction::FORWARD : Direction::NONE;
}
if ($this->v2->mark == $mark) {
$this->direction = $this->v1->mark != $mark && Strength::stronger($this->strength, $this->v1->walkStrength) ? Direction::BACKWARD : Direction::NONE;
}
if (Strength::weaker($this->v1->walkStrength, $this->v2->walkStrength)) {
$this->direction = Strength::stronger($this->strength, $this->v1->walkStrength) ? Direction::BACKWARD : Direction::NONE;
} else {
$this->direction = Strength::stronger($this->strength, $this->v2->walkStrength) ? Direction::FORWARD : Direction::BACKWARD;
}
}
function chooseMethod($mark)
{
if ($this->v1->mark == $mark) {
$this->direction = $this->v2->mark != $mark && Strength::stronger($this->strength, $this->v2->walkStrength) ? $this->forward : $this->nodirection;
}
if ($this->v2->mark == $mark) {
$this->direction = $this->v1->mark != $mark && Strength::stronger($this->strength, $this->v1->walkStrength) ? $this->backward : $this->nodirection;
}
// If we get here, neither variable is marked, so we have a choice.
if (Strength::weaker($this->v1->walkStrength, $this->v2->walkStrength)) {
$this->direction = Strength::stronger($this->strength, $this->v1->walkStrength) ? $this->backward : $this->nodirection;
} else {
$this->direction = Strength::stronger($this->strength, $this->v2->walkStrength) ? $this->forward : $this->nodirection;
}
}
