/**
* Make some progress in the WaveFunctionCollapseAlgorithm
*/
public Resolution Step()
{
// This will be true if the user has called Ban, etc, since the last step.
if (deferredConstraintsStep)
{
StepConstraints();
}
// If we're already in a final state. skip making an observiation.
if (status == Resolution.Undecided)
{
// Pick a index to use
var index = indexPicker.GetRandomIndex(randomDouble);
if (index != -1)
{
// Pick a tile to select at that index
var pattern = patternPicker.GetRandomPossiblePatternAt(index, randomDouble);
RecordBacktrack(index, pattern);
// Use the pick
if (InternalSelect(index, pattern))
{
status = Resolution.Contradiction;
}
}
// Re-evaluate status
if (status == Resolution.Undecided)
{
patternModelConstraint.Propagate();
}
if (status == Resolution.Undecided)
{
StepConstraints();
}
// If we've made all possible choices, and found no contradictions,
// then we've succeeded.
if (index == -1 && status == Resolution.Undecided)
{
status = Resolution.Decided;
return(status);
}
}
TryBacktrackUntilNoContradiction();
return(status);
}
