//
// Perform subtraction with a synthesized problem.
//
private static List<FigSynthProblem> Subtract(FigSynthProblem synth, ShapeType shapeType)
{
List<AtomicRegion> openAtoms = synth.GetOpenRegions();
//
// Perform subtraction with all open regions with the new shape.
//
List<FigSynthProblem> newSubs = new List<FigSynthProblem>();
foreach (AtomicRegion atom in openAtoms)
{
ShapeAtomicRegion shapeAtom = atom as ShapeAtomicRegion;
if (shapeAtom != null)
{
newSubs.AddRange(SubtractShape(shapeAtom.shape, shapeType));
}
}
//
// Combine the existent problem with the newly subtracted region.
//
List<FigSynthProblem> newSynths = new List<FigSynthProblem>();
foreach (FigSynthProblem newSub in newSubs)
{
// Makes a copy out of the outer problem and appends the subtraction operation.
newSynths.Add(FigSynthProblem.AppendAtomicSubtraction(synth, newSub));
}
//
// Eliminate symmetric problems.
//
return FigSynthProblem.RemoveSymmetric(newSynths);
}
