public OptimizationProblem CreateProblem()
{
// create an empty mapping of curves to annotations, as we have no annotations
var curvesToAnnotations = new Dictionary <FeatureCurve, ISet <Annotation> >();
foreach (var fc in sessionData.FeatureCurves)
{
curvesToAnnotations[fc] = new HashSet <Annotation>();
}
// now we are going to transform the objective and the constraints
var primitiveWriter = primitivesReaderWriterFactory.CreateWriter();
primitiveWriter.Write(snappedPrimitive);
// now we construct all we need for the optimization problem
var variables = primitiveWriter.GetVariables();
var initialValues = primitiveWriter.GetValues();
var objectiveWithConstraints = primitiveReconstructor.Reconstruct(snappedPrimitive, curvesToAnnotations);
return(new OptimizationProblem
{
Objective = objectiveWithConstraints.Item1,
Constraints = objectiveWithConstraints.Item2,
Variables = variables,
InitialValue = initialValues,
});
}
private void DoUpdate()
{
if (optimizationTask != null)
{
shouldOptimizeAgain = true;
return;
}
oldSnappedPrimitive = snappedPrimitive;
snappedPrimitive = snappersManager.Create(newPrimitive);
snappedPrimitive.UpdateFeatureCurves();
var emptyCurvesToAnnotations = new Dictionary <FeatureCurve, ISet <Annotation> >();
var objectivesAndConstraints = snappersManager.Reconstruct(snappedPrimitive, emptyCurvesToAnnotations);
var objective = objectivesAndConstraints.Item1;
var constraints = objectivesAndConstraints.Item2;
var primitivesWriter = primitivesReaderWriterFactory.CreateWriter();
primitivesWriter.Write(snappedPrimitive);
var vars = primitivesWriter.GetVariables();
var vals = primitivesWriter.GetValues();
optimizationTask = Task.Factory.StartNew <double[]>(
_ => optimizer.Minimize(objective, constraints, vars, vals).Last(), TaskScheduler.Default)
.ContinueWith(task =>
{
if (disposed)
{
return;
}
var optimum = task.Result;
// update primitives from the optimal values
primitivesReaderWriterFactory.CreateReader().Read(optimum, snappedPrimitive);
snappedPrimitive.UpdateFeatureCurves();
// update the task managment fields.
sessionData.SnappedPrimitives.Remove(oldSnappedPrimitive);
optimizationTask = null;
if (shouldOptimizeAgain)
{
shouldOptimizeAgain = false;
DoUpdate();
}
else
{
sessionData.SnappedPrimitives.Add(snappedPrimitive);
eventAggregator.GetEvent <SnapCompleteEvent>().Publish(null);
}
}, TaskScheduler.FromCurrentSynchronizationContext());
}
public OptimizationProblem CreateProblem()
{
var curvesToAnnotations = GetCurvesToAnnotationsMapping();
// get objectives and constraints for primitives
var constraints = new List <Term>();
var objectives = new List <Term>();
foreach (var snappedPrimitive in sessionData.SnappedPrimitives)
{
var objectiveAndConstraints = snappersManager.Reconstruct(snappedPrimitive, curvesToAnnotations);
objectives.Add(objectiveAndConstraints.Item1);
constraints.AddRange(objectiveAndConstraints.Item2);
}
// add constraints extracted from the annotations
var annotationConstraints = from annotation in sessionData.Annotations
from constraint in annotationConstraintsExtractor.GetConstraints(annotation)
select constraint;
constraints.AddRange(annotationConstraints);
// perform the optimization.
var primitivesWriter = primitivesReaderWriterFactory.CreateWriter();
primitivesWriter.Write(sessionData.SnappedPrimitives);
var variables = primitivesWriter.GetVariables();
var values = primitivesWriter.GetValues();
var finalObjective = TermUtils.SafeSum(objectives);
return(new OptimizationProblem
{
Objective = finalObjective,
Constraints = constraints.ToArray(),
Variables = variables,
InitialValue = values,
});
}
