public static ITensorField DecayDistanceFromPoint(this ITensorField field, Vector2 center, float decay)
{
Contract.Requires(field != null);
Contract.Ensures(Contract.Result <ITensorField>() != null);
return(new PointDistanceDecayField(field, center, decay));
}
public static IEigenField Presample(this ITensorField field, Vector2 min, Vector2 max, uint resolution)
{
Contract.Requires(field != null);
Contract.Ensures(Contract.Result <IEigenField>() != null);
return(ResampleAndRescale.Create(field, min, max, resolution));
}
public PointDistanceDecayField(ITensorField field, Vector2 center, float decay)
{
Contract.Requires(field != null);
_field = field;
_center = center;
_decay = decay;
}
public static Tensor Sample(this ITensorField field, Vector2 position)
{
Contract.Requires(field != null);
Tensor result;
field.Sample(ref position, out result);
return(result);
}
public TracingConfiguration(BaseScalarField priorityField, BaseScalarField separationField, ITensorField tensorField, IValueGenerator roadWidth,
float searchAngle = 0.3926991f, //22.5 degrees in radians
float segmentLength = 10,
float mergeDistance = 25
)
{
Contract.Requires(priorityField != null);
Contract.Requires(separationField != null);
Contract.Requires(tensorField != null);
Contract.Requires(roadWidth != null);
_priorityField = priorityField;
_separationField = separationField;
_tensorField = tensorField;
_roadWidth = roadWidth;
_consineSearchConeAngle = (float)Math.Cos(searchAngle);
_segmentLength = segmentLength;
_mergeDistance = mergeDistance;
}
public static IEigenField Create(ITensorField baseField, Vector2 min, Vector2 max, uint resolution)
{
var major = new Vector2[resolution + 1, resolution + 1];
Parallel.For(0, resolution + 1, i =>
Parallel.For(0, resolution + 1, j => {
var p = new Vector2(i / (float)resolution, j / (float)resolution) + (min / new Vector2(resolution, resolution));
Tensor t;
baseField.Sample(ref p, out t);
Vector2 majEigen, minEigen;
t.EigenVectors(out majEigen, out minEigen);
major[i, j] = majEigen;
})
);
return(new ResampleAndRescale(major, min, max));
}
public void Add(ITensorField field)
{
Contract.Requires(field != null);
_fields.Add(field);
}
public void Blend(ITensorField field, float weight = 1)
{
_blends.Add(new KeyValuePair <ITensorField, float>(field, weight));
_totalWeight += weight;
}
