public static ICollection <Face> OffsetFaceEdgesInward(this Face face, double distance, OffsetCornerType offsetCornerType)
{
if (!(face.Geometry is Plane))
{
throw new ArgumentException("Face must be planar");
}
Plane plane = (Plane)face.Geometry;
ITrimmedCurve[] curves = face.Edges.ToArray();
ITrimmedCurve firstEdge = curves.First();
ITrimmedCurve[] otherEdges = curves.Skip(1).ToArray();
ICollection <ITrimmedCurve> offsetCurves = firstEdge.OffsetChain(plane, distance, otherEdges, offsetCornerType);
if (offsetCurves.Count == 0)
{
return(null);
}
if (face.ContainsPoint(offsetCurves.First().StartPoint) ^ distance > 0)
{
return(DoInWriteBlock <ICollection <Face> >(() => Body.CreatePlanarBody(plane, offsetCurves).SeparatePieces().Select(b => b.Faces.First()).ToList()));
}
offsetCurves = firstEdge.OffsetChain(plane, -distance, otherEdges, offsetCornerType);
if (offsetCurves.Count == 0)
{
return(null);
}
return(Body.CreatePlanarBody(plane, offsetCurves).SeparatePieces().Select(b => b.Faces.First()).ToList());
}
public static ICollection <ITrimmedCurve> OffsetChainInward(this ICollection <ITrimmedCurve> curves, Face face, double distance, OffsetCornerType offsetCornerType)
{
if (!(face.Geometry is Plane))
{
throw new ArgumentException("Face must be planar");
}
Plane plane = (Plane)face.Geometry;
ITrimmedCurve firstEdge = curves.First();
ITrimmedCurve[] otherEdges = curves.Skip(1).ToArray();
ICollection <ITrimmedCurve> offsetCurves = firstEdge.OffsetChain(plane, distance, otherEdges, offsetCornerType);
if (offsetCurves.Count == 0)
{
return(new ITrimmedCurve[0]);
}
if (face.ContainsPoint(offsetCurves.First().StartPoint) ^ distance > 0)
{
return(offsetCurves);
}
offsetCurves = firstEdge.OffsetChain(plane, -distance, otherEdges, offsetCornerType);
if (offsetCurves.Count == 0)
{
return(new ITrimmedCurve[0]);
}
return(offsetCurves);
}
public static ICollection <ITrimmedCurve> OffsetTowards(this ICollection <ITrimmedCurve> curves, Point point, Plane plane, double distance)
{
ITrimmedCurve firstCurve = curves.First();
ITrimmedCurve[] otherCurves = curves.Skip(1).ToArray();
bool isLeft = Vector.Dot(Vector.Cross(firstCurve.Geometry.Evaluate(0).Tangent.UnitVector, point - firstCurve.StartPoint), plane.Frame.DirZ.UnitVector) >= 0;
return(firstCurve.OffsetChain(plane, (isLeft ? -1 : 1) * distance, otherCurves, OffsetCornerType.NaturalExtension));
}
public static ICollection <ITrimmedCurve> OffsetChainInward(this ICollection <ITrimmedCurve> curves, Plane plane, double distance, OffsetCornerType offsetCornerType)
{
ITrimmedCurve firstEdge = curves.First();
ITrimmedCurve[] otherEdges = curves.Skip(1).ToArray();
ICollection <ITrimmedCurve> offsetCurvesA = firstEdge.OffsetChain(plane, distance, otherEdges, offsetCornerType);
ICollection <ITrimmedCurve> offsetCurvesB = firstEdge.OffsetChain(plane, -distance, otherEdges, offsetCornerType);
if (offsetCurvesA.Count == 0 || offsetCurvesB.Count == 0)
{
return(new ITrimmedCurve[0]);
}
if (offsetCurvesA.Select(c => c.Length).Sum() < offsetCurvesB.Select(c => c.Length).Sum())
{
return(offsetCurvesA);
}
else
{
return(offsetCurvesB);
}
}
