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> 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);
}
}
private static ICollection <ITrimmedCurve> OffsetChainInwardWithInnerLoops(Face face, double distance, OffsetCornerType offsetCornerType, ITrimmedCurve[] outerLoop, List <ITrimmedCurve[]> innerLoops)
{
if (!(face.Geometry is Plane))
{
throw new ArgumentException("Face must be planar");
}
Plane plane = (Plane)face.Geometry;
Body outerBody = null;
try {
outerBody = Body.CreatePlanarBody(plane, outerLoop.OffsetChainInward(plane, distance, offsetCornerType));
}
catch {
return(null);
}
Body[] innerBodies = innerLoops.Select(l => Body.CreatePlanarBody(plane, outerLoop.OffsetChainInward(plane, -distance, offsetCornerType))).ToArray();
try {
outerBody.Subtract(innerBodies);
}
catch {
return(null);
}
if (outerBody == null)
{
return(null);
}
return(outerBody.Edges.Cast <ITrimmedCurve>().ToArray());
}
public static ICollection <ITrimmedCurve> OffsetAllLoops(this Face face, double distance, OffsetCornerType offsetCornerType)
{
Plane plane;
ITrimmedCurve[] outerLoop = null;
var innerLoops = new List <ITrimmedCurve[]>();
plane = face.Geometry as Plane;
if (plane == null)
{
throw new NotImplementedException();
}
Debug.Assert(face.Loops.Where(l => l.IsOuter).Count() == 1, "Multiple outer loops not implemented");
foreach (Loop loop in face.Loops)
{
if (loop.IsOuter)
{
outerLoop = loop.Edges.ToArray();
}
else
{
innerLoops.Add(loop.Edges.ToArray());
}
}
if (innerLoops.Count == 0)
{
return(outerLoop.OffsetChainInward(plane, distance, offsetCornerType));
}
throw new NotImplementedException();
// DTR throws exception in SpaceClaim
return(DoInWriteBlock <ICollection <ITrimmedCurve> >(() => OffsetChainInwardWithInnerLoops(face, distance, offsetCornerType, outerLoop, innerLoops)));
}
public static ICollection <ITrimmedCurve> OffsetAllLoops(this ICollection <ITrimmedCurve> curves, Plane plane, double distance, OffsetCornerType offsetCornerType)
{
Body body = Body.CreatePlanarBody(plane, curves);
Debug.Assert(body.Faces.Count == 1);
Face face = body.Faces.First();
return(face.OffsetAllLoops(distance, offsetCornerType));
}
