Create Hatch

[thaiguer]

Hello,
Using the following code, I managed to create a Line and a Circle. But the Hatch isn't visible in the output file.

CadDocument newDoc = new CadDocument();

var line = new Line
{
    StartPoint = new CSMath.XYZ(0,0,0),
    EndPoint = new CSMath.XYZ(0,5,0)
};

var circle = new Circle
{
    Center = new CSMath.XYZ(5, 5, 0),
    Radius = 5
};

Hatch.BoundaryPath boundaryPath = new Hatch.BoundaryPath();
boundaryPath.Entities.Add(circle);

List<Hatch.BoundaryPath> boundaryPaths = new List<Hatch.BoundaryPath>();
boundaryPaths.Add(boundaryPath);

var hatch = new Hatch
{
    IsSolid = true,
    Paths = boundaryPaths,
    Color = Color.ByLayer,
    IsAssociative = false,
    Pattern = HatchPattern.Solid,
    IsInvisible = false
};

newDoc.ModelSpace.Entities.Add(line);
newDoc.ModelSpace.Entities.Add(circle);
newDoc.ModelSpace.Entities.Add(hatch);

using (DwgWriter writer = new DwgWriter(targetFile, newDoc))
{
    writer.Write();
}

Take a look at this image from the output file:

What am I missing in the code to be able to create the Hatch correctly?

Important detail: The Hatch is inside the file, but it is not visible.

[DomCR]

Hi @thaiguer

I'm not sure how Autocad handles the entities in the BoundaryPath I think they are only used as a reference, meaning that if you change the entity size the hatch is updated as well, but as far as I know, to draw a Hatch you need to create the edges, adding the entity doesn't do the trick.

So this line boundaryPath.Entities.Add(circle); is not creating anything, only referencing (I think).

Hope this helps.

[DomCR]

I guess that a useful feature would be to be able to create hatches using closed entities like, circles or polylines, I'll take a look at this.