Why it is not drawing dotted or hidden lines? RhinoCommon Question

Rhino Developer
1

To whom it may concern:
Logically this code below should draw a hidden line. But it does not.

First I have created a layer called "Layer_A"
Then I have changed it’s lineTypeIndex.
Then I have assigned it to attribute and then draw a line from given points. The line should be hidden(dashed)
But it is giving normal. solid line.

It would be a big help, if some one would tell me what it wrong in this small code I wrote below.

protected override Result RunCommand(RhinoDoc doc, RunMode mode)
{
string layer_name = “Layer_A”;
doc.Layers.Add(layer_name, System.Drawing.Color.Blue);
int index = doc.Layers.Find(layer_name, true);

        doc.Layers.SetCurrentLayerIndex(index, true);
        Rhino.DocObjects.Layer layer = doc.Layers[index];

        layer.Color = System.Drawing.Color.Blue;
        layer.LinetypeIndex = 6;//doc.Linetypes.Count - 1;
        layer.CommitChanges();

        Rhino.DocObjects.ObjectColorSource ColorSource1 = Rhino.DocObjects.ObjectColorSource.ColorFromObject;
        // Rhino.DocObjects.ObjectLinetypeSource line_type_source = Rhino.DocObjects.ObjectLinetypeSource.LinetypeFromObject;
        Rhino.DocObjects.ObjectLinetypeSource LinetypeSource = Rhino.DocObjects.ObjectLinetypeSource.LinetypeFromLayer;
        System.Drawing.Color ObjectColor1 = System.Drawing.Color.Blue;
        Rhino.DocObjects.ObjectAttributes att = new Rhino.DocObjects.ObjectAttributes();
        att.ColorSource = ColorSource1;
        att.ObjectColor = ObjectColor1;
        att.LayerIndex = index;
        att.LinetypeIndex = 6;
        att.LinetypeSource = LinetypeSource;// Rhino.DocObjects.ObjectLinetypeSource.LinetypeFromLayer;
        Point3d Pt1 = new Point3d(68.6988, 522.559, 0);
        Point3d Pt2 = new Point3d(787.361, 522.559, 0);


        Line l_E = new Line(Pt1, Pt2);
        doc.Objects.AddLine(l_E,att);

        doc.Views.Redraw();

        return Result.Success;
    }
2

Does the layer show as having a linetype in the layer dialog?
If it does, maybe the linetype scale is too small

3

Linetypes are only displayed in Rhino when the PrintDisplay mode is on.

4

Layer_A should show LineType hidden but it is showing continuous.
Please have a look at the image attached. The last layer in the image is Layer_A is showing continuous,it should show as hidden, no?

5

PrintDisplay is ON. But the problem is, the code I wrote did not change the linetype in the layer table.
It is still showing as continuous. Please see the image.

6

Linetypes display whether or not PrintDisplay is on.
Maybe you’re thinking of lineweights.

7

It looks like your linetype index (6) is probably out of range.
When I changed that to a valid index, your code worked.
Then set linetype scale to something like 100 to see the pattern.

8

You’re right; I was confused

9

I have put line type index to 4
But it does not change to anything. In layer table it still shows continuous, unless I click on the layer table.
If I click on layer table then it changed to Border
It is not automated.
I needed to make it automated.
How to change the scale of the line texture?
Do you think I should write myself for the dashed line? If it does not work automated.

Many thanks !

10

I don’t know what to tell you about the "automatic " update - I copied your code and just changed the linetype index and it works right.

You can set the linetype scale with
doc.Linetypes.LinetypeScale = 100;

11

OK .Many Thanks!
Not sure why it was not changing the layer-table property before. Now I re-run and it works.

It is working now. when I wrote
layer.LinetypeIndex = doc.Linetypes.Count - 5;
doc.Linetypes.LinetypeScale = 100;