Display Conduit - Drawing in specific Viewports

Rhino Developer
, ,
1

I have successfully drawn 2d shapes over all rhino Views using the samples for Display Conduit.’ What I would like to do is to only draw my text/shapes on a specific viewport. I cannot find a method in Displaypipeline to select which view to draw in. is this functionality supported?

This is for the scenario where I will be using a specific viewport that enables the user to interact with different and would like to display information only in this viewport.

Thanks in advance for any help or tips!

2

You can get the ViewPort object from the display pipeline, and then the name of the viewport. Based on that, decide what to draw.

https://developer.rhino3d.com/api/RhinoCommon/html/T_Rhino_Display_RhinoViewport.htm

3

Thanks, Menno for the reply. Unfortunately, I am still unaware of what the process for that would be. I have included my code example where this would be called. I am not able to find Viewport methods that suggest a draw selection. I must be missing some knowledge about this. I will have a further look into this but if you have a suggestion to help me along the way that would great!

protected override void DrawForeground(Rhino.Display.DrawEventArgs e)
    {
        var bounds = e.Viewport.Bounds;
        var pt = new Rhino.Geometry.Point2d(bounds.Right - 100, bounds.Bottom - 30);
        bounds.Inflate(-10, -10);
        e.Display.Draw2dRectangle(bounds, System.Drawing.Color.White, 4, System.Drawing.Color.Transparent);

        // Get RhinoViewport and then decide what to draw with it?
        RhinoViewport rvp = RhinoDoc.ActiveDoc.Views.ActiveView.DisplayPipeline.Viewport;
    }
4

The DrawEventArgs e contains a reference to the DisplayPipeline called Display:

if (e.Display.ViewPort.Name == "Perspective") 
{
  // draw only in Perspective view port
}
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5

Perfect! Thank you, Menno for helping me understand the way the events are working n this case.

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