C# - How can I get a Point2d of LcOpRedlineText when mouse down

Anonymous — Mon, 06 Mar 2017 03:04:03 GMT

As shown in <Figure 1>, When I input redlineText and export it as xml, the input point x=0.4362201927 y=0.0945143751 as shown in <Figure 2>

However, when I look at the actual mouse down event, the postion is 1039,498 as shown in <Figure 2>.

I wonder how it turns out to be a decimal point like that.

I'd like to input the text directly at the point I'm taking, but is there any way to know where?

[My C# Function]

public void CreateRedline()
{

LcOpRedlineText redlineText = new LcOpRedlineText("Mouse Down", new Point2D(x,y)[Wanted Postion] );

SavedViewpoint svp = API.ActiveDocument.SavedViewpoints.CurrentSavedViewpoint as SavedViewpoint;
svp.Redlines.Add(redlineText);
}

Re: C# - How can I get a Point2d of LcOpRedlineText when mouse down

logikgate — Tue, 04 Apr 2017 17:16:24 GMT

Hi @Anonymous

Since the Redline API isn't officially supported by Navisworks the best I can do is give you an approximate answer, so here it goes.

Your mouse click coordinates are in Screen space whereas it appears that each redline item is created and stored in Camera space. I say "appears" because there is no documentation of this but after some testing I believe this is true.

There are some hidden static methods in the Navisworks API that can help with the conversion. Namely LcOpRedline.ScreenToWindowSpace() and LcOpRedline.WindowToCameraSpace(). Below is some pseudo code that converts a point from Screen space to Camera space that should get you on the right track

using Autodesk.Navisworks.Api;
using Autodesk.Navisworks.Api.Interop;

public static Point2D ScreenToCameraSpace(Point2D pointScreenSpace)
{
 // Note: the Viewer property is also a part of the "hidden" api so it is not officially supported
 LcOaViewer viewer = Application.ActiveDocument.ActiveView.Viewer;

 var pointWindowSpace = LcOpRedline.ScreenToWindowSpace(viewer, pointScreenSpace);
 var pointCameraSpace = LcOpRedline.WindowToCameraSpace(viewer, pointWindowSpace);

 return pointCameraSpace;
}

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C# - How can I get a Point2d of LcOpRedlineText when mouse down

Re: C# - How can I get a Point2d of LcOpRedlineText when mouse down