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teocomi


Matteo Cominetti is a design technologist focusing on BIM, VDC, parametric design and open standards.


Image resolution of Viewpoints exported via Navisworks API

If you ever needed to export images of Navisworks Viewpoints or Snapshots using its API you might have probably incurred it the great article by Xiaodong Liang Workaround to export image of clash result. But the code, using Navisworks COM API, is exporting by default .png images that are just 256x256px big!

How do we change the image size and resolution?

I don’t know if there is a way to do it from the API, but it is possible by changing a hidden setting of Navisworks: click on the main Navisworks menu button and then holding the SHIFT key click “Options” (this will give you access to the advanced Options Editor). From here click Export>lcodpimage and set desired height and width.

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The code needed to export the images is the following:

// get the state of COM
ComApi.InwOpState10 oState = ComBridge.State;
// get the IO plugin for image
ComApi.InwOaPropertyVec options = oState.GetIOPluginOptions("lcodpimage");
// configure the option "export.image.format" to export png
foreach (ComApi.InwOaProperty opt in
		options.Properties())
{
	if (opt.name == "export.image.format")
		opt.value = "lcodpexpng";
}
string snapshot = @"C:\snapshot.png";
//export the viewpoint to the image
oState.DriveIOPlugin("lcodpimage", snapshot, options);
System.Drawing.Bitmap oBitmap = new System.Drawing.Bitmap(snapshot);
System.IO.MemoryStream ImageStream = new System.IO.MemoryStream();
oBitmap.Save(ImageStream, System.Drawing.Imaging.ImageFormat.Jpeg);
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