topic Re: Export Image is cutting few pixels from image corners in Revit API Forum

Export Image is cutting few pixels from image corners

alexpaduroiu — Thu, 27 Feb 2020 15:32:59 GMT

Hello there!

I have a small problem regarding Decoument.ExportImage(ImageExportOptions options);

I am trying to export a set of drafting views but somehow the generated images cuts the views edges.

the Images:

And this image has the bottom part not visible at all:

The cut is very small but very frustrating because I can't make it a whole or even offset the element to fit the images.

Image Export Options used:

ImageExportOptions imgExportOpts = new ImageExportOptions()
{
ZoomType = ZoomFitType.FitToPage,
PixelSize = 500,
FilePath = rbrImagesDirectory + @"\",
FitDirection = FitDirectionType.Vertical,
HLRandWFViewsFileType = ImageFileType.PNG,
ShadowViewsFileType = ImageFileType.PNG,
ImageResolution = ImageResolution.DPI_72,
ShouldCreateWebSite = false,
};

imgExportOpts.ExportRange = ExportRange.SetOfViews

I have tried to modify FitDirectionType.Horizontal and this makes it worse than it is now by cutting the bottom portion even more -> in that case for the first image, the bottom part of the bar is not visible at all.

The image doesn't have such a big cut in the edges but it will be nice to have some spaces there or at least to see the parts 🙂

Please let me know if there is any way to zoom out the element or move it in order to be arranged better in image.

Thank you!

Re: Export Image is cutting few pixels from image corners

jeremytammik — Thu, 27 Feb 2020 16:34:17 GMT

Please submit a minimal reproducible case that I can share with the development team for further analysis:

https://thebuildingcoder.typepad.com/blog/about-the-author.html#1b

Thank you!

Re: Export Image is cutting few pixels from image corners

alexpaduroiu — Thu, 28 May 2020 07:12:20 GMT

Sorry for the very very late reply. 😓

I was caught with other projects and lots of work.

Well I have solved the problem!

The problem was with the drafting view I was trying to export. After creating a group of details in the Drafting view, somehow the outline of the view wasn't big enough to include my details. don't know sure why but what i have done to resolve the problem was the following:

drafting.CropBoxActive = true; drafting.CropBoxVisible = true; private static void ExtendViewCrop(View drafting, Group detail) { BoundingBoxXYZ crop = (drafting!= null ? drafting.CropBox : null); if (crop == null || crop.Max == null || crop.Min == null || crop.Transform == null || detail == null) return; BoundingBoxXYZ detailBox = detail.get_BoundingBox(drafting); BoundingBoxXYZ extendedCrop = new BoundingBoxXYZ(); extendedCrop.Transform = crop.Transform; if (detailBox == null || detailBox.Max == null || detailBox.Min == null) return; extendedCrop.Max = detailBox.Max + (extendedCrop.Transform.BasisX + extendedCrop.Transform.BasisY / 2) * 0.03; extendedCrop.Min = detailBox.Min + (-extendedCrop.Transform.BasisX + -extendedCrop.Transform.BasisY / 2) * 0.03; drafting.CropBox = extendedCrop; }

So basically extending the view crops max and min on their direction with a small value so the detail will fit in my drafting.

I am sure that there are lots of other better options doing this, but for now it made the trick. Of course I am opened to more solutions:D

Re: Export Image is cutting few pixels from image corners

jeremy_tammik — Mon, 08 Aug 2022 15:40:29 GMT

Looks good to me! Thank you for sharing the solution.

Re: Export Image is cutting few pixels from image corners

Iev60047 — Tue, 09 Aug 2022 22:29:58 GMT

Is there a .cs file someone could share with me of this completed code? I am trying to get the same code to run. Thank you!

Well, I am still struggling, but I think I know better questions: what class is the drafting variable? If I defined view instead of drafting would I write:

View view = doc.ActiveView;

and should I define this before the private static void ExtendVeiwCrop(View view) function?

Re: Export Image is cutting few pixels from image corners

Iev60047 — Wed, 10 Aug 2022 20:10:58 GMT

I feel like I am getting closer, but still no luck. I am getting a Modification outside transaction attempt. I tried handling it by wrapping my one adjustment to the model (adjusting the crop box), but that didn't help.

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using Autodesk.Revit.ApplicationServices; using Autodesk.Revit.Attributes; using Autodesk.Revit.DB; using Autodesk.Revit.UI; using Autodesk.Revit.UI.Selection; using Autodesk.Revit.DB.Architecture; namespace AdjustCropView { [Transaction(TransactionMode.Manual)] [Regeneration(RegenerationOption.Manual)] public class Class1 : IExternalCommand { public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements) { //Get application UIApplication uiapp = commandData.Application; //Get document objects Document doc = uiapp.ActiveUIDocument.Document; //Get active view View view = doc.ActiveView; //Turn on crob box and its visibility view.CropBoxActive = true; view.CropBoxVisible = true; //Create bounding box objects BoundingBoxXYZ crop = view.CropBox; BoundingBoxXYZ detailBox = view.get_BoundingBox(view); BoundingBoxXYZ extendedCrop = new BoundingBoxXYZ(); extendedCrop.Transform = crop.Transform; //Modifying the extended crop box extendedCrop.Max = detailBox.Max + (extendedCrop.Transform.BasisX + extendedCrop.Transform.BasisY / 2) * 0.03; extendedCrop.Min = detailBox.Min + (-extendedCrop.Transform.BasisX + -extendedCrop.Transform.BasisY / 2) * 0.03; using (Transaction tr = new Transaction(doc)) { tr.Start("Transform crop view"); view.CropBox = extendedCrop; tr.Commit(); } return Result.Succeeded; } } }

Re: Export Image is cutting few pixels from image corners

EATREVITPOOPCAD — Wed, 10 Aug 2022 21:21:34 GMT

@Iev60047 You are getting an error that you are trying to make a change to a revit model outside of a transaction. All changes made to a model need to happen inside a transaction.

My guess is that you enabling the crop box and showing it is the issue... (It is a change to the model)

Try this:

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using Autodesk.Revit.ApplicationServices; using Autodesk.Revit.Attributes; using Autodesk.Revit.DB; using Autodesk.Revit.UI; using Autodesk.Revit.UI.Selection; using Autodesk.Revit.DB.Architecture; namespace AdjustCropView { [Transaction(TransactionMode.Manual)] [Regeneration(RegenerationOption.Manual)] public class Class1 : IExternalCommand { public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements) { //Get application UIApplication uiapp = commandData.Application; //Get document objects Document doc = uiapp.ActiveUIDocument.Document; using (Transaction tr = new Transaction(doc)) { tr.Start("Transform crop view"); //Get active view View view = doc.ActiveView; //Turn on crob box and its visibility view.CropBoxActive = true; view.CropBoxVisible = true; //Create bounding box objects BoundingBoxXYZ crop = view.CropBox; BoundingBoxXYZ detailBox = view.get_BoundingBox(view); BoundingBoxXYZ extendedCrop = new BoundingBoxXYZ(); extendedCrop.Transform = crop.Transform; //Modifying the extended crop box extendedCrop.Max = detailBox.Max + (extendedCrop.Transform.BasisX + extendedCrop.Transform.BasisY / 2) * 0.03; extendedCrop.Min = detailBox.Min + (-extendedCrop.Transform.BasisX + -extendedCrop.Transform.BasisY / 2) * 0.03; view.CropBox = extendedCrop; tr.Commit(); } return Result.Succeeded; } } }

Re: Export Image is cutting few pixels from image corners

Iev60047 — Wed, 10 Aug 2022 21:30:36 GMT

@EATREVITPOOPCAD Thanks again. I enclosed that in. In the meantime I figured there's no way that my code will work because

BoundingBoxXYZ detailBox = view.get_BoundingBox(view);

is not going to do anything. I need to get a bounding box (I assume this will assume the same boundary as zoomtofit) of the active elements in the view. This means I need to filter for visible element Id's (I think).

//Create empty variable to contain element Id's. ElementId elemId = null; //Get visible element Id's using filtered collector. FilteredElementCollector collector = new FilteredElementCollector(doc, elemId);

This code is not working and I'm stumped again. Learning a lot though! I feel closer to the solution. Also, as a side note, I know that I want only 2D views, so I think the class BoundingBoxUV may be more appropriate for my application, but I'll be fine if I can get it to work with the class BoundingBoxXYZ.

Edit: I also find it odd that I can't look up get_BoundingBox up in the Revit API doc. Am I missing another piece of documentation this filter/constructor exists on?

Re: Export Image is cutting few pixels from image corners

EATREVITPOOPCAD — Wed, 10 Aug 2022 22:06:10 GMT

Try this

view.get_BoundingBox(null)

And here is the documentation

https://www.revitapidocs.com/2016/def2f9f2-b23a-bcea-43a3-e6de41b014c8.htm