Can't get correct color

[GVladislavG]

I try to get color of IFCElements, using this code

                //Получим цвет
                XbimColour color = null;
                int styleId = instance.StyleLabel;
                if (styleId > 0)
                {
                    var ss = (IIfcSurfaceStyle)m_model.Instances[styleId];
                    var texture = XbimTexture.Create(ss);
                    color = texture.ColourMap.FirstOrDefault();
                }                

                if (color == null) color = XbimColour.DefaultColour;

                byte r = (Byte)(color.Red * 255);
                byte g = (Byte)(color.Green * 255);
                byte b = (Byte)(color.Blue * 255);
                byte a = (Byte)(color.Alpha * 255);

But I can't get right color for every element. For example walls are blue in BIM Vision, but they are grey in my application. Where is the problem?

[martin1cerny]

Can you share an IFC file with one of these walls?

[GVladislavG]

АР_модель.zip

[martin1cerny]

The blue colour in this case is assigned through the material list and definition representation #487= IFCMATERIALDEFINITIONREPRESENTATION($,$,(#485),#470); Xbim currently only handles single colour for a product, but rendering material layer sets or lists would require per-face colour handling. See #279

[GVladislavG]

So is there any way now to read this material list and to set correct blue color to a wall? Or this type of colors is not supported in current version? Thanks for your answers.

[martin1cerny]

You can read it from IFC directly and enhance the result. We do plan some support in the future, but it is not in the current version.

[GVladislavG]

I have the same problem with colors in IFC4 files. Is it because of the same reason? IFC4.zip

[martin1cerny]

This is a large file, so I'd like to ask you to create a minimal example with just a single IfcProduct.

[GVladislavG]

IFC4(small).zip

[GVladislavG]

And can you show me please a place in XbimEplorer source code, where getting of color happens? XbimEplorer shows incorrect colors but it's better than nothing in my case. Thanks.

[martin1cerny]

Which element has a wrong colour? The best sample file would be the one containing only the element in question.

[GVladislavG]

Blue color is wrong. It must be brown. Here's two more examples of incorrect colors in XBimExplorer

[GVladislavG]

Roofs have wrong colors in these XBimExplorer visualisations. BimVision shows correct colors. I also share these IFC-files RAC_basic_sample_project.zip IFC4.zip