How to Set Model Line Colors in Revit Development

Setting Model Line Colors in Revit Development

There are two main methods to set the color of model lines in Revit:

1. Setting the line style

2. Using OverrideGraphicSettings

The first method involves creating and defining a new line style, then applying this style to the model line. The second method is view-specific, where the graphics are overridden only within the current view.

Below is the essential code for each method:

Creating a New Line Style

Category tCat = doc.Settings.Categories.get_Item(BuiltInCategory.OST_Lines);

Reference r = uidoc.Selection.PickObject(ObjectType.Element);

Element elem = doc.GetElement(r);

Transaction trans = new Transaction(doc, "Trans");

trans.Start();

if (!tCat.SubCategories.Contains("MyLine"))

{

Category nCat = doc.Settings.Categories.NewSubcategory(tCat, "MyLine");

nCat.LineColor = new Color(255, 0, 0);

}

doc.Regenerate();

FilteredElementCollector temc = new FilteredElementCollector(doc);

temc.OfClass(typeof(GraphicsStyle));

GraphicsStyle mgs = temc.First(m => (m as GraphicsStyle).GraphicsStyleCategory.Name == "MyLine") as GraphicsStyle;

Parameter tp = elem.LookupParameter("Line Style");

tp.Set(mgs.Id);

trans.Commit();

Overriding Graphics in the View

Reference r = uidoc.Selection.PickObject(ObjectType.Element);

Element elem = doc.GetElement(r);

OverrideGraphicSettings ogs = v.GetElementOverrides(elem.Id);

Transaction trans = new Transaction(doc, "trans");

trans.Start();

ogs.SetProjectionLineColor(new Color(255, 0, 0));

v.SetElementOverrides(elem.Id, ogs);

trans.Commit();

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About Revit Model Line Colors

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