How-To (HPS): Select and highlight sub-entity geometry

Visualization Solutions HOOPS Visualize Desktop
1

Below is sample code on how you select and highlight sub-entity geometry.

Note: You will need to enable sub-entity option in both selection and highlighting kit.

    HPS::SelectionOptionsKit myKit;
    myKit.GetDefault();


    HPS::SegmentKey modelKey = GetCanvas().GetFrontView().GetAttachedModel().GetSegmentKey();


	Point points[4] = { Point(0, 0, 0),
				   Point(2, 0, 0),
				   Point(2, 2, 0),
				   Point(0, 2, 0) };

	int faceList[5] = { 4, 0, 1, 2, 3 };


    modelKey.GetSelectabilityControl().SetVertices(true);
    modelKey.Subsegment().InsertShell(4, points, 5, faceList);
    modelKey.GetVisibilityControl().SetFaces(false).SetEdges(false).SetVertices(true);
    modelKey.GetMarkerAttributeControl().SetSize(2);

    GetCanvas().GetFrontView().FitWorld();
    GetCanvas().UpdateWithNotifier().Wait();

    // Set Highlight Style

    HPS::PortfolioKey portfolio = GetCanvas().GetFrontView().GetAttachedModel().GetPortfolioKey();

	SegmentKey style1_source = Database::CreateRootSegment();
	NamedStyleDefinition style1 = portfolio.DefineNamedStyle("style1", style1_source);
    style1_source.GetMaterialMappingControl()
        .SetVertexColor(RGBAColor(1.0f, 0.0f, 0.0f));
	auto options1 = HighlightOptionsKit("style1");
    options1.SetSubentityHighlighting(true);


	/// <summary>
	/// 
	/// </summary>
	HPS::SelectionOptionsKit selectionOptions;
	selectionOptions.SetAlgorithm(HPS::Selection::Algorithm::Analytic);
	selectionOptions.SetLevel(HPS::Selection::Level::Subentity);
    selectionOptions.SetInternalLimit(-1).SetRelatedLimit(-1);


	HPS::SelectionResults selectionResults;

	// specify the window-space rectangle where you want to select
	size_t numSelectedItems =
		GetCanvas().GetWindowKey().GetSelectionControl().SelectByArea(HPS::Rectangle(0, 1, -1, 1), selectionOptions, selectionResults);

	HPS::SelectionResultsIterator srIterator = selectionResults.GetIterator();

	while (srIterator.IsValid()) {
		HPS::SelectionItem selectionItem = srIterator.GetItem();
		HPS::Key key;
		selectionItem.ShowSelectedItem(key); // 'key' is the HPS::Key of the selected item

		if (key.Type() == HPS::Type::ShellKey) {
			// if we get here, the shell has selected at least one sphere


			HPS::SizeTArray out_faces, out_vertices, edges1, edges2;

			// out_faces is a list of faces
			selectionItem.ShowFaces(out_faces);

			// out_vertices is list of vertices
			selectionItem.ShowVertices(out_vertices);

			// edges1 and edges2 are parallel
			selectionItem.ShowEdges(edges1, edges2);

            HPS::KeyPath selectionKeyPath;
            selectionItem.ShowPath(selectionKeyPath);


            GetCanvas().GetWindowKey().GetHighlightControl().Highlight(key, options1, out_vertices, edges1, edges2, out_faces);

            GetCanvas().UpdateWithNotifier().Wait();


		}

		srIterator.Next();
	}