exploring/layers/Program.cs

Refer to the Layers Example.

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// $Id$
//
// Copyright (C) 2008-2014, Roman Lygin. All rights reserved.
// Copyright (C) 2014-2023, CADEX. All rights reserved.
//
// This file is part of the CAD Exchanger software.
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using cadex;
using System;
using System.Runtime.InteropServices;
 
namespace layers
{
    class Program
    {
        // For more information see https://stackoverflow.com/questions/8836093/how-can-i-specify-a-dllimport-path-at-runtime
        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        static extern bool SetDllDirectory(string lpPathName);
 
        static int Main(string[] args)
        {
 
            // Add runtime path to CAD Exchanger libraries (e.g. compiled with Visual Studio 2015)
            SetDllDirectory("../../../../../../win64/vc14.1/bin");
 
            string aKey = LicenseKey.Value();
 
            // Activate the license (aKey must be defined in cadex_license.cs)
            if (!LicenseManager.Activate(aKey))
            {
                Console.WriteLine("Failed to activate CAD Exchanger license.");
                return 1;
            }
 
            if (args.Length != 1)
            {
                Console.WriteLine("Usage: " + System.Reflection.Assembly.GetExecutingAssembly().Location
                + " <input_file>, where:");
                Console.WriteLine("    <input_file>  is a name of the XML file to be read");
                return 1;
            }
 
            string aSource = args[0];
 
            ModelData_Model aModel = new ModelData_Model();
 
            if (!new ModelData_ModelReader().Read(new Base_UTF16String(aSource), aModel))
            {
                Console.WriteLine("Failed to read the file " + aSource);
                return 1;
            }
 
            // Check the model if it has any layer
            ModelData_Model.LayerIterator aLayerIt = new ModelData_Model.LayerIterator(aModel);
            if (!aLayerIt.HasNext())
            {
                // Create a visitor to fill its layers
                LayersFiller aVisitor = new LayersFiller();
                aModel.Accept(aVisitor);
 
                // Add created layers to the model
                aModel.AddLayer(aVisitor.SGELayer());
                aModel.AddLayer(aVisitor.SubShapesLayer());
            }
            LayersVisitor aLayerVisitor = new LayersVisitor();
            aModel.Accept(aLayerVisitor);
 
            return 0;
        }
    }
 
    // Visitor checks elements of specific layer
    class LayerItemVisitor : ModelData_Layer.ItemVisitor
    {
        public LayerItemVisitor()
        {
            myPartsNb = 0;
            myAssembliesNb = 0;
            myInstancesNb = 0;
            myShapesNb = 0;
        }
 
        public void GetElementsCount()
        {
            Console.WriteLine("Number of parts:      " + myPartsNb);
            Console.WriteLine("Number of assemblies: " + myAssembliesNb);
            Console.WriteLine("Number of instances:  " + myInstancesNb);
            Console.WriteLine("Number of shapes:     " + myShapesNb);
 
        }
 
        public override void Apply(ModelData_SceneGraphElement theSGE)
        {
            if (theSGE.TypeId() == ModelData_Part.GetTypeId())
            {
                ++myPartsNb;
            }
            else if (theSGE.TypeId() == ModelData_Assembly.GetTypeId())
            {
                ++myAssembliesNb;
            }
            else if (theSGE.TypeId() == ModelData_Instance.GetTypeId())
            {
                ++myInstancesNb;
            }
        }
 
        public override void Apply(ModelData_Shape theShape, ModelData_BRepRepresentation theRep)
        {
            ++myShapesNb;
        }
 
        private int myPartsNb;
        private int myAssembliesNb;
        private int myInstancesNb;
        private int myShapesNb;
    }
 
    // Visitor to explore model layers
    class LayersVisitor : ModelData_Model.LayerVisitor
    {
        public override void Apply(ModelData_Layer theLayer)
        {
            LayerItemVisitor aLayerItemVisitor = new LayerItemVisitor();
            theLayer.Accept(aLayerItemVisitor);
            Console.WriteLine("Layer " + theLayer.Name() + " contains:");
            aLayerItemVisitor.GetElementsCount();
 
        }
    }
 
    // Visitor used to add model's parts to layer
    class LayersFiller : ModelData_Model.CombinedElementVisitor
    {
        public LayersFiller()
        {
            ModelData_Layer mySubshapesLayer = new ModelData_Layer(new Base_UTF16String("SubshapesLayer"));
            ModelData_Layer mySGELayer = new ModelData_Layer(new Base_UTF16String("SGELayer"));
        }
 
        public ModelData_Layer SGELayer()
        {
            return mySGELayer;
        }
 
        public ModelData_Layer SubShapesLayer()
        {
            return mySubshapesLayer;
        }
 
        public override void Apply(ModelData_Part thePart)
        {
            mySGELayer.Add(thePart);
            ModelData_BRepRepresentation aBRep = thePart.BRepRepresentation();
            if (aBRep != null)
            {
                ModelData_BodyList aBodyList = aBRep.Get();
                for (uint i = 0; i < aBodyList.Size(); ++i)
                {
                    ModelData_Body aBody = aBodyList.Element(i);
                    aBRep.AddToLayer(aBody, mySubshapesLayer);
                }
            }
        }
 
        public override bool VisitEnter(ModelData_SceneGraphElement theElement)
        {
            mySGELayer.Add(theElement);
            return true;
        }
 
        private readonly ModelData_Layer mySubshapesLayer;
        private ModelData_Layer mySGELayer;
    }
}