exploring/brep_topology/Program.cs

Refer to the B-Rep Topology Exploration Example.

// ****************************************************************************
// $Id$
//
// Copyright (C) 2008-2014, Roman Lygin. All rights reserved.
// Copyright (C) 2014-2025, CADEX. All rights reserved.
//
// This file is part of the Manufacturing Toolkit software.
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//
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using cadex;
using cadex.Collections;
using cadex.ModelData;
using cadex.Geom;
using System;
using System.Collections.Generic;
 
namespace brep_topology
{
    class Program
    {
        static int Main(string[] args)
        {
            string aKey = MTKLicenseKey.Value();
 
            // Activate the license (aKey must be defined in mtk_license.cs)
            if (!LicenseManager.Activate(aKey))
            {
                Console.WriteLine("Failed to activate Manufacturing Toolkit 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 file to be read");
                Console.WriteLine($"");
                return 1;
            }
 
            string aSource = args[0];
 
            Model aModel = new Model();
 
            if (!new ModelReader().Read(new UTF16String(aSource), aModel))
            {
                Console.WriteLine("Failed to read the file " + aSource);
                return 1;
            }
 
            // Explore B-Rep representation of model parts
            PartBRepVisitor aVisitor = new PartBRepVisitor();
            aModel.Accept(aVisitor);
 
            aVisitor.PrintUniqueShapesCount();
 
            return 0;
        }
    }
 
    // Visits directly each part and calls B-Rep bodies exploring if a part has one
    class PartBRepVisitor : ModelElementVoidVisitor
    {
        public PartBRepVisitor()
        {
            myNestingLevel = 0;
        }
 
        public void PrintUniqueShapesCount()
        {
            Console.WriteLine();
            Console.WriteLine("Total unique shapes count: " + myShapeSet.Count);
        }
 
        public override void Apply(Part thePart)
        {
            Console.WriteLine("Part = \"" + thePart.Name() + "\"");
            var aBodies = thePart.Bodies();
            if (!aBodies.IsEmpty)
            {
                ExploreBRep(aBodies);
            }
        }
 
        private void ExploreBRep(BodyList theBodies)
        {
            myNestingLevel++;
            int i = 0;
            // Iterate over bodies
            foreach (var aBody in theBodies)
            {
 
                PrintTabulation();
                Console.WriteLine("Body " + i + ": type " + PrintBodyType(aBody));
                ++i;
 
                ShapeIterator aFaceIt = new ShapeIterator(aBody);
                for (var j = new ShapeIterator(aBody); j.HasNext();)
                {
                    var aShape = j.Next();
                    ExploreShape(aShape);
                }
            }
            myNestingLevel--;
        }
 
        // Recursive iterating over the Shape until reaching vertices
        private void ExploreShape(Shape theShape)
        {
            myShapeSet.Add(theShape);
            ++myNestingLevel;
            ShapeIterator aShapeIt = new ShapeIterator(theShape);
            while (aShapeIt.HasNext())
            {
                Shape aShape = aShapeIt.Next();
                PrintShapeInfo(aShape);
                ExploreShape(aShape);
            }
            --myNestingLevel;
        }
 
        // Returns body type name
        private string PrintBodyType(Body theBody)
        {
            if (SheetBody.CompareType(theBody))
            {
                return "Sheet";
            }
            else if (SolidBody.CompareType(theBody))
            {
                return "Solid";
            }
            else if (WireframeBody.CompareType(theBody))
            {
                return "Wireframe";
            }
 
            return "Undefined";
        }
 
        // Prints shape type name and prints shape info in some cases
        private void PrintShapeInfo(Shape theShape)
        {
            PrintTabulation();
 
            switch (theShape.Type())
            {
                case ShapeType.Solid: Console.Write("Solid"); break;
                case ShapeType.Shell: Console.Write("Shell"); break;
                case ShapeType.Wire:
                    Console.Write("Wire");
                    PrintWireInfo(Wire.Cast(theShape));
                    break;
                case ShapeType.Face:
                    Console.Write("Face");
                    PrintFaceInfo(Face.Cast(theShape));
                    break;
                case ShapeType.Edge:
                    Console.Write("Edge");
                    PrintEdgeInfo(Edge.Cast(theShape));
                    break;
                case ShapeType.Vertex:
                    Console.Write("Vertex");
                    PrintVertexInfo(Vertex.Cast(theShape));
                    break;
                default: Console.Write("Undefined"); break;
            }
            Console.WriteLine();
        }
 
        private void PrintOrientationInfo(Shape theShape)
        {
            Console.Write(". Orientation: ");
            switch (theShape.Orientation())
            {
                case ShapeOrientation.Forward: Console.Write("Forward"); break;
                case ShapeOrientation.Reversed: Console.Write("Reversed"); break;
                default:
                    break;
            }
        }
 
        private void PrintWireInfo(Wire theWire)
        {
            ++myNestingLevel;
            PrintOrientationInfo(theWire);
            --myNestingLevel;
        }
 
        public void PrintFaceInfo(Face theFace)
        {
            ++myNestingLevel;
            PrintOrientationInfo(theFace);
            Console.WriteLine();
            Surface aSurface = theFace.Surface();
            PrintTabulation();
 
            Console.Write("Surface: " + PrintSurfaceType(aSurface));
 
            --myNestingLevel;
        }
 
        private string PrintSurfaceType(Surface theSurface)
        {
            switch (theSurface.Type())
            {
                case SurfaceType.Plane: return "Plane";
                case SurfaceType.Cylinder: return "Cylinder";
                case SurfaceType.Cone: return "Cone";
                case SurfaceType.Sphere: return "Sphere";
                case SurfaceType.Torus: return "Torus";
                case SurfaceType.LinearExtrusion: return "LinearExtrusion";
                case SurfaceType.Revolution: return "Revolution";
                case SurfaceType.Bezier: return "Bezier";
                case SurfaceType.BSpline: return "BSpline";
                case SurfaceType.Offset: return "Offset";
                default:
                    break;
            }
            return "Undefined";
        }
 
        private void PrintEdgeInfo(Edge theEdge)
        {
            ++myNestingLevel;
            if (theEdge.IsDegenerated())
            {
                Console.Write("(Degenerated)");
            }
            PrintOrientationInfo(theEdge);
            Console.Write(". Tolerance " + theEdge.Tolerance());
 
            if (!theEdge.IsDegenerated())
            {
                Console.WriteLine();
                double aParamFirst = 0.0, aParamLast = 0.0;
                Curve aCurve = theEdge.Curve(out aParamFirst, out aParamLast);
                PrintTabulation();
                Console.Write("Curve: " + PrintCurveType(aCurve));
            }
            --myNestingLevel;
        }
 
        private string PrintCurveType(Curve theCurve)
        {
            switch (theCurve.Type())
            {
                case CurveType.Line: return "Line";
                case CurveType.Circle: return "Circle";
                case CurveType.Ellipse: return "Ellipse";
                case CurveType.Hyperbola: return "Hyperbola";
                case CurveType.Parabola: return "Parabola";
                case CurveType.Bezier: return "Bezier";
                case CurveType.BSpline: return "BSpline";
                case CurveType.Offset: return "Offset";
                default:
                    break;
            }
            return "Undefined";
        }
 
        private void PrintVertexInfo(Vertex theVertex)
        {
            PrintOrientationInfo(theVertex);
            Console.Write(". Tolerance " + theVertex.Tolerance());
        }
 
        private void PrintTabulation()
        {
            for (int i = 0; i < myNestingLevel; ++i)
            {
                Console.Write("- ");
            }
        }
 
        // Set to collect unique shapes from model
        private HashSet<Shape> myShapeSet = new HashSet<Shape>(new UnorientedShapeHash());
        private int myNestingLevel;
    }
}