exploring/polyrepresentation/polyrepresentation.java

Refer to the Polygonal Representation Example.

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// $Id$
//
// Copyright (C) 2008-2014, Roman Lygin. All rights reserved.
// Copyright (C) 2014-2023, CADEX. All rights reserved.
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// This file is part of the CAD Exchanger software.
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import cadex.*;
 
public class polyrepresentation {
    static {
        try {
            System.loadLibrary("CadExCore");
        } catch (UnsatisfiedLinkError e) {
            System.err.println("Native code library failed to load.\n" + e);
            System.exit(1);
        }
    }
 
    public static void main(String[] args) {
        String aKey = LicenseKey.Value();
 
        // Activate the license (aKey must be defined in LicenseKey.java)
        if (!LicenseManager.Activate(aKey)) {
            System.out.println("Failed to activate CAD Exchanger license.");
            System.exit(1);
        }
 
        if (args.length != 1) {
            System.out.println("Usage: " + " <input_file>, where:");
            System.out.println("    <input_file>  is a name of the XML file to be read");
            System.exit(1);
        }
 
        String aSource = args[0];
 
        ModelData_Model aModel = new ModelData_Model();
        ModelData_ModelReader aReader = new ModelData_ModelReader();
        if (!aReader.Read(new Base_UTF16String(aSource), aModel)) {
            System.out.println("Failed to read the file");
            System.exit(1);
        }
 
        // If there is no Poly representation in the model, mesher will compute it
        ModelAlgo_BRepMesherParameters aParams = new ModelAlgo_BRepMesherParameters();
        aParams.SetGranularity(ModelAlgo_BRepMesherParameters.Granularity.Fine);
        ModelAlgo_BRepMesher aMesher = new ModelAlgo_BRepMesher(aParams);
        aMesher.Compute(aModel);
 
        // Explore Poly representation of model parts
        PartPolyVisitor aVisitor = new PartPolyVisitor();
        aModel.Accept(aVisitor);
    }
}
 
// Visits directly every part and calls Poly representation exploring if a part has one
class PartPolyVisitor extends ModelData_Model.VoidElementVisitor {
    @Override
    public void Apply(ModelData_Part thePart) {
        ModelData_PolyRepresentation aPolyRep = thePart.PolyRepresentation(ModelData_RepresentationMask.ModelData_RM_Poly);
        if (aPolyRep != null) {
            ExplorePoly(aPolyRep);
        }
    }
 
    // Explores PolyVertexSets of Poly representation
    private void ExplorePoly(ModelData_PolyRepresentation thePoly) {
        // Get() method retrieves PolyVertexSets listed in Poly representation by calling data providers flushing
        // Because of internal mechanics providers flushing is faster than for B-Rep representations
        ModelData_PolyShapeList aList = thePoly.Get();
 
        // Iterate over PolyShape list
        for (int i = 0; i < aList.Size(); ++i) {
            ModelData_PolyVertexSet aPVS = aList.Access(i);
            System.out.println("PolyShape " + i + ":");
            PrintPVSInfo(aPVS);
        }
    }
 
    // Function to print a PolyVertexSet info
    private void PrintPVSInfo(ModelData_PolyVertexSet thePVS) {
        if (thePVS.TypeId() == ModelData_IndexedTriangleSet.GetTypeId()) {
            System.out.println("IndexedTriangleSet type.");
            ModelData_IndexedTriangleSet anITS = ModelData_IndexedTriangleSet.Cast(thePVS);
            DumpTriangleSet(anITS);
        } else if (thePVS.TypeId() == ModelData_PolyLineSet.GetTypeId()) {
            System.out.println("PolyLineSet type");
            ModelData_PolyLineSet aPLS = ModelData_PolyLineSet.Cast(thePVS);
            DumpPolyLineSet(aPLS);
        } else if (thePVS.TypeId() == ModelData_PolyPointSet.GetTypeId()) {
            System.out.println("PolyPointSet type");
            ModelData_PolyPointSet aPPS = ModelData_PolyPointSet.Cast(thePVS);
            DumpPolyPointSet(aPPS);
        } else {
            System.out.println("Undefined type");
        }
    }
 
    private void DumpPolyPointSet(ModelData_PolyPointSet thePS) {
        int n = thePS.NumberOfVertices();
 
        System.out.println("PolyPoint set contains " + n + " vertices");
        for (int i = 0; i < n; ++i) {
            System.out.println("Point " + i + ":");
            System.out.println("    Node coordinates:");
            ModelData_Point aP = thePS.Coordinate(i);
            System.out.println("    (" + aP.X() + ", " + aP.Y() + ", " + aP.Z() + ")");
        }
    }
 
    // Prints number of PolyLines and local coordinates for every vertex of each PolyLine
    private void DumpPolyLineSet(ModelData_PolyLineSet thePLS) {
        int n = thePLS.NumberOfPolyLines();
 
        System.out.println("PolyLine set contains " + n + " PolyLines");
        for (int i = 0; i < n; ++i) {
            System.out.println("PolyLine " + i + ":");
            System.out.println("    Node coordinates:");
            for (int j = 0; j < thePLS.NumberOfVertices(i); ++j) {
                ModelData_Point aV = thePLS.Coordinate(i, j);
                System.out.println("    (" + aV.X() + ", " + aV.Y() + ", " + aV.Z() + ")");
            }
        }
    }
 
    // Prints number of triangles and local data for each node
    // Prints Coords and UV-Coords for each vertex and prints Normals and Colors for each triangle
    private void DumpTriangleSet(ModelData_IndexedTriangleSet theTS) {
        int n = theTS.NumberOfFaces();
 
        System.out.println("Triangle set contains " + n + " Triangles");
        for (int i = 0; i < n; ++i) {
            System.out.println("Triangle " + i + ":");
 
            for (int j = 0; j < 3; ++j) {
                System.out.println("Node: " + j);
 
                // Coordinates
                System.out.println("    Node coordinates:");
                ModelData_Point aV = theTS.Coordinate(i, j);
                System.out.println("    (" + aV.X() + ", " + aV.Y() + ", " + aV.Z() + ")");
 
                // UV-coordinates
                if (theTS.HasUVCoordinates()) {
                    System.out.println("    UV coordinates:");
                    ModelData_Point2d aUV = theTS.UVCoordinate(i, j);
                    System.out.println("    (" + aUV.X() + ", " + aUV.Y() + ")");
                }
 
                // Normals
                if (theTS.HasNormals()) {
                    ModelData_Vectorf aN = theTS.VertexNormal(i, j);
                    System.out.println("    Normal: (" + aN.X() + ", " + aN.Y() + ", " + aN.Z() + ")");
                }
 
                // Colors
                if (theTS.HasColors()) {
                    ModelData_Color aColor = theTS.VertexColor(i, j);
                    System.out.println(
                            "    Color (RGB):     (" + aColor.R() + ", " + aColor.G() + ", " + aColor.B() + ", " + aColor.A() + ")");
                }
            }
        }
    }
}