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meshing/lods/Program.cs

Refer to the Level of Details (LOD's) Example.

// ****************************************************************************
// $Id$
//
// 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.
//
// You may use this file under the terms of the BSD license as follows:
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// POSSIBILITY OF SUCH DAMAGE.
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// ****************************************************************************
using cadex;
using System;
using System.Runtime.InteropServices;
namespace lods
{
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;
}
ModelData_BRepRepresentation aBRep = CreateSphereBRep(new ModelData_Point(0.0, 0.0, 0.0), 10);
ModelData_Part aPart = new ModelData_Part(aBRep, new Base_UTF16String("Sphere"));
AddPolyToPart(aPart, ModelAlgo_BRepMesherParameters.Granularity.Coarse);
AddPolyToPart(aPart, ModelAlgo_BRepMesherParameters.Granularity.Medium);
AddPolyToPart(aPart, ModelAlgo_BRepMesherParameters.Granularity.Fine);
aModel.AddRoot(aPart);
if (!new ModelData_ModelWriter().Write(aModel, new Base_UTF16String("SphereWithLODs.cdx")))
{
Console.WriteLine("Unable to save the model");
return 1;
}
return 0;
}
private static int NumberOfTriangles(ModelData_PolyRepresentation thePoly)
{
int trianglesNB = 0;
ModelData_PolyShapeList aList = thePoly.Get();
for (uint i = 0; i < aList.Size(); ++i)
{
ModelData_PolyVertexSet aPVS = aList.Element(i);
if (aPVS.TypeId() == ModelData_IndexedTriangleSet.GetTypeId())
{
trianglesNB += anITS.NumberOfFaces();
}
}
return trianglesNB;
}
private static ModelData_BRepRepresentation CreateSphereBRep(ModelData_Point thePosition, double theRadius)
{
ModelData_Solid aSphere = ModelAlgo_TopoPrimitives.CreateSphere(thePosition, theRadius);
return aBRep;
}
private static void AddPolyToPart(ModelData_Part thePart, ModelAlgo_BRepMesherParameters.Granularity theLOD)
{
ModelData_PolyRepresentation aPoly = aMesher.Compute(aBRep);
thePart.AddRepresentation(aPoly);
Console.WriteLine("A polygonal representation with " + NumberOfTriangles(aPoly) + " triangles has been added");
}
}
}
Defines a Unicode (UTF-16) string wrapping a standard string.
Definition: Base_UTF16String.hxx:34
Computes a polygonal representation from a B-Rep one.
Definition: ModelAlgo_BRepMesher.hxx:48
void Compute(const ModelData_Model &theModel, bool theEnforceAddition=false) const
Computes polygonal representations for all parts in the model.
Definition: ModelAlgo_BRepMesher.cxx:478
Defines parameters used by the B-Rep mesher.
Definition: ModelAlgo_BRepMesherParameters.hxx:33
Granularity
Defines target accuracy of the mesh to be generated.
Definition: ModelAlgo_BRepMesherParameters.hxx:35
Creates B-Rep solid primitives.
Definition: ModelAlgo_TopoPrimitives.hxx:43
static ModelData_Solid CreateSphere(double theRadius, double theU=2 *M_PI, double theVmin=-M_PI_2, double theVmax=M_PI_2)
Creates a sphere.
Definition: ModelAlgo_TopoPrimitives.cxx:148
Defines precise Boundary Representation of part.
Definition: ModelData_BRepRepresentation.hxx:39
IdType TypeId() const
Returns an object type id.
Definition: ModelData_BaseObject.cxx:199
Defines a root topological shape that can be owned by B-Rep representation.
Definition: ModelData_Body.hxx:28
static ModelData_Body Create(const ModelData_Shape &theShape)
Creates a body from an arbitrary shape.
Definition: ModelData_Body.cxx:223
Defines a polygonal shape consisting of triangles.
Definition: ModelData_IndexedTriangleSet.hxx:35
IndexType NumberOfFaces() const
Returns a number of faces (triangles).
Definition: ModelData_IndexedTriangleSet.cxx:179
Provides CAD Exchanger data model.
Definition: ModelData_Model.hxx:43
const ModelData_SceneGraphElement & AddRoot(const ModelData_SceneGraphElement &theElement)
Adds new root element into the scene graph.
Definition: ModelData_Model.cxx:830
Writes any format that CAD Exchanger can export.
Definition: ModelData_ModelWriter.hxx:33
Defines a leaf node in the scene graph hiearchy.
Definition: ModelData_Part.hxx:35
ModelData_BRepRepresentation BRepRepresentation() const
Definition: ModelData_Part.cxx:360
void AddRepresentation(const ModelData_Representation &theRepresentation)
Adds a representation.
Definition: ModelData_Part.cxx:341
Defines a 3D point.
Definition: ModelData_Point.hxx:295
Defines polygonal (faceted or tessellated) representation of part.
Definition: ModelData_PolyRepresentation.hxx:39
const ModelData_PolyShapeList & Get() const
Returns poly shapes comprising the representation.
Definition: ModelData_PolyRepresentation.cxx:408
List of vertex sets contained in polygonal representation.
Definition: ModelData_PolyShapeList.hxx:33
Base class for particular vertex sets - triangle sets, polyline sets, point sets.
Definition: ModelData_PolyVertexSet.hxx:31
Defines a topological solid.
Definition: ModelData_Solid.hxx:31
Defines classes, types, and global functions related to CAD Exchanger.
Definition: A3DSTestLib.hxx:22