OpenCascade Law Function

/*
Copyright(C) 2018 Shing Liu(eryar@163.com)

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files(the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions :

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

#include <TColgp_Array1OfPnt2d.hxx>

#include <Law_Constant.hxx>
#include <Law_Linear.hxx>
#include <Law_BSpFunc.hxx>
#include <Law_S.hxx>
#include <Law_Interpol.hxx>

#pragma comment(lib, "TKernel.lib")
#pragma comment(lib, "TKMath.lib")

#pragma comment(lib, "TKG2d.lib")
#pragma comment(lib, "TKG3d.lib")
#pragma comment(lib, "TKGeomBase.lib")
#pragma comment(lib, "TKGeomAlgo.lib")

Standard_Integer aId = 0;

void draw(const Handle(Law_Function)& theLaw, std::ostream& theOutput)
{
    const Standard_Integer aStep = 20;

    Standard_Real aFirst = 0.0;
    Standard_Real aLast = 0.0;
    Standard_Real aDelta = 0.0;

    Standard_Real aX = 0.0;
    Standard_Real aY = 0.0;

    theLaw->Bounds(aFirst, aLast);

    aDelta = (aLast - aFirst) / aStep;

    theOutput << "polyline law" << ++aId;

    for (Standard_Integer i = 0; i <= aStep; ++i)
    {
        aX = aFirst + i * aDelta;
        aY = theLaw->Value(aX);

        theOutput  << " " << aX << " " << aY << " 0.0";
    }

    theOutput << "\n vdisplay law" << aId << std::endl;
    theOutput << "vaspects law" << aId << " -setColor " << ((aId % 2) ? " red " : " yellow ") << std::endl;
}

void test(std::ostream& theOutput)
{
    // 1. Constant law.
    Handle(Law_Constant) aConstantLaw = new Law_Constant();
    aConstantLaw->Set(2.0, 0.0, 1.0);

    draw(aConstantLaw, theOutput);

    // 2. Linear evolution law.
    Handle(Law_Linear) aLinearLaw = new Law_Linear();
    aLinearLaw->Set(1.0, 2.0, 3.0, 5.0);

    draw(aLinearLaw, theOutput);

    // 3. An "S" evolution law.
    Handle(Law_S) aSLaw = new Law_S();
    aSLaw->Set(3.0, 5.0, 6.0, 8.0);

    draw(aSLaw, theOutput);

    // 4. Provides an evolution law that interpolates a set of parameter and value pairs (wi, radi)
    TColgp_Array1OfPnt2d aPoints(1, 4);
    aPoints.SetValue(1, gp_Pnt2d(6.0, 8.0));
    aPoints.SetValue(2, gp_Pnt2d(7.0, 5.0));
    aPoints.SetValue(3, gp_Pnt2d(8.0, 9.0));
    aPoints.SetValue(4, gp_Pnt2d(9.0, 2.0));

    Handle(Law_Interpol) anInterpolativeLaw = new Law_Interpol();
    anInterpolativeLaw->Set(aPoints);

    draw(anInterpolativeLaw, theOutput);
}

int main(int argc, char* argv[])
{
    std::ofstream aTclFile("d:/tcl/law.tcl");

    test(aTclFile);

    return 0;
}