DrivenParticleUnitTest.cpp

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//Copyright (c) 2013-2014, The MercuryDPM Developers Team. All rights reserved.
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#include <math.h>

#include "DPMBase.h"
#include "Particles/BaseParticle.h"
#include "Species/LinearViscoelasticSpecies.h"
#include "Math/ExtendedMath.h"

class DrivenParticleClass : public DPMBase
{
public:
    void setupInitialConditions()
    {
        speciesHandler.copyAndAddObject(LinearViscoelasticSpecies());
        
        BaseParticle p0;
        //At the moment, it is still necessary to fix the particle before we can
        //move it manually.
        p0.fixParticle();
        p0.setPrescribedPosition([](double time)
        {
            return(Vec3D(cos(time), 
                         0.0, 
                         sin(time)));
        });
        particleHandler.copyAndAddObject(p0);
        
        setTimeStep(0.01);
        setTimeMax(2 * constants::pi);
        
        setXMax(1.0);
        setYMax(1.0);
        setZMax(1.0);
    }
    
    void actionsAfterTimeStep()
    {
        Vec3D pos = particleHandler.getObject(0)->getPosition();
        //check if the particle is still on the unit circle in the (x,z)-plane
        if (std::abs(pos.getLength() - 1) > 1e-6 )
            logger(FATAL, "The particle is not on the unit circle anymore!");
        if (std::abs(pos.X) - 1 > 1e-6)
            logger(FATAL, "The particle exceeded the bounds in x direction");
        if (std::abs(pos.Y) > 1e-6)
            logger(FATAL, "The particle exceeded the bounds in y direction");        
        if (std::abs(pos.Z) - 1 > 1e-6 )
            logger(FATAL, "The particle exceeded the bounds in z direction");
        //check if any of the entries in pos equals nan or -nan
        if (pos.X != pos.X || pos.Y != pos.Y || pos.Z != pos.Z)
            logger(FATAL, "The position of the particle contains an entry that is not a number.");
    }
};

int main(int argc, char *argv[])
{
    // Problem setup
    DrivenParticleClass problem;
    problem.setName("DrivenParticleUnitTest");
    problem.setFileType(FileType::NO_FILE);
    problem.solve();
    
    return 0;
}