NurbsSurfaceUnitTest.cpp File Reference

#include "Nurbs/NurbsSurface.h"
#include "Walls/NurbsWall.h"
#include "Math/Helpers.h"
#include <sstream>
#include <DPMBase.h>
#include <Interactions/NormalForceInteractions/LinearViscoelasticInteraction.h>
#include <Species/LinearViscoelasticSpecies.h>

Functions
int	main ()

Function Documentation

main()

int main

(

)

{
    //define quarter circle as nurbs surface
    std::vector<double> knotsU = {0,0,0,1,1,1};
    std::vector<double> knotsV = {0,0,1,1};
    std::vector<std::vector<Vec3D>> controlPoints = {{{1,0,0},{1,0,2}},{{1,1,0},{1,1,2}},{{0,1,0},{0,1,2}}} ;
    std::vector<std::vector<Mdouble>> weights = {{1,1},{1,1},{2,2}};
    NurbsSurface nurbsSurface(knotsU,knotsV,controlPoints,weights);
 
    //output of the unit test: check if evaluation works
    Vec3D val = nurbsSurface.evaluate(0.5,0.5);
    helpers::check(val,{.6,.8,1},std::numeric_limits<double>::epsilon(),"Nurbs evaluation failed");
 
    //now demonstrate how nurbs wall can be defined:
 
    //create a basic dpm class
    DPMBase dpm;
    dpm.setName("NurbsSurfaceUnitTest");
    auto s = dpm.speciesHandler.copyAndAddObject(LinearViscoelasticSpecies());
    SphericalParticle p;
    p.setSpecies(s);
    p.setRadius(1);
    p.setPosition({1,1,.2});
    dpm.particleHandler.copyAndAddObject(p);
 
    //define nurbs wall and add to dpm class
    NurbsWall nurbsWall;
    nurbsWall.setSpecies(s);
    nurbsWall.set(nurbsSurface);
    auto w = dpm.wallHandler.copyAndAddObject(nurbsWall);
 
    //write vtk file
    dpm.wallHandler.setWriteVTK(FileType::ONE_FILE);
    dpm.forceWriteOutputFiles();
 
    //test if contact can be found
    Vec3D normal;
    double distance;
    w->getDistanceAndNormal(p,distance,normal);
    helpers::check(normal,{-sqrt(.5),-sqrt(.5),0},4*std::numeric_limits<double>::epsilon(),"Nurbs contact evaluation");
 
    return 0;
}

References helpers::check(), NurbsSurface::evaluate(), ONE_FILE, NurbsWall::set(), DPMBase::setName(), BaseInteractable::setPosition(), BaseParticle::setRadius(), BaseParticle::setSpecies(), and BaseWall::setSpecies().