SPHSolver3D/integration.cpp at main · Balvald/SPHSolver3D · GitHub

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//
//  Florian Probst
//  E-Mail: probstf@informatik.uni-freiburg.de / derbalvald@gmail.com
//

#include "integration.h"

// In these functions I assume that particles positions and velocities are still the old ones.
// but the accelerations are the new ones.

void euler(Particles &particles, double dt)
{
    particles.positions += particles.velocities * dt;
    particles.velocities += particles.accelerations * dt;
}

void implicit_euler(Particles &particles, double dt)
{
    particles.velocities += particles.accelerations * dt;
    particles.positions += particles.velocities * dt;
}

void verlet_step1(Particles &particles, double dt)
{
    particles.positions += particles.velocities * dt + 0.5 * particles.accelerations * dt * dt;
}

void verlet_step2(Particles &particles, double dt)
{
    particles.velocities += (0.5 * particles.accelerations * dt);
}

void runge_kutta_4th_order(Particles &particles, double dt)
{

}