ObjectBase.java

public abstract class ObjectBase {
    protected Multimap<ParticleEffect, Vector4d> set_v = ArrayListMultimap.create();

    public void render(Viewer viewer, Matrix4d... matrices) {
        for(Map.Entry<ParticleEffect, Vector4d> entry : set_v.entries()) {
            Vector4d transformed = entry.getValue();

            for(Matrix4d m : matrices) {
                transformed = m.transform(transformed);
            }

            viewer.spawnParticles(entry.getKey(), transformed.toVector3());
        }
    };
}

ParametricEquation.java

class ParametricEquation extends ObjectBase {
    private int counter;

    private ParametricEquation(ParticleEffect effect, Function<Double, Vector3d> function, double interval) {

        double increment = 16;

        for (double i = 0d; i <= TrigMath.TWO_PI * interval; i += TrigMath.TWO_PI / increment) {
            Vector4d current = function.apply(i).toVector4(1);

            set_v.put(effect, current);
        }
    }
}