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Costa-Dyakiw/src/jat/examples/ThreeBodyExample/ThreeBodyAPL.java
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package jat.examples.ThreeBodyExample; | |
import java.util.ArrayList; | |
import org.apache.commons.math3.geometry.euclidean.threed.Vector3D; | |
import org.apache.commons.math3.ode.FirstOrderDifferentialEquations; | |
import org.apache.commons.math3.ode.sampling.StepHandler; | |
import org.apache.commons.math3.ode.sampling.StepInterpolator; | |
import jat.coreNOSA.algorithm.integrators.Printable; | |
import jat.coreNOSA.cm.Constants; | |
import jat.coreNOSA.cm.ThreeBody; | |
import jat.coreNOSA.math.MatrixVector.data.VectorN; | |
public class ThreeBodyAPL extends ThreeBody implements FirstOrderDifferentialEquations{ | |
public ArrayList<Double> time = new ArrayList<Double>(); | |
public ArrayList<Double> xsol = new ArrayList<Double>(); | |
public ArrayList<Double> ysol = new ArrayList<Double>(); | |
public ArrayList<Double> zsol = new ArrayList<Double>(); | |
public ThreeBodyAPL(double G, double m1, double m2, double m3) { | |
super(G, m1, m2, m3); | |
} | |
@Override | |
public void computeDerivatives(double t, double[] y, double[] yDot) { | |
// returns the derivatives of the ThreeBody problem | |
yDot = this.derivs(t, y); | |
} | |
@Override | |
public int getDimension() { | |
// returns a dimension of 6 | |
return 18; | |
} | |
public double[] randv() { | |
// returns the position and velocity of the three objects | |
// vector r1 is x[0], x[1], x[2] | |
// vector v1 is x[3], x[4], x[5] | |
// vector r2 is x[6], x[7], x[8] | |
// vector v2 is x[9], x[10], x[11] | |
// vector r3 is x[12], x[13], x[14] | |
// vector v3 is x[15], x[16], x[17] | |
double[] randv = new double[18]; | |
randv[0] = 2.0; | |
randv[1] = 6.0; | |
randv[2] = 7.0; | |
randv[3] = 4.0; | |
randv[4] = 8.0; | |
randv[5] = 7.0; | |
randv[6] = 5.0; | |
randv[7] = 8.0; | |
randv[8] = 3.0; | |
randv[9] = 6.0; | |
randv[10] = 8.0; | |
randv[11] = 9.0; | |
randv[12] = 0.0; | |
randv[13] = 7.0; | |
randv[14] = 4.0; | |
randv[15] = 5.0; | |
randv[16] = 7.0; | |
randv[17] = 8.0; | |
return randv; | |
} | |
public StepHandler stepHandler = new StepHandler() { | |
public void init(double t0, double[] y0, double t) { | |
} | |
public void handleStep(StepInterpolator interpolator, boolean isLast) { | |
double t = interpolator.getCurrentTime(); | |
double[] y = interpolator.getInterpolatedState(); | |
System.out.println(t + " " + y[0] + " " + y[1]+ " " + y[2]); | |
time.add(t); | |
xsol.add(y[0]); | |
ysol.add(y[1]); | |
zsol.add(y[2]); | |
} | |
}; | |
} |