Function Plotter Template for VRL-Studio

FunctionPlotter.groovy

package eu.mihosoft.vrl.user;

/**
 * Function Plotter 
 */
@ComponentInfo(name="FunctionPlotter", category="ODE")
public class FunctionPlotter implements java.io.Serializable {
  private static final long serialVersionUID=1L;

  public Trajectory run(
                    @ParamInfo(name="f(t)")
                    Function1D f,
                    @ParamInfo(name="t0", options="value=0.0D")
                    double t0,
                    @ParamInfo(name="tn", options="value=10.0D")
                    double tn,
                    @ParamInfo(name="h", options="value=1e-2D")
                    double h,
                    @ParamInfo(name="Label", options="value=\"Function Plotter\"")
                    String label){

     // create new (and empty) trajectory
     Trajectory trajectory = new Trajectory(label);

     // check if time interval is correctly chosen by user
     if(t0 > tn){
       throw new IllegalArgumentException("t0 > tn is not allowed.");
       // throw new RuntimeException("Error Text");
     }
 
     // add first (i.e. start) timepoint to the trajectory
     trajectory.add(t0, f.run(t0));

     // TODO add your code here

    
     return trajectory;
  }

}

UserFunction.groovy

package eu.mihosoft.vrl.user;
import eu.mihosoft.vrl.math.*;

@ComponentInfo(name = "User Function", category = "ODE",
        description="Evaluates expressions (e.g. u*cos(t))")
@ObjectInfo(name = "User Function")
public class UserFunction implements Serializable {

    private static final long serialVersionUID = 1L;
  
    public Function2D getFunction2D(
            @ParamInfo(name = "f(t,u) = ",
            options = "xVarName=\"t\";yVarName=\"u\"") GroovyFunction2D f) {

        return f;
    }

    public Function1D getFunction1D(
            @ParamInfo(name = "f(t) = ",
            options = "xVarName=\"t\";") GroovyFunction1D f) {

        return f;
    }
  }