/** Star constructor. */
public Star(double star_pos_x, double star_pos_y) {
my_physics = new PhysicsClass();
// my_animation = new Animation();
my_physics.mass(STAR_MASS);
my_physics.position_x(star_pos_x);
my_physics.position_y(star_pos_y);
}
/** @return What is your velocity in meters per second? */
public /*@ pure @*/ double[] velocity() {
return my_physics.velocity();
}
public void simulate(double time) {
my_physics.simulate(time);
}
// @ ensures \result.length == 2;
public /*@ pure @*/ double[] position() {
return my_physics.position();
}
/** @return What is your orientation in radians? */
public /*@ pure @*/ double orientation() {
return my_physics.orientation();
}
/** @return What is your momentum in kilograms*meters per second? */
public /*@ pure @*/ double momentum() {
return my_physics.momentum();
}
// @ ensures 0 <= \result;
public /*@ pure @*/ double mass() {
return my_physics.mass();
}
/** @return What is the gravitational constant? */
public /*@ pure @*/ double gravitational_constant() {
return my_physics.gravitational_constant();
}
// @ ensures \result.length == 2;
public /*@ pure @*/ double[] acceleration() {
return my_physics.acceleration();
}
