/**
* force calculation on input masses
*
* @param masses - input masses to apply force to
*/
@Override
protected void envoke(List<Mass> masses) {
for (Mass mass : masses) {
double distance = getDistance(mass);
Vector force = calculateWallRepulsionForce(distance);
mass.applyAccelerationVector(force);
}
}
/**
* gets the distance between this repulsion force's wall and the input mass
*
* @param mass - mass to find the distance to
* @return dist - distance to mass
*/
public double getDistance(Mass mass) {
double dist = 0;
if (mySide == TOP_WALL) {
dist = mass.getY();
} else if (mySide == RIGHT_WALL) {
dist = mass.getX();
} else if (mySide == BOTTOM_WALL) {
dist = mass.getY() - myHeight;
} else if (mySide == LEFT_WALL) {
dist = mass.getX() - myWidth;
}
return dist;
}
@Override
public Vector getForceOnMass(Mass m) {
if (!getToggle()) return new Vector();
Vector result = new Vector(m.getVelocity());
double viscosityScale = getProperty(Keywords.SCALE);
result.setMagnitude(result.getMagnitude() * viscosityScale);
result.turn(Keywords.DEGREES_TURN_AROUND);
return result;
}
/** Convenience method. */
public double distance(Mass other) {
// this is a little awkward, so hide it
return new Location(getX(), getY()).distance(new Location(other.getX(), other.getY()));
}
public void applyVescosity(Mass m) {
Vector vescoForce = new Vector(m.getVelocity());
vescoForce.scale(myViscosity);
vescoForce.negate();
m.applyForce(vescoForce);
}
public void applyGravity(Mass m) {
Vector g = new Vector(getMyGravity());
g.scale(m.getMyMass());
m.applyForce(g);
}
public void applyRepulsionForce(Mass m, Dimension bounds) {
for (WallRepulsion wr : myWalls) {
Vector repForce = wr.getForce(m, bounds);
m.applyForce(repForce);
}
}
public void applyCenterAttraction(Mass m) {
Vector attForce = myCenter.getForce(m);
m.applyForce(attForce);
}
