/**
* Calculates a vertical value for a quadratic function using Lagrange's from of the interpolation
* polynomial The formula takes a flipped Y axis in consideration
*
* @param x the horizontal coordinate
* @return a new value for Y
*/
private double calcY(double x) {
double x0 = startPoint.getX();
double x1 = midPoint.getX();
double x2 = endPoint.getX();
double l0 = ((x - x1) * (x - x2)) / ((x0 - x1) * (x0 - x2));
double l1 = ((x - x0) * (x - x2)) / ((x1 - x0) * (x1 - x2));
double l2 = ((x - x0) * (x - x1)) / ((x2 - x0) * (x2 - x1));
return startPoint.getY() * l0 + midPoint.getY() * l1 + endPoint.getY() * l2;
}
@Override
public void fire(
final Position shipPosition,
final PlayerID playerId,
final Rotation rotation,
final float timeElapsed) {
cooldown = cooldown - timeElapsed;
if (cooldown < 0) {
cooldown = cooldown + INIT_COOLDOWN;
this.getBulletManager()
.addBullet(
new BasicBullet(
shipPosition.getX(),
shipPosition.getY(),
BULLET_WIDTH,
BULLET_HEIGHT,
playerId,
new Rotation(rotation.getAngle() + currentAngle),
BULLET_DAMAGE));
currentAngle = currentAngle + ANGLE_STEP;
}
}