private double distanceTo(Actor opponent) {
double actorToMoveX = opponent.getAvatar().getTranslateX();
double actorToMoveY = opponent.getAvatar().getTranslateY();
double currentX = getAvatar().getTranslateX();
double currentY = getAvatar().getTranslateY();
double deltaX = actorToMoveX - currentX;
double deltaY = actorToMoveY - currentY;
double calculatedDistance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
return calculatedDistance;
}
/**
* processes a single round of combat between two Actor objects: the <b>attacker</b> is this
* object; the <b>defender</b> is received as an argument. This method is called by the
* <b>attacker</b> <i>Actor</i> object. This <b>attacker</b> <i>Actor</i> object chooses another
* <i>Actor</i> object as the <b>defender</b> by sending a reference-to the second <i>Actor</i>
* object. When program execution arrives in <i>combatRound</i>, the method will have access to 2
* sets of <i>Actor</i> attributes (a.k.a. instance fields). In particular, this method will need
* to use <i>health</i> and <i>strength</i> to process a single round of combat. As an outcome of
* the single round, both <i>Actor</i> objects: the <b>attacker</b> and the <b>defender</b> are
* likely to loose some <i>health</i> value, but the <i>Actor</i> object with less <i>strength</i>
* will likely incur more damage to their <i>health</i>. You access the <b>attacker</b> instance
* fields (such as <i>health</i> using <i>this.health</i> and the <b>defender</b> instance fields
* using <i>defender.health</i>. Of course, <i>defender</i> is the name of the stack-oriented
* reference-to variable that is sent to the method.
*
* @param defender a reference to a different <i>Actor</i> object that will engage in combat with
* this <i>Actor</i> object.
* @return <i>health</i> of the <i>Actor</i> following the combat round.
*/
public double combatRound(Actor defender) {
final double MAX_COMBAT_HEALTH_REDUCTION_OF_LOOSER =
10.0; // health ranges 0.0 to 100.0, thus could loose 0.0 to 10.0
final double MAX_COMBAT_HEALTH_REDUCTION_OF_WINNER = 3.0; // could loose 0.0 to 3.0
double healthAdjustmentOfLooser =
-(Math.random() * MAX_COMBAT_HEALTH_REDUCTION_OF_LOOSER)
- 1.0; // looser looses at least 1.0
double healthAdjustmentOfWinner =
-(Math.random() * MAX_COMBAT_HEALTH_REDUCTION_OF_WINNER) + 1.0; // winner gains at least 1.0
double proportionHitPoints =
getHitPoints() / (getHitPoints() + defender.getHitPoints()); // between 0.0 and 1.0
if (Math.random() > proportionHitPoints) {
adjustHealth(healthAdjustmentOfLooser);
defender.adjustHealth(healthAdjustmentOfWinner);
} else {
defender.adjustHealth(healthAdjustmentOfLooser);
adjustHealth(healthAdjustmentOfWinner);
}
return getHealth();
} // end combatRound()
public double getHitPoints() {
return getStrength() + getHealth() * .5 * Math.random();
}
/**
* <i>Actor</i> regain health on each cycle of the simulation (and loose health in battles handled
* by other code).
*/
public void gameCycleHealthGain() {
final double MAX_CYCLE_HEALTH_GAIN = 2.0;
adjustHealth(Math.random() * MAX_CYCLE_HEALTH_GAIN);
}