public void tick() {
super.tick(); // ticks the Entity.java part of this class
if (level.player != null
&& randomWalkTime
== 0) { // checks if player is on zombies level and if there is no time left on timer
int xd = level.player.x - x; // gets the horizontal distance between the zombie and the player
int yd = level.player.y - y; // gets the vertical distance between the zombie and the player
if (xd * xd + yd * yd < 50 * 50) { // more evil distance checker code
xa = 0; // sets direction to nothing
ya = 0;
if (xd < 0)
xa =
-1; // if the horizontal difference is smaller than 0, then the x acceleration will be
// 1 (negative direction)
if (xd > 0)
xa =
+1; // if the horizontal difference is larger than 0, then the x acceleration will be
// 1
if (yd < 0)
ya =
-1; // if the vertical difference is smaller than 0, then the y acceleration will be 1
// (negative direction)
if (yd > 0)
ya = +1; // if the vertical difference is larger than 0, then the y acceleration will be 1
}
}
// halp david! I have no idea what the & sign does in maths! Unless it's a bit opereator, in
// which case I'm rusty
// Calm down, go google "java bitwise AND operator" for information about this. -David
int speed = tickTime & 1; // Speed is either 0 or 1 depending on the tickTime
if (!move(xa * speed, ya * speed)
|| random.nextInt(200)
== 0) { // moves the zombie, doubles as a check to see if it's still moving -OR- random
// chance out of 200
randomWalkTime = 60; // sets the not-so-random walk time to 60
xa =
(random.nextInt(3) - 1)
* random.nextInt(2); // sets the acceleration to random i.e. idling code
ya =
(random.nextInt(3) - 1)
* random.nextInt(2); // sets the acceleration to random i.e. idling code
}
if (randomWalkTime > 0) randomWalkTime--; // if walk time is larger than 0, decrement!
}
