Class Jumper

java.lang.Object

core.GameObject

core.Character

entities.enemies.Enemy

entities.enemies.Jumper

All Implemented Interfaces:

Hittable

public class Jumper
extends Enemy

Represents a Jumper enemy. The Jumper randomly jumps within a radius around its current position, and shoots four bullets in four directions after each jump.

Field Summary

Fields

Modifier and Type	Field	Description
private static final javafx.scene.image.Image	JUMPER_SPRITE	Sprite used to render the Jumper.
private boolean	jumping	Flag indicating whether the Jumper is currently jumping.
private double	jumpRadius	Maximum jump distance from current position.
private double	targetX	Target X coordinate for the current jump.
private double	targetY	Target Y coordinate for the current jump.

Fields inherited from class entities.enemies.Enemy

room

Fields inherited from class core.Character

diameter, isAlive

Fields inherited from class core.GameObject

x, y

Constructor Summary

Constructors

Constructor	Description
Jumper(double x, double y, Room room, int hp, int power, double diameter)	Constructs a new Jumper enemy.

Method Summary

Modifier and Type	Method	Description
private void	loopBehavior()	Main AI loop running in a separate thread.
private void	pickRandomTarget()	Picks a random target position within the jump radius.
void	render(javafx.scene.canvas.GraphicsContext gc)	Renders the Jumper, including its sprite and damage flash.
private void	shoot4Directions()	Shoots bullets in four cardinal directions (up, down, left, right).
private void	smoothMove(double durationSeconds)	Smoothly moves the Jumper toward the target position over a specified duration.
void	update(double dt)	Updates the Jumper each frame.

Methods inherited from class entities.enemies.Enemy

getDamageFlash, getRoom, isAlive, isDead, onDead, onHit, setDamageFlash, setRoom

Methods inherited from class core.Character

getDiameter, getHitbox, getHp, getMaxHp, getPower, setAlive, setDiameter, setHp, setMaxHp, setPower

Methods inherited from class core.GameObject

getX, getY, setX, setY

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface core.Hittable

getDiameter, getHitbox

Field Details

targetX

private double targetX

Target X coordinate for the current jump.

targetY

private double targetY

Target Y coordinate for the current jump.

jumping

private volatile boolean jumping

Flag indicating whether the Jumper is currently jumping. Volatile ensures every thread see the change

jumpRadius

private double jumpRadius

Maximum jump distance from current position.

JUMPER_SPRITE

private static final javafx.scene.image.Image JUMPER_SPRITE

Sprite used to render the Jumper.

Constructor Details

Jumper

public Jumper(double x,
 double y,
 Room room,
 int hp,
 int power,
 double diameter)

Constructs a new Jumper enemy.

Parameters:

x - Initial X position.

y - Initial Y position.

room - Room where the enemy resides.

hp - Health points of the Jumper.

power - Attack power of the Jumper.

diameter - Diameter for hitbox and rendering.

Method Details

loopBehavior

private void loopBehavior()

Main AI loop running in a separate thread. Handles waiting, jumping, and shooting behavior.

pickRandomTarget

private void pickRandomTarget()

Picks a random target position within the jump radius. Ensures the target remains inside room bounds.

smoothMove

private void smoothMove(double durationSeconds)
                 throws InterruptedException

Smoothly moves the Jumper toward the target position over a specified duration.

Parameters:

durationSeconds - Duration of the movement in seconds.

Throws:

InterruptedException - If the thread is interrupted.

shoot4Directions

private void shoot4Directions()

Shoots bullets in four cardinal directions (up, down, left, right).

update

public void update(double dt)

Updates the Jumper each frame. Handles damage flash animation.

Specified by:

update in class Enemy

Parameters:

dt - Delta time since last update (seconds).

render

public void render(javafx.scene.canvas.GraphicsContext gc)

Renders the Jumper, including its sprite and damage flash.

Specified by:

render in class Enemy

Parameters:

gc - GraphicsContext used for rendering.