Thread: Game hitboxes

I'm making a little game in java to learn, and I encounter a problem with my weapon hitbox, I tried a lot of things but the hitbox is never applied exactly where the weapon is.
The sword is correctly displayed, I tried to draw the hitbox but it didn't match with the real hitbox. Here is my code below:

I have a weapon class that will handle all other weapons in my game but for now I just have a sword class that is used. My problem is the interaction between monsters and weapon to apply damage to the monster. There is a problem with the hitbox that is not where the sword is displayed (which it is correctly displayed). When I try to drawRect the collision box, it does not appear. In reality I do not understand well how I can make my collision box that corresponds to the translation and rotation of the image of my sword.

package weapon;
 
import entity.Entity;
import main.GamePanel;
import java.awt.*;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
 
public abstract class Weapon {
 
protected GamePanel gp;
public boolean isAttacking = false;
public boolean collisionOn = false;
 
//animations
protected boolean isDrawing = false;
protected BufferedImage[] frames;
protected int currentFrame = 0;
protected int counterFrames = 0;
protected BufferedImage[] framesEffect;
 
//angles
public double angle = 0;
protected double initialAngle = 0;
protected double startAngle;
protected double turn = Math.PI;
 
//characteristics
public int distanceFromPlayer = 50;
protected int speed = 5;
protected int damage;
public Rectangle solidArea;
public int solidAreaDefaultX, solidAreaDefaultY;
 
public Weapon(GamePanel gp, int damage) {
this.gp = gp;
this.damage = damage;
 
solidArea = new Rectangle();
solidArea.x = 0;
solidArea.y = 0;
solidAreaDefaultX = solidArea.x;
solidAreaDefaultY = solidArea.y;
solidArea.width = gp.tileSize - 2*solidArea.x;
solidArea.height = gp.tileSize - solidArea.y;
 
getImage();
getEffect();
}
 
 
protected abstract void getImage();
protected abstract void getEffect();
 
public void startAttack(String direction) {
if (!isDrawing) {
isDrawing = true;
 
startAngle = switch (direction) {
case "up" -> Math.toRadians(180) + initialAngle;
case "down" -> initialAngle;
case "left" -> Math.toRadians(90) + initialAngle;
case "right" -> Math.toRadians(-90) + initialAngle;
default -> initialAngle;
};
angle = startAngle;
}
}
 
public void update() {
if (isDrawing) {
angle += Math.toRadians(speed);
if (angle - startAngle >= turn) {
isDrawing = false;
}
counterFrames++;
if (counterFrames > 5) {
currentFrame = (currentFrame + 1) % frames.length;
counterFrames = 0;
}
 
int weaponHitboxX = gp.playerCenterX + (int) (distanceFromPlayer * Math.cos(angle) + gp.tileSize);
int weaponHitboxY = gp.playerCenterY + (int) (distanceFromPlayer * Math.sin(angle)) + gp.tileSize / 2;
 
solidArea.x = weaponHitboxX;
solidArea.y = weaponHitboxY;
 
int monsterIndex = checkEntityWithWeapon(this, gp.mon);
if (monsterIndex != 999) {
damageMonster(monsterIndex);
}
 
 
}
}
 
public void draw(Graphics2D g2, int playerCenterX, int playerCenterY) {
if (isDrawing) {
int weaponX = playerCenterX + (int) (distanceFromPlayer * Math.cos(angle) + gp.tileSize);
int weaponY = playerCenterY + (int) (distanceFromPlayer * Math.sin(angle)) + gp.tileSize/2;
 
AffineTransform originalTransform = g2.getTransform();
AffineTransform weaponTransform = new AffineTransform();
weaponTransform.translate(weaponX, weaponY);
weaponTransform.rotate(angle + Math.PI / 2, gp.tileSize / 2, gp.tileSize / 2);
g2.setTransform(weaponTransform);
 
if (frames[currentFrame] != null) {
 
g2.drawImage(frames[currentFrame], 0, 0, gp.tileSize, gp.tileSize, null);}
 
g2.setTransform(originalTransform);
}
}
 
public int checkEntityWithWeapon(Weapon weapon, Entity[] target) {
int index = 999;
for (int i = 0; i < target.length; i++) {
if (target[i] != null) {
 
target[i].solidArea.x = target[i].worldX + target[i].solidArea.x;
target[i].solidArea.y = target[i].worldY + target[i].solidArea.y;
 
if (weapon.solidArea.intersects(target[i].solidArea)) { // intersects vérifie si 2 rectangles sont en collision
collisionOn = true;
index = i;
}
 
target[i].solidArea.x = target[i].solidAreaDefaultX;
target[i].solidArea.y = target[i].solidAreaDefaultY;
}
}
return index;
}
 
 
 
public boolean isDrawing() {
return isDrawing;
}
 
public int getWeaponTipY(int playerCenterY) {
return playerCenterY + (int) (distanceFromPlayer * Math.sin(angle));
}
 
public void damageMonster(int i){
if(i != 999) {
 
if (gp.mon[i].invincible == false) {
gp.mon[i].life -= 1;
gp.mon[i].invincible = true;
 
if(gp.mon[i].life <= 0){
gp.mon[i] = null;
}
}
}
}
}

 
package weapon;
 
import main.GamePanel;
import main.UtilityTool;
import java.awt.image.BufferedImage;
 
public class Sword extends Weapon {
 
    public Sword(GamePanel gp) {
        super(gp, 10); 
 
        solidArea.x = 24;
        solidArea.y = 0;
        solidAreaDefaultX = solidArea.x;
        solidAreaDefaultY = solidArea.y;
        solidArea.width = gp.tileSize - 2*solidArea.x;
        solidArea.height = gp.tileSize - solidArea.y;
 
        initialAngle = Math.toRadians(22.5);
        turn = Math.toRadians(135);
    }
 
    @Override
    protected void getImage() {
        BufferedImage swordSpriteSheet = UtilityTool.setup("/resources/weapons/sword2", 1, gp.tileSize);
        this.frames = UtilityTool.extractFrames(swordSpriteSheet, 1, gp.tileSize);
    }
 
// ------------------------------not used for now------------------
    protected void getEffect() {
        BufferedImage swordSpriteSheet = UtilityTool.setup("/resources/effects/slash1", 4, gp.tileSize);
        this.framesEffect = UtilityTool.extractFrames(swordSpriteSheet, 4, gp.tileSize);
    }
}

the hitbox is never applied exactly where the weapon is.

Please explain in more detail.

Please edit your post and wrap your code with code tags:

[code]
**YOUR CODE GOES HERE**
[/code]

to get highlighting and preserve formatting.

How can someone execute your code for testing? I do not see a main() method for starting its execution.

How can I compile the code and execute it for testing? It does not have a main method.
Can you make and post minimum code for testing?