added projectile system and sample fireball projectile

src/de/miaurizius/jgame2d/entity/Entity.java

@@ -5,6 +5,7 @@ import de.miaurizius.jgame2d.core.enums.Direction;
 import de.miaurizius.jgame2d.core.GamePanel;
 import de.miaurizius.jgame2d.core.Utility;
 import de.miaurizius.jgame2d.core.enums.EntityType;
+import de.miaurizius.jgame2d.entity.projectile.Projectile;
 
 import javax.imageio.ImageIO;
 import java.awt.*;
@@ -59,14 +60,18 @@ public class Entity {
     public int exp;
     public int nextLevelExp;
     public int coins;
+    public int maxMana;
+    public int mana;
     public Entity currentWeapon;
     public Entity currentShield;
+    public Projectile projectile;
 
     // ITEM ATTRIBUTES
     public EntityType.WeaponType weaponType;
     public int attackValue;
     public int defenseValue;
     public String description;
+    public int useCost;
 
     public Entity(GamePanel panel) {
         this.panel = panel;
@@ -187,7 +192,6 @@ public class Entity {
         if(dyingCount > incr*6 && dyingCount <= incr*7) changeOpacity(graphics2d, 0f);
         if(dyingCount > incr*7 && dyingCount <= incr*8) changeOpacity(graphics2d, 1f);
         if(dyingCount > incr*8) {
-            dying = false;
             alive = false;
         }
     }

src/de/miaurizius/jgame2d/entity/Player.java

@@ -7,6 +7,7 @@ import de.miaurizius.jgame2d.core.enums.GameState;
 import de.miaurizius.jgame2d.core.handlers.KeyHandler;
 import de.miaurizius.jgame2d.entity.item.ShieldWoodObj;
 import de.miaurizius.jgame2d.entity.item.SwordNormalObj;
+import de.miaurizius.jgame2d.entity.projectile.FireballObj;
 
 import java.awt.*;
 import java.util.ArrayList;
@@ -106,6 +107,12 @@ public class Player extends Entity {
             }
         }
 
+        if(panel.keyH.shotKeyPressed && !projectile.alive) {
+            projectile.set(worldX, worldY, direction, true, this);
+            panel.projectileList.add(projectile);
+            panel.playSE(10);
+        }
+
         // INVINCIBLE COUNTER
         if(!invincible) return;
         invincibleCount++;
@@ -130,8 +137,7 @@ public class Player extends Entity {
 
     public void interactMonster(int index) {
         if(index == 999) return;
-        if(invincible) return;
-        if(panel.monster[index].dying || !panel.monster[index].alive) return;
+        if(invincible || panel.monster[index].dying || !panel.monster[index].alive) return;
 
         int damage = panel.monster[index].attack - defense;
 
@@ -163,7 +169,7 @@ public class Player extends Entity {
             solidArea.height = attackArea.height;
 
             int monsterIndex = panel.collisionH.checkEntity(this, panel.monster);
-            damageMonster(monsterIndex);
+            damageMonster(monsterIndex, attack);
 
             worldX = currentWorldX;
             worldY = currentWorldY;
@@ -177,7 +183,7 @@ public class Player extends Entity {
             attacking = false;
         }
     }
-    public void damageMonster(int index) {
+    public void damageMonster(int index, int attack) {
         if(index == 999) return;
         if(panel.monster[index].invincible) return;
 
@@ -262,6 +268,7 @@ public class Player extends Entity {
         coins = 0;
         currentWeapon = new SwordNormalObj(panel);
         currentShield = new ShieldWoodObj(panel);
+        projectile = new FireballObj(panel);
         attack = getAttack();
         defense = getDefense();
 

src/de/miaurizius/jgame2d/entity/projectile/FireballObj.java

@@ -0,0 +1,35 @@
+package de.miaurizius.jgame2d.entity.projectile;
+
+import de.miaurizius.jgame2d.core.GamePanel;
+import de.miaurizius.jgame2d.core.enums.EntityType;
+
+public class FireballObj extends Projectile {
+
+    GamePanel panel;
+
+    public FireballObj(GamePanel panel) {
+        super(panel);
+        this.panel = panel;
+
+        name  = "Fireball";
+        type =  EntityType.PROJECTILE;
+
+        speed = 5;
+        maxLife = 80;
+        life = maxLife;
+        attack = 2;
+        useCost = 1;
+        alive = false;
+
+        // INITIALISATION OF IMAGES
+        up1 = initEntitySprites("/projectile/fireball_up_1");
+        up2 = initEntitySprites("/projectile/fireball_up_2");
+        down1 = initEntitySprites("/projectile/fireball_down_1");
+        down2 = initEntitySprites("/projectile/fireball_down_2");
+        left1 = initEntitySprites("/projectile/fireball_left_1");
+        left2 = initEntitySprites("/projectile/fireball_left_2");
+        right1 = initEntitySprites("/projectile/fireball_right_1");
+        right2 = initEntitySprites("/projectile/fireball_right_2");
+    }
+
+}

src/de/miaurizius/jgame2d/entity/projectile/Projectile.java

@@ -0,0 +1,61 @@
+package de.miaurizius.jgame2d.entity.projectile;
+
+import de.miaurizius.jgame2d.core.GamePanel;
+import de.miaurizius.jgame2d.core.enums.Direction;
+import de.miaurizius.jgame2d.core.enums.EntityType;
+import de.miaurizius.jgame2d.entity.Entity;
+
+public class Projectile extends Entity {
+
+    Entity user;
+
+    public Projectile(GamePanel panel) {
+        super(panel);
+    }
+
+    public void set(int worldX, int worldY, Direction direction, boolean alive, Entity user) {
+        this.worldX = worldX;
+        this.worldY = worldY;
+        this.direction = direction;
+        this.alive = alive;
+        this.user = user;
+        this.life = maxLife;
+    }
+
+    public void update() {
+
+        if(user.type == EntityType.PLAYER) {
+            int monsterIndex = panel.collisionH.checkEntity(this, panel.monster);
+            if(monsterIndex != 999) {
+                panel.player.damageMonster(monsterIndex, attack);
+                alive = false;
+            }
+        }
+
+        if(user.type == EntityType.MONSTER) {
+
+        }
+
+        switch(direction) {
+            case UP -> worldY -= speed;
+            case DOWN -> worldY += speed;
+            case LEFT -> worldX -= speed;
+            case RIGHT -> worldX += speed;
+        }
+
+        life--;
+        if(life <= 0) {
+            alive = false;
+            return;
+        }
+
+        spriteCounter++;
+        if(spriteCounter > 12) {
+            if(spriteNum == 1) spriteNum = 2;
+            else if(spriteNum == 2) spriteNum = 1;
+            else spriteNum = 0;
+            spriteCounter = 0;
+        }
+    }
+
+}