slime runs away when it gets hit

src/de/miaurizius/jgame2d/core/GamePanel.java

@@ -17,10 +17,8 @@ public class GamePanel extends JPanel implements Runnable {
     // SCREEN SETTINGS
     final int originalTileSize = 16; //16x16 tile
     final int scale = 3;
-
-    public final int tileSize = originalTileSize * scale; //48x48 tile
-    // 4:3 ratio
     public final int maxScreenCol = 16;
+    public final int tileSize = originalTileSize * scale; //48x48 tile
     public final int maxScreenRow = 12;
     public final int screenWidth = tileSize * maxScreenCol; // 768 pixels
     public final int screenHeight = tileSize * maxScreenRow; // 576 pixels
@@ -36,12 +34,12 @@ public class GamePanel extends JPanel implements Runnable {
     // SYSTEM
     public TileManager tileM = new TileManager(this);
     public KeyHandler keyH = new KeyHandler(this);
-    Sound se = new Sound();
-    Sound music = new Sound();
     public CollisionHandler collisionH = new CollisionHandler(this);
     public AssetSetter assetSetter = new AssetSetter(this);
     public UI ui = new UI(this);
     public EventHandler eventH = new EventHandler(this);
+    Sound se = new Sound();
+    Sound music = new Sound();
     Thread gameThread;
 
     // ENTITY AND OBJECT
@@ -63,7 +61,6 @@ public class GamePanel extends JPanel implements Runnable {
     }
 
     // GAME THREAD / CORE
-
     public void startGameThread() {
         gameThread = new Thread(this);
         gameThread.start();
@@ -103,7 +100,13 @@ public class GamePanel extends JPanel implements Runnable {
             case PLAY:
                 player.update();
                 for(Entity entity : npc) if(entity != null) entity.update();
-                for(Entity entity : monster) if(entity != null) entity.update();
+                for(int i = 0; i < monster.length; i++) {
+                    Entity m = monster[i];
+                    if(m != null) {
+                        if(m.alive && !m.dying) m.update();
+                        if(!m.alive) monster[i] = null;
+                    }
+                }
                 break;
             case PAUSE:
                 break;

src/de/miaurizius/jgame2d/core/UI.java

@@ -14,7 +14,7 @@ public class UI {
     Font arial_40, arial_80B; //TODO: Custom font loader: https://www.youtube.com/watch?v=g-wrebFVP3E
     BufferedImage heart_full, heart_half, heart_blank;
     public String currentDialogue;
-    public int commandNum = 0;
+    public int commandNum;
 
     public UI(GamePanel panel) {
         this.panel = panel;

src/de/miaurizius/jgame2d/core/handlers/Sound.java

@@ -24,6 +24,7 @@ public class Sound {
             soundURL[4] = new File("assets/sounds/fanfare.wav").toURI().toURL();
             soundURL[5] = new File("assets/sounds/hitmonster.wav").toURI().toURL();
             soundURL[6] = new File("assets/sounds/receivedamage.wav").toURI().toURL();
+            soundURL[7] = new File("assets/sounds/blocked.wav").toURI().toURL();
         } catch(MalformedURLException e) {
             Boot.logger.log(Level.SEVERE, e.getMessage());
         }

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

@@ -15,29 +15,34 @@ import java.util.logging.Level;
 
 public class Entity {
 
-    GamePanel panel;
+    protected GamePanel panel;
     public BufferedImage up1, up2, down1, down2, left1, left2, right1, right2;
     public BufferedImage attackUp1, attackUp2, attackDown1, attackDown2, attackLeft1, attackLeft2, attackRight1, attackRight2;
     public BufferedImage image, image2, image3;
     public Rectangle solidArea = new Rectangle(0, 0, 48, 48);
     public Rectangle attackArea = new Rectangle(0, 0, 0, 0);
     public int solidAreaDefaultX,  solidAreaDefaultY;
-    public boolean collision = false;
+    public boolean collision;
     String[] dialogue = new String[20];
 
     // STATE
     public int worldX, worldY;
     public Direction direction = Direction.DOWN;
     public int spriteNum = 1;
-    int dialogueIndex = 0;
-    public boolean collisionOn = false;
-    public boolean invincible = false;
-    boolean attacking = false; //TODO: https://youtu.be/HL39xRzPpm4?t=551
+    int dialogueIndex;
+    public boolean collisionOn;
+    public boolean invincible;
+    boolean attacking;
+    public boolean alive = true;
+    public boolean dying;
+    public boolean hpBarOn;
 
     // COUNTER
-    public int spriteCounter = 0;
-    public int actionLock = 0;
-    public int invincibleCount = 0;
+    public int spriteCounter;
+    public int actionLock;
+    public int invincibleCount;
+    int dyingCount;
+    int hpBarCounter;
 
     // ATTRIBUTES
     public EntityType type;
@@ -62,6 +67,7 @@ public class Entity {
 
         if(this.type == EntityType.MONSTER && contactPlayer) {
             if(panel.player.invincible) return;
+            panel.playSE(6);
             panel.player.life -= 1;
             panel.player.invincible = true;
         }
@@ -100,23 +106,43 @@ public class Entity {
                 worldY + panel.tileSize > panel.player.worldY - panel.player.screenY &&
                 worldY - panel.tileSize < panel.player.worldY + panel.player.screenY
         ) {
-            if(invincible) {
-                graphics2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.4f));
+
+            // MONSTER HP-BAR
+            if(this.type == EntityType.MONSTER && hpBarOn) {
+                graphics2d.setColor(new Color(35, 35, 35));
+                graphics2d.fillRect(screenX-1, screenY-6, panel.tileSize+2, 12);
+
+                graphics2d.setColor(new Color(255, 0, 30));
+                graphics2d.fillRect(screenX, screenY-5, (int) ((double) panel.tileSize/maxLife)*life, 10);
+
+                hpBarCounter++;
+                if(hpBarCounter > 600) { //bar disappears after 10 seconds
+                    hpBarCounter = 0;
+                    hpBarOn = false;
+                }
             }
 
-            // only modify sprite render position for player because I dont know yet how monster attack sprite are gonna look
-            if(type == EntityType.PLAYER) {
+            // DRAW ENTITY
+            if(invincible) {
+                hpBarOn = true;
+                hpBarCounter = 0;
+                changeOpacity(graphics2d, 0.4f);
+            }
+            if(dying) dyingAnimation(graphics2d);
+            if(type == EntityType.PLAYER) { // only modify sprite render position for player because I dont know yet how monster attack sprite are gonna look
                 if(attacking) graphics2d.drawImage(parseSpriteATK(),
                         (direction == Direction.LEFT) ? screenX - panel.tileSize : screenX,
                         (direction == Direction.UP) ? screenY - panel.tileSize : screenY, null);
                 else graphics2d.drawImage(parseSprite(), screenX, screenY, null);
             } else graphics2d.drawImage(parseSprite(), screenX, screenY, null);
 
-            graphics2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1f));
+            changeOpacity(graphics2d, 1f);
         }
     }
 
     // INTERACTION
+    public void setAction() {}
+    public void damageReaction() {};
     public void speak() {
         if(dialogue[dialogueIndex] == null) dialogueIndex = 0;
         panel.ui.currentDialogue = dialogue[dialogueIndex];
@@ -129,7 +155,22 @@ public class Entity {
             case RIGHT -> direction = Direction.LEFT;
         }
     }
-    public void setAction() {}
+    public void dyingAnimation(Graphics2D graphics2d) {
+        dyingCount++;
+        int incr = 5;
+        if(dyingCount <= incr) changeOpacity(graphics2d, 0f);
+        if(dyingCount > incr && dyingCount <= incr*2) changeOpacity(graphics2d, 1f);
+        if(dyingCount > incr*2 && dyingCount <= incr*3) changeOpacity(graphics2d, 0f);
+        if(dyingCount > incr*3 && dyingCount <= incr*4) changeOpacity(graphics2d, 1f);
+        if(dyingCount > incr*4 && dyingCount <= incr*5) changeOpacity(graphics2d, 0f);
+        if(dyingCount > incr*5 && dyingCount <= incr*6) changeOpacity(graphics2d, 1f);
+        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;
+        }
+    }
 
     // SETTING THINGS UP
     BufferedImage parseSprite() {
@@ -164,5 +205,8 @@ public class Entity {
         }
         return null;
     }
+    public void changeOpacity(Graphics2D graphics2d, float opacity) {
+        graphics2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, opacity));
+    }
 
 }

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

@@ -11,7 +11,6 @@ import java.awt.*;
 public class Player extends Entity {
 
     KeyHandler keyH;
-
     public final int screenX;
     public final int screenY;
 
@@ -156,12 +155,16 @@ public class Player extends Entity {
         panel.monster[index].life -= 1;
         panel.playSE(5);
         panel.monster[index].invincible = true;
-        if(panel.monster[index].life <= 0) panel.monster[index] = null;
+        panel.monster[index].damageReaction();
+        if(panel.monster[index].life <= 0) panel.monster[index].dying = true;
     }
 
     public void interactNPC(int index) {
         if(index == 999) {
-            if(panel.keyH.spacePressed) attacking = true;
+            if(panel.keyH.spacePressed) {
+                attacking = true;
+                //panel.playSE(7); //remains disabled because game does weird things while playing the sound
+            }
             return;
         }
         //if(!panel.keyH.spacePressed) return; //Only uncomment if text should only appear if player hits space

src/de/miaurizius/jgame2d/entity/monster/GreenSlimeMON.java

@@ -39,6 +39,10 @@ public class GreenSlimeMON extends Entity {
         if(i > 75) direction = Direction.RIGHT;
         actionLock = 0;
     }
+    public void damageReaction() {
+        actionLock = 0;
+        direction = panel.player.direction;
+    }
 
     // SETTING THINGS UP
     public void getImage() {