add guarding mechanic and implement guard sprite handling

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

@@ -18,6 +18,7 @@ public class Player extends Entity {
     KeyHandler keyH;
     public final int screenX;
     public final int screenY;
+    private int standCount;
 
     // STATE
     public boolean attackCancel;
@@ -44,16 +45,25 @@ public class Player extends Entity {
         setDefaultValues();
         getPlayerImage();
         getPlayerAttackImage();
+        getGuardImages();
     }
 
     // DEFAULT
     public void update() {
         if(life > maxLife) life = maxLife;
 
+        // ATTACKING
         if(attacking) {
             attacking();
             return;
         }
+
+        // BLOCKING
+        if(keyH.CTLKeyPressed) {
+            guarding = true;
+            return;
+        }
+
         // MOVEMENT
         if(keyH.upPressed ||  keyH.downPressed || keyH.leftPressed || keyH.rightPressed || keyH.spacePressed) {
             if(!keyH.spacePressed) {
@@ -102,6 +112,7 @@ public class Player extends Entity {
 
             attackCancel = false;
             panel.keyH.spacePressed = false;
+            guarding = false;
 
             spriteCount++;
             if(spriteCount > 12) {
@@ -110,6 +121,13 @@ public class Player extends Entity {
                 else spriteNum = 0;
                 spriteCount = 0;
             }
+        } else {
+            standCount++;
+            if(standCount == 20) {
+                spriteNum = 1;
+                standCount = 0;
+            }
+            guarding = false;
         }
 
         if(panel.keyH.shotKeyPressed && !projectile.alive) {
@@ -123,6 +141,7 @@ public class Player extends Entity {
         invincibleCount++;
         if(invincibleCount > 60) {
             invincible = false;
+            transparent = false;
             invincibleCount = 0;
         }
 
@@ -169,11 +188,10 @@ public class Player extends Entity {
 
         int damage = panel.monster[panel.currentMap.getIndex()][index].attack - defense;
 
-        if(damage > 0) {
-            panel.playSE(6);
-            life -= damage;
-            invincible = true;
-        }
+        panel.playSE(6);
+        life -= Math.max(damage, 0);
+        if(damage != 0) panel.player.transparent = true;
+        invincible = true;
 
     }
     public void damageMonster(int index, Entity attacker, int attack, int knockbackVal) {
@@ -347,6 +365,12 @@ public class Player extends Entity {
                 break;
         }
     }
+    public void getGuardImages() {
+        guardUp = initEntitySprites("player/guarding/boy_guard_up");
+        guardDown = initEntitySprites("player/guarding/boy_guard_down");
+        guardLeft = initEntitySprites("player/guarding/boy_guard_left");
+        guardRight = initEntitySprites("player/guarding/boy_guard_right");
+    }
     public int searchItemInInventory(String itemName) {
         for(int i = 0; i < inventory.size(); i++) {
             if(inventory.get(i).name.equals(itemName)) {