creation of the Rotational Element class

src/tanks/DrawableElement.java

@@ -21,13 +21,13 @@ public abstract class DrawableElement
     public BufferedImage img;
     
     //draws img onto the screen
-    public void Draw(Graphics g)
+    public void draw(Graphics g)
     {
         g.drawImage(img, x, y, null);
     }
     
     //loads the image from the disk into the Buffered image img
-    public void LoadImage()
+    public void loadImage()
     {
         img = null;
         try

src/tanks/DrawableObject.java

@@ -1,9 +0,0 @@
-package tanks;
-
-/*
-class that contains the image file location and cordinates of the object
-*/
-public class DrawableObject 
-{
-    
-}

src/tanks/RotationalElement.java

@@ -1,12 +1,70 @@
+/*
+    jeffery R
+    5-21-16
+    super class for any object that moves at an angle
+ */
+
 package tanks;
 
-/**
- * 
- * Set 3 class project
- * 5-19-16
- * 
- */
-public class RotationalElement 
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Rectangle;
+import java.awt.geom.AffineTransform;
+import java.awt.geom.Area;
+
+public abstract class RotationalElement extends GameElement
 {
+    //0-360 angle which determines which direction the object is facing
+    public double direction;
+    
+    //convertes degrease to radians
+    public double degToRad()
+    {
+        return direction * (Math.PI/180);
+    }
+    
+    //converts radians to degrees
+    public double radToDeg()
+    {
+        return direction * (180/ Math.PI);
+    }
+    
+    /*
+        moves the object's x and y according to its degrees
+        the multiplier is used to move at a specific speed
+        a positive multiplier moves the object backwards
+        a negative multiplier moves the object forwards
+    */
+    
+    public void move(int multiplier)
+    {
+        y += Math.sin(degToRad()) * multiplier;
+        x += Math.cos(degToRad()) * multiplier;
+    }
     
+    /*
+        Draws the object at a specified angle rotated about the center
+    */
+    @Override
+    public void draw(Graphics g)
+    {
+        //creates the object to rotate the image
+        AffineTransform tf = AffineTransform.getTranslateInstance(x, y);
+        
+        //rotates the image around the center
+        tf.rotate(degToRad(), width/2, height/2);
+        
+        //draws the rotated image on the panel
+        ((Graphics2D)(g)).drawImage(img, tf, null);
+    }
+    /*
+        Sets the area variable shape in GameElement to be used in collision code
+    */
+    @Override
+    public void setShape() 
+    {
+        AffineTransform rotate = AffineTransform.getRotateInstance(degToRad(), x, y);
+        
+        shape = new Area(rotate.createTransformedShape(new Rectangle(x,y,width, height)));
+    }
 }