moved rendering from the Master to the RenderEngine

src/main/java/core/general/LayerManager.java

@@ -0,0 +1,88 @@
+package core.general;
+
+import core.renderer.Drawable;
+
+import java.awt.*;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * The {@code LayerManager} works with multiple render layers that contain the Renderers
+ */
+public class LayerManager {
+
+    /**
+     * A {@code List} of the {@code Lists} which are the layers
+     */
+    private final List<List<Drawable>> layers;
+
+    /**
+     * The buffer of newly added Renderers
+     */
+    private final List<Drawable> buffer = new ArrayList<>();
+
+    /**
+     * Create a new {@code LayerManager}
+     */
+    public LayerManager() {
+        layers = new ArrayList<>();
+    }
+
+    /**
+     * Draw all {@code Renderers}
+     * @param g2d
+     */
+    public void drawAll(Graphics2D g2d){
+        layers.forEach(e -> e.forEach(f -> f.draw(g2d)));
+    }
+
+    /**
+     * Add a new {@code Renderer} to the buffer
+     * @param d
+     */
+    public void addToRendererBuffer(Drawable d){
+        buffer.add(d);
+    }
+
+    /**
+     * Add a new {@code Renderer} to the render layers. Should only be called between renderings.
+     * Creates new render layers if the requested layer doesn't exist
+     * @param d The Renderer
+     */
+    private void addRenderer(Drawable d) {
+
+        int layer = d.getLayer();
+
+        if (layer < 0) {
+            throw new IllegalArgumentException("Layer must be at least 0");
+        }
+
+        //layer exists check
+        int layerDif = layer - (layers.size() - 1);
+        if (layerDif > 0) {
+            for (int i = 0; i < layerDif; i++) {
+                layers.add(new ArrayList<>());
+            }
+        }
+
+        layers.get(layer).add(d);
+    }
+
+    /**
+     * Remove a {@code Renderer} from the render layers.
+     * <p>If the object should only temporarily be invisible, change its {@code isVisible} field</p>
+     * @param d The {@code Renderer}
+     * @return {@code true} if the element exists in its layer
+     */
+    public boolean removeRenderer(Drawable d) {
+        return layers.get(d.getLayer()).remove(d);
+    }
+
+    /**
+     * Flushes the buffer to the render layers
+     */
+    public void flush(){
+        buffer.forEach(this::addRenderer);
+        buffer.clear();
+    }
+}

src/main/java/core/general/Main.java

@@ -25,7 +25,7 @@ class Main extends JFrame {
     private void initUI() {
 
         master = new Master();
-        add(master);
+        add(master.getRenderEngine());
 
         Init.init();
 

src/main/java/core/general/Master.java

@@ -5,7 +5,6 @@ import core.objects.core.CollGameObject;
 import core.physics.Collidable;
 import core.physics.Collision;
 import core.objects.base.DebugPos;
-import core.physics.hitboxes.Hitbox;
 import core.objects.core.GameObject;
 import core.renderer.Drawable;
 import objects.Init;
@@ -13,11 +12,12 @@ import objects.Init;
 import javax.swing.*;
 import java.awt.*;
 import java.util.ArrayList;
+import java.util.List;
 
 /**
  * The main object that controls everything
  */
-public class Master extends JPanel {
+public class Master {
 
     /**
      * The ratio of height to width.
@@ -37,35 +37,29 @@ public class Master extends JPanel {
     /**
      * All GameObjects that exist
      */
-    private final ArrayList<GameObject> objects;
-
-    /**
-     * All GameObjects that can be drawn
-     * Has different render layers, 0 is on the bottom
-     */
-    private final ArrayList<ArrayList<Drawable>> drawables;
+    private final List<GameObject> objects;
 
 
     /**
      * All physics objects that exist
      */
-    private final ArrayList<Collidable> collidables;
+    private final List<Collidable> collidables;
 
     /**
      * Stores all GameObjects that were created during a frame
      */
-    private final ArrayList<GameObject> objectBuffer;
+    private final List<GameObject> objectBuffer;
 
     /**
      * All physics objects that exist
      */
-    private final ArrayList<Collidable> collidablesBuffer;
-
+    private final List<Collidable> collidablesBuffer;
 
     /**
-     * The current width and height of the game area
+     * The {@code RenderEngine} that handles everything about rendering
      */
-    private int w, h;
+    private final RenderEngine renderEngine = new RenderEngine();
+
 
     /**
      * Create a new master object
@@ -77,41 +71,12 @@ public class Master extends JPanel {
         objectBuffer = new ArrayList<>();
         collidables = new ArrayList<>();
         collidablesBuffer = new ArrayList<>();
-        drawables = new ArrayList<>();
-        drawables.add(new ArrayList<>());
     }
 
     public static Master getMaster() {
         return master;
     }
 
-    /**
-     * The mein drawing method, handles everything about drawing
-     *
-     * @param g
-     */
-    @Deprecated
-    private void doDrawing(Graphics g) {
-
-        if (getWidth() * 9 > getHeight() * 16) {
-            h = getHeight();
-            w = h / 9 * 16;
-        } else {
-            w = getWidth();
-            h = w / 16 * 9;
-        }
-
-        Graphics2D g2d = (Graphics2D) g.create();
-
-        drawables.forEach(l -> l.forEach(o -> o.draw(g2d)));
-    }
-
-
-    @Override
-    public void paintComponent(Graphics g) {
-        super.paintComponent(g);
-        doDrawing(g);
-    }
 
     /**
      * Debug a position, creates a green dot at the position
@@ -128,7 +93,7 @@ public class Master extends JPanel {
      * @param pos The position
      */
     private void debugPosObj(Vector2D pos, long lifeTime) {
-        create(new DebugPos(pos, new Vector2D(2, 2), lifeTime), 3);
+        create(new DebugPos(pos, new Vector2D(2, 2), lifeTime));
     }
 
     /**
@@ -155,7 +120,8 @@ public class Master extends JPanel {
         objects.forEach(GameObject::startUpdate);
         long time2 = System.currentTimeMillis();
         Input.frameReset();
-        repaint();
+        renderEngine.flush();
+        renderEngine.repaint();
         System.out.println("Frame took " + (System.currentTimeMillis() - time) + "ms, " + (time2 - time) + "ms for update, " + (System.currentTimeMillis() - time2) + "ms for draw");
     }
 
@@ -166,7 +132,7 @@ public class Master extends JPanel {
      */
     public Point getMouseLocation() {
         Point p = MouseInfo.getPointerInfo().getLocation();
-        SwingUtilities.convertPointFromScreen(p, this);
+        SwingUtilities.convertPointFromScreen(p, renderEngine);
         return p;
     }
 
@@ -177,46 +143,22 @@ public class Master extends JPanel {
      * @param obj         The new object
      */
     public <T extends GameObject> T create(T obj) {
-        create(obj, obj.getLayer());
-        return obj;
-    }
-
-    /**
-     * This method has to be called for every newly created GameObject
-     *
-     * @param obj         The new object
-     * @param renderLayer The render layer the object will be put on, 0 is below everything
-     */
-    public void create(GameObject obj, int renderLayer) {
         objectBuffer.add(obj);
         if (obj instanceof CollGameObject) {
             collidablesBuffer.add((Collidable) obj);
         }
-        addDrawable(obj, renderLayer);
+        renderEngine.addRenderer(obj);
+        return obj;
     }
 
     /**
      * Add a new Drawable to the render list
      *
      * @param d     The drawable
-     * @param layer The layer it should be put on (>=0)
      */
-    public void addDrawable(Drawable d, int layer) {
-
-        if (layer < 0) {
-
-            throw new IllegalArgumentException("Layer must be at least 9");
-        }
-
-        //layer exists check
-        int layerDif = layer - (drawables.size() - 1);
-        if (layerDif > 0) {
-            for (int i = 0; i < layerDif; i++) {
-                drawables.add(new ArrayList<>());
-            }
-        }
-
-        drawables.get(layer).add(d);
+    @Deprecated
+    public void addDrawable(Drawable d) {
+        renderEngine.addRenderer(d);
     }
 
 
@@ -251,25 +193,29 @@ public class Master extends JPanel {
     }
 
     public int getW() {
-        return w;
+        return renderEngine.getW();
     }
 
     public int getH() {
-        return h;
+        return renderEngine.getH();
     }
 
     public void destroy(GameObject gameObject) {
         objectBuffer.remove(gameObject);
         gameObject.getParent().removeChild(gameObject);
 
-        drawables.get(gameObject.getLayer()).remove(gameObject);
+        renderEngine.removeRenderer(gameObject);
 
         if (gameObject instanceof Collidable) {
             collidablesBuffer.remove(gameObject);
 
             if (Init.DEBUG_MODE) {
-                drawables.get(Hitbox.HITBOX_RENDER_LAYER).remove(((CollGameObject) gameObject).getHitbox());
+                renderEngine.removeRenderer(((CollGameObject) gameObject).getHitbox());
             }
         }
     }
+
+    public RenderEngine getRenderEngine() {
+        return renderEngine;
+    }
 }

src/main/java/core/general/RenderEngine.java

@@ -0,0 +1,103 @@
+package core.general;
+
+import core.renderer.Drawable;
+
+import javax.swing.*;
+import java.awt.*;
+
+/**
+ * The {@code RenderEngine} handles the rendering of all {@code Renderers}
+ * c<p>The {@code RenderEngine} extends JPanel and can be integrated into a JFrame. It gets the drawcall from resizing/moving the JPanel
+ * or from the {@code Master}</p>
+ */
+public class RenderEngine extends JPanel {
+
+    /**
+     * The current width and height of the game area
+     */
+    private int w, h;
+
+    /**
+     * The {@code LayerManager} for the render layers
+     */
+    private final LayerManager layerManager;
+
+    /**
+     * Construct a new {@code RenderEngine}
+     */
+    public RenderEngine() {
+        layerManager = new LayerManager();
+    }
+
+    /**
+     * The mein drawing method, handles everything about drawing
+     *
+     * @param g The {@code Graphics} object
+     */
+    private void doDrawing(Graphics g) {
+
+        if (getWidth() * 9 > getHeight() * 16) {
+            h = getHeight();
+            w = h / 9 * 16;
+        } else {
+            w = getWidth();
+            h = w / 16 * 9;
+        }
+
+        Graphics2D g2d = (Graphics2D) g.create();
+
+        layerManager.drawAll(g2d);
+    }
+
+
+    /**
+     * The paintComponent method is called from Swing.
+     * @param g
+     */
+    @Override
+    public void paintComponent(Graphics g) {
+        super.paintComponent(g);
+        doDrawing(g);
+    }
+
+    /**
+     * Add a {@code Renderer} to the scene. Gets added to the buffer
+     * @param d The {@code Renderer}
+     */
+    public void addRenderer(Drawable d){
+        layerManager.addToRendererBuffer(d);
+    }
+
+    /**
+     * Remove a {@code Renderer} from the engine because it won't be needed anymore.
+     * <p>If the object should only temporarily be invisible, change its {@code isVisible} field</p>
+     * @param d
+     * @return
+     */
+    public boolean removeRenderer(Drawable d){
+        return layerManager.removeRenderer(d);
+    }
+
+    /**
+     * Get the true width of the current screen
+     * @return The width in Java2D coordinates
+     */
+    public int getW() {
+        return w;
+    }
+
+    /**
+     * Get the true height of the current screen
+     * @return The height in Java2D coordinates
+     */
+    public int getH() {
+        return h;
+    }
+
+    /**
+     * Flush the buffer
+     */
+    public void flush() {
+        layerManager.flush();
+    }
+}

src/main/java/core/physics/hitboxes/Hitbox.java

@@ -24,4 +24,9 @@ public abstract class Hitbox implements Drawable {
     public String toString() {
         return super.toString();
     }
+
+    @Override
+    public int getLayer() {
+        return HITBOX_RENDER_LAYER;
+    }
 }

src/main/java/core/physics/hitboxes/RectHitBox.java

@@ -34,7 +34,7 @@ public class RectHitBox extends Hitbox {
         this.y1 = Vector2D.add(x1, new Vector2D(0, size.y));
         this.y2 = Vector2D.add(x1, new Vector2D(size.x, size.y));
         if (Init.DEBUG_MODE) {
-            Master.getMaster().addDrawable(this, HITBOX_RENDER_LAYER);
+            //Master.getMaster().addDrawable(this);
         }
     }
 

src/main/java/core/renderer/Drawable.java

@@ -17,4 +17,10 @@ public interface Drawable {
      * @param g2d    The {@code Graphics2D} object given by the master
      */
     void draw(Graphics2D g2d);
+
+    /**
+     * Returns the layer of the Drawable
+     * @return The render layer
+     */
+    int getLayer();
 }

src/main/java/core/renderer/RoundRectRenderer.java

@@ -29,8 +29,6 @@ public class RoundRectRenderer extends Renderer {
         int xCenterAbs = (int) (abs.x + sizeAbs.x / 2);
         int yCenterAbs = (int) (abs.y + sizeAbs.y / 2);
 
-        master.debugPos(object.getCenterPosition(), 500);
-
         g2d.setPaint(color);
 
         g2d.rotate(object.getRotation(), xCenterAbs, yCenterAbs);

src/main/java/objects/ships/Turret.java

@@ -41,13 +41,10 @@ public class Turret extends GameObject {
                 int xCenterAbs = (int) (abs.x + sizeAbs / 2);
                 int yCenterAbs = (int) (abs.y + sizeAbs / 2);
 
-                Master.debugPos(getMapCoords(position), 1);
-
                 g2d.rotate(rotation, xCenterAbs, yCenterAbs);
 
                 g2d.fillOval((int) abs.x, (int) abs.y, sizeAbs, sizeAbs);
 
-                Master.debugPos(abs, 1000);
 
                 //BARRELS---------------------------------------
                 g2d.setStroke(new BasicStroke((int) Coordinates.getWorldCoordinates(new Vector2D(object.getSize().x / barrelAmount / BARREL_THICKNESS, 0)).x, BasicStroke.CAP_BUTT,
@@ -98,13 +95,11 @@ public class Turret extends GameObject {
                 lastShot = System.currentTimeMillis();
 
                 Vector2D shellVel = Vector2D.getUnitVector(rotation).negative().multiply(SHELL_SPEED);
-                //master.debugPos(centerMap);
                 Vector2D pos = Vector2D.rotateAround(
                         centerMap,
                         spawnPosNR,
                         rotation);
 
-                //master.debugPos(pos);
                 master.create(new Shell(pos, new Vector2D(SHELL_SIZE, SHELL_SIZE), shellVel));
             }
         }