add EnvironmentManager and Lighting classes for enhanced environment rendering

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

@@ -6,6 +6,7 @@ import de.miaurizius.jgame2d.core.enums.Map;
 import de.miaurizius.jgame2d.core.handlers.*;
 import de.miaurizius.jgame2d.entity.Entity;
 import de.miaurizius.jgame2d.entity.Player;
+import de.miaurizius.jgame2d.environment.EnvironmentManager;
 import de.miaurizius.jgame2d.tile.TileManager;
 import de.miaurizius.jgame2d.tile.interactive.InteractiveTile;
 
@@ -56,6 +57,7 @@ public class GamePanel extends JPanel implements Runnable {
     public Sound music = new Sound();
     public Config config = new Config(this);
     public PathFinder pFinder = new PathFinder(this);
+    public EnvironmentManager eManager = new EnvironmentManager(this);
     Thread gameThread;
 
     // ENTITY AND OBJECT
@@ -177,6 +179,10 @@ public class GamePanel extends JPanel implements Runnable {
         for(Entity entity : entityList) entity.draw(fg2);
         entityList.clear();
 
+        // ENVIRONMENT
+        eManager.draw(fg2);
+
+        // UI
         ui.draw(fg2);
 
         long drawEnd = System.nanoTime();
@@ -229,6 +235,7 @@ public class GamePanel extends JPanel implements Runnable {
         assetSetter.setNPC();
         assetSetter.setMonster();
         assetSetter.setITiles();
+        eManager.setup();
         gameState = GameState.TITLE;
 
         tempScreen = new BufferedImage(screenWidth, screenHeight, BufferedImage.TYPE_INT_RGB);

src/de/miaurizius/jgame2d/environment/EnvironmentManager.java

@@ -0,0 +1,24 @@
+package de.miaurizius.jgame2d.environment;
+
+import de.miaurizius.jgame2d.core.GamePanel;
+
+import java.awt.*;
+
+public class EnvironmentManager {
+
+    GamePanel panel;
+    Lighting lighting;
+
+    public EnvironmentManager(GamePanel panel) {
+        this.panel = panel;
+    }
+
+    public void setup() {
+        lighting = new Lighting(panel, 300);
+    }
+
+    public void draw(Graphics2D g2) {
+        lighting.draw(g2);
+    }
+
+}

src/de/miaurizius/jgame2d/environment/Lighting.java

@@ -0,0 +1,69 @@
+package de.miaurizius.jgame2d.environment;
+
+import de.miaurizius.jgame2d.core.GamePanel;
+
+import java.awt.*;
+import java.awt.geom.Area;
+import java.awt.geom.Ellipse2D;
+import java.awt.geom.Rectangle2D;
+import java.awt.image.BufferedImage;
+
+public class Lighting {
+
+    GamePanel panel;
+    BufferedImage darknessFilter;
+
+    public Lighting(GamePanel panel, int circleSize) {
+        this.panel = panel;
+        darknessFilter = new BufferedImage(panel.screenWidth, panel.screenHeight, BufferedImage.TYPE_INT_ARGB);
+        Graphics2D g2 = darknessFilter.createGraphics();
+
+        Area screenArea = new Area(new Rectangle2D.Double(0, 0, panel.screenWidth, panel.screenHeight));
+        int centerX = panel.player.screenX + panel.tileSize/2;
+        int centerY = panel.player.screenY + panel.tileSize/2;
+
+        double x = centerX - (double) circleSize /2;
+        double y = centerY - (double) circleSize /2;
+
+        Shape circleShape = new Ellipse2D.Double(x, y, circleSize, circleSize);
+        Area circleArea = new Area(circleShape);
+        screenArea.subtract(circleArea);
+
+        RadialGradientPaint gPaint = getRadialGradientPaint((float) circleSize, centerX, centerY);
+        g2.setPaint(gPaint);
+
+        g2.fill(circleArea);
+
+        g2.setColor(new Color(0, 0, 0, 0.95F));
+        g2.fill(screenArea);
+        g2.dispose();
+    }
+
+    private static RadialGradientPaint getRadialGradientPaint(float circleSize, int centerX, int centerY) {
+        Color[] color = new Color[] {
+            new Color(0, 0, 0, 0.1f),
+            new Color(0, 0, 0, 0.42f),
+            new Color(0, 0, 0, 0.52f),
+            new Color(0, 0, 0, 0.61f),
+            new Color(0, 0, 0, 0.69f),
+            new Color(0, 0, 0, 0.76f),
+            new Color(0, 0, 0, 0.82f),
+            new Color(0, 0, 0, 0.87f),
+            new Color(0, 0, 0, 0.91f),
+            new Color(0, 0, 0, 0.94f),
+            new Color(0, 0, 0, 0.96f),
+            new Color(0, 0, 0, 0.97f)
+        };
+
+        float[] fraction = new float[] {
+            0f, 0.4f, 0.5f, 0.6f, 0.65f, 0.7f, 0.75f, 0.8f, 0.85f, 0.9f, 0.95f, 1f
+        };
+
+        return new RadialGradientPaint(centerX, centerY, (circleSize /2), fraction, color);
+    }
+
+    public void draw(Graphics2D g2) {
+        g2.drawImage(darknessFilter, 0, 0, null);
+    }
+
+}