Fixed #139 wrong coordinates.

Tested with the DemoPhysicsMouse demo.

gdx2d-demoDesktop/src/ch/hevs/gdx2d/demos/controllers/DemoControllers.java

@@ -17,7 +17,7 @@
  */
 public class DemoControllers extends PortableApplication {
 
-  private final static String TAG = DemoControllers.class.getSimpleName();
+  private static final String TAG = DemoControllers.class.getSimpleName();
 
   public static void main(String[] args) {
     new DemoControllers();

gdx2d-demoDesktop/src/ch/hevs/gdx2d/demos/physics/mouse_interaction/DemoPhysicsMouse.java

@@ -9,6 +9,7 @@
 import ch.hevs.gdx2d.desktop.physics.DebugRenderer;
 import ch.hevs.gdx2d.lib.GdxGraphics;
 import ch.hevs.gdx2d.lib.physics.PhysicsWorld;
+import ch.hevs.gdx2d.lib.utils.Logger;
 import com.badlogic.gdx.Gdx;
 import com.badlogic.gdx.math.Vector2;
 import com.badlogic.gdx.physics.box2d.*;
@@ -19,30 +20,26 @@
 import java.util.Random;
 
 /**
- * A demo on how to use the mouse to move objects with box2d
+ * A demo on how to use the mouse to move objects with {@code Box2D}.
  *
  * @author Pierre-André Mudry, mui 2013
  * @version 1.1
  */
 public class DemoPhysicsMouse extends PortableApplication {
 	protected Body hitBody = null;
-	/**
-	 * ground body to connect the mouse joint to *
-	 */
-	protected Body groundBody;
-	/**
-	 * our mouse joint *
-	 */
-	protected MouseJoint mouseJoint = null;
-	World world = PhysicsWorld.getInstance();
-	// Contains all the objects that will be simulated
-	DebugRenderer debugRenderer;
+	protected Body groundBody; // Ground body to connect the mouse joint to
+	protected MouseJoint mouseJoint = null; // Our mouse joint
+
+  World world = PhysicsWorld.getInstance();
+
+	DebugRenderer debugRenderer; // Contains all the objects that will be simulated
 	/**
 	 * we instantiate this vector and the callback here so we don't irritate the
 	 * GC
 	 */
 	Vector2 testPoint = new Vector2();
 	Vector2 target = new Vector2();
+
 	// Called for AABB lookup
 	QueryCallback callback = new QueryCallback() {
 		@Override
@@ -56,10 +53,6 @@ public boolean reportFixture(Fixture fixture) {
 		}
 	};
 
-	public DemoPhysicsMouse() {
-		super();
-	}
-
 	public DemoPhysicsMouse(int w, int h) {
 		super(w, h);
 	}
@@ -72,8 +65,7 @@ public static void main(String[] args) {
 	public void onInit() {
 		setTitle("Mouse interactions in box2d, mui 2013");
 
-		// we also need an invisible zero size ground body
-		// to which we can connect the mouse joint
+		// We also need an invisible zero size ground body to which we can connect the mouse joint
 		BodyDef bodyDef = new BodyDef();
 		groundBody = world.createBody(bodyDef);
 
@@ -103,49 +95,40 @@ public void onGraphicRender(GdxGraphics g) {
 
 		g.drawFPS();
 		g.drawSchoolLogoUpperRight();
-
 	}
 
 	@Override
 	public void onDrag(int x, int y) {
-		// if a mouse joint exists we simply update
-		// the target of the joint based on the new
-		// mouse coordinates
 		if (mouseJoint != null) {
+      // If a mouse joint exists we simply update the target of the joint based on the new mouse coordinates
 			mouseJoint.setTarget(target.set(x, y).scl(PhysicsConstants.PIXEL_TO_METERS));
 		}
-		return;
 	}
 
 	@Override
 	public void onRelease(int x, int y, int button) {
-		// if a mouse joint exists we simply destroy it
 		if (mouseJoint != null) {
+      // If a mouse joint exists we simply destroy it
 			world.destroyJoint(mouseJoint);
 			mouseJoint = null;
 		}
 	}
 
+  @Override
 	public void onClick(int x, int y, int button) {
-		// translate the mouse coordinates to world coordinates
-		// cam.unproject(testPoint.set(x, y, 0));
-		testPoint.x = x;
-		testPoint.y = y;
-
-		testPoint.scl(PhysicsConstants.PIXEL_TO_METERS);
+		// Translate the mouse coordinates to world coordinates
+		testPoint.set(x, y).scl(PhysicsConstants.PIXEL_TO_METERS);
 
-		// ask the world which bodies are within the given
-		// bounding box around the mouse pointer
+		// Ask the world which bodies are within the given bounding box around the mouse pointer
 		hitBody = null;
 
 		world.QueryAABB(callback, testPoint.x - 5, testPoint.y - 5, testPoint.x + 5, testPoint.y + 5);
 
-		// ignore kinematic bodies, they don't work with the mouse joint
+		// Ignore kinematic bodies, they don't work with the mouse joint
 		if (hitBody == null || hitBody.getType() == BodyType.KinematicBody)
 			return;
 
-		// if we hit something we create a new mouse joint
-		// and attach it to the hit body.
+		// If we hit something we create a new mouse joint and attach it to the hit body
 		if (hitBody != null) {
 			MouseJointDef def = new MouseJointDef();
 			def.bodyA = groundBody;
@@ -158,7 +141,6 @@ public void onClick(int x, int y, int button) {
 			mouseJoint = (MouseJoint) world.createJoint(def);
 			hitBody.setAwake(true);
 		}
-		return;
 	}
 
 	@Override

gdx2d-library/gdx2d-desktop/src/main/java/ch/hevs/gdx2d/desktop/GdxInputProcessor.java

@@ -7,6 +7,8 @@
 
 /**
  * Input mouse and keyboard processor for gdx2d.
+ * <p/>
+ * Automatically quits the application when the {@code ESCAPE} key is pressed.
  *
  * @see com.badlogic.gdx.InputProcessor
  *
@@ -34,7 +36,7 @@ class GdxInputProcessor extends InputAdapter {
 
 	@Override
 	public boolean touchUp(int screenX, int screenY, int pointer, int button) {
-		app.onRelease(screenX, screenY, button);
+		app.onRelease(screenX, Gdx.graphics.getHeight() - screenY, button);
 		return false;
 	}