Fixed the rotation pivot and added scalability

log.txt

@@ -1,4 +1,4 @@
-2007-03-17 17:23:35:625 # Loading sound: data/sounds/test.wav
-2007-03-17 17:23:35:656 # Sound sources: quantity=0
-2007-03-17 17:23:35:656 # Stoping sound: source=0
-2007-03-17 17:23:35:656 # Playing sound: source=0 buffer=264767544
+2007-03-18 18:37:49:515 # Loading sound: data/sounds/test.wav
+2007-03-18 18:37:49:531 # Sound sources: quantity=0
+2007-03-18 18:37:49:531 # Stoping sound: source=0
+2007-03-18 18:37:49:531 # Playing sound: source=0 buffer=264767544

src/ei/engine/LWJGLGameWindow.java

@@ -130,9 +130,11 @@ public class LWJGLGameWindow {
 		GL11.glMatrixMode(GL11.GL_MODELVIEW);
 		GL11.glLoadIdentity();
 		
+		GL11.glPushMatrix();
 		//let subsystem paint
 		GameStateManager.getInstance().render();
 		render();
+		GL11.glPopMatrix();
 		
 		//update window contents
 		Display.update();

src/ei/engine/scene/Entity.java

@@ -36,7 +36,7 @@ public abstract class Entity {
 		this.name = name;
 		location = new Vector2f();
 		rotation = new Vector3f();
-		size = new Vector2f();
+		size = new Vector2f(1,1);
 	}
 	
 	/**
@@ -83,20 +83,20 @@ public abstract class Entity {
 	}
 	
 	/**
-	 * Get the size of the entity
+	 * Get the scale of the entity
 	 * 
 	 * @return The Location of the entity
 	 */
-	public Vector2f getSize() {
+	public Vector2f getScale() {
 		return size;
 	}
 	
 	/**
-	 * set the size of this entity in pixels
+	 * set the scale of this entity in pixels
 	 * 
 	 * @param s The size of the entity
 	 */
-	public void setSize(Vector2f s) {
+	public void setScale(Vector2f s) {
 		size = s;
 	}
 
@@ -110,15 +110,19 @@ public abstract class Entity {
 	}
 	
 	/**
-	 * Sets the location of the entity in opengl plus
-	 * the parameter values before rendering.
+	 * Sets the location of the entity in opengl
 	 * 
 	 * @param x The value to add x
 	 * @param y The value to add y
 	 */
 	protected void setTranslationGL(float x, float y){
 		// translate to the right location and prepare to draw
-		GL11.glTranslatef(location.getX()+x, location.getY()+y, 0);
+		GL11.glTranslatef(x,y, 0);
+	}
+	
+	protected void setScaleGL(){
+		// translate to the right location and prepare to draw
+		GL11.glScalef(size.getX(), size.getY(), 0.0f);
 	}
 	
 	/**

src/ei/engine/scene/Sprite.java

@@ -93,11 +93,14 @@ public class Sprite extends Entity {
 		//Reset The Current Modelview Matrix
 		GL11.glLoadIdentity();
 
-		//set rotation of the sprite 
-		// And the rotation
-		setRotationGL();
-		//Set the location
-		setTranslationGL();
+		//Sets the scale of the sprite
+		super.setScaleGL();
+		//Sets the location
+		super.setTranslationGL();
+		//the rotation
+		super.setRotationGL();
+		//and sets back the rotation so that the rotation pivot is the center of the sprite
+		super.setTranslationGL(-texture.getImageWidth()/2,-texture.getImageHeight()/2);
 		
 		// bind to the appropriate texture for this sprite
 		texture.bindGL();

src/ei/game/gamestate/InGameState.java

@@ -15,10 +15,13 @@ public class InGameState extends GameState{
 	public InGameState(String name){
 		super(name);
 		rootNode = new Node("InGameNode");
+		
 		sprite1 = new Sprite("tank","data/units/tank.png");
+		sprite1.setScale(new Vector2f(0.5f,0.5f));
 		rootNode.add(sprite1);
+		
 		sound1 = new Sound("sound","data/sounds/test.wav");
-		sound1.play();
+		sound1.loop();
 		rootNode.add(sound1);
 	}
 	
@@ -29,7 +32,7 @@ public class InGameState extends GameState{
 
 	@Override
 	public void update() {
-		sprite1.getLocation().add(0.1f);
+		sprite1.getLocation().add(0.5f);
 		sprite1.getRotation().add(0, 0, 0.5f);
 		sound1.getLocation().add(new Vector2f(1,0));
 		rootNode.update();