Added a TexturLoader and Nodes, Sprites and some modifications

src/ei/engine/scene/Sprite.java

@@ -0,0 +1,153 @@
+package ei.engine.scene;
+
+import java.io.IOException;
+
+import org.lwjgl.opengl.GL11;
+
+import ei.engine.math.Vector2I;
+import ei.engine.util.Texture;
+import ei.engine.util.TextureLoader;
+
+/**
+ * Implementation of sprite that uses an OpenGL quad and a texture
+ * to render a given image to the screen.
+ * 
+ * @author Kevin Glass
+ * @author Brian Matzon
+ * @author Ziver Koc
+ */
+public class Sprite {
+	/** The texture that stores the image for this sprite */
+	private Texture texture;
+  
+	/** The location of this sprite in pixels*/
+	private Vector2I location;
+	
+	/** The name of this sprite */
+	private String name;
+	
+	/**
+	 * Create a new empty sprite
+	 * 
+	 * @param window The window in which the sprite will be displayed
+	 * @param ref A reference to the image on which this sprite should be based
+	 */
+	public Sprite(String name) {
+			this.name = name;			
+			texture = null;			
+			location = new Vector2I(0,0);
+	}
+	
+	/**
+	 * Create a new sprite from a specified image.
+	 * 
+	 * @param name The name of the sprite
+	 * @param ref A reference to the image on which this sprite should be based
+	 */
+	public Sprite(String name, String ref) {
+		try {
+			this.name = name;			
+			texture = TextureLoader.getTextureLoaderInstance().getTexture(ref);
+			
+			location = new Vector2I(texture.getImageWidth(),texture.getImageHeight());
+		} catch (IOException e) {
+			// a tad abrupt, but our purposes if you can't find a 
+			// sprite's image you might as well give up.
+			System.err.println("Unable to load texture: "+ref);
+			System.exit(0);
+		}
+	}
+	
+	/**
+	 * Get the width of this sprite in pixels
+	 * 
+	 * @return The width of this sprite in pixels
+	 */
+	public int getWidth() {
+		if(texture == null){
+			return 0;
+		}
+		return texture.getImageWidth();
+	}
+
+	/**
+	 * Get the height of this sprite in pixels
+	 * 
+	 * @return The height of this sprite in pixels
+	 */
+	public int getHeight() {
+		if(texture == null){
+			return 0;
+		}
+		return texture.getImageHeight();
+	}
+	
+	/**
+	 * @return The name of this sprite
+	 */
+	public String getName() {
+		return name;
+	}
+
+	/**
+	 * Get the height of this sprite in pixels
+	 * 
+	 * @return The height of this sprite in pixels
+	 */
+	public int getLocation() {
+		if(texture == null){
+			return 0;
+		}
+		return texture.getImageHeight();
+	}
+
+	/**
+	 * set the location of this sprite in pixels
+	 * @param x The x coordinate of the sprite
+	 * @param y The y coordinate of the sprite
+	 */
+	public void setLocation(int x, int y) {
+		setLocation(new Vector2I(x,y));
+	}
+	
+	/**
+	 * set the location of this sprite in pixels
+	 * @param v The location of the sprite
+	 */
+	public void setLocation(Vector2I v) {
+		location = v;
+	}
+	
+	/**
+	 * Draw the sprite
+	 */
+	public void render() {
+		// store the current model matrix
+		GL11.glPushMatrix();
+		
+		// bind to the appropriate texture for this sprite
+		texture.bind();
+    
+		// translate to the right location and prepare to draw
+		GL11.glTranslatef(location.getX(), location.getY(), 0);		
+    	GL11.glColor3f(1,1,1);
+		
+		// draw a quad textured to match the sprite
+    	GL11.glBegin(GL11.GL_QUADS);
+		{
+	      GL11.glTexCoord2f(0, 0);
+	      GL11.glVertex2f(0, 0);
+	      GL11.glTexCoord2f(0, texture.getImageWidth());
+	      GL11.glVertex2f(0, texture.getImageHeight());
+	      GL11.glTexCoord2f(texture.getWidth(), texture.getHeight());
+	      GL11.glVertex2f(texture.getImageWidth(),texture.getImageHeight());
+	      GL11.glTexCoord2f(texture.getWidth(), 0);
+	      GL11.glVertex2f(texture.getImageWidth(),0);
+		}
+		GL11.glEnd();
+		
+		// restore the model view matrix to prevent contamination
+		GL11.glPopMatrix();
+	}
+	
+}