LWJGL + Slick-util + simple texture - glitchy display.

Newbie & Debugging Questions
#1

So I’ve decided to play around with LWJGL. To start with something simple, I wrote a standard ‘ball bouncing around the screen’…

Here’s how I initialize the display:

            Display.setDisplayMode(new DisplayMode(SCREEN_WIDTH, SCREEN_HEIGHT));
            Display.setFullscreen(false);
            Display.setVSyncEnabled(true);
            Display.setTitle("TestField");
            Display.create();

            GL11.glEnable(GL11.GL_TEXTURE_2D);
            GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
            GL11.glEnable(GL11.GL_BLEND);
            GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);

            GL11.glViewport(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
            GL11.glMatrixMode(GL11.GL_MODELVIEW);

            GL11.glMatrixMode(GL11.GL_PROJECTION);
            GL11.glLoadIdentity();
            GL11.glOrtho(0, SCREEN_WIDTH, SCREEN_HEIGHT, 0, 1, -1);
            GL11.glMatrixMode(GL11.GL_MODELVIEW);

Here’s how I draw things in the main loop:

                    GL11.glClear(GL11.GL_COLOR_BUFFER_BIT);

                    field.draw();
                    
                    Display.update();
                    Display.sync(100);

And here’s how I draw one single ball in field.draw():

        texture.bind();
       
        GL11.glBegin(GL11.GL_QUADS);
        GL11.glTexCoord2f(0, 0);
        GL11.glVertex2f(x, y);
        GL11.glTexCoord2f(1, 0);
        GL11.glVertex2f(x + texture.getTextureWidth(), y);
        GL11.glTexCoord2f(1, 1);
        GL11.glVertex2f(x + texture.getTextureWidth(), y + texture.getTextureHeight());
        GL11.glTexCoord2f(0, 1);
        GL11.glVertex2f(x, y + texture.getTextureHeight());
        GL11.glEnd();

And here’s the result how it looks:

http://i63.photobucket.com/albums/h134/Nejiro/glitch.png

As you can see, the ball appears quite glitchy…

Here’s the entire netbeans project folder:

http://www.speedyshare.com/uKHSZ/FieldTreeTest.zip

So, what’s the problem there? I can’t find why the ball is drawn incorrectly… :’(

#2

For the texcoords, use texture.getWidth/Height() instead of 1.

#3

See here