I have a side scroller game made in OpenGL, and I'm trying to center the player in the viewport when he moves. I know how to do it:

cameraX = Width / 2 / TileSize - playerPosX
cameraY = Height / 2 / TileSize - playerPosY

However, I have a problem. The player and "camera" move, but the player moves faster than the "camera" scrolls. So, the player can actually move out of the screen.

Some code, this is how I translate the camera:

public Camera(){
}

public void update(Player p){
    glTranslatef(-p.getPos().x - Main.WIDTH / 64 / 2, -p.getPos().y - Main.HEIGHT / 64 / 2, 1);
}

Here's how I move the player:

public void update(){
    if(Keyboard.isKeyDown(Keyboard.KEY_D)){
        this.move(MOVESPEED, 0);
    }

    if(Keyboard.isKeyDown(Keyboard.KEY_A)){
        this.move(-MOVESPEED, 0);
    }
}

The move method:

public void move(float x, float y){
    this.getPos().set(this.getPos().x + x, this.getPos().y + y);
}

And then after I move the player, I update the player's geometry, which shouldn't matter.

What am I doing wrong here, this seems like such a simple problem, yet it doesn't work!