(LWJGL) matrix stack object movement

Newbie & Debugging Questions
#1

so in my scroller game the player throws an object towards the mouse based off regular screen coordinates. This works fine, but it moves with the screen, not by itself. For example if i were to move the player upwards, the object would move in the same direction but move up with the player. Everything in my game has it’s own matrix because I need to rotate it with the mouse. for a top down type of game, how do i handle this annoying matrix stack?

This is a perfect example: https://www.youtube.com/watch?v=f504_TavOnU

when the player shoots the projectile moving the player shouldn’t affect it’s course.

#2

Threw together a miniclass to show what im doing. I still have questions about the way i use matrices.

http://pastebin.com/4RvyfdAb

#3

It looks like you are not pushing a new matrix in drawRect(), and so they are being drawn in screen space. I assume you move your view with the player, so it appears as though it is moving with the player.