opengl question. mouse location vs gluperspective

curently, my viewport is set to the max scren resolution (1024x768)
i have a mouse function that takes the coords of a mouse and uses that as the center to draw a square (mock paddle)

the problem is that, now what im using gluperspective and not glortho, a little mouse movement will send the paddle flying of to the side. back when i used glortho, the mouse was perfectly centerd on the paddle each time. how can i go back to that using gluperspective?

thanks

Try using gluProject to project your 2d mouse point to the window coordinate system. Then you will know the corresponding location you should draw your paddle at. Hope this helps.