title: Drawing the world coordinate system in corner of viewport in opengl
body: <p>I want to draw the world coordinates vector in left bottom corner of the viewport using opengl. Is it possible to multiply the vectors <code>(1, 0, 0)</code> <code>(0, 1, 0)</code> <code>(0, 0, 1)</code> vectors in view space by inverse of the view matrix and then project the result vectors on the screen?</p>