I would like this>
1object (3d cylinder) in screen ,as part of my HUD. but when iam moving cylinder not rotating corectly (i tried vec_for_screen)

temp.x =500; (x_pos in screen)
temp.y =50; (y_pos in screen)
temp.z = 8; (i dont understand this parameter ,because if i want to use 2D)
vec_for_screen(temp,CAMERA);
vec_Set(object.x,temp);(set vectors)