   Texturing a line
  for bullets in my game I'm using little lines with thickness of about two.  Is there any way I could put a picture of a bullet on them?Thanks.   
  you could, but it probably won't look right.  Why not just use textured quads?  Easy to implement, and it's probably your best bet.   ;  GL_LINES as well as GL_POINT will be tetxured with current texture + current texturecoord (if texturing is enabled etc)though as Morpheus011 saiz youre prolly best off with a strechted quad ;  Regardless, doesn't a line use the bounded texture as a 1D texture when rendered?Use a quad. Fussing over the performance of sending two more vertices to the graphic card per bullet would be ridiculous unless you literally have millions of bullets at once. ;)   ;  It wont really matter what method you use if the rendering will only be a couple of pixels wide.  I do, however agree that you should use a textured quad.  It really isnt all that difficult to set up and they look pretty good.   