title: 2d Light effect with SDL
body: <p>i would like to create a light effect on a 2d car racing written in SDL.NET (and c#). 
  The psychs Light effect is simple: the car headlights (classic conic light effect). 
  Does somebody know where can i look for some example of light managemnt via SDL ? Or maybe tell me how to solve this issue ?
  Thank you for your support !</p>
  
  <hr>
  
  <p>Update: actually i've created an image with gimp with a simulation of light.
  Then i load it in front of my car sprite to simulate the light. 
  But i don't like this type of approach... maybe is more efficient than a run-time generation/simulation of a light!</p>