Ohh yes... Shadow volumes again!

hehe… its me again…
oh… yes… an other question about shadow volumes…
I was reading the eric’s tutorial at gamasutra about shadow volumes.
Somewere says that for point lights we need a list of quads do calculate the shadow.
What if i have one triangle only? how i can make a list of quads from a tringle?

thanks in advance!

Take the three edges and extrude them away from the point light, gives three quads.

You also need to cap the end of the volume, so you need to add another triangle at the end of that extruded volume.