Edges on polygon outlines not always correct

Question

I\'m using the algorithm below to generate quads which are then rendered to make an outline like this

http://img810.imageshack.us/img810/8530/uhohz.p

Answer 1

You're reversing the orientation between the first segment and the rest. The block where you pull previous values out of the output vector should set the p0 and p1 points and you should calculate p2 and p3 based on the endpoints every time.

i.e. it should be:

     if(i == 0)
     {
         p0.x = start.x + perpoffset.x - diroffset.x;
         p0.y = start.y + perpoffset.y - diroffset.y;

         p1.x = start.x - perpoffset.x - diroffset.x;
         p1.y = start.y - perpoffset.y - diroffset.y;
     }
     else
     {
         temp = (8 * (i - 1));
         p0.x = output[temp + 0];
         p0.y = output[temp + 1];
         p1.x = output[temp + 6];
         p1.y = output[temp + 7];

     }

     p2.x = end.x + perpoffset.x + diroffset.x;
     p2.y = end.y + perpoffset.y + diroffset.y;

     p3.x = end.x - perpoffset.x + diroffset.x;
     p3.y = end.y - perpoffset.y + diroffset.y;