//
// Execution trace of a scan line polygon filling routine for the
// general case.  Polygon taken from Computer Graphics, by Berger.
//
// Mark Maloof
// July 1998
//

Vertex table:
v0: (9.0, 1.0)
v1: (2.0, 1.0)
v2: (3.0, 3.0)
v3: (4.0, 7.0)
v4: (6.0, 5.0)
v5: (8.0, 8.0)
v6: (11.0, 4.0)

Edge table
e0: 0  1
e1: 1  2
e2: 2  3
e3: 3  4
e4: 4  5
e5: 5  6
e6: 6  0

yTop: 1
yBottom: 8

Edge Table:
1: 2.0 2 0.5-->9.0 3 0.66-->null
2: null
3: 3.0 7 0.25-->null
4: 11.0 8 -0.75-->null
5: 6.0 7 -1.0-->6.0 8 0.66-->null
6: null
7: null
8: null
  
y = 1: 
  Active list: 2.0 2 0.5-->9.0 3 0.66-->null
  filling...
    setpixel(2,1)
    setpixel(3,1)
    setpixel(4,1)
    setpixel(5,1)
    setpixel(6,1)
    setpixel(7,1)
    setpixel(8,1)
  updating...
  resorting...
  New active list: 2.5 2 0.5-->9.66 3 0.66-->null
  
y = 2: 
  Active list: 2.5 2 0.5-->9.66 3 0.66-->null
  filling...
    setpixel(3,2)
    setpixel(4,2)
    setpixel(5,2)
    setpixel(6,2)
    setpixel(7,2)
    setpixel(8,2)
    setpixel(9,2)
  updating...
  resorting...
  New active list: 10.32 3 0.66-->null
  
y = 3: 
  Active list: 3.0 7 0.25-->10.32 3 0.66-->null
  filling...
    setpixel(3,3) --> setpixel(9,3)
  updating...
  resorting...
  New active list: 3.25 7 0.25-->null

y = 4: 
  Active list: 3.25 7 0.25-->11.0 8 -0.75-->null
  filling...
    setpixel(3,4) --> setpixel(10,4)
  updating...
  resorting...
  New active list: 3.5 7 0.25-->10.25 8 -0.75-->null
  
y = 5: 
  Active list: 3.5 7 0.25-->6.0 8 0.66-->6.0 7 -1.0-->10.25 8 -0.75-->null
  filling...
    setpixel(4,5) --> setpixel(9,5)
  updating...
  resorting...
  New active list: 3.75 7 0.25-->5.0 7 -1.0-->6.67 8 0.66-->9.5 8 -0.75-->null
  
y = 6: 
  Active list: 3.75 7 0.25-->5.0 7 -1.0-->6.67 8 0.66-->9.5 8 -0.75-->null
  filling...
    setpixel(4,6)
    setpixel(7,6) --> setpixel(9,6)
  updating...
  resorting...
  New active list: 4.0 7 0.25-->4.0 7 -1.0-->7.34 8 0.66-->8.75 8 -0.75-->null
  
y = 7: 
  Active list: 4.0 7 0.25-->4.0 7 -1.0-->7.34 8 0.66-->8.75 8 -0.75-->null
  filling...
    setpixel(7,7)
    setpixel(8,7)
  updating...
  resorting...
  New active list: 8.0 8 0.6666666666666666-->8.0 8 -0.75-->null
  
y = 8: 
  Active list: 8.0 8 0.6666666666666666-->8.0 8 -0.75-->null
  filling...
  updating...
  resorting...
  New active list: null