Maybe you're right Andy, but back to the polygons... I thought about it while I was at work (as you do). I thought I could try doing the following...
1. Find the two points with the lowest and highest 'x' values.
2. For each 'x', check each side to see if it crosses the x-axis - working out the y-values in the process.
3. Draw a vertical line from the lowest point to the highest.
I haven't thought of the code for it yet, but I think there's room to insert clipping of the polygons to fit the screen too.
1. Find the two points with the lowest and highest 'x' values.
2. For each 'x', check each side to see if it crosses the x-axis - working out the y-values in the process.
3. Draw a vertical line from the lowest point to the highest.
I haven't thought of the code for it yet, but I think there's room to insert clipping of the polygons to fit the screen too.