Nelson's word today is 'Ant'!

I was thinking about rivers and seas this morning and want to draw the landmass outside, in? We find the low point in the ocean and find the higher points around that low point, rivers to the sea, you see? 8-P Get a random negative height, below sea level, then find a random point some fraction of two pi around this initial point at some height averaged with that initial height. This center point and two consecutive points make up a triangle which is below sea level and blue is all three point are below zero height, above sea level and green if above zero, and needs to be subdivided if the three points are not all above or below sea level. You would subdivide two points at zero, sea level if they’re above and below. I need to work out the logic for this…