Derive fourth coordinate from three points of user defined triangle

Pick three points to make a triangle

Oops!

Fill up a map rectangle with triangle fans of land and sea.

Find the 10 px quads partially within the circle

Pick a point and generate the planet, mass first.

Oops!

 So, haven't written...

Been a long week already, gotta work Saturday 

Finally

Back to finding quads within a circle to make a stupid polyhedron. Project a grid of quads 10 px or a thousand kilometers on a side. The edge quads are bigger, taller. The quads are subdivided into two triangles along and edge between the nearest corners.

stuff

Pick a point and generate the planet, mass first.

Oops!

There once was a silly old fool...

Who made world maps, of course.