Heya,
Here is a script that fills a flat contour with a net of squares. 
Here is a testing .blend file…
Script is ALMOST done - Im publishing its version 0.9.0 just get some C&C and ideas how to finalise it.
The script works with a mesh which is only a flat contour - a ring of verts lying in one and the same geometric plane.
What script does? -
For each contour selected:
- Makes a grid (NET) with appropriate size and using dX,dY… dX = dY = 0.5 (so far)
- Makes the necessary additional edges to cover the area of contour and covers it with faces
So far it is implemented in two different meshes (objects).
Here it is in pictures:
TO DO:
-
an interface to set-up parameters
-
Join the two meshes/objects so that faces REALLY cover the contour
-
Optimise the script where possible so pls dont criticise the algoritm… Any ideas for optimisation are welcome though
Known problems: -
It covers badly loooong & tiny parts of contour that go outwards. The tiny parts that go inwards are processed with a nice cuts of the NET
Example of the problem which is only theoretical cause while making a contour for terrains - it is quite rate that it has comb-like edges at one or more of its sections):
I’ve put a lot of effort to cover this type of sharp sections up to 1 times dX,dY… I thought it will work for N-times but… :evilgrin:
- Script works with contours that are NOT rotated. If the contour is rotated, a problems appears that two meshes cannot get sinhronized at location
I think something like this shall be used at the end of processing:
LX = LX+minX*math.cos(RY)
LY = LY+minY*math.cos(RX)
LZ = LZ-minX*math.sin(RY)+minY*math.sin(RX)
ob_Grid.setLocation(LX,LY,LZ)
ob_Grid.rot = ob.rot
ob_Grid.size = ob.size
It works perfect for rotation and size, but NOT for location! It is like this cause while making the second mesh (the NET) I use origin = minX,minY of the first one. Therefore, since the script works with local coordinates, if the original contour is rotated on X,Y and/or Z, some modification of NET location shall be done. BUT I want able to figure it our so far and my mind already has blocked soooo PLEASE, PLEASE, PLEASE… help on that relatively minor issue but an important one!!!
Thanks in advance!
Regards,
May be a re-work (if I figure out how) to show/hide dX,dY or NX,NY as per the toggle buttons dynamically but in PupBlock it is NOT possible! Here’s the interface in its default stage:
Perhaps I’d need to replace the Blender API functions fill() and triangleToQuad() by something more effective 
In that case, the additional edges needed for making faces at contour borders are only calculated but NOT included in the mesh at the end. Using current technology (fill + triangleToQuad) would mean that to include them into the NET will be equivalent to add all faces then delete them so tat ALL edges remain… and I found this more useless than helpful 