Wookey wrote: > That example (scrap bmb2_s3) has a streamway with sandbanks. Having got the > large water area to work, I find that some of the sandbanks are sandy, but > some are covered in water. What determines when an area follows the outer > wall, or the sandbank border? IS the only way to be sure to get the right > thing to split the wall at the sandbank?
When I have to draw something like this, I draw one border curve that goes behind the wall on those places, where wall is areas active border. In the output, such border and area are clipped by walls. > This gets back to the problem that making changes to line which surround > areas is problematic - if you split a line that is part of an area then both > lines losetheir IDs and the area breaks. This is a tricky problem, but what > you really want is for the areas and lines to get re-written so they all > still work. May be in the future it will be neccessary, but again - every time I draw area that should be surrounded by walls also, I just let it overlap walls and in the output this are will be clipped correctly. Regards, S.
