[GRASS-dev] New directional buffering module or modified v.buffer

[Trevor Wiens]

On Wed, 14 Mar 2007 13:55:15 -0700
Dylan Beaudette wrote:

> On Wednesday 14 March 2007 13:00, Trevor Wiens wrote:
> > I posted a question some time ago about directional or differential
> > buffering. I've managed to resolve my bugs and am now unsure what is the
> > best way to incorporate this code back into GRASS. I assume it is
> > desirable as I assume others may find it useful from time to time.
> 
> Hi Trevor. Can you elaborate on what was causing the 'spikes' in your 
> previously posted version?
> 

There were two problems, one related to a sign issue in my own
code. The second related to inserting segments to round
corners when there is a change in direction. The buffer.c
Vect_line_buffer code inserts an additional point and then re-inserts
the starting point to close the polygon. I wasn't able to grok its
location calculation so by simply commenting out the problem went away.
It doesn't appear to cause any problems when inspecting the results
visually.

T
-- 
Trevor Wiens 
twiens at interbaun.com

The significant problems that we face cannot be solved at the same 
level of thinking we were at when we created them. 
(Albert Einstein)