Re: [Plplot-devel] Wish list for the release

[Alan W. I. <ir...@be...>]

On Sat, 15 Dec 2001, Maurice LeBrun wrote:

> When I looked into this last spring (fixing several bugs in the process), I
> concluded we might be better off with a new algorithm.  The original algorithm
> only follows lines, not regions.  If one endpoint of the line is hidden but
> the other is not, it merely calculates the intersection point and draws from
> that point.  Extending this to 2D and getting it right does not look easy to
> me.  The existing shade extension is clever but I found the boundary
> conditions too messy to be able to make solid headway without considerable
> effort.

Maurice, I am having trouble interpreting your words here since the previous
posts in this thread discussed both 2D and 3D shading which have separate
algorithms.  I believe (although I am not sure) that part of your paragraph
may refer to a better algorithm for the 2D shading (which might be a good
idea, but there is currently no bug in that case), and part of the paragraph
to 3D shading (which does have a bug). Could you please clarify?  I am
particularly interested in whether you think a new 3D shading algorithm is
required to fix the 3D shading bug.  If so, I will drop it from the release
wish list.

Alan