In article <3a07969c@news.povray.org>, "Mark Wagner" 
<mar### [at] gtenet> wrote:

> Update: I implemented it today.  For unknown reasons, POV_REALLOC doesn't
> work properly for this.  I'm using Borland C++ Builder 4.0, if that makes
> any difference.

I've never used POV_REALLOC()(or realloc())...maybe it is a bug in the 
pov_realloc() function. Did you get it working with realloc(), or did 
you try some other way?


> #declare Spl[2].t = 0.4; // Sets the t value

I think f and t are already reserved for filter and transmit...you would 
have to use something else.


> Arrays of splines would be treated as multi-dimensional arrays, with the
> last dimension being the spline index.

This probably would work...it certainly looks simpler and cleaner than 
my syntax, though a bit less clear in some rare circumstances.
How about a similar syntax for getting textures, pigments, colors, etc. 
from blend maps?


> 2) Cubic interpolation is not done properly.  It appears that the 
> "cubic interpolation" is actually done by averaging two quadratic 
> interpolations of the spline data.  Fixing this will result in minor 
> changes to all scenes that use cubic splines.

These definitely need fixing...
Hmm, another thing that would be nice is a larger assortment of spline 
types. Catmull-rom, b-splines, etc...
Keep up the good work.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

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