In article <3a04ed21@news.povray.org>, "Mark Wagner" 
<mar### [at] gtenet> wrote:

> "all" makes more sense than "grey".

That is what I finally implemented it as. It took me a while to figure 
out how to allow rgb, red, green, and blue to be used, though.


> The limit is 256 points -- enough for most uses, but why have a limit 
> when there doesn't need to be one?

It looks to me like that was just a stopgap measure...it looks like you 
could implement it mostly by adding code to the Insert_Spline_Entry() 
function.
I don't have any experience with growing dynamically allocated 
arrays...I tend to use linked lists for everything.


> >Also, it would be useful if you could access the control points, with
> >functions that behave similar to the array functions and an array-like
> >syntax.
> This might be very difficult to implement -- there are enough 
> problems with the spline syntax as it is.

I think could get it working with functions, but I have no idea how to 
do the array like syntax...
INT spline_points(SPLINE_IDENT) Retrieves the number of points in the 
spline.
EXPRESS get_spline_point(INT_INDEX) Returns the corresponding point on 
the spline.

BTW, I implemented the SPLINE_IDENT(T, TYPE) syntax. You can now do 
something like this:
#declare Spl = spline {linear_spline ...}

#declare Val1 = Spl(T);
#declare Val2 = Spl(T, cubic_spline);
#declare Val3 = Spl(T, quadratic_spline);

I will send you the code soon.

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

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