1. RE: SV: pathing.
Personally, I think b-spline produces a nicer curve than Bezier. The
math isn't as elegant, but the result is better.
Colin Taylor
OthelloVivaldi at hotmail.com wrote:
>
> Colin,
>
> Vega.e is just beautiful. The explode_spline() routine was much faster
> than my Bezier curve. When drawn on a pixel screen, the two curves
> almost exactly overwrite each other. The following compares the two
> routines (numbers in seconds on a 350MHz PII, code is appended below):
>
> Spline BB_graph
>
> 0.660000 1.040000
> 0.660000 1.100000
> 0.710000 1.050000
> 0.710000 1.100000
> 0.770000 1.040000
>
> In addition to this, your 'splines' can also deal with any number of
> coordinates as input, not just 4 points. I take my hat off.
>
> To improve on this, I guess one would have to look for some way to do it
> with only integers. Hmmmmm...
>
>
> -- Test code:
>
> include vega.e
> include bb_graph.e
>
> sequence s, p
> constant WH = {800, 600}, NUM = 100, RESO = 1000
> constant TEST_SET = rand(repeat(repeat(WH, 4), NUM)) - 1
> atom t
> set_curve_res(RESO)
> puts(1, "\nSpline\t\tBB_graph\n\n")
> for k = 1 to 5 do
> t = time()
> for j = 1 to NUM do
> p = TEST_SET[j]
> s = explode_spline(p)
> end for
> t = time() - t printf(1, "%f\t", t)
> t = time()
>
> for j = 1 to NUM do
> p = TEST_SET[j]
> s = Bezier_curve(RESO, p[1], p[2], p[3], p[4])
> end for
> t = time() - t printf(1, "%f\n", t)
> end for
>
>
> Yours Sincerely,
> Barabarella
>
>
