[Gridflow-dev] [Gridflow-cvs] [cvs] base: fix for #rotate (thanks claude)

[Claude Heiland-Allen]

Hi all,

In the (short!) time between reporting the bug and matju's fix, I made a 
replacement for the important part of [#rotate]:

angle (0..36000)    scale (default 256)
  |                   |
[#2d_angle_to_rotation]
  |
rotation matrix (Dim[2,2])

The attached help patch shows an example of usage, you can switch 
between [#rotate] and the replacement.  The replacement is slightly[~] 
faster, as the prescaling is performed on the 2x2 rotation matrix rather 
than on the incoming coordinates.

I will try to revive my hypercube patches soon (probably after Make 
Art), so expect [#3d_angle_to_rotation] and [#4d_angle_to_rotation] 
then.  I remember feeling a lack of a [#draw_polygon_outline] or 
[#draw_line] when I made the original, but maybe I can think of a more 
interesting way of rendering than just edges.


[~] 10% of my Athlon XP 1600+ rotating 4x 512x512x2 per second with 
./configure --debug --debug-harder


Claude
-- 
http://claudiusmaximus.goto10.org
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