Ralf Muschall <rmu### [at] t-onlinede> wrote:
: Unfortunately, scaling and taking the derivative
: (which is what creates the surface normal from the height)
: are not exchangeable.

  Are you sure?

by definition:

  d(a*f(x))/dx = a*d(f(x))/dx

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

Post a reply to this message