hi Henderson,
In other news, another simple thing I was playing with from the tutorial pdf
is attached - but I was trying to realise how to make the (gh 1) in the
pdata deform reset to zero rather than be cumulative? Does it have to be
i would not do this to (gh). the attached script works cumulatively
because you reuse the old value of "p" from the previous frame and add a
random number to it. if you always start from the original p value, you
can achieve what you want.
for example:
(clear)
(define myob (build-sphere 20 20))
(with-primitive myob
; save original "p"
(pdata-copy "p" "p0"))
(every-frame
(with-primitive myob
(pdata-map!
(lambda (p p0)
(vadd (vmul (rndvec) (gh 1)) p0))
"p" "p0")))
i hope this answers your question.
best,
gabor
