hi,
i'm trying to understand how to use pfunc's and bumped into a crash with
this script:
(clear)
(define pf (make-pfunc 'arithmetic))
(pfunc-set! pf (list 'operator "x"
'src "p"
'dst "p"
'constant .5))
(with-primitive (build-cube)
(pfunc-run pf))
if the operator does not exist fluxus crashes.
--
i would expect that the following pfunc scales the primitive by 5.
(pfunc-set! pf (list 'operator "mul"
'src "p"
'dst "p"
'constant 5))
although it does not do anything. it works if i change the constant from
"5" to "5."
--
if i understand it right, the constant cannot be a vector, only a float.
although it seems that this pfunc adds (vector 1. 1. 1.) to "p".
(pfunc-set! pf (list 'operator "add"
'src "p"
'dst "p"
'constant 1.))
--
i would like to add a new arithmetic operator "lerp" that linearly
interpolates between two pdata. i didn't see any arithmetic pfuncs that
operates on 'src, 'other, 'constant and 'dst at the same time, but this
would be needed for the interpolation. is this possible? or should i be
thinking about a new pfunc type instead?
best,
gabor
