Movement between changing borders

[Veit]

I am trying to create a rnd-sample process with a tightening range of material.

 

For example: (rnd-sample 50  (gen-integer 50 60) )

-> it should start with sampling from the full range between 50 and 60, but tightening the range until at the last sample only chosing from material between 54 and 56

 

Maybe I could somehow map the sampled material to 2 vectors, a rising linear function and a falling one? Or get the range between 2 functions? I am kind of lost here, sorry if the answer is obvious

 

 

[Stephane Boussuge]

Hi;

 

here's a possible solution:

 

(progn
 (setf noise (gen-noise 50 :seed 425))
 (setf env1 '(50 51 52 53 54))
 (setf env2 '(60 59 58 57 56))
 (list-plot (vector-to-envelope2 env1 env2 noise))
 )

S.