Pathline (vf3d) stay in place?


#1

how can a noise field be sampled over the same n points instead of advancing by stepsize ?


#2

ok i see its more complicated btw stream- streak- path- time-lines,
what im after is the grass in wind analogy, not sure which one of the above makes a case for it


#3

Not sure that you want any of the Field Line nodes (streak, stream, path). From your description sounds more like a job for FieldSample


#4

tried the fieldsample but result is pure “wind”, looks like im missing an operation, i need to multiply the “wind” field to the “grass” buffer ? (sorry for vulgar analogy )


#5

Right idea, I would think you’d rather want to add them though…
Try SimpleOperation from noodles and you can see what both do.


#6

@ggml And? Did that work for you?


#7

windgrass.v4p (47.2 KB)
seems so, adding the field and using inputmorph to keep the lines clamped to ground

is the pathline only computable step-by-step ?