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addpoint VEX function

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Bretislav Kaspar
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18 posts
Joined: May 2014
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Hi Guys,
I try this approach
When a circle (or curve) average segment length is greater than the target length a point is added in a random segment. The points then move to even out the spacing. This avoids the jittering and smoothing effects of an overall resample.

Any idea how to do this? In VEX use “addpoint”?

vector origin = {0,0,0};
int numpoints = npoints(0);

if (numpoints == 20){
addpoint(0,origin);
}

But how to place it on the random segment, and shift the points to even out the spacing?
Thanks.
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Konstantin Magnus
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670 posts
Joined: Sept. 2013
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Hi Kaspar,

I think the resample node can do all this. Anyways in VEX you would use the primuv() function for such thing.

// resamples curves in a prim wrangle
float seg_length = chf('segment_length');
float u_length = primintrinsic(0, 'measuredperimeter', i@primnum);

int steps = int( ceil(u_length / seg_length) );

for(int i = 0; i < steps; i++){
    vector st = set(i / float(steps - 1), 0.0, 0.0);
    vector pos = primuv(0, 'P', i@primnum, st);
    int pt = addpoint(0, pos);
}

removeprim(0, i@primnum, 1);
https://procegen.konstantinmagnus.de/ [procegen.konstantinmagnus.de]
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Bretislav Kaspar
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18 posts
Joined: May 2014
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Thanks a bunch Konstantin, It works, with a little tweak. Thanks.
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