CurlNoise + Vex Help :(

[Teteerck]

Hi there! Houdini noob here ^^ 

Some days ago I found this image on the internet and I really liked it so I thought about trying to replicate it but maybe animating it hehe to me it seemed like it could be made using curl noise fields so I followed the entagma's vex 101 tutorial and I manage to make this little animation as a test, and I really liked it. I think is pretty close to the image, BUT i have 2 issues with it that i don't really know how to fix or adjust a little, so i was wondering is maybe some of you guys could help me a bit or at least guide me to the right path.

https://imgur.com/a/wyg2zMS

First: Looping it, is it possible to loop The curlnoise or the curlxnoise? Or is there any other noise function that would produce a similar result but easier to loop

Second: Is there any way to soften the curlnoise behavior in these spots? https://imgur.com/a/rLB40Hf

 My best idea so far i just placing the camera in a place where these intersections aren't in frame haha but would love to know if it's possible at least to make those somewhat less dramatic?

 

CurlNoiseTest_v1.hip

Edited January 17, 2021 by Teteerck

[Atom]

You could call the more extended version of curl noise directly. There is a periodic version that might help with the tiling. You need to include the voplib.h to access these extended functions, which are basically what VOPs wraps.

vector freq = chv("Frequency");
vector off = chv("Offset");

#include <voplib.h>
vector noise = vop_curlNoiseVP(@P, freq, off, { 0, 0, 0 }, "pnoise", "", 3, 0, 1, 0.5, 1, 1, 1, 0.0001);

// Laydown along an axis.
v@N = cross(noise,{0,0,1});

 

[Librarian]

Run Over Numbers I like It make some Noise  ,Have Fun @Teteerck

float height(vector p; float f; float a){
        return a *anoise(p*f,3,0.1,1);
        
        }
float dim = sqrt(@numelem);
 float f = 0.1;
 float a = 0.2 *dim;
 
 vector cur_p;
 
 cur_p.x = @elemnum% dim;
 cur_p.z = @elemnum/ dim;
 cur_p.y = height(cur_p,f,a);
 
 if (cur_p.x < dim -1 && cur_p.z <dim-1){
      
        
        vector next_p1;
        next_p1.x = (@elemnum+1)% dim ;
        next_p1.z = (@elemnum+1)/ dim ;
        next_p1.y = height (next_p1.y,f,a);
        float slopex = ( next_p1.y -cur_p.y)/(next_p1.x-cur_p.x);
        
        vector next_p2;
        next_p2.x = (@elemnum+1)% dim ;
        next_p2.z = (@elemnum+1)/ dim ;
        next_p2.y = height (next_p2.y,f,a);
        float slopez = ( next_p2.y -cur_p.y)/(next_p2.x-cur_p.x);
        
        vector n = set (slopex, 0, slopez);
        
        
        setpointattrib (0,"N",0,n);
        addpoint (0,cur_p/(dim-1));
        }

 

[Teteerck]

On 1/17/2021 at 7:12 PM, Atom said:

You could call the more extended version of curl noise directly. There is a periodic version that might help with the tiling. You need to include the voplib.h to access these extended functions, which are basically what VOPs wraps.

vector freq = chv("Frequency");
vector off = chv("Offset");

#include <voplib.h>
vector noise = vop_curlNoiseVP(@P, freq, off, { 0, 0, 0 }, "pnoise", "", 3, 0, 1, 0.5, 1, 1, 1, 0.0001);

// Laydown along an axis.
v@N = cross(noise,{0,0,1});

 

Wow, thank you so much for the help! I ended up doing something similar just using a mountain node and i think i managed to do almost exactly what i wanted but i still looking how to loop it. I'm trying the blendshape node for that.

 

I tried this vex and loved the result! I didn't know about the extended noise functions, thank you again!

[Teteerck]

On 1/18/2021 at 12:10 AM, Librarian said:

Run Over Numbers I like It make some Noise  ,Have Fun @Teteerck

float height(vector p; float f; float a){
        return a *anoise(p*f,3,0.1,1);
        
        }
float dim = sqrt(@numelem);
 float f = 0.1;
 float a = 0.2 *dim;
 
 vector cur_p;
 
 cur_p.x = @elemnum% dim;
 cur_p.z = @elemnum/ dim;
 cur_p.y = height(cur_p,f,a);
 
 if (cur_p.x < dim -1 && cur_p.z <dim-1){
      
        
        vector next_p1;
        next_p1.x = (@elemnum+1)% dim ;
        next_p1.z = (@elemnum+1)/ dim ;
        next_p1.y = height (next_p1.y,f,a);
        float slopex = ( next_p1.y -cur_p.y)/(next_p1.x-cur_p.x);
        
        vector next_p2;
        next_p2.x = (@elemnum+1)% dim ;
        next_p2.z = (@elemnum+1)/ dim ;
        next_p2.y = height (next_p2.y,f,a);
        float slopez = ( next_p2.y -cur_p.y)/(next_p2.x-cur_p.x);
        
        vector n = set (slopex, 0, slopez);
        
        
        setpointattrib (0,"N",0,n);
        addpoint (0,cur_p/(dim-1));
        }

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hi! Thank you so much for your help! I copied this code but I wasn't capable of making it work properly, should I just copy and paste? looking forward to seeing this in action. Thank you again so much!

[Librarian]

@Teteerck just copy paste wrangle OVER numbers 

Have Fun
 

ODiN.hiplc