Nonlinear texture stretching

[Vol46]

Hello all!

Is there a way to stretch the texture non-linearly when the object is deformed? Let the texture be applied to the sphere (figure 1). As the sphere grows, the texture stretches uniformly. 

How to make so that only gray sections of the texture are stretched, and the red ones do not change  (or stretch a little) ( as in figure 2 )?

[Aizatulin]

Hi,

probably there are simpler ways, but here are some ideas:

• split your points using the uv coordinates
• convert uv to points (@P)
• isolate red color (delete rest) -> each square should be connected component
• calculate centroids for each connected component (here it is better to work on flat geometry (uv-space))
• use nearpoint to get every point closest cluster center (from all points)
• set scale dependent float attribute (average distance to neighbour for example)
• rescale by this attribute towards center

 

 

uv_scale_test.hipnc

[Noobini]

i don't  quite know how to do it UVly....but geometricly/visually...not that hard.

adjust uniform scale in transform1

 

vu_sphere.hiplc

[Noobini]

so i thought, instead of merge, why not boolean ?

 

vu_sphere2.hiplc

[Vol46]

Thanks to all!