# Visualize direction of weakness

**URL:** <https://forum.itascainternational.com/t/visualize-direction-of-weakness/2070>\
**Category:** FLAC3D\
**Tags:** tips\
**Created:** [May 7, 2025, 1:06pm UTC](https://forum.itascainternational.com/t/visualize-direction-of-weakness/2070 "2025-05-07T13:06:05Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![JuDi](https://avatars.discourse-cdn.com/v4/letter/j/7993a0/32.png) [@JuDi](https://forum.itascainternational.com/u/JuDi)\
**Post date:** [May 7, 2025, 1:06pm UTC](https://forum.itascainternational.com/t/visualize-direction-of-weakness/2070/1 "2025-05-07T13:06:05Z")

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Is it possible to visualize the direction of weakness in a plot when applying the ubiquitous-joint model?  
I help myself currently with visualizing a cutting plane. but are the dip direction and dip convention of cutting planes in a plot following the same convention as setting up the  
zone property dip [dipping] dip-direction [direction] ?

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**Author:** ![cheng](https://avatars.discourse-cdn.com/v4/letter/c/ecccb3/32.png) [@cheng](https://forum.itascainternational.com/u/cheng)\
**Post date:** [May 8, 2025, 3:56pm UTC](https://forum.itascainternational.com/t/visualize-direction-of-weakness/2070/2 "2025-05-08T15:56:46Z")

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Yes, the cut-plane follows the same convention as the dip and dip-direction setting in the ubiquitous-joint model.

We can write and run a small FISH function to define user-defined vectors at zone centroids and their directions are along the zone ubiquitous joint normal directions:

```auto
fish define ubiDir
    loop foreach local z zone.list
        if zone.model(z) == "ubiquitous-joint"
            local zp = data.vector.create(zone.pos(z))
            data.vector.value(zp) = zone.prop(z,"normal")
        endif
    endloop
end
[ubiDir]

```

then plot **User Defined Data** → **Vectors** , In the plotitem attribute tag set **Draw As** “ **Disks** ” rather than **Arrows** :

 ![a](https://canada1.discourse-cdn.com/flex031/uploads/itasca/original/2X/8/87b1690d8b550bbd53b203ff08bd0a02591097be.png)

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**Author:** ![JuDi](https://avatars.discourse-cdn.com/v4/letter/j/7993a0/32.png) [@JuDi](https://forum.itascainternational.com/u/JuDi)\
**Post date:** [May 9, 2025, 6:45am UTC](https://forum.itascainternational.com/t/visualize-direction-of-weakness/2070/3 "2025-05-09T06:45:16Z")

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Nice! Thank you, will give that a go.