Hiding a specific instance

General TouchDesigner Discussion
#1

If my Evaluate DAT x or z values feeding my Geo COMP (tx or tz in the attached image) are equal to 0.0, I need to hide just that instance.

I tried targeting the DAT with an expression from elsewhere to change the x, z values but get an error saying The operator is not editable

Is there any way of hiding an instance other than via the DAT feeding your geo COMP?

x_z_instance
x_z_instance996×250 44.9 KB

#2

Instances now have an active flag - you can use that to hide them.

1 Like
#3

Thanks but unless I am creating my instances incorrectly, puzzled how you might target a specific instance. RenderPick CHOP or?

#4

@art3mis

Take a look here. Notice that as you change the value in the table - changing that from 0 to 1 for an instance that it turns on:

active-flag
active-flag613×578 186 KB

base_instancing_active.tox (990 Bytes)

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#5

Great. thank you. Couldn’t find anything in the documentation.

#6

I tried to redo this with my test network, but active doesn’t work there.
flaggingActive.tox (8.3 KB)

Your example works fine.

What do I miss ?

image
image1758×779 89.7 KB

#7

@julien seems like the Line MAT can’t handle this.
I replaced it with a Constant MAT and then it’s working fine.
base-constant.tox (2.8 KB)

1 Like
#8

Thanks a lot.
Yes it works fine with constant, with phong too.