guo li

guoli

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LOCATION
gaozhou, China
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Houdini Skills

BEGINNER
Procedural Modeling  | Character Rigging  | Animation

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Recent Forum Posts

Asking the experts about Apex's ifbegin issue Sept. 16, 2026, 12:14 a.m.

AntonMoss
guoli
Really feel embarrassed, recently I’ve been asking the most questions on the forum, probably because I’m the dumbest.

I made a small scene and want A to move toward B by one unit, like 0.1cm or so. When reaching a set distance condition, B would move or rotate.

I know Apex has ifbegin, but I’ve been messing around for a long time and still don’t know how to use it properly.

Oh, I’m a bit of a dummy, so I’m coming to ask you guys!

It would be great if you can provide a file.

Thanks, everyone.

I wouldn't use an ifbegin for this particular task. Check out the attached example. You can use the local xform fit method(the method used in the file), or measure the distance between the 2 joints, or use the new set-driven key functionality.
Image Not Found



Also, have you noticed that set-driven key is too slow? In slightly more complex scenes, it can take 5 minutes to respond to a click, and the scene lags too.

Asking the experts about Apex's ifbegin issue Sept. 15, 2026, 10:43 p.m.

AntonMoss
guoli
Really feel embarrassed, recently I’ve been asking the most questions on the forum, probably because I’m the dumbest.

I made a small scene and want A to move toward B by one unit, like 0.1cm or so. When reaching a set distance condition, B would move or rotate.

I know Apex has ifbegin, but I’ve been messing around for a long time and still don’t know how to use it properly.

Oh, I’m a bit of a dummy, so I’m coming to ask you guys!

It would be great if you can provide a file.

Thanks, everyone.

I wouldn't use an ifbegin for this particular task. Check out the attached example. You can use the local xform fit method(the method used in the file), or measure the distance between the 2 joints, or use the new set-driven key functionality.
Image Not Found



牛逼!!Thanks, expert!

Asking the experts about Apex's ifbegin issue Sept. 15, 2026, 1:03 p.m.

Houdini 22.0.429 and later versions seem to have removed this feature. If there are a lot of nodes, it's hard to find the target node you need.