topic Re: Keying the values in Bifrost Forum

Keying the values

Xaia — Wed, 11 Mar 2020 16:52:07 GMT

Hi!

I was wondering if it possible to key the values in the graph? I would love to set some keys on the influence compounds but couldn't figure out how to do it.

Any ideas?

Best

Xaia

Re: Keying the values

Grahame_Fuller — Wed, 11 Mar 2020 17:32:21 GMT

Hi Xaia,

There is no direct way to key values in a Bifrost graph, but you have a couple of options:

Connect the values to the input node at the top level of the graph, and set keys in Maya. They will appear under Extra Attributes of the bifrostGraph node. This option lets you use all the tools you have in Maya for animation.
Connect the frame or seconds output of a time node to the x input of an evaluate_fcurve node, and edit the curve to drive the y output however you like. This option works only for a scalar values (float or double). It is a lot more fiddly than the first option, but it does keep everything in the graph if that is important in your case.

I hope that helps,

gray

Re: Keying the values

pixelmonk — Fri, 27 Mar 2020 12:01:16 GMT

how to you do #1? I created an extra attribute for an mesh for Emission Rate but I can't figure out how to promote it inside of Bifrost Graph. I added the mesh in the Graph and tried to use a Get_Property_Any and typed in the Attribute name but it doesn't work. The docs are really bad with regards to figuring out how to do these simple things. I feel in cases like this where Bifrost is a sandbox within Maya means you have to hack it to get it to work with things inside Maya. It's a detractor compared to Houdini.

Re: Keying the values

pixelmonk — Fri, 27 Mar 2020 14:15:05 GMT

actually I think I got it.

Re: Keying the values

wuhailu — Sat, 28 Mar 2020 04:17:07 GMT

Houdini is a finished software that has been in development for 20 years. Bifrost is still in the development stage, and comparison is not of much significance.

Re: Keying the values

ryanVQGVU — Tue, 09 Feb 2021 19:17:34 GMT

How did you do it? I'm in the same situation, and just want to drive density with an attribute.