Info

An addon for Blender 2.79 to get the <helper> & <trigger> for Source's $proceduralbones. Modified from SourceOps.

Usage

1. Select an armature.
2. Set AoI (default is 90).
3. Set scale (default is 1) if you use $scale. This affects <basepos> since $scale does not work on $proceduralbones.
4. Pick a controller bone from the list.
5. The active bone in pose mode is the helper bone.
6. Click the buttons to copy the <helper> & <basepos> or <trigger> line and paste into your .vrd file.