Loading and Saving BIP Animation

Biped motion (BIP) files have a .bip file name extension. They save all information about biped motion: footsteps, keyframe settings including limb rotation, the scale of the biped, and the active gravity (GravAccel) value. IK Blend values for the keys and Object Space settings are also saved.

IK objects, props and other objects in the scene can also be saved with the BIP file.

There are several ways to create or acquire .bip files:

When you save a Motion Mixer (MIX) file or a Motion Flow Editor (MFE) file, the paths to the referenced BIP files are also saved. If these paths are broken (for example, if the BIP files have been moved or renamed), a Missing Motion Mixer Files dialog or Missing Motion Flow Files dialog, respectively, opens listing the missing files. To rectify this, open the Asset Tracking dialog and set a new path for the files.


To load biped motion from an existing BIP file:

  1. Select the biped you want to animate, and go to the Motion panel.
  2. On the Biped rollout, make sure you are not in Figure mode, and click (Load File).
    NoteWhen Figure mode is active, the Load File option loads figure (FIG) files. Anything done in Figure mode changes the basic shape and structure of the biped. When Figure mode is turned off, the Load File tool loads BIP files, which animate the figure.
  3. In the file dialog, choose the BIP motion file to load, and then click OK.
  4. The biped repositions itself in the scene, as it assumes the initial position of the animation file. You might need to use Zoom Extents to see the biped after it is repositioned.
    TipThe Biped keyboard shortcut Alt+R sets the animation range to that of the currently selected biped. Since the length of the animation can change after loading a BIP file, this keystroke can be useful. To use it, make sure that the Keyboard Shortcut Override Toggle is active.

To save animation you have created or imported to a BIP file:

  1. Animate the biped with footsteps or freeform animation (or both).
  2. Select the biped that has the animation you want to save, and go to the Motion panel.
  3. On the Biped rollout, make sure you are not in Figure mode, and click (Save File).
  4. In the file dialog, enter a name for the motion file, and then click OK.