Auto Generation of Sway Motion

Updated: 09/12/2024

This function automatically generates the movement of swaying objects such as small objects and hair.
The degree of swaying can be adjusted from the dialog box while viewing the generated motion, streamlining the process of adding motion to swaying objects.

Supported sway types

The following two types of motion attachments are supported.

Hair swing	Drooping by angle Z

Creating complex sway movements that do not fall into these categories may not result in the intended movement.

This function also applies deformation to the warp deformer containing the ArtMesh of the area to be subjected to motion.
Motion attachment of sway using the rotation deformer is not covered by this function.

Auto generation of sway motion

Displaying the Settings dialog box

The following setting dialog box can be displayed in the [Modeling] menu -> [Parameter] -> [Auto generation of sway motion].

Number	Item	Description
(1)	Deformer list	Displays a list of registered warp deformers. The warp deformer selected here is the target of the sway deformation.
(2)	Register warp deformer	Register the warp deformer selected in the Modeling View to the list.
(3)	Parameter	Select the parameter that is the target of the sway deformation.
(4)	Synchronize selections with parameter palette	When checked, the parameter selection of this dialog box synchronizes with that in the parameter palette.
(5)	Estimation type	Estimates the appropriate sway setting value for the deformer and changes the sway setting. You can choose between two types of estimation: [Hair sway] and [Generate droop by angle Z].
(6)	Position of fulcrum	The position of the fulcrum of the sway can be changed. You can choose from four settings: [Top], [Bottom], [Right], and [Left].
(7)	Flip sway horizontally based on the fulcrum	If checked, flips the direction of the generated sway horizontally based on the fulcrum.
(8)	Adjustment of sway settings	Adjust the degree of deformation of the sway. Descriptions of each setting value are given below.
(9)	Synchronize left and right setting values	When checked, the setting values of the keyform on the left side and the keyform on the right side of [Adjustment of sway deformation] are synchronized. It is checked by default. Uncheck this checkbox if you want to create asymmetrical sway deformations.
(10)	Automatically update keyforms when setting values are changed	If checked, the keyform is automatically updated each time the setting values are changed. It is checked by default.
(11)	Update keyforms	Clicking the [Update keyforms] button actually updates the keyform by calculating the shape of the sway deformation from the current settings.

Operating procedure

1. Select the deformer to which you want to add the sway motion in the view and click [Register warp deformer] from the dialog box to register it in the deformer list.

2. Select the parameter to which you want to add sway motion from the parameter combo box.

3. Select [Estimation type] from Estimation of sway setting value.

4. In [Sway settings], slide the bar to change the setting value.
After making changes, click [Update keyforms] to reflect the sway deformation in the keyform.

If the [Automatically update keyforms when setting values are changed] checkbox is checked, the keyforms will be automatically updated when settings are changed.
This is a non-modal dialog box, so you can adjust the sway deformation while manipulating parameters and views in the main window to check the motion.

Multiple deformers can also be set at the same time.
If the selected deformers have different values for the sway settings, the first deformer’s value is displayed in green.

Right-click menu

Right-click on [Default list] to display the following menu.

Item	Description
Synchronize selections with views	If checked, the selection state is synchronized between the setting dialog box and the canvas.
Display	Changes the display type of the list. By checking the checkbox, you can set whether the object is displayed by “Name” or “ID.”
Copy settings	Copies the settings in [Sway settings] of the selected object.
Paste settings	Paste the contents copied in [Copy settings] into the selected object.
Delete settings	Removes settings related to the auto generation of sway motion for the selected object. Objects whose settings have been deleted will disappear from the default list.

Effect of each setting value in adjusting sway settings

Number	Item	Description
(1)	Magnitude of sway (horizontal)	Sets the magnitude of the horizontal oscillation.
(2)	Magnitude of sway (vertical)	Sets the magnitude of the vertical oscillation. If the value is set lower than 0, movement can be applied as if it is being pulled downward.
(3)	Softness	Adjusts swaying of the upper and lower parts of the deformer. If the value is increased, the upper part will almost stop moving and only the lower part will sway.
(4)	Zoom in/Zoom out	Deformations can be made to increase or decrease the width of the deformer. Larger than 0 means expansion, and smaller than 0 means contraction.

About AI Technology

In this function, AI technology is used to estimate a reasonable amount of deformation based on information such as the position and size of the target deformer.

Among the works submitted to “nizima,” those for which we have received permission to use them in AI research are used as learning data.
For more information, see the “Live2D AI Research Policy and Request for Cooperation.”