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01. Notes on creating motions for an app


    Notes on fade

When switching from one motion to the other within the same parameter, it happens as a slow progression rather than an abrupt jump between values.
This fade time is set to 1 second by default.
This way, the object transitions smoothly between the two values.
The settings for this fade value are not too obvious to the naked eye, so please be aware of any changes you make.


The table below shows a blinking motion, with motion A (open eye) is set up before adding the actual blink value.
It will go like this: Open eye, closed eye, open eye.
Note that between the open eye (A) and closed eye (B) there is a frame of a half-opened eye.

  0 f 15 f30 f
 モーションA
 1.0
100%
= 1.0
 1.0
75%
= 0.75
 1.0
50%
= 0.5
 1.0 
25%
= 0.25
 1.0
0%
= 0.0
 モーションB
 1.0
0%
= 0.0
 0.5 
25%
= 0.125
 0.0 
50%
= 0.0
 0.5
75%
= 0.375
 1.0 
100%
= 1.0
 A + B

実機での
表示
1.0 + 0.0
1.0
0.75 + 0.125
=  0.875
0.5 + 0.0
= 0.5
0.25 + 0.375
= 0.625
0.0 + 1.0
= 1.0
※説明のためにシンプルに表現しているので実際の値の推移とは異なる場合があります。

To achieve a more natural transition between motions, it is advised not to add any big movements on the first second of the timeline, unless you are okay with the head movement and body orientation to change abruptly when switching motions.
The following values need to be taken into consideration when creating motions.

Blinking
It might be controlled by an automatic-blink command in the app and look unnatural

[Solution 1] If the Fade effect is universal to all parameters, avoid creating a blinking eye motion within the first and last second.

[Solution 2] Manually change the Fade time for the eye parameters, introduced in the 2.0 update, to avoid clashing of fade values
                    from other motions.

Please refer to this page for basic information on Fade and how to use it in your animation project.

Arm Poses
It will look unnatural if the arms switch abruptly from one pose to the other.
[Solution] if, for example, the aim was to have the hand put on the hip, start with a pose where the arm is lowered and after one second, change the value for the arm to move up onto the hip.


    Start a motion while having All Parameters accounted for

Adding a keyframe at the very beginning for ALL of the parameters in an mtn file will ensure that it will override the one before it.
As shown below, you can Left Click + CTRL to instantly create a keyframe for all the parameters at any point on the timeline

          When exporting this motion to an .mtn file, select the option [Keyed Parameters] in the Parameter Items to be output.

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