Gesture Editor

(Original Author: Dr. Jing HUANG)

This page shows the module about GestureEditorModule in Greta System.
It is used to build your proper Gestures (then defining in XML file).

Structure

• Arm position defines the gesture arm position by Symbolic value in gesture space.
• Hand Shape defines the hand shape key frame which is already defined in library.
• Hand Orientation defines the hand orientation by using different combination of directions.
• Curve Trajectory defines the trajectory for arm gesture by adding new key frames on the path.
• Expressive parameter defines the expressivity that can influence the variation of a whole gesture.

Arm position

the gesture space using symbolic representations in 3 dimensions by McNeill sectors

• X: XEP, XP, XC, XCC, XOppC
• Y: YUpperEP, YUpperP, YUpperC, YCC, YLowerC, YLowerP, YLowerEP
• Z: ZNear, ZMiddle, ZFar

Expressive parameter

We define the expressivity as the manner of executing the gestures
We have modulated the quality of body movements by a set of expressivity parameters
We group these parameters into 3 sets:

• Gesture Volume controls the spatial variation of gestures;
• spatial parameter controls the variation of McNeill's sectors
• openness parameter changes the gesture form (elbow space) in IK
• Sequential Variation controls the time based variation;
  • Power uses various easing in-out functions

• Power Variation allows us to further control the dynamism of these movements.
  • Power also changes the postures. It means that a larger value of power influences more body parts.