/**
 * A bone joint of VRMCSpringBone.
 */
export interface SpringBoneJoint {
  /**
   * The node index.
   */
  node: number;

  /**
   * The radius of spring sphere.
   */
  hitRadius: number;

  /**
   * The force to return to the initial pose.
   */
  stiffness: number;

  /**
   * Gravitational acceleration.
   */
  gravityPower: number;

  /**
   * gravityDir
   */
  gravityDir?: [number, number, number];

  /**
   * Air resistance. Deceleration force.
   */
  dragForce: number;

  extensions?: { [name: string]: any };
  extras?: any;
}