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Warning! This version of documentation is OUTDATED, as it describes an older SDK version! Please switch to the documentation for the latest SDK version.
Warning! This version of documentation describes an old SDK version which is no longer supported! Please upgrade to the latest SDK version.

Unigine::Plugins::LeapMotion::Finger Struct

Notice
LeapMotion plugin must be loaded.

This structure represents a finger of a hand. All coordinates are relative to the origin of the Leap Motion coordinate system.

The Finger structure is declared as follows:

Source code (C++)
struct Finger
{
	enum
	{
		TYPE_THUMB = 0,	 // The thumb 
		TYPE_INDEX = 1,	 // The index or fore-finger 
		TYPE_MIDDLE = 2, // The middle finger 
		TYPE_RING = 3,	 // The ring finger 
		TYPE_PINKY = 4,	 // The pinky or little finger 
		FINGER_NUM_TYPES,
	};

	int id;
	int type;
	float length;
	float width;
	int is_extended;
	int is_valid;
	Unigine::Math::vec3 tip_position;
	Unigine::Math::vec3 tip_velocity;
	Unigine::Math::vec3 direction;
	Unigine::Math::vec3 stabilized_tip_position;

	Bone bones[Bone::BONE_NUM_TYPES];
};

Elements of the array of bones of the finger can be accessed using Bone::TYPE_* values as indices.

struct Finger

Fields

  • enum TYPE -
    • TYPE_THUMB - thumb
    • TYPE_INDEX - index or fore finger
    • TYPE_MIDDLE - middle finger
    • TYPE_RING - ring finger
    • TYPE_PINKY - pinky or little finger
    • FINGER_NUM_TYPES - total number of finger types.
    For example, to specify the middle finger, write Finger::TYPE_MIDDLE.
  • int id - Identifier of the finger.
    Notice
    Finger IDs are assigned based on the hand ID. If a hand has an ID of "5", then its fingers are assigned IDs 50 to 55, ordered from thumb to pinky.
  • int type - Finger type. One of the Finger::TYPE_* values.
  • float length - Length of the finger, in meters.
  • float width - Width of the finger, in meters.
  • int is_extended - Value indicating if the finger is extended.
  • int is_valid - Value indicating if the finger contains valid tracking data.
  • Math::vec3 tip_position - Coordinates of the instantaneous position of the finger tip.
    Notice
    All coordinates are relative to the origin of the Leap Motion coordinate system.
  • Math::vec3 tip_velocity - Instantaneous velocity of the finger tip, in m/s.
    Notice
    All coordinates are relative to the origin of the Leap Motion coordinate system.
  • vec3 direction - Current pointing direction vector of the finger.
    Notice
    All coordinates are relative to the origin of the Leap Motion coordinate system.
  • Math::vec3 stabilized_tip_position - Coordinates of the finger tip position filtered and stabilized using velocity and past positions.
    Notice
    All coordinates are relative to the origin of the Leap Motion coordinate system.
  • LeapMotion::Bone[] bones - Array of bones of the finger. Elements of the array can be accessed using Bone::TYPE values as indices.
Last update: 2023-12-19
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