Unigine::LeapMotion::Bone Struct
| Header: | #include <LeapMotionInterface.h> |
Notice
LeapMotion plugin must be loaded.
This structure represents a bone of a finger and has the following set of properties:
| type | Bone type. One of the Bone::TYPE_* values. |
| length | Length of the bone, in meters. |
| witdh | Width of the bone, in meters. |
| is_valid | Indicates whether the bone contains valid tracking data (1). |
| prev_joint | Coordinates of the end of the bone, closest to the wrist (proximal). |
| next_joint | Coordinates of the end of the bone, closest to the finger tip (distal). |
| center | Coordinates of the center of the bone. |
| direction | Normalized direction of the bone from wrist to tip. |
| basis | Orthonormal basis vectors for the bone as a Matrix. Basis vectors specify the orientation of the bone:
The bases provided for the right hand use the right-hand rule; those for the left hand use the left-hand rule. Thus, the positive direction of the x-basis is to the right for the right hand and to the left for the left hand. You can change from right-hand to left-hand rule by multiplying the z basis vector by -1. You can use the basis vectors for such purposes as measuring complex finger poses and skeletal animation. Notice
Converting the basis vectors directly into a quaternion representation is not mathematically valid. If you use quaternions, create them from the derived rotation matrix not directly from the bases. |
Notice
The Bone structure is declared as follows:
All coordinates are relative to the origin of the Leap Motion coordinate system.
Source code (C++)
struct Bone
{
int type;
float length;
float width;
int is_valid;
Unigine::Math::vec3 prev_joint;
Unigine::Math::vec3 next_joint;
Unigine::Math::vec3 center;
Unigine::Math::vec3 direction;
Unigine::Math::mat4 basis;
};Last update: 2018-08-10
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