LeapMotionBone Class
LeapMotionBone Class
Members
int getType()
Returns the type of the bone.Return value
Bone type. One of the LEAP_MOTION_TYPE_* values.float getLength()
Returns the length of the bone.Return value
Length of the bone, in meters.float getWidth()
Returns the width of the bone.Return value
Width of the bone, in meters.vec3 getPrevJoint()
Returns the coordinates of the end of the bone, closest to the wrist (proximal).Notice
All coordinates are relative to the origin of the Leap Motion coordinate system.
Return value
Coordinates of the end of the bone, closest to the wrist (proximal).vec3 getNextJoint()
Returns the coordinates of the end of the bone, closest to the finger tip (distal).Notice
All coordinates are relative to the origin of the Leap Motion coordinate system.
Return value
Coordinates of the end of the bone, closest to the finger tip (distal).vec3 getCenter()
Returns the coordinates of the center of the bone.Notice
All coordinates are relative to the origin of the Leap Motion coordinate system.
Return value
Coordinates of the center of the bone.vec3 getDirection()
Returns the normalized direction of the bone from wrist to tip.Notice
All coordinates are relative to the origin of the Leap Motion coordinate system.
Return value
Normalized direction of the bone from wrist to tip.vec3 getBasis()
Returns the orthonormal basis vectors for this Bone as a Matrix.
Basis vectors specify the orientation of a bone:
- X - Perpendicular to the longitudinal axis of the bone; exits the sides of the finger.
- Y (or up vector) - Perpendicular to the longitudinal axis of the bone; exits the top and bottom of the finger. Increases in the upward direction.
- Z - Aligned with the longitudinal axis of the bone. Increases toward the base of the finger.
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.
Return value
Orthonormal basis vectors for the bone as a Matrix.int isValid()
Returns a value indicating if the bone contains valid tracking data.Return value
1 if the bone contains valid tracking data; otherwise, 0.int LEAP_MOTION_TYPE_METACARPAL
Description
Metacarpal bone. A bone connected to the wrist inside the palm.int LEAP_MOTION_TYPE_PROXIMAL
Description
Proximal bone. A bone connecting to the palm.int LEAP_MOTION_TYPE_INTERMEDIATE
Description
Intermediate bone. A bone between the tip and the base.int LEAP_MOTION_TYPE_DISTAL
Description
Distal bone. A bone at the tip of the finger.int LEAP_MOTION_BONE_NUM_TYPES
Description
Total number of bone types.Last update: 2018-08-10
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