CircleGesture¶

Notice Gestures are deprecated in version 3.0 and may not behave the same as they did in earlier versions.

Methods:

class Leap::CircleGesture

The CircleGesture classes represents a circular finger movement.

Public Functions

Vector center() const

The center point of the circle within the Leap Motion frame of reference.

Leap::Vector centerPoint = circle.center();

Return

Vector The center of the circle in mm from the Leap Motion origin.

CircleGesture()

Constructs a new CircleGesture object.

An uninitialized CircleGesture object is considered invalid. Get valid instances of the CircleGesture class from a Frame object.

CircleGesture(const Gesture & rhs)

Constructs a CircleGesture object from an instance of the Gesture class.

if(gesture.type() == Leap::Gesture::TYPE_CIRCLE){
    Leap::CircleGesture circleGesture = Leap::CircleGesture(gesture);
}

Parameters

• rhs -

  The Gesture instance to specialize. This Gesture instance must be a CircleGesture object.

Vector normal() const

Returns the normal vector for the circle being traced.

std::string clockwiseness;
if (circle.pointable().direction().angleTo(circle.normal()) <= Leap::PI/2) {
    clockwiseness = "clockwise";
}
else
{
    clockwiseness = "counterclockwise";
}

Return

Vector the normal vector for the circle being traced

Pointable pointable() const

The finger performing the circle gesture.

Leap::Pointable circlePointable = circle.pointable();

Return

Pointable A Pointable object representing the circling finger.

float progress() const

The number of times the finger tip has traversed the circle.

float turns = circle.progress();

Return

float A positive number indicating the gesture progress.

float radius() const

The radius of the circle.

float diameter = 2 * circle.radius();

Return

The circle radius in mm.

Public Static Functions

Type classType()

The circle gesture type.

if(gesture.type() == Leap::CircleGesture::classType()){
    Leap::CircleGesture circleGesture = Leap::CircleGesture(gesture);
}

Return

Type The type value designating a circle gesture.