init(controlPoints:_:_:_:)
Returns an initialized timing function modeled as a cubic Bézier curve using the specified control points.
Declaration
init(controlPoints c1x: Float, _ c1y: Float, _ c2x: Float, _ c2y: Float)Parameters
- c1x:
A floating point number representing the x position of the c1 control point.
- c1y:
A floating point number representing the y position of the c1 control point.
- c2x:
A floating point number representing the x position of the c2 control point.
- c2y:
A floating point number representing the y position of the c2 control point.
Return Value
An instance of CAMediaTimingFunction with the timing function specified by the provided control points.
Discussion
The end points of the Bézier curve are automatically set to (0.0,0.0) and (1.0,1.0). The control points defining the Bézier curve are: [(0.0,0.0), (c1x,c1y), (c2x,c2y), (1.0,1.0)].