iOS & macOS Charting Documentation - SciChart iOS & macOS Charts SDK v4.x

SCIBezierCurveInterpolator

@interface SCIBezierCurveInterpolator : NSObject

Helper class which allows to interpolate value for cubic bezier curve.


                        
                        
                        start

The start point of the bezier curve.

Declaration

Objective-C

@property (nonatomic) CGPoint start;

Swift

var start: CGPoint { get set }

a
The a control point of the bezier curve.
Declaration
Objective-C

@property (nonatomic) CGPoint a;
Swift

var a: CGPoint { get set }
b
The b control point of the bezier curve.
Declaration
Objective-C

@property (nonatomic) CGPoint b;
Swift

var b: CGPoint { get set }

end

The start point of the bezier curve.

Declaration

Objective-C

@property (nonatomic) CGPoint end;

Swift

var end: CGPoint { get set }


                        
                        
                        -getYForX:

Gets interpolated y values for specified x value.

Declaration

Objective-C

- (float)getYForX:(float)x;

Swift

func getYFor(x: Float) -> Float

Parameters

`x`	The x value.

Return Value

The interpolated y value.

-calculateApproximatedLength
Calculates approximate length of the bezier curve
Declaration
Objective-C

- (float)calculateApproximatedLength;
Swift

func calculateApproximatedLength() -> Float
Return Value

The length of bezier curve


                        
                        
                        -divideCurveAtT:subStart:subA:subB:subEnd:

Splits bezier curve at specified t.

Declaration

Objective-C

- (void)divideCurveAtT:(float)t
              subStart:(nonnull CGPoint *)subStart
                  subA:(nonnull CGPoint *)subA
                  subB:(nonnull CGPoint *)subB
                subEnd:(nonnull CGPoint *)subEnd;

Swift

func divideCurve(atT t: Float, subStart: UnsafeMutablePointer<CGPoint>, subA: UnsafeMutablePointer<CGPoint>, subB: UnsafeMutablePointer<CGPoint>, subEnd: UnsafeMutablePointer<CGPoint>)

Parameters

`t`	The t values from 0 to 1 to split curve at.
`subStart`	The start point of sub curve.
`subA`	The a control point of sub curve.
`subB`	The b control point of sub curve.
`subEnd`	The end point of sub curve.