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17 lines
876 B
17 lines
876 B
import type { ChartArea } from '../types/index.js'; |
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import type { SplinePoint } from '../types/geometric.js'; |
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export declare function splineCurve(firstPoint: SplinePoint, middlePoint: SplinePoint, afterPoint: SplinePoint, t: number): { |
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previous: SplinePoint; |
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next: SplinePoint; |
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}; |
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/** |
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* This function calculates Bézier control points in a similar way than |splineCurve|, |
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* but preserves monotonicity of the provided data and ensures no local extremums are added |
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* between the dataset discrete points due to the interpolation. |
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* See : https://en.wikipedia.org/wiki/Monotone_cubic_interpolation |
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*/ |
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export declare function splineCurveMonotone(points: SplinePoint[], indexAxis?: 'x' | 'y'): void; |
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/** |
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* @private |
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*/ |
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export declare function _updateBezierControlPoints(points: SplinePoint[], options: any, area: ChartArea, loop: boolean, indexAxis: 'x' | 'y'): void;
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