Object TQuadraticBezierCurve
Unit
Declaration
type TQuadraticBezierCurve = object(TObject)
Description
Definition of a Bézier curve of order 2. It has one control point
Hierarchy
- TObject
- TQuadraticBezierCurve
Overview
Fields
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c: TPointF; |
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p1: TPointF; |
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p2: TPointF; |
Methods
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function ComputeLength: single; |
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function ComputePointAt(t: single): TPointF; |
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function GetBounds: TRectF; |
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function ToPoints(AAcceptedDeviation: single = 0.1; AIncludeFirstPoint: boolean = true): ArrayOfTPointF; |
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procedure CopyToPath(ADest: IBGRAPath); |
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procedure Split(out ALeft, ARight: TQuadraticBezierCurve); |
Description
Fields
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c: TPointF; |
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Control point (not reached by the curve) | |
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p1: TPointF; |
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Starting point (reached) | |
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p2: TPointF; |
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Ending point (reached) | |
Methods
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function ComputeLength: single; |
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Compute the exact length of the curve | |
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function ComputePointAt(t: single): TPointF; |
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Computes the point at time t, varying from 0 to 1 | |
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function GetBounds: TRectF; |
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Computes the rectangular bounds | |
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function ToPoints(AAcceptedDeviation: single = 0.1; AIncludeFirstPoint: boolean = true): ArrayOfTPointF; |
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Computes a polygonal approximation of the curve. AAcceptedDeviation indicates the maximum orthogonal distance that is ignored and approximated by a straight line. AIncludeFirstPoint indicates if the first point must be included in the array | |
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procedure CopyToPath(ADest: IBGRAPath); |
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Copy the curve to the given path | |
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procedure Split(out ALeft, ARight: TQuadraticBezierCurve); |
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