IndexedXYCollection Class
abstract base class for access to XYZ data with indexed reference.
- This allows algorithms to work with Point2d[] or GrowableXYZ. GrowableXYZArray implements these for its data. Point2dArrayCarrier carries a (reference to) a Point2d[] and implements the methods with calls on that array reference.
- In addition to "point by point" accessors, there abstract members compute commonly useful vector data "between points".
- Methods that create vectors among multiple indices allow callers to avoid creating temporaries.
Extended by
Methods
Name | Description | |
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crossProductIndexIndexIndex(origin: number, indexA: number, indexB: number): number | undefined Abstract | Return the cross product of vectors from origin point at indexA to target points at indexB and indexC |
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crossProductXAndYIndexIndex(origin: XAndY, indexA: number, indexB: number): number | undefined Abstract | Return the cross product of vectors from origin to points at indexA and indexB |
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getPoint2dAtCheckedPointIndex(index: number, result?: Point2d): Point2d | undefined Abstract | Get from index as a Point2d |
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getVector2dAtCheckedVectorIndex(index: number, result?: Vector2d): Vector2d | undefined Abstract | Get from index as a Vector2d |
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vectorIndexIndex(indexA: number, indexB: number, result?: Vector2d): Vector2d | undefined Abstract | Return a vector from the point at indexA to the point at indexB |
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vectorXAndYIndex(origin: XAndY, indexB: number, result?: Vector2d): Vector2d | undefined Abstract | Return a vector from given origin to the point at indexB |
Properties
Name | Type | Description | |
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length Accessor ReadOnly | number | read-only property for number of XYZ in the collection. |
Defined in
Last Updated: 08 January, 2020