Home > rc-js-util > Range2d > scaleRelativeTo
Scales the range relative to a point (may not be outside of the range).
Signature:
scaleRelativeTo<TResult extends TTypedArray = TArray>(_scalingFactor: number, _relativeTo: IReadonlyVec2<TTypedArray>, _result?: Range2d<TResult>): Range2d<TResult>;
| Parameter | Type | Description |
|---|---|---|
| _scalingFactor | number | |
| _relativeTo | IReadonlyVec2<TTypedArray> | |
| _result | Range2d<TResult> | (Optional) |
Returns:
Range2d<TResult>
If the point is at a boundary, then the range will be scaled such that that boundary is not changed. Where the point is away from a boundary, the updated range will have boundaries proportional to the distance from the center of the range.
E.g. scaling factor of 0.5, P represents the position of the point in the range:
XMin XMax
|P-------------------------|
|-------------|
|------------P-------------|
|-------------|