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fix: Represent neutralZoom in factor instead of percentage (#179)

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* Use factor instead of percent for `neutralZoom`

* fix zoom calculation

* Update CameraPage.tsx
This commit is contained in:
Marc Rousavy
2021-06-07 10:46:53 +02:00
committed by GitHub
parent 8aec647acd
commit 555474be7d
7 changed files with 37 additions and 51 deletions
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14
src/CameraDevice.ts
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@@ -228,12 +228,20 @@ export interface CameraDevice {
*/
maxZoom: number;
/**
* The zoom percentage (`0.0`-`1.0`) where the camera is "neutral".
* The zoom factor where the camera is "neutral".
*
* * For single-physical cameras this property is always `0.0`.
* * For multi cameras this property is a value between `0.0` and `1.0`, where the camera is in wide-angle mode and hasn't switched to the ultra-wide (`0.5`x zoom) or telephoto camera yet.
* * For single-physical cameras this property is always `1.0`.
* * For multi cameras this property is a value between `minZoom` and `maxZoom`, where the camera is in _wide-angle_ mode and hasn't switched to the _ultra-wide-angle_ (`0.5`x zoom) or telephoto camera yet.
*
* Use this value as an initial value for the zoom property if you implement custom zoom. (e.g. reanimated shared value should be initially set to this value)
* @example
* const device = ...
*
* const neutralZoomPercent = (device.neutralZoom - device.minZoom) / (device.maxZoom - device.minZoom)
* const zoomFactor = useSharedValue(neutralZoomPercent) // <-- initial value so it doesn't start at ultra-wide
* const cameraProps = useAnimatedProps(() => ({
* zoom: zoomFactor.value
* }))
*/
neutralZoom: number;
/**