Introduced AnimatedDivision

Summary:
Combining 2 animated values via addition, multiplication, and modulo are already supported, and this adds another one: division.
There are some cases where an animated value needs to invert (1 / x) another animated value for calculation. An example is inverting a scale (2x --> 0.5x), e.g.:

```
const a = Animated.Value(1);
const b = Animated.divide(1, a);

Animated.spring(a, {
  toValue: 2,
}).start();
```

`b` will then follow `a`'s spring animation and produce the value of `1 / a`.

The basic usage is like this:

```
<Animated.View style={{transform: [{scale: a}]}}>
  <Animated.Image style={{transform: [{scale: b}]}} />
<Animated.View>
```

In this example, the inner image won't get stretched at all because the parent's scaling gets cancelled out.

Also added this to native animated implementation.

Reviewed By: foghina, mmmulani

Differential Revision: D3922891

fbshipit-source-id: 32508956c4b65b2deb7574d50a10c85b4809b961
This commit is contained in:
Kevin Gozali
2016-09-26 16:32:27 -07:00
committed by Facebook Github Bot 6
parent 9af620bc33
commit 0a0dd30c6a
7 changed files with 184 additions and 7 deletions

View File

@@ -89,6 +89,8 @@ import javax.annotation.Nullable;
node = new InterpolationAnimatedNode(config);
} else if ("addition".equals(type)) {
node = new AdditionAnimatedNode(config, this);
} else if ("division".equals(type)) {
node = new DivisionAnimatedNode(config, this);
} else if ("multiplication".equals(type)) {
node = new MultiplicationAnimatedNode(config, this);
} else if ("diffclamp".equals(type)) {