From fdd0df09ed0cec56c6a7abee558f9428a1f577ba Mon Sep 17 00:00:00 2001
From: William Candillon <wcandillon@gmail.com>
Date: Wed, 25 Dec 2019 19:56:54 +0100
Subject: [PATCH] =?UTF-8?q?fix(=E2=99=BE):=20Remove=20functions=20that=20c?=
 =?UTF-8?q?an=20now=20be=20used=20directly=20from=20Reanimated=20(#145)?=
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---
 README.md                      | 28 ---------------------
 src/Math.ts                    | 46 ----------------------------------
 src/bezier/CubicBezierSolve.ts |  5 ++--
 3 files changed, 3 insertions(+), 76 deletions(-)

diff --git a/README.md b/README.md
index 3c6c7597..0ad65919 100644
--- a/README.md
+++ b/README.md
@@ -162,16 +162,6 @@ Returns 1 if the difference between the two values is less than precision.
 Otherwise returns 0.
 Default value for the precision is 0.001.
 
-### `atan(node: Node): Node`
-
-Returns the arc-tangent of the value in radians of the given node.
-We provide this function in case you are using a version of reanimated that doesn't ship `atan`.
-Beware that this function is not as precise at `Math.atan()` nor `Animated.atan()`.
-
-```js
-atan(rad: Node) => Node
-```
-
 ### `atan2(node: Node): Node`
 
 Returns the angle in the plane (in radians) between the positive x-axis and the ray from (0,0) to the point (x,y), `atan2(y,x)`.
@@ -180,24 +170,6 @@ Returns the angle in the plane (in radians) between the positive x-axis and the
 atan2(y: Node, x Node) => Node
 ```
 
-### `acos(node: Node): Node`
-
-Returns the arc-cosine of the value in radians of the given node.
-We provide this function in case you are using a version of reanimated that doesn't ship `acos`.
-
-```js
-acos(y: Node, x Node) => Node
-```
-
-### `asin(node: Node): Node`
-
-Returns the arc-sinus of the value in radians of the given node.
-We provide this function in case you are using a version of reanimated that doesn't ship `cos`.
-
-```js
-asin(y: Node, x Node) => Node
-```
-
 ### `cubicBezier(t: Node, p0: Node, p1: Node, p2: Node, p3: Node): Node`
 
 Returns the coordinate of a cubic bezier curve.
diff --git a/src/Math.ts b/src/Math.ts
index 20025ec3..8e086b85 100644
--- a/src/Math.ts
+++ b/src/Math.ts
@@ -4,7 +4,6 @@ const {
   Value,
   block,
   set,
-  sqrt,
   cond,
   add,
   multiply,
@@ -91,51 +90,6 @@ export const atan2 = (
   ]);
 };
 
-// https://developer.download.nvidia.com/cg/atan.html
-export const atan = (x: Animated.Adaptable<number>): Animated.Node<number> =>
-  atan2(x, 1);
-
-// https://developer.download.nvidia.com/cg/acos.html
-export const acos = (x1: Animated.Adaptable<number>) => {
-  const negate: Animated.Value<number> = new Value();
-  const x: Animated.Value<number> = new Value();
-  const ret: Animated.Value<number> = new Value();
-  return block([
-    set(negate, lessThan(x, 0)),
-    set(x, abs(x1)),
-    set(ret, -0.0187293),
-    set(ret, multiply(ret, x)),
-    set(ret, add(ret, 0.074261)),
-    set(ret, multiply(ret, x)),
-    set(ret, sub(ret, 0.2121144)),
-    set(ret, multiply(ret, x)),
-    set(ret, add(ret, 1.5707288)),
-    set(ret, sqrt(sub(1, x))),
-    set(ret, sub(ret, multiply(2, negate, ret))),
-    add(multiply(negate, Math.PI), ret)
-  ]);
-};
-
-// https://developer.download.nvidia.com/cg/asin.html
-export const asin = (x1: Animated.Adaptable<number>) => {
-  const negate: Animated.Value<number> = new Value();
-  const x: Animated.Value<number> = new Value();
-  const ret: Animated.Value<number> = new Value();
-  return block([
-    set(negate, lessThan(x, 0)),
-    set(x, abs(x1)),
-    set(ret, -0.0187293),
-    set(ret, multiply(ret, x)),
-    set(ret, add(ret, 0.074261)),
-    set(ret, multiply(ret, x)),
-    set(ret, sub(ret, 0.2121144)),
-    set(ret, multiply(ret, x)),
-    set(ret, add(ret, 1.5707288)),
-    set(ret, sub(Math.PI / 2, multiply(sqrt(sub(1, x)), ret))),
-    sub(ret, multiply(2, negate, ret))
-  ]);
-};
-
 export const cubicBezier = (
   t: Animated.Node<number>,
   p0: Animated.Node<number>,
diff --git a/src/bezier/CubicBezierSolve.ts b/src/bezier/CubicBezierSolve.ts
index 95979711..5a5937da 100644
--- a/src/bezier/CubicBezierSolve.ts
+++ b/src/bezier/CubicBezierSolve.ts
@@ -1,7 +1,7 @@
 import Animated from "react-native-reanimated";
 
 import { find } from "../Array";
-import { acos, approximates } from "../Math";
+import { approximates } from "../Math";
 
 const {
   Value,
@@ -19,7 +19,8 @@ const {
   set,
   sub,
   cos,
-  not
+  not,
+  acos
 } = Animated;
 
 const isRootValidForCubicBezier = (root: Animated.Node<number>) =>