added TODO with non-linear interpolation with github ticket

hellohuanlin · hellohuanlin · commit 3a45ba4c84d2 · 2023-03-22T10:15:46.000-07:00
diff --git a/shell/platform/darwin/ios/framework/Source/FlutterViewController.mm b/shell/platform/darwin/ios/framework/Source/FlutterViewController.mm
@@ -48,6 +48,8 @@
  * Compute the interpolated value under linear interpolation.
  */
 CGFloat FLTLinearInterpolatedValue(double progress, CGFloat from, CGFloat to, CGFloat scale) {
+  // TODO(hellohuanlin): consider non-linear interpolation to further reduce rotation distortion.
+  // See: https://github.com/flutter/flutter/issues/123248
   NSCAssert(progress >= 0 && progress <= 1, @"progress must be between 0 and 1");
   return (from * (1 - progress) + to * progress) * scale;
 }

Original file line number	Diff line number	Diff line change
`@@ -48,6 +48,8 @@`
`48`	`48`	`* Compute the interpolated value under linear interpolation.`
`49`	`49`	`*/`
`50`	`50`	`CGFloat FLTLinearInterpolatedValue(double progress, CGFloat from, CGFloat to, CGFloat scale) {`
	`51`	`+ // TODO(hellohuanlin): consider non-linear interpolation to further reduce rotation distortion.`
	`52`	`+ // See: https://github.com/flutter/flutter/issues/123248`
`51`	`53`	`NSCAssert(progress >= 0 && progress <= 1, @"progress must be between 0 and 1");`
`52`	`54`	`return (from * (1 - progress) + to * progress) * scale;`
`53`	`55`	`}`