Update README.md

README.md

@@ -52,7 +52,7 @@ Source code: [ForceDirectedGraph3D/ContentView.swift](https://github.com/li3zhen
 
 > [!IMPORTANT]  
 > When working with 3D contents, you probably need `Float` types instead of `Double`. The example here manually cast `Double` to `Float`.
-> The `float32` branch provides out-of-box support for `Float` through generics. However, the performance will be downgraded. I’ll try to fix that.
+> The `float32` branch relaxes the generic constraint from `Scalar == Double` to `Scalar: ExpressibleByFloatLiteral`, which allows you to get out-of-box supports for other floating point types. However, the performance will be downgraded. I’m trying to find a workaround.
 
 
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