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How to rotate a view in 3D

Paul Hudson    @twostraws   

Updated for Xcode 12.0

SwiftUI’s rotation3DEffect() modifier lets us rotate views in 3D space to create beautiful effects in almost no code.

This modifier accepts two parameters: what angle to rotate (in degrees or radians), plus a tuple containing the X, Y, and Z axis around which to perform the rotation.

Important: If you’ve never done 3D rotation before you should think about the X/Y/Z axes as being skewers through your views. The X axis goes horizontally, so if you rotate on the X axis it’s like putting a horizontal skewer through your view – any rotation makes the top or bottom nearer or further, but won’t adjust the leading and trailing edges.

So, if you wanted to rotate some text by 45 degrees around the X axis (which would cause the top of the text to look further away than the bottom), you might write this:

Text("EPISODE LLVM")
    .font(.largeTitle)
    .foregroundColor(.yellow)
    .rotation3DEffect(.degrees(45), axis: (x: 1, y: 0, z: 0))

Yes, you can make your own Star Wars crawl in SwiftUI.

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