Show coordinate axis

Description

We will show the built in co-ordinate guide in the scene. When the AR scene starts it places this at the World Origin which is where the camera was when the app was launched.

This is achieved by setting the ARSCNDebugOptions.ShowWorldOrigin flag in the DebugOptions when creating the ARSCNView.

This is useful for learning which way X, Y, and Z is in the scene.

Just remember..

• X = Left to Right. i.e Left is -X and Right is +X
• Y = Down to Up. i.e. Down is -Y and Up is +Y
• Z = Forwards to Backwards. i.e. Forwards is -Z and Backwards is +Z

So looking at the Coordinate helper when it is enabled.. Green is Y, Red is X and Blue is Z.

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