# displayTransform

Source: https://www.nianticspatial.com/docs/api/swift/NSDK.ImageMath.method-displayTransform/

displayTransform

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## Declaration

static func displayTransform(for orientation: UIInterfaceOrientation, viewportSize: CGSize, imageSize: CGSize) -> CGAffineTransform

#### Summary

Returns an affine transform that maps normalized image coordinates
into a coordinate space suitable for rendering the camera image
in the given viewport and orientation.
This method replicates ARKit's displayTransform(for:viewportSize:)
by computing a transform that accounts for the camera image's
aspect ratio, the device's interface orientation, and the desired
viewport size.

#### Returns

A CGAffineTransform that converts normalized image coordinates
  (with origin at top-left, ranging from 0.0 to 1.0) into the coordinate
  space of the viewport, accounting for orientation and aspect ratio.

### Parameters

| Name | Type | Summary |
| --- | --- | --- |
| orientation | UIInterfaceOrientation | - |
| viewportSize | CGSize | The size of the viewport in which the image will be rendered. |
| imageSize | CGSize | The dimensions of the camera image. |

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