# CalculateDisplayMatrix

Source: https://www.nianticspatial.com/docs/api/unity/NianticSpatial.NSDK.AR.Utilities.CameraMath.CalculateDisplayMatrix/

CalculateDisplayMatrix

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## Declaration

public static Matrix4x4 CalculateDisplayMatrix(int imageWidth, int imageHeight, int viewportWidth, int viewportHeight, ScreenOrientation viewportOrientation, bool invertVertically = true, MatrixLayout layout = MatrixLayout.ColumnMajor, bool reverseRotation = false)

#### Summary

Returns an affine transformation matrix for converting between normalized image
    coordinates and a coordinate space appropriate for rendering the camera image onscreen.

#### Remarks

The viewport width and height arguments must conform with the current orientation.

#### Returns

An affine 4x4 transformation matrix.

### Parameters

| Name | Type | Summary |
| --- | --- | --- |
| imageWidth | int | The width of the raw AR background image in pixels. |
| imageHeight | int | The height of the raw AR background image in pixels. |
| viewportWidth | int | The width of the viewport in pixels. |
| viewportHeight | int | The height of the viewport in pixels. |
| viewportOrientation | ScreenOrientation | The orientation of the viewport. |
| invertVertically | bool | Whether to mirror the image across the X axis. This reverses the order of the horizontal rows, flipping the image upside down. |
| layout | MatrixLayout | The layout of the resulting matrix. |
| reverseRotation | bool | On some platforms, the direction of UI rotation is counter-clockwise. |

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