---
title: "init(_:)"
framework: usdkit
role: symbol
role_heading: Initializer
platforms: [iOS 27.0+, iPadOS 27.0+, Mac Catalyst 27.0+, macOS 27.0+, tvOS 27.0+, visionOS 27.0+]
path: "usdkit/usdvalue/matrix4d/init(_:)-6b27q"
---

# init(_:)

Creates a matrix from a Spatial projective transform (double-precision).

## Declaration

```swift
init(_ projectiveTransform: ProjectiveTransform3D)
```

## Discussion

Discussion ProjectiveTransform3D is column-major and treats vectors as column vectors; Matrix4d is row-major and treats vectors as row vectors. The in-memory layout is identical, so this initializer reads each m[col, row] element and lays it out row-major.