Experiments using SwiftUI view and view model to control ShaderGraphNodes in a Reality Composer Pro scene.
We have a Reality Composer Pro scene showing a cube with a ShaderGraph material. The cube's 'material is built with a custom ShaderGraph with 3 inputs (red, green, blue). Values for the RCP graph's 'inputs are kept in a View Model. The View updates the View Model, which then updates the RealityView's scene.
The project is meant as a simple demonstration of how to pass values into RCP from SwiftUI while keeping business logic out of the View. This is of course a convoluted way to control the cube's color, but it makes for simple demo code.
See:
- WWDC23 Work with Reality Composer Pro content in Xcode
- SO: Controlling parameters in MaterialX
- SO: create parameter in Shader Graph
- Apple Shader Graph documentation
