WarpShader

Fast SwiftUI faster than light visual effect as a SwiftUI view modifier.

Installation

Add WarpShader as a package dependency by either using Xcode > File > Add Package Dependencies… and choosing this repo. Or by adding this package to the dependencies list if you’re using a Swift Package file directly.

Usage

Example usage for SwiftUI is in ContentView.swift.

Apply the .warp() view modifier to any view.

Acknowledgements

This is based on work by “Hazel Quantock” / “TekF” from this code: https://www.shadertoy.com/view/Xdl3D2

Customization

The modifier has a good number of properties that can be customized.

Rectangle()
    .warp(
        starScale: starScale, // relative star size. Things get chonky around 3.5 or so
        speed: speed, // zippy zoom!
        fov: fov, // lower values show a wider view
        bifrost: bifrost, // By Thor’s beard: higher values increase the red-blue separation of stars
        tails: tails, // higher values turn stars into longer lines
        starFieldOffset: starFieldOffset // changes the point of origin of stars
    )

I highly recommend building the included app, WarpShaderExample, clicking the “Controls” button, and finding values you find most pleasing. To build the app from this repo, chooseo the WarpShaderExample target then ‘Run’.

Animating between warp parameters leads to many interesting results that may seem familiar.