Introduction
glre is a simple glsl Reactive Engine on the web and native via TypeScript, React, Solid and more.
Installation
npm install glre
DocumentationDocs : glre IntroductionAPI : glre API and featureGuide : Creating a scene | Ecosystem⛪️ reev: reactive event state manager🔮 refr: request animation frame | Staying informedgithub discussions welcome✨@tseijp twittertsei.jp articles |
PRs
welcome✨
What does it look like?
glre simplifies glsl programming via TypeScript, React, Solid and more (live demo). |
import { createRoot } from 'react-dom/client'
import { useGL, useFrame } from 'glre/react'
const fragment = `
precision highp float;
uniform vec2 iResolution;
void main() {
gl_FragColor = vec4(fract(gl_FragCoord.xy / iResolution), 0, 1);
}
`
const App = () => {
const gl = useGL({ fragment })
useFrame(() => {
gl.clear()
gl.viewport()
gl.drawArrays()
})
return <canvas ref={gl.ref} />
}
createRoot(document.getElementById('root')).render(<App />)
react-native supported (codesandbox demo)
import { GLView } from 'expo-gl'
import { useGL, useFrame } from 'glre/native'
import { registerRootComponent } from 'expo'
const fragment = `
precision highp float;
uniform vec2 iResolution;
void main() {
gl_FragColor = vec4(fract(gl_FragCoord.xy / iResolution), 0, 1);
}
`
const App = () => {
const self = useGL({ fragment })
useFrame(() => {
self.clear()
self.viewport()
self.drawArrays()
self.gl.flush()
self.gl.endFrameEXP()
})
return <GLView style={{ flex: 1 }} onContextCreate={self.ref} />
}
registerRootComponent(App)
solid js supported (codesandbox demo)
import { render } from 'solid-js/web'
import { onGL, onFrame } from 'glre/solid'
const fragment = `
precision highp float;
uniform vec2 iResolution;
void main() {
gl_FragColor = vec4(fract(gl_FragCoord.xy / iResolution), 0, 1);
}
`
const App = () => {
const gl = onGL({ fragment })
onFrame(() => {
gl.clear()
gl.viewport()
gl.drawArrays()
})
return <canvas ref={gl.ref} />
}
render(() => <App />, document.getElementById('root'))
pure js supported (codesandbox demo)
<canvas id="id" style="top: 0; left: 0; position: fixed" />
<script type="module">
import self from 'https://cdn.skypack.dev/glre@latest'
const fragment = `
precision highp float;
uniform vec2 iResolution;
void main() {
gl_FragColor = vec4(fract(gl_FragCoord.xy / iResolution), 0, 1);
}
`
function setup() {
const el = document.getElementById('id')
const gl = el.getContext('webgl2')
self({ el, gl, fragment })
self.init()
self.resize()
draw()
}
function draw() {
requestAnimationFrame(draw)
self.render()
self.clear()
self.viewport()
self.drawArrays()
}
document.addEventListener('DOMContentLoaded', setup)
</script>