/
AnimatedHelloGL.js
50 lines (45 loc) · 997 Bytes
/
AnimatedHelloGL.js
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const React = require("react");
const GL = require("gl-react");
const { Surface } = require("gl-react-dom");
const shaders = GL.Shaders.create({
helloGL: {
frag: `
precision highp float;
varying vec2 uv;
uniform float value;
void main () {
gl_FragColor = vec4(uv.x, uv.y, value, 1.0);
}
`
}
});
class HelloGL extends React.Component {
constructor (props) {
super(props);
this.state = {
value: 0
};
}
componentDidMount () {
const loop = time => {
requestAnimationFrame(loop);
this.setState({
value: (1 + Math.cos(time / 1000)) / 2 // cycle between 0 and 1
});
};
requestAnimationFrame(loop);
}
render () {
const { width, height } = this.props;
const { value } = this.state;
return <Surface width={width} height={height}>
<GL.Node
shader={shaders.helloGL}
width={width}
height={height}
uniforms={{ value }}
/>
</Surface>;
}
}
module.exports = HelloGL;