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vlandham/README.md

Last active May 27, 2017
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regl triangle moving and using props
<!DOCTYPE html>
<title>Simple regl Triangle Example using props </title>
<body>
<script src="https://npmcdn.com/regl@1.3.0/dist/regl.js"></script>
<script src="index.js"></script>
</body>
// In practice, you would probably import/require regl
// const regl = require('regl')();
// In this block, it is already loaded, so we just
// initialize it. For more info, see:
// https://github.com/regl-project/regl#standalone-script-tag
var regl = createREGL();
var drawTriangle = regl({
frag: `
precision mediump float;
uniform vec4 color;
void main () {
gl_FragColor = color;
}`,
vert: `
precision mediump float;
attribute vec2 position;
void main () {
gl_Position = vec4(position, 0, 1);
}`,
attributes: {
position: function(context, props) {
return [
[-1 * Math.cos(context.tick / 100), 0],
[Math.sin(context.tick / 100), -1],
[Math.sin(context.tick / 100), 1]
];
}
},
uniforms: {
color: function(context, props) {
return props.color;
}
},
count: 3,
})
regl.frame(function(context) {
drawTriangle({
color: [0.208, 0.304, 1.000, 1.000]
});
});
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