Part of a tutorial by Jim Vallandingham introducing regl for data visualization.
Read it Here: Intro to regl
Blocks associated with this tutorial:
Last active
May 27, 2017 22:55
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regl triangle moving and using props
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| <!DOCTYPE html> | |
| <title>Simple regl Triangle Example using props </title> | |
| <body> | |
| <script src="https://npmcdn.com/[email protected]/dist/regl.js"></script> | |
| <script src="index.js"></script> | |
| </body> |
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| // 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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