StackGenVis: Alignment of Data, Algorithms, and Models for Stacking Ensemble Learning Using Performance Metrics
https://doi.org/10.1109/TVCG.2020.3030352
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55 lines
1.2 KiB
55 lines
1.2 KiB
4 years ago
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a-big-triangle
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==============
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Draws a big triangle that covers the entire viewport. Useful for GPGPU or when applying fullscreen postprocessing effects.
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If you're wondering *why* a big triangle and not a big square made from two smaller triangles, there are potentially significant [performance advantages](http://michaldrobot.com/2014/04/01/gcn-execution-patterns-in-full-screen-passes/) in taking the former approach.
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## Example
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```javascript
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var shell = require("gl-now")()
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var drawTriangle = require("a-big-triangle")
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var createShader = require("gl-shader")
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var shader
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shell.on("gl-init", function() {
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shader = createShader(shell.gl,
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"precision mediump float;\
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attribute vec2 position;\
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varying vec2 uv;\
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void main() {\
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uv = position.xy;\
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gl_Position = vec4(position.xy, 0.0, 1.0);\
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}",
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"precision mediump float;\
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varying vec2 uv;\
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void main() {\
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gl_FragColor = vec4(uv, 0, 1);\
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}")
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})
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shell.on("gl-render", function() {
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shader.bind()
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drawTriangle(shell.gl)
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})
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```
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[Check it out in your browser](http://mikolalysenko.github.io/a-big-triangle/)
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## Install
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```sh
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npm install a-big-triangle
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```
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## API
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### `require("a-big-triangle")(gl)`
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Draws a fullscreen triangle.
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* `gl` is a WebGL context
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## Credits
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(c) 2013
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