var shell = require("gl-now")()

var glslify = require("glslify")

var createBuffer = require("../buffer.js")

var createShader = glslify({

vertex: "\

attribute vec2 position;\

varying vec2 uv;\

void main() {\

gl_Position = vec4(position, 0.0, 1.0);\

uv = position.xy;\

}",

fragment: "\

precision highp float;\

uniform float tick;\

varying vec2 uv;\

void main() {\

gl_FragColor = vec4(0.5*(uv+1.0), 0.5*(cos(tick)+1.0), 1.0);\

}",

inline: true

})

var buffer, shader

shell.on("gl-init", function() {

var gl = shell.gl

//Create buffer

buffer = createBuffer(gl, [-1, 0, 0,-1, 1, 1])

//Create shader

shader = createShader(gl)

shader.attributes.position.location = 0

})

shell.on("gl-render", function(t) {

var gl = shell.gl

shader.bind()

buffer.bind()

shader.attributes.position.pointer()

shader.uniforms.tick = Date.now() / 1000.0

gl.drawArrays(gl.TRIANGLES, 0, 3)

})