gl derp

package main

import (
    "fmt"
    gl "github.com/chsc/gogl/gl21"
    "github.com/go-gl/glfw"
)

var (
    title   = "Test"
    width   = 640
    height  = 480
    running = true
    err     error
)

const vertexsource = `
attribute vec4 vPosition;
void main()
{
    gl_Position = vPosition;
}
`

const fragmentsource = `
precision mediump float;
void main()
{
    gl_FragColor = vec4 ( 1.0, 1.0, 0.0, 1.0 );
}
`

func main() {
    err = glfw.Init()
    if err != nil {
        fmt.Println(err)
        return
    }
    glfw.OpenWindowHint(glfw.WindowNoResize, gl.TRUE)
    err = glfw.OpenWindow(width, height, 8, 8, 8, 8, 32, 8, glfw.Windowed)
    if err != nil {
        fmt.Println(err)
        return
    }
    glfw.SetSwapInterval(1)
    glfw.SetWindowTitle(title)
    glfw.SetKeyCallback(onKey)
    gl.Init()
    gl.ClearColor(0.3, 0.0, 0.7, 1.0)
    // XYZ in OGL is -1 to +1 on the viewport: how far right, how far up + depth)
    //a counter-clockwise triangle is front-facing
    vertdata := [9]gl.Float{-1.0, 1.0, 0.0,     -1.0, -1.0, 0.0,    1.0, -0.0, 0.0}
    var vbo gl.Uint
    var pointer gl.Pointer
    gl.GenBuffers(1, &vbo)
    gl.BindBuffer(gl.ARRAY_BUFFER, vbo)
    gl.BufferData(gl.ARRAY_BUFFER, 9*4, gl.Pointer(&vertdata[0]), gl.STATIC_DRAW)
    gl.EnableVertexAttribArray(0)
    gl.BindBuffer(gl.ARRAY_BUFFER, vbo)
    gl.VertexAttribPointer(0, 3, gl.FLOAT, gl.FALSE, 0, pointer)

    for running == true {
        gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

        gl.DrawArrays(gl.TRIANGLES, 0, 3)
        //gl.DisableVertexAttribArray(0) Do before going to draw next array.
        glfw.SwapBuffers()
    }
    glfw.Terminate()
}

func onKey(key, state int) {
    fmt.Println(key, state)
    switch key {
    case glfw.KeyEsc:
        running = false
    }
}