Golang Introduction--A 2D graphics library learning

This is a creation in Article, where the information may have evolved or changed.

This library is called GG, source code on GitHub.

1. Get the source code and install it locally:

First install git (portal): https://git-scm.com/download/

You can then get the source code from git and install it via the Go Get command (this is where go is installed by default): Go to the Gopath directory in cmd and enter: Go get github.com/fogleman/gg

After a while you can see that Gopath has the source of GG, and by the way GG's reliance on third-party libraries also downloaded.

2. The Src\github.com\fogleman\gg\examples catalogue is an example written by GG authors. Here, pick one out to practice practiced hand:

Package main    Import (      "Github.com/fogleman/gg" "      Math/rand"  )    func main () {        Const W = 1024      Const H = 1024x768      DC: = GG. Newcontext (W, H)//context, with long and wide      DC. Setrgb (0, 0, 0)        //Set current color      DC. Clear ()                //Clear the context and start drawing below for        I: = 0; I < i++ {//Draw 1000 lines, random position, length, color and transparency          x1: = Rand. Float64 () * W          y1: = Rand. Float64 () * H          x2: = Rand. Float64 () * W          y2: = Rand. Float64 () * H            r: = Rand. Float64 ()          g: = Rand. Float64 ()          b: = Rand. Float64 ()          A: = Rand. Float64 () *0.5 + 0.5          w: = Rand. Float64 () + 1          DC. Setrgba (R, G, B, a)          DC. Setlinewidth (w)          DC. DrawLine (x1, y1, x2, y2)//Draw line          DC. Stroke ()                 //No This sentence is not the final drawing of the line of the      }      DC. Savepng ("lines.png")//save context as a picture  }