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main.go

@@ -12,13 +12,17 @@ import (
 	"golang.org/x/image/colornames"
 )
 
+//open file from the system
 func loadPicture(path string) (pixel.Picture, error) {
 	file, err := os.Open(path)
 	if err != nil {
 		return nil, err
 	}
 
+	//user 'defer' to close the file later on
 	defer file.Close()
+
+	//decode the file to find it's type
 	img, _, err := image.Decode(file)
 	if err != nil {
 		return nil, err
@@ -26,41 +30,58 @@ func loadPicture(path string) (pixel.Picture, error) {
 	return pixel.PictureDataFromImage(img), nil
 }
 
+//Pixel's main function (because GO forced them to do it this way)
 func run() {
+	//set the Window parameters
 	cfg := pixelgl.WindowConfig{
 		Title:  "Pixel Rocks!",
 		Bounds: pixel.R(0, 0, 1024, 768),
 		VSync:  true,
 	}
 
+	//create a window and pass the parameters
 	win, err := pixelgl.NewWindow(cfg)
 	if err != nil {
 		panic(err)
 	}
 
+	//smooth the edges of the image (antialiasing)
 	win.SetSmooth(true)
+
+	//load a specific image and catch any errors
 	pic, err := loadPicture("hiking.png")
 	if err != nil {
 		panic(err)
 	}
 
+	//create a sprite using the loaded image
 	sprite := pixel.NewSprite(pic, pic.Bounds())
 
+	//set the angle of the image
 	angle := 0.0
+
+	//set the time to compare later
 	last := time.Now()
 
+	//loop until window is closed by "X" button
 	for !win.Closed() {
+		//compare the last time to delta time
 		dt := time.Since(last).Seconds()
 		last = time.Now()
 
+		//set the angle according to delta time
 		angle += 3 * dt
 
+		//refresh screen and set background color
 		win.Clear(colornames.Firebrick)
 
+		//set the matrix and location of spirte in window
 		mat := pixel.IM
 		mat = mat.Rotated(pixel.ZV, angle)
 		mat = mat.Moved(win.Bounds().Center())
 		sprite.Draw(win, mat)
+
+		//update the window
 		win.Update()
 	}
 }