2016-02-15 16:52:45 +01:00
<!DOCTYPE html>
2016-08-27 17:58:27 +02:00
< script src = "../scripts/force-https.js" > < / script >
2016-02-15 16:52:45 +01:00
< link rel = "shortcut icon" href = "../favicon.png" type = "image/png" >
< link rel = "icon" href = "../favicon.png" type = "image/png" >
< title > Ebiten example - noise< / title >
2016-08-27 17:48:15 +02:00
< link rel = "stylesheet" href = "../stylesheets/bootstrap.min.css" >
< link rel = "stylesheet" href = "../stylesheets/highlight-github.css" >
< link rel = "stylesheet" href = "../stylesheets/ebiten.css" >
2016-09-02 18:55:07 +02:00
< script src = "../scripts/googleanalytics.js" > < / script >
2016-08-26 19:28:57 +02:00
2017-08-17 20:00:05 +02:00
< nav class = "navbar" > < div class = "container" >
2017-08-17 18:22:19 +02:00
< nav class = "d-flex flex-row" style = "width: 100%;" >
2017-08-17 20:00:05 +02:00
< div class = "nav mr-auto" > < a class = "navbar-brand" href = "../" > < img src = "../images/logo_white.svg" alt = "EBITEN" > < / a > < / div >
2017-08-17 18:22:19 +02:00
< ul class = "nav" >
< li class = "nav-item" > < a class = "nav-link" href = "https://github.com/hajimehoshi/ebiten" > GitHub< / a > < / li >
< li class = "nav-item" > < a class = "nav-link" href = "https://godoc.org/github.com/hajimehoshi/ebiten" > GoDoc< / a > < / li >
< li class = "nav-item" > < a class = "nav-link" href = "https://github.com/hajimehoshi/ebiten/wiki" > Wiki< / a >
2016-08-26 19:37:08 +02:00
< / ul >
< / nav >
2017-08-17 20:00:05 +02:00
< / div > < / nav >
2016-02-15 16:52:45 +01:00
2016-08-26 19:28:57 +02:00
< main > < div class = "container" >
2016-08-26 20:18:16 +02:00
< h2 > Ebiten example - noise< / h2 >
2016-08-26 19:28:57 +02:00
< iframe src = "noise.content.html" width = "640" height = "480" > < / iframe >
2017-08-17 18:22:19 +02:00
< pre class = "card" > < div class = "card-body" > < code class = "language-go" > // + build example
2016-08-26 16:33:36 +02:00
package main
2016-02-15 16:52:45 +01:00
import (
2016-08-26 22:36:52 +02:00
" fmt"
" image"
" log"
2016-02-15 17:13:04 +01:00
2016-08-26 22:36:52 +02:00
" github.com/hajimehoshi/ebiten"
" github.com/hajimehoshi/ebiten/ebitenutil"
2016-02-15 16:52:45 +01:00
)
const (
2016-08-26 22:36:52 +02:00
screenWidth = 320
screenHeight = 240
2016-02-15 16:52:45 +01:00
)
var (
2016-08-26 22:36:52 +02:00
noiseImage *image.RGBA
2016-02-15 16:52:45 +01:00
)
type rand struct {
2016-08-26 22:36:52 +02:00
x, y, z, w uint32
2016-02-15 16:52:45 +01:00
}
func (r *rand) next() uint32 {
2016-08-26 22:36:52 +02:00
// math/rand is too slow to keep 60 FPS on web browsers.
// Use Xorshift instead: http://en.wikipedia.org/wiki/Xorshift
t := r.x ^ (r.x < < 11)
r.x, r.y, r.z = r.y, r.z, r.w
r.w = (r.w ^ (r.w > > 19)) ^ (t ^ (t > > 8))
return r.w
2016-02-15 16:52:45 +01:00
}
var randInstance = & rand{12345678, 4185243, 776511, 45411}
func update(screen *ebiten.Image) error {
2016-08-26 22:36:52 +02:00
const l = screenWidth * screenHeight
for i := 0; i < l; i+ + {
x := randInstance.next()
noiseImage.Pix[4*i] = uint8(x > > 24)
noiseImage.Pix[4*i+ 1] = uint8(x > > 16)
noiseImage.Pix[4*i+ 2] = uint8(x > > 8)
noiseImage.Pix[4*i+ 3] = 0xff
}
2017-05-16 03:38:34 +02:00
if ebiten.IsRunningSlowly() {
return nil
}
2017-03-04 15:27:25 +01:00
screen.ReplacePixels(noiseImage.Pix)
ebitenutil.DebugPrint(screen, fmt.Sprintf(" FPS: %f" , ebiten.CurrentFPS()))
2016-08-26 22:36:52 +02:00
return nil
2016-02-15 16:52:45 +01:00
}
func main() {
2016-08-26 22:36:52 +02:00
noiseImage = image.NewRGBA(image.Rect(0, 0, screenWidth, screenHeight))
if err := ebiten.Run(update, screenWidth, screenHeight, 2, " Noise (Ebiten Demo)" ); err != nil {
log.Fatal(err)
}
2016-02-15 16:52:45 +01:00
}
2017-08-17 18:22:19 +02:00
< / code > < / div > < / pre >
2016-02-15 16:52:45 +01:00
2016-08-26 19:28:57 +02:00
< / div > < / main >
< footer > < div class = "container" >
< p > © 2013 Hajime Hoshi< / p >
2016-08-28 00:10:41 +02:00
< p > Code is licensed under < a href = "https://github.com/hajimehoshi/ebiten/blob/master/LICENSE" > the Apache License 2.0< / a > .< / p >
2016-08-26 19:28:57 +02:00
< p > The content of this page is licensed under < a href = "https://creativecommons.org/licenses/by/4.0/" > the Creative Commons Attribution 4.0 License< / a > .< / p >
< / div > < / footer >
2016-02-15 16:52:45 +01:00
2016-08-27 17:48:15 +02:00
< script src = "../scripts/highlight.pack.js" > < / script >
2016-08-27 07:00:06 +02:00
< script > hljs . initHighlightingOnLoad ( ) ; < / script >
