mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-27 20:28:54 +01:00
141 lines
4.3 KiB
HTML
141 lines
4.3 KiB
HTML
<!DOCTYPE html>
|
|
<link rel="shortcut icon" href="../favicon.png" type="image/png" >
|
|
<link rel="icon" href="../favicon.png" type="image/png" >
|
|
<title>Ebiten example - paint</title>
|
|
<link rel="stylesheet" href="/stylesheets/bootstrap.min.css">
|
|
<link rel="stylesheet" href="/stylesheets/highlight-github.css">
|
|
<link rel="stylesheet" href="/stylesheets/ebiten.css">
|
|
|
|
<header class="navbar"><div class="container">
|
|
<div class="navbar-header">
|
|
<a class="navbar-brand" href="/">Ebiten</a>
|
|
</div>
|
|
<nav class="collapse navbar-collapse">
|
|
<ul class="nav navbar-nav navbar-right">
|
|
<li><a href="https://github.com/hajimehoshi/ebiten">GitHub</a></li>
|
|
<li><a href="http://godoc.org/github.com/hajimehoshi/ebiten">GoDoc</a></li>
|
|
<li><a href="https://github.com/hajimehoshi/ebiten/wiki">Wiki</a>
|
|
</ul>
|
|
</nav>
|
|
</header>
|
|
|
|
<main><div class="container">
|
|
|
|
<h2>Ebiten example - paint</h2>
|
|
<iframe src="paint.content.html" width="640" height="480"></iframe>
|
|
<pre><code class="language-go">// +build example
|
|
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"image"
|
|
"image/color"
|
|
"log"
|
|
"math"
|
|
|
|
"github.com/hajimehoshi/ebiten"
|
|
"github.com/hajimehoshi/ebiten/ebitenutil"
|
|
)
|
|
|
|
const (
|
|
screenWidth = 320
|
|
screenHeight = 240
|
|
)
|
|
|
|
var (
|
|
count int
|
|
brushImage *ebiten.Image
|
|
canvasImage *ebiten.Image
|
|
)
|
|
|
|
func paint(screen *ebiten.Image, x, y int) error {
|
|
op := &ebiten.DrawImageOptions{}
|
|
op.GeoM.Translate(float64(x), float64(y))
|
|
op.ColorM.Scale(1.0, 0.50, 0.125, 1.0)
|
|
theta := 2.0 * math.Pi * float64(count%60) / ebiten.FPS
|
|
op.ColorM.RotateHue(theta)
|
|
if err := canvasImage.DrawImage(brushImage, op); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func update(screen *ebiten.Image) error {
|
|
drawn := false
|
|
mx, my := ebiten.CursorPosition()
|
|
if ebiten.IsMouseButtonPressed(ebiten.MouseButtonLeft) {
|
|
if err := paint(screen, mx, my); err != nil {
|
|
return err
|
|
}
|
|
drawn = true
|
|
}
|
|
for _, t := range ebiten.Touches() {
|
|
x, y := t.Position()
|
|
if err := paint(screen, x, y); err != nil {
|
|
return err
|
|
}
|
|
drawn = true
|
|
}
|
|
if drawn {
|
|
count++
|
|
}
|
|
|
|
if err := screen.DrawImage(canvasImage, nil); err != nil {
|
|
return err
|
|
}
|
|
|
|
msg := fmt.Sprintf("(%d, %d)", mx, my)
|
|
for _, t := range ebiten.Touches() {
|
|
x, y := t.Position()
|
|
msg += fmt.Sprintf("\n(%d, %d) touch %d", x, y, t.ID())
|
|
}
|
|
if err := ebitenutil.DebugPrint(screen, msg); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func main() {
|
|
var err error
|
|
const a0, a1, a2 = 0x40, 0xc0, 0xff
|
|
pixels := []uint8{
|
|
a0, a1, a1, a0,
|
|
a1, a2, a2, a1,
|
|
a1, a2, a2, a1,
|
|
a0, a1, a1, a0,
|
|
}
|
|
brushImage, err = ebiten.NewImageFromImage(&image.Alpha{
|
|
Pix: pixels,
|
|
Stride: 4,
|
|
Rect: image.Rect(0, 0, 4, 4),
|
|
}, ebiten.FilterNearest)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
canvasImage, err = ebiten.NewImage(screenWidth, screenHeight, ebiten.FilterNearest)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
if err := canvasImage.Fill(color.White); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
if err := ebiten.Run(update, screenWidth, screenHeight, 2, "Paint (Ebiten Demo)"); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|
|
</code></pre>
|
|
|
|
</div></main>
|
|
|
|
<footer><div class="container">
|
|
<p>© 2013 Hajime Hoshi</p>
|
|
<p>Code is licensed under <a href="https://github.com/hajimehoshi/ebiten/blob/master/LICENSE">Apache License 2.0</a>.</p>
|
|
<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>
|
|
|
|
<script src="/scripts/highlight.pack.js"></script>
|
|
<script>hljs.initHighlightingOnLoad();</script>
|