ebiten/_docs/public/index.html
2014-12-28 06:18:23 +09:00

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<!DOCTYPE html>
<!--Copyright 2014 Hajime Hoshi
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.-->
<h1>Ebiten (海老天) v1.0.0-alpha</h1>
<ul>
<li>A simple 2D game library in Go</li>
<li>Works on
<ul>
<li>Mac OS X</li>
<li>Linux (maybe)</li>
<li>Windows (possibly)</li>
</ul>
</li>
<li><a href="http://godoc.org/github.com/hajimehoshi/ebiten">API Docs</a></li>
<li><a href="http://github.com/hajimehoshi/ebiten">Source Code</a></li>
</ul>
<h2>Features</h2>
<ul>
<li>2D Graphics</li>
<li>Input (Mouse, Keyboard)</li>
</ul>
<h2>Example</h2>
<table>
<tr>
<td><pre><code>package main
import (
&#34;github.com/hajimehoshi/ebiten&#34;
&#34;github.com/hajimehoshi/ebiten/ebitenutil&#34;
_ &#34;image/jpeg&#34;
&#34;log&#34;
)
const (
screenWidth = 320
screenHeight = 240
)
const mosaicRatio = 16
var (
gophersImage *ebiten.Image
gophersRenderTarget *ebiten.Image
)
func update(screen *ebiten.Image) error {
gophersRenderTarget.DrawImage(gophersImage, &amp;ebiten.DrawImageOptions{
GeoM: ebiten.ScaleGeo(1.0/mosaicRatio, 1.0/mosaicRatio),
})
screen.DrawImage(gophersRenderTarget, &amp;ebiten.DrawImageOptions{
GeoM: ebiten.ScaleGeo(mosaicRatio, mosaicRatio),
})
return nil
}
func main() {
var err error
gophersImage, _, err = ebitenutil.NewImageFromFile(&#34;images/gophers.jpg&#34;, ebiten.FilterNearest)
if err != nil {
log.Fatal(err)
}
w, h := gophersImage.Size()
gophersRenderTarget, err = ebiten.NewImage(w/mosaicRatio, h/mosaicRatio, ebiten.FilterNearest)
if err != nil {
log.Fatal(err)
}
if err := ebiten.Run(update, screenWidth, screenHeight, 2, &#34;Mosaic (Ebiten Demo)&#34;); err != nil {
log.Fatal(err)
}
}
</code></pre></td>
<td><img src="mosaic.gif" width="320" height="240"></td>
</tr>
<tr>
<td><pre><code>package main
import (
&#34;github.com/hajimehoshi/ebiten&#34;
&#34;github.com/hajimehoshi/ebiten/ebitenutil&#34;
&#34;image&#34;
_ &#34;image/jpeg&#34;
&#34;log&#34;
)
const (
screenWidth = 320
screenHeight = 240
)
var (
gophersImage *ebiten.Image
)
func update(screen *ebiten.Image) error {
parts := []ebiten.ImagePart{}
w, h := gophersImage.Size()
for i := 0; i &lt; h; i&#43;&#43; {
width := w &#43; i*3/4
x := ((h - i) * 3 / 4) / 2
parts = append(parts, ebiten.ImagePart{
Dst: image.Rect(x, i, x&#43;width, i&#43;1),
Src: image.Rect(0, i, w, i&#43;1),
})
}
maxWidth := float64(w) &#43; float64(h)*0.75
geo := ebiten.TranslateGeo(-maxWidth/2, -float64(h)/2)
geo.Concat(ebiten.TranslateGeo(screenWidth/2, screenHeight/2))
screen.DrawImage(gophersImage, &amp;ebiten.DrawImageOptions{
Parts: parts,
GeoM: geo,
})
return nil
}
func main() {
var err error
gophersImage, _, err = ebitenutil.NewImageFromFile(&#34;images/gophers.jpg&#34;, ebiten.FilterNearest)
if err != nil {
log.Fatal(err)
}
if err := ebiten.Run(update, screenWidth, screenHeight, 2, &#34;Perspective (Ebiten Demo)&#34;); err != nil {
log.Fatal(err)
}
}
</code></pre></td>
<td><img src="perspective.gif" width="320" height="240"></td>
</tr>
<tr>
<td><pre><code>package main
import (
&#34;github.com/hajimehoshi/ebiten&#34;
&#34;github.com/hajimehoshi/ebiten/ebitenutil&#34;
_ &#34;image/jpeg&#34;
&#34;log&#34;
&#34;math&#34;
)
const (
screenWidth = 320
screenHeight = 240
)
var (
count int
horizontalCount int
verticalCount int
gophersImage *ebiten.Image
)
func update(screen *ebiten.Image) error {
count&#43;&#43;
if ebiten.IsKeyPressed(ebiten.KeyLeft) {
horizontalCount--
}
if ebiten.IsKeyPressed(ebiten.KeyRight) {
horizontalCount&#43;&#43;
}
if ebiten.IsKeyPressed(ebiten.KeyDown) {
verticalCount--
}
if ebiten.IsKeyPressed(ebiten.KeyUp) {
verticalCount&#43;&#43;
}
w, h := gophersImage.Size()
geo := ebiten.TranslateGeo(-float64(w)/2, -float64(h)/2)
scaleX := math.Pow(1.05, float64(horizontalCount))
scaleY := math.Pow(1.05, float64(verticalCount))
geo.Concat(ebiten.ScaleGeo(scaleX, scaleY))
geo.Concat(ebiten.RotateGeo(float64(count%720) * 2 * math.Pi / 720))
geo.Concat(ebiten.TranslateGeo(screenWidth/2, screenHeight/2))
if err := screen.DrawImage(gophersImage, &amp;ebiten.DrawImageOptions{
GeoM: geo,
}); err != nil {
return err
}
return nil
}
func main() {
var err error
gophersImage, _, err = ebitenutil.NewImageFromFile(&#34;images/gophers.jpg&#34;, ebiten.FilterNearest)
if err != nil {
log.Fatal(err)
}
if err := ebiten.Run(update, screenWidth, screenHeight, 2, &#34;Image (Ebiten Demo)&#34;); err != nil {
log.Fatal(err)
}
}
</code></pre></td>
<td><img src="rotate.gif" width="320" height="240"></td>
</tr>
</table>
<h2>Install on Mac OS X</h2>
<pre><code>:; brew install glew
:; brew install glfw3 # or homebrew/versions/glfw3
:; go get -u github.com/hajimehoshi/ebiten</code></pre>
<h2>Execute the example</h2>
<pre><code>:; cd $GOHOME/src/github.com/hajimehoshi/ebiten/example
:; go run rotate/main.go</code></pre>
<h2>License</h2>
<pre><code>Copyright 2014 Hajime Hoshi
Licensed under the Apache License, Version 2.0 (the &#34;License&#34;);
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an &#34;AS IS&#34; BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.</code></pre>