2014-12-27 16:26:33 +01:00
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<!DOCTYPE html>
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<!--Copyright 2014 Hajime Hoshi
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.-->
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2014-12-27 22:18:23 +01:00
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<h1>Ebiten (海老天) v1.0.0-alpha</h1>
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2014-12-27 16:26:33 +01:00
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<ul>
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2014-12-27 22:18:23 +01:00
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<li>A simple 2D game library in Go</li>
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<li>Works on
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<ul>
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<li>Mac OS X</li>
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<li>Linux (maybe)</li>
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<li>Windows (possibly)</li>
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</ul>
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</li>
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<li><a href="http://godoc.org/github.com/hajimehoshi/ebiten">API Docs</a></li>
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<li><a href="http://github.com/hajimehoshi/ebiten">Source Code</a></li>
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2014-12-27 16:26:33 +01:00
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</ul>
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2014-12-27 22:18:23 +01:00
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<h2>Features</h2>
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2014-12-27 16:26:33 +01:00
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<ul>
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<li>2D Graphics</li>
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<li>Input (Mouse, Keyboard)</li>
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</ul>
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2014-12-27 22:18:23 +01:00
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<h2>Example</h2>
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<table>
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<tr>
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<td><pre><code>package main
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import (
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"github.com/hajimehoshi/ebiten"
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"github.com/hajimehoshi/ebiten/ebitenutil"
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_ "image/jpeg"
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"log"
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)
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const (
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screenWidth = 320
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screenHeight = 240
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)
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const mosaicRatio = 16
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var (
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gophersImage *ebiten.Image
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gophersRenderTarget *ebiten.Image
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)
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func update(screen *ebiten.Image) error {
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gophersRenderTarget.DrawImage(gophersImage, &ebiten.DrawImageOptions{
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GeoM: ebiten.ScaleGeo(1.0/mosaicRatio, 1.0/mosaicRatio),
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})
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screen.DrawImage(gophersRenderTarget, &ebiten.DrawImageOptions{
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GeoM: ebiten.ScaleGeo(mosaicRatio, mosaicRatio),
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})
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return nil
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}
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func main() {
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var err error
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gophersImage, _, err = ebitenutil.NewImageFromFile("images/gophers.jpg", ebiten.FilterNearest)
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if err != nil {
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log.Fatal(err)
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}
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w, h := gophersImage.Size()
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gophersRenderTarget, err = ebiten.NewImage(w/mosaicRatio, h/mosaicRatio, ebiten.FilterNearest)
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if err != nil {
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log.Fatal(err)
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}
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if err := ebiten.Run(update, screenWidth, screenHeight, 2, "Mosaic (Ebiten Demo)"); err != nil {
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log.Fatal(err)
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}
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}
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</code></pre></td>
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<td><img src="mosaic.gif" width="320" height="240"></td>
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</tr>
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<tr>
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<td><pre><code>package main
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import (
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"github.com/hajimehoshi/ebiten"
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"github.com/hajimehoshi/ebiten/ebitenutil"
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"image"
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_ "image/jpeg"
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"log"
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)
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const (
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screenWidth = 320
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screenHeight = 240
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)
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var (
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gophersImage *ebiten.Image
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)
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func update(screen *ebiten.Image) error {
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parts := []ebiten.ImagePart{}
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w, h := gophersImage.Size()
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for i := 0; i < h; i++ {
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width := w + i*3/4
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x := ((h - i) * 3 / 4) / 2
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parts = append(parts, ebiten.ImagePart{
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Dst: image.Rect(x, i, x+width, i+1),
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Src: image.Rect(0, i, w, i+1),
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})
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}
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maxWidth := float64(w) + float64(h)*0.75
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geo := ebiten.TranslateGeo(-maxWidth/2, -float64(h)/2)
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geo.Concat(ebiten.TranslateGeo(screenWidth/2, screenHeight/2))
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screen.DrawImage(gophersImage, &ebiten.DrawImageOptions{
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Parts: parts,
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GeoM: geo,
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})
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return nil
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}
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func main() {
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var err error
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gophersImage, _, err = ebitenutil.NewImageFromFile("images/gophers.jpg", ebiten.FilterNearest)
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if err != nil {
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log.Fatal(err)
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}
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if err := ebiten.Run(update, screenWidth, screenHeight, 2, "Perspective (Ebiten Demo)"); err != nil {
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log.Fatal(err)
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}
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}
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</code></pre></td>
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<td><img src="perspective.gif" width="320" height="240"></td>
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</tr>
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<tr>
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<td><pre><code>package main
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import (
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"github.com/hajimehoshi/ebiten"
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"github.com/hajimehoshi/ebiten/ebitenutil"
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_ "image/jpeg"
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"log"
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"math"
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)
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const (
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screenWidth = 320
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screenHeight = 240
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)
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var (
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count int
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horizontalCount int
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verticalCount int
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gophersImage *ebiten.Image
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)
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func update(screen *ebiten.Image) error {
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count++
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if ebiten.IsKeyPressed(ebiten.KeyLeft) {
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horizontalCount--
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}
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if ebiten.IsKeyPressed(ebiten.KeyRight) {
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horizontalCount++
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}
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if ebiten.IsKeyPressed(ebiten.KeyDown) {
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verticalCount--
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}
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if ebiten.IsKeyPressed(ebiten.KeyUp) {
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verticalCount++
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}
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w, h := gophersImage.Size()
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geo := ebiten.TranslateGeo(-float64(w)/2, -float64(h)/2)
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scaleX := math.Pow(1.05, float64(horizontalCount))
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scaleY := math.Pow(1.05, float64(verticalCount))
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geo.Concat(ebiten.ScaleGeo(scaleX, scaleY))
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geo.Concat(ebiten.RotateGeo(float64(count%720) * 2 * math.Pi / 720))
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geo.Concat(ebiten.TranslateGeo(screenWidth/2, screenHeight/2))
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if err := screen.DrawImage(gophersImage, &ebiten.DrawImageOptions{
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GeoM: geo,
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}); err != nil {
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return err
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}
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return nil
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}
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func main() {
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var err error
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gophersImage, _, err = ebitenutil.NewImageFromFile("images/gophers.jpg", ebiten.FilterNearest)
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if err != nil {
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log.Fatal(err)
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}
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if err := ebiten.Run(update, screenWidth, screenHeight, 2, "Image (Ebiten Demo)"); err != nil {
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log.Fatal(err)
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}
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}
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</code></pre></td>
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<td><img src="rotate.gif" width="320" height="240"></td>
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</tr>
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</table>
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<h2>Install on Mac OS X</h2>
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2014-12-27 16:26:33 +01:00
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<pre><code>:; brew install glew
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:; brew install glfw3 # or homebrew/versions/glfw3
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2014-12-27 22:18:23 +01:00
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:; go get -u github.com/hajimehoshi/ebiten</code></pre>
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2014-12-27 16:26:33 +01:00
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2014-12-27 22:18:23 +01:00
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<h2>Execute the example</h2>
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2014-12-27 16:26:33 +01:00
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<pre><code>:; cd $GOHOME/src/github.com/hajimehoshi/ebiten/example
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2014-12-27 22:18:23 +01:00
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:; go run rotate/main.go</code></pre>
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2014-12-27 16:26:33 +01:00
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2014-12-27 22:18:23 +01:00
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<h2>License</h2>
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2014-12-27 16:26:33 +01:00
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<pre><code>Copyright 2014 Hajime Hoshi
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2014-12-27 22:18:23 +01:00
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Licensed under the Apache License, Version 2.0 (the "License");
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2014-12-27 16:26:33 +01:00
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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2014-12-27 22:18:23 +01:00
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distributed under the License is distributed on an "AS IS" BASIS,
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2014-12-27 16:26:33 +01:00
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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2014-12-27 22:18:23 +01:00
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limitations under the License.</code></pre>
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