99 lines
2.2 KiB
Go
99 lines
2.2 KiB
Go
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// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build darwin linux
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// Flappy Gopher is a simple one-button game that uses the
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// mobile framework and the experimental sprite engine.
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package main
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import (
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"math/rand"
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"time"
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"golang.org/x/mobile/app"
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"golang.org/x/mobile/event/key"
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"golang.org/x/mobile/event/lifecycle"
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"golang.org/x/mobile/event/paint"
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"golang.org/x/mobile/event/size"
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"golang.org/x/mobile/event/touch"
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"golang.org/x/mobile/exp/gl/glutil"
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"golang.org/x/mobile/exp/sprite"
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"golang.org/x/mobile/exp/sprite/clock"
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"golang.org/x/mobile/exp/sprite/glsprite"
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"golang.org/x/mobile/gl"
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)
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func main() {
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rand.Seed(time.Now().UnixNano())
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app.Main(func(a app.App) {
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var glctx gl.Context
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var sz size.Event
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for e := range a.Events() {
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switch e := a.Filter(e).(type) {
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case lifecycle.Event:
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switch e.Crosses(lifecycle.StageVisible) {
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case lifecycle.CrossOn:
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glctx, _ = e.DrawContext.(gl.Context)
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onStart(glctx)
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a.Send(paint.Event{})
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case lifecycle.CrossOff:
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onStop()
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glctx = nil
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}
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case size.Event:
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sz = e
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case paint.Event:
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if glctx == nil || e.External {
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continue
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}
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onPaint(glctx, sz)
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a.Publish()
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a.Send(paint.Event{}) // keep animating
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case touch.Event:
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if down := e.Type == touch.TypeBegin; down || e.Type == touch.TypeEnd {
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game.Press(down)
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}
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case key.Event:
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if e.Code != key.CodeSpacebar {
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break
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}
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if down := e.Direction == key.DirPress; down || e.Direction == key.DirRelease {
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game.Press(down)
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}
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}
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}
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})
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}
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var (
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startTime = time.Now()
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images *glutil.Images
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eng sprite.Engine
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scene *sprite.Node
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game *Game
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)
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func onStart(glctx gl.Context) {
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images = glutil.NewImages(glctx)
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eng = glsprite.Engine(images)
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game = NewGame()
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scene = game.Scene(eng)
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}
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func onStop() {
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eng.Release()
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images.Release()
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game = nil
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}
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func onPaint(glctx gl.Context, sz size.Event) {
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glctx.ClearColor(1, 1, 1, 1)
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glctx.Clear(gl.COLOR_BUFFER_BIT)
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now := clock.Time(time.Since(startTime) * 60 / time.Second)
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game.Update(now)
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eng.Render(scene, now, sz)
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}
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