Created
June 14, 2021 02:27
-
-
Save kumagi/d9bb36eeb453614b94667717cb727097 to your computer and use it in GitHub Desktop.
青い●がいっぱい動くサンプル
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| package main | |
| import ( | |
| "log" | |
| "time" | |
| "image/color" | |
| "golang.org/x/image/font" | |
| "golang.org/x/image/font/opentype" | |
| "math/rand" | |
| "github.com/hajimehoshi/ebiten/v2/examples/resources/fonts" | |
| "github.com/hajimehoshi/ebiten/v2" | |
| "github.com/hajimehoshi/ebiten/v2/text" | |
| ) | |
| const ( | |
| screenWidth = 640 | |
| screenHeight = 480 | |
| dotCount = 4096 | |
| ) | |
| var ( | |
| runnerImage *ebiten.Image | |
| ) | |
| type Dot struct { | |
| x, y, dx, dy float64 | |
| } | |
| func (d *Dot) Init() { | |
| d.x = rand.Float64() * float64(screenWidth) * 1.2 | |
| d.y = rand.Float64() * float64(screenHeight) * 1.2 | |
| d.dx = 0 | |
| d.dy = 0 | |
| } | |
| type Game struct { | |
| dots [dotCount]Dot | |
| dotImage *ebiten.Image | |
| } | |
| func NewGame() *Game { | |
| g := new(Game) | |
| for i := 0; i < dotCount; i++ { | |
| g.dots[i].Init() | |
| } | |
| tt, err := opentype.Parse(fonts.MPlus1pRegular_ttf) | |
| if err != nil { | |
| log.Fatal(err) | |
| } | |
| mplusNormalFont, err := opentype.NewFace(tt, &opentype.FaceOptions{ | |
| Size: 18, | |
| DPI: 72, | |
| Hinting: font.HintingFull, | |
| }) | |
| if err != nil { | |
| log.Fatal(err) | |
| } | |
| g.dotImage = ebiten.NewImage(20, 20) | |
| text.Draw(g.dotImage, "●", mplusNormalFont, 0, 18, | |
| color.RGBA{0x10, 0x30, 0x40, 0xff}) | |
| return g; | |
| } | |
| func (g *Game) Update() error { | |
| for i := 0; i < dotCount; i++ { | |
| g.dots[i].x += g.dots[i].dx / 8 | |
| g.dots[i].y += g.dots[i].dy / 7 | |
| if screenWidth / 2 < g.dots[i].x { | |
| g.dots[i].dx-- | |
| } else { | |
| g.dots[i].dx++ | |
| } | |
| if screenHeight / 2 < g.dots[i].y { | |
| g.dots[i].dy-- | |
| } else { | |
| g.dots[i].dy++ | |
| } | |
| } | |
| return nil | |
| } | |
| func (g *Game) Draw(screen *ebiten.Image) { | |
| for i := 0; i < dotCount; i++ { | |
| op := &ebiten.DrawImageOptions{} | |
| op.CompositeMode = ebiten.CompositeModeLighter | |
| op.GeoM.Translate(g.dots[i].x, g.dots[i].y) | |
| screen.DrawImage(g.dotImage, op) | |
| } | |
| } | |
| func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) { | |
| return screenWidth, screenHeight | |
| } | |
| func main() { | |
| rand.Seed(time.Now().UnixNano()) | |
| ebiten.SetWindowSize(screenWidth, screenHeight) | |
| if err := ebiten.RunGame(NewGame()); err != nil { | |
| log.Fatal(err) | |
| } | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment