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alien.go
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/
alien.go
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package main
import (
"log"
"math/rand"
"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/ebitenutil"
)
type Alien struct {
Image *ebiten.Image
Width int
Height int
X float64
Y float64
SpeedFactor float64
LeftMove bool
HitNumber int
}
func (this Alien) Draw(screen *ebiten.Image) {
op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(this.X, this.Y)
screen.DrawImage(this.Image, op)
}
func NewAlien(cfg *Config) *Alien {
img, _, err := ebitenutil.NewImageFromFile("./asset/alien.png")
if err != nil {
log.Fatal(err)
}
s := img.Bounds().Size()
return &Alien{
Image: img,
Width: s.X,
Height: s.Y,
X: 0,
Y: 0,
SpeedFactor: cfg.AlienSpeedFactor,
LeftMove: rand.Intn(100) > 50,
HitNumber: rand.Intn(3),
}
}