176 lines
2.8 KiB
Go
176 lines
2.8 KiB
Go
package main
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import (
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"bytes"
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"embed"
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_ "embed"
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"image"
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_ "image/png"
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"io/fs"
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"log"
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"math"
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"math/rand"
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"path/filepath"
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"strings"
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"time"
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"github.com/hajimehoshi/ebiten/v2"
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)
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const (
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scale = 2.0
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width = 32 * scale
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height = 32 * scale
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)
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var (
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mSprite map[string]*ebiten.Image
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//go:embed assets/*.png
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f embed.FS
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)
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type neko struct {
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x int
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y int
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distance int
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count int
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sprite string
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}
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func (m *neko) Layout(outsideWidth, outsideHeight int) (int, int) {
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return width, height
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}
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func (m *neko) Update() error {
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mx, my := ebiten.CursorPosition()
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m.count++
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//sw, sh := ebiten.ScreenSizeInFullscreen()
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// set the window position
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ebiten.SetWindowPosition(m.x, m.y)
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x := mx - (height / 2)
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y := my - (width / 2)
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// get distance from sprite to mouse
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dy, dx := y, x
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if dy < 0 {
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dy = dy * (-1)
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}
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if dx < 0 {
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dx = dx * (-1)
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}
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m.distance = dx + dy
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if m.distance < width {
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// idle state
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m.sprite = "wash"
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return nil
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}
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// get mouse direction
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r := math.Atan2(float64(y), float64(x))
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tr := 0.0
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if r <= 0 {
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tr = 360
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}
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a := (r / math.Pi * 180) + tr
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switch {
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case a <= 292.5 && a > 247.5:
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m.y--
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case a <= 337.5 && a > 292.5:
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m.x++
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m.y--
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case a <= 22.5 || a > 337.5:
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m.x++
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case a <= 67.5 && a > 22.5:
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m.x++
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m.y++
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case a <= 112.5 && a > 67.5:
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m.y++
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case a <= 157.5 && a > 112.5:
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m.x--
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m.y++
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case a <= 202.5 && a > 157.5:
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m.x--
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case a <= 247.5 && a > 202.5:
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m.x--
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m.y--
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}
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switch {
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case a < 292 && a > 247:
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m.sprite = "up"
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case a < 337 && a > 292:
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m.sprite = "upright"
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case a < 22 || a > 337:
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m.sprite = "right"
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case a < 67 && a > 22:
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m.sprite = "downright"
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case a < 112 && a > 67:
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m.sprite = "down"
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case a < 157 && a > 112:
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m.sprite = "downleft"
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case a < 202 && a > 157:
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m.sprite = "left"
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case a < 247 && a > 202:
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m.sprite = "upleft"
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}
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return nil
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}
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func (m *neko) Draw(screen *ebiten.Image) {
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img := mSprite["up1"]
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switch {
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case m.count < 8:
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img = mSprite[m.sprite+"1"]
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default:
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img = mSprite[m.sprite+"2"]
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}
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if m.count > 16 {
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m.count = 0
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}
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op := &ebiten.DrawImageOptions{}
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op.GeoM.Scale(scale, scale)
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screen.DrawImage(img, op)
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}
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func main() {
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rand.Seed(time.Now().UnixNano())
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mSprite = make(map[string]*ebiten.Image)
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a, _ := fs.ReadDir(f, "assets")
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for _, v := range a {
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data, _ := f.ReadFile("assets/" + v.Name())
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img, _, err := image.Decode(bytes.NewReader(data))
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if err != nil {
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log.Fatal(err)
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}
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name := strings.TrimSuffix(v.Name(), filepath.Ext(v.Name()))
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mSprite[name] = ebiten.NewImageFromImage(img)
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//fmt.Printf("%q\n", name)
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}
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sw, sh := ebiten.ScreenSizeInFullscreen()
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n := &neko{
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x: sw / 2,
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y: sh / 2,
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}
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ebiten.SetScreenTransparent(true)
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ebiten.SetWindowDecorated(false)
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ebiten.SetWindowFloating(true)
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ebiten.SetWindowSize(width, height)
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err := ebiten.RunGame(n)
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if err != nil {
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log.Fatal(err)
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}
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}
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