132 lines
2.5 KiB
Go
132 lines
2.5 KiB
Go
package main
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import (
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"fmt"
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"image"
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"math"
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"os"
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"time"
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_ "image/png"
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"github.com/faiface/pixel"
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"github.com/faiface/pixel/pixelgl"
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"golang.org/x/image/colornames"
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)
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func loadPicture(path string) (pixel.Picture, error) {
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file, err := os.Open(path)
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if err != nil {
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return nil, err
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}
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defer file.Close()
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img, _, err := image.Decode(file)
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if err != nil {
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return nil, err
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}
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return pixel.PictureDataFromImage(img), nil
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}
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func run() {
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cfg := pixelgl.WindowConfig{
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Title: "Pixel Rocks!",
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Bounds: pixel.R(0, 0, 1024, 768),
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VSync: true,
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}
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win, err := pixelgl.NewWindow(cfg)
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if err != nil {
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panic(err)
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}
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spritesheet, err := loadPicture("sprites.png")
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if err != nil {
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panic(err)
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}
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background, err := loadPicture("background.png")
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if err != nil {
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panic(err)
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}
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//batch := pixel.NewBatch(&pixel.TrianglesData{}, spritesheet)
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var spritesFrames []pixel.Rect
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for x := spritesheet.Bounds().Min.X; x < spritesheet.Bounds().Max.X; x += 32 {
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for y := spritesheet.Bounds().Min.Y; y < spritesheet.Bounds().Max.Y; y += 32 {
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spritesFrames = append(spritesFrames, pixel.R(x, y, x+79, y+92))
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}
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}
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var (
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camPos = pixel.ZV
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camSpeed = 500.0
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camZoom = 0.3
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camZoomSpeed = 1.2
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)
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var (
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frames = 0
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second = time.Tick(time.Second)
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)
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playerX := win.Bounds().Max.X / 2
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playerY := win.Bounds().Max.Y / 2
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var (
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playerXY = pixel.Vec{
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playerX,
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playerY,
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}
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)
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last := time.Now()
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for !win.Closed() {
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dt := time.Since(last).Seconds()
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last = time.Now()
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playerXY = pixel.Vec{
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playerX,
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playerY,
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}
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cam := pixel.IM.Scaled(camPos, camZoom).Moved(win.Bounds().Center().Sub(camPos))
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win.SetMatrix(cam)
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bg := pixel.NewSprite(background, background.Bounds())
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Sprite := pixel.NewSprite(spritesheet, spritesFrames[3])
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//mouse := cam.Unproject(win.MousePosition())
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win.Clear(colornames.Forestgreen)
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bg.Draw(win, pixel.IM.Moved(win.Bounds().Center()))
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Sprite.Draw(win, pixel.IM.Scaled(pixel.ZV, 4).Moved(playerXY))
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if win.Pressed(pixelgl.KeyA) {
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playerX -= camSpeed * dt
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}
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camPos.X = playerX
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camPos.Y = playerY
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if win.Pressed(pixelgl.KeyD) {
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playerX += camSpeed * dt
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}
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if win.Pressed(pixelgl.KeyS) {
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playerY -= camSpeed * dt
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}
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if win.Pressed(pixelgl.KeyW) {
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playerY += camSpeed * dt
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}
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camZoom *= math.Pow(camZoomSpeed, win.MouseScroll().Y)
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//batch.Draw(win)
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win.Update()
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frames++
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select {
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case <-second:
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win.SetTitle(fmt.Sprintf("%s | FPS: %d", cfg.Title, frames))
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frames = 0
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default:
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}
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}
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}
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func main() {
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pixelgl.Run(run)
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}
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