121 lines
2.2 KiB
Go
121 lines
2.2 KiB
Go
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"image"
|
|
"math"
|
|
"os"
|
|
"time"
|
|
|
|
_ "image/png"
|
|
|
|
"github.com/faiface/pixel"
|
|
"github.com/faiface/pixel/pixelgl"
|
|
"golang.org/x/image/colornames"
|
|
"gitbutter.pw/zolfite/project-rpg/gameobjects"
|
|
)
|
|
|
|
func loadPicture(path string) (pixel.Picture, error) {
|
|
file, err := os.Open(path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer file.Close()
|
|
img, _, err := image.Decode(file)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return pixel.PictureDataFromImage(img), nil
|
|
}
|
|
|
|
func run() {
|
|
cfg := pixelgl.WindowConfig{
|
|
Title: "Project RPG",
|
|
Bounds: pixel.R(0, 0, 1024, 768),
|
|
VSync: true,
|
|
}
|
|
win, err := pixelgl.NewWindow(cfg)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
spritesheet, err := loadPicture("sprites.png")
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
//batch := pixel.NewBatch(&pixel.TrianglesData{}, spritesheet)
|
|
|
|
background, err := loadPicture("background.png")
|
|
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
bg := pixel.NewSprite(background, background.Bounds())
|
|
//batch := pixel.NewBatch(&pixel.TrianglesData{}, spritesheet)
|
|
|
|
var (
|
|
camPos = pixel.ZV
|
|
camZoom = 0.3
|
|
camZoomSpeed = 1.2
|
|
)
|
|
|
|
var (
|
|
frames = 0
|
|
second = time.Tick(time.Second)
|
|
)
|
|
player := gameobjects.NewPlayer(win, spritesheet)
|
|
|
|
var fps int64 = 60
|
|
timePerFrame := 1000000000 / fps
|
|
var lastTime int64 = time.Now().UnixNano()
|
|
var now int64
|
|
var dt int64
|
|
|
|
// Game Loop
|
|
for !win.Closed() {
|
|
now = time.Now().UnixNano()
|
|
dt += (now - lastTime)
|
|
lastTime = time.Now().UnixNano()
|
|
|
|
//Execute a frame.
|
|
if dt >= timePerFrame {
|
|
|
|
// *** Update begins *** //
|
|
|
|
cam := pixel.IM.Scaled(camPos, camZoom).Moved(win.Bounds().Center().Sub(camPos))
|
|
|
|
win.SetMatrix(cam)
|
|
|
|
player.Update(win, dt)
|
|
|
|
camPos.X = player.PlayerVec.X
|
|
camPos.Y = player.PlayerVec.Y
|
|
camZoom *= math.Pow(camZoomSpeed, win.MouseScroll().Y)
|
|
|
|
// *** Update Ends *** //
|
|
|
|
// *** Render begin *** //
|
|
win.Clear(colornames.Forestgreen)
|
|
bg.Draw(win, pixel.IM.Moved(win.Bounds().Center()))
|
|
player.Render(win)
|
|
|
|
//batch.Draw(win)
|
|
win.Update()
|
|
|
|
// *** Render End *** //
|
|
|
|
frames++
|
|
select {
|
|
case <-second:
|
|
win.SetTitle(fmt.Sprintf("%s | FPS: %d", cfg.Title, frames))
|
|
frames = 0
|
|
default:
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func main() {
|
|
pixelgl.Run(run)
|
|
}
|