func realMain() {
initMaps()
canvas = html.NewCanvas(800, 480)
canvas.AddTo(js.Global.Get("document").Get("body"))
ctx = canvas.Context()
ctx.SetImageSmoothingEnabled(false)
audio := js.Global.Get("Audio").New()
if audio.Call("canPlayType", "audio/mpeg").Bool() {
audio.Set("type", "audio/mpeg")
audio.Set("src", "music/music.mp3")
} else {
audio.Set("type", "audio/ogg")
audio.Set("src", "music/music.ogg")
}
audio.Set("loop", true)
audio.Set("volume", 0.4)
audio.Call("play")
instructions := js.Global.Get("document").Call("createElement", "pre")
instructions.Set("innerHTML", `Instructions:
Try and kill as much as you can in one night (the time is takes for the moon to travel
across the sky).
Controls:
WASD - Move
W/Space - Jump
Hold W/Space whilst landing on a wall - Wall jump
Left click = Attack
Right click = Leap
`)
js.Global.Get("document").Get("body").Call("appendChild", instructions)
SetLevel(0)
html.RequestFrame(drawFrame)
}
func drawFrame(delta float64) {
if delta > 2.5 {
delta = 2.5
}
limit := 20
for len(entities) < 100 && player != nil && limit > 0 {
limit--
cx := float64(globalRand.Intn(25)) + 10
cy := float64(globalRand.Intn(25)) + 10
if globalRand.Float64() < 0.5 {
cx, cy = -cx, -cy
}
cx += player.X
cy += player.Y
t := GetTile(int(cx), int(cy))
if t != Empty && !t.IsSolid() {
AddEntity(NewPerson(cx, cy))
}
}
drawBackground(ctx, delta)
if moonPosition > math.Pi*2 && player != nil {
// Game over
RemoveEntity(player)
AddEntity(NewParticleSystem(ParticleSquare, html.NewRGBColor(0, 255, 0), 2, 30, player.X, player.Y))
AddEntity(NewParticleSystem(ParticleSquare, html.NewRGBColor(0, 0, 255), 1, 30, player.X, player.Y))
player = nil
audio := js.Global.Get("Audio").New()
if audio.Call("canPlayType", "audio/mpeg").Bool() {
audio.Set("type", "audio/mpeg")
audio.Set("src", "sound/bang.mp3")
} else {
audio.Set("type", "audio/ogg")
audio.Set("src", "sound/bangaaa.ogg")
}
audio.Set("volume", 0.4)
audio.Call("play")
}
// Move the camera to the player
if player != nil {
targetX := player.X*tileSize - 100
cameraX += (targetX - cameraX) * 0.2 * delta
if cameraX < 0 {
cameraX = 0
}
targetY := player.Y*tileSize - 100
cameraY += (targetY - cameraY) * 0.2 * delta
if cameraY < 0 {
cameraY = 0
}
}
ctx.Save()
ctx.Scale(2, 2)
Levels[currentMap].Draw(ctx)
ctx.Translate(-int(cameraX), -int(cameraY))
DrawEntities(ctx, delta)
ctx.Restore()
ctx.FillStyle = html.NewRGBColor(0, 0, 0)
ctx.FillRect(0, GameArea, 800, 480-GameArea)
html.RequestFrame(drawFrame)
ctx.FillStyle = html.NewRGBColor(255, 255, 255)
ctx.Font = "32px monospaced"
ctx.TextBaseline = html.Top
ctx.FillText("Kills: "+strconv.Itoa(kills), 10, GameArea+10)
}