func run() int {
var window *sdl.Window
var renderer *sdl.Renderer
var points []sdl.Point
var rect sdl.Rect
var rects []sdl.Rect
window, err := sdl.CreateWindow(winTitle, sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED,
winWidth, winHeight, sdl.WINDOW_SHOWN)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create window: %s\n", err)
return 1
}
defer window.Destroy()
renderer, err = sdl.CreateRenderer(window, -1, sdl.RENDERER_ACCELERATED)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create renderer: %s\n", err)
return 2
}
defer renderer.Destroy()
renderer.Clear()
renderer.SetDrawColor(255, 255, 255, 255)
renderer.DrawPoint(150, 300)
renderer.SetDrawColor(0, 0, 255, 255)
renderer.DrawLine(0, 0, 200, 200)
points = []sdl.Point{{0, 0}, {100, 300}, {100, 300}, {200, 0}}
renderer.SetDrawColor(255, 255, 0, 255)
renderer.DrawLines(points)
rect = sdl.Rect{300, 0, 200, 200}
renderer.SetDrawColor(255, 0, 0, 255)
renderer.DrawRect(&rect)
rects = []sdl.Rect{{400, 400, 100, 100}, {550, 350, 200, 200}}
renderer.SetDrawColor(0, 255, 255, 255)
renderer.DrawRects(rects)
rect = sdl.Rect{250, 250, 200, 200}
renderer.SetDrawColor(0, 255, 0, 255)
renderer.FillRect(&rect)
rects = []sdl.Rect{{500, 300, 100, 100}, {200, 300, 200, 200}}
renderer.SetDrawColor(255, 0, 255, 255)
renderer.FillRects(rects)
renderer.Present()
sdl.Delay(2000)
return 0
}
func run() int {
var window *sdl.Window
var renderer *sdl.Renderer
var texture *sdl.Texture
var src, dst sdl.Rect
var err error
window, err = sdl.CreateWindow(winTitle, sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED,
winWidth, winHeight, sdl.WINDOW_SHOWN)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create window: %s\n", err)
return 1
}
defer window.Destroy()
renderer, err = sdl.CreateRenderer(window, -1, sdl.RENDERER_ACCELERATED)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create renderer: %s\n", err)
return 2
}
defer renderer.Destroy()
image, err := img.Load(imageName)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to load PNG: %s\n", err)
return 3
}
defer image.Free()
texture, err = renderer.CreateTextureFromSurface(image)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create texture: %s\n", err)
return 4
}
defer texture.Destroy()
src = sdl.Rect{0, 0, 512, 512}
dst = sdl.Rect{100, 50, 512, 512}
renderer.Clear()
renderer.SetDrawColor(255, 0, 0, 255)
renderer.FillRect(&sdl.Rect{0, 0, int32(winWidth), int32(winHeight)})
renderer.Copy(texture, &src, &dst)
renderer.Present()
sdl.Delay(2000)
return 0
}
func main() {
var window *sdl.Window
var renderer *sdl.Renderer
var texture *sdl.Texture
var src, dst sdl.Rect
window = sdl.CreateWindow(winTitle, sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED,
winWidth, winHeight, sdl.WINDOW_SHOWN)
if window == nil {
fmt.Fprintf(os.Stderr, "Failed to create window: %s\n", sdl.GetError())
os.Exit(1)
}
renderer = sdl.CreateRenderer(window, -1, sdl.RENDERER_ACCELERATED)
if renderer == nil {
fmt.Fprintf(os.Stderr, "Failed to create renderer: %s\n", sdl.GetError())
os.Exit(2)
}
image := img.Load(imageName)
if image == nil {
fmt.Fprintf(os.Stderr, "Failed to load PNG: %s\n", sdl.GetError())
os.Exit(3)
}
texture = renderer.CreateTextureFromSurface(image)
if texture == nil {
fmt.Fprintf(os.Stderr, "Failed to create texture: %s\n", sdl.GetError())
os.Exit(4)
}
src = sdl.Rect{0, 0, 512, 512}
dst = sdl.Rect{100, 50, 512, 512}
renderer.Clear()
renderer.SetDrawColor(255, 0, 0, 255)
renderer.FillRect(&sdl.Rect{0, 0, int32(winWidth), int32(winHeight)})
renderer.Copy(texture, &src, &dst)
renderer.Present()
sdl.Delay(2000)
image.Free()
texture.Destroy()
renderer.Destroy()
window.Destroy()
}
func main() {
var window *sdl.Window
var renderer *sdl.Renderer
var image *sdl.Surface
var texture *sdl.Texture
var src, dst sdl.Rect
var err error
window, err = sdl.CreateWindow(winTitle, sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED,
winWidth, winHeight, sdl.WINDOW_SHOWN)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create window: %s\n", err)
os.Exit(1)
}
defer window.Destroy()
renderer, err = sdl.CreateRenderer(window, -1, sdl.RENDERER_ACCELERATED)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create renderer: %s\n", err)
os.Exit(2)
}
defer renderer.Destroy()
image, err = sdl.LoadBMP(imageName)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to load BMP: %s\n", err)
os.Exit(3)
}
defer image.Free()
texture, err = renderer.CreateTextureFromSurface(image)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create texture: %s\n", err)
os.Exit(4)
}
defer texture.Destroy()
src = sdl.Rect{0, 0, 512, 512}
dst = sdl.Rect{100, 50, 512, 512}
renderer.Clear()
renderer.Copy(texture, &src, &dst)
renderer.Present()
sdl.Delay(2000)
}
func run(serverStr, name string) int {
var window *sdl.Window
var renderer *sdl.Renderer
var running bool
var event sdl.Event
var inputState InputState
url := "ws://" + serverStr
origin := "http://" + serverStr
ws, err := websocket.Dial(url, "", origin)
if err != nil {
fmt.Printf("%v\n", err)
os.Exit(1)
}
window, err = sdl.CreateWindow(winTitle, sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED,
winWidth, winHeight, sdl.WINDOW_SHOWN)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create window: %s\n", err)
return 1
}
defer window.Destroy()
renderer, err = sdl.CreateRenderer(window, -1, sdl.RENDERER_ACCELERATED)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create renderer: %s\n", err)
return 2
}
defer renderer.Destroy()
renderer.Clear()
websocket.Message.Send(ws, joinMessage(name))
running = true
var data map[string]map[string][]map[string]interface{}
decoder := msgpack.NewDecoder(ws)
renderer.SetDrawColor(1, 1, 1, 255)
renderer.Clear()
for running {
renderer.SetDrawColor(1, 1, 1, 255)
renderer.Clear()
newInputState := inputState
for event = sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
switch event.(type) {
case *sdl.QuitEvent:
running = false
case *sdl.KeyDownEvent:
switch event.(*sdl.KeyDownEvent).Keysym.Sym {
case sdl.K_ESCAPE:
running = false
case sdl.K_LEFT:
newInputState.Left = true
case sdl.K_RIGHT:
newInputState.Right = true
case sdl.K_UP:
newInputState.Thrust = true
}
case *sdl.KeyUpEvent:
switch event.(*sdl.KeyUpEvent).Keysym.Sym {
case sdl.K_LEFT:
newInputState.Left = false
case sdl.K_RIGHT:
newInputState.Right = false
case sdl.K_UP:
newInputState.Thrust = false
}
}
}
if !newInputState.IsSameAs(inputState) {
websocket.Message.Send(ws, newInputState.Message())
inputState = newInputState
}
decoder.Decode(&data)
for _, ship := range data["state"]["ships"] {
colourhex, _ := hex.DecodeString(ship["colour"].(string)[1:7])
rot, _ := ship["rotation"].(float64)
s := Ship{
Position: V2{float64(ship["x"].(int64)), float64(ship["y"].(int64))},
Size: 30,
Rotation: rot,
Doge: ship["doge"].(bool),
}
renderer.SetDrawColor(uint8(colourhex[0]), uint8(colourhex[1]), uint8(colourhex[2]), 255)
renderer.DrawLines(s.Points())
}
renderer.Present()
}
return 0
}
func (view *gameView) Render(renderer *sdl.Renderer, events *Events) {
view.player.calculateMovement(events)
// start each new frame by filling the frame black
renderer.SetDrawColor(0, 0, 0, 0)
renderer.Clear()
// draw the player
renderer.SetDrawColor(255, 0, 0, 255)
playerSDLRect := view.player.rect.GetSDLRect()
renderer.DrawRect(playerSDLRect)
renderer.FillRect(playerSDLRect)
// draw the players spinning weapon
playerWeaponSDLRect := view.player.weapon.rect.GetSDLRect()
renderer.DrawRect(playerWeaponSDLRect)
renderer.FillRect(playerWeaponSDLRect)
// destroyedMeteors is used to remove destroyed meteors outside
// of looping through view.meteors to avoid out of range errors
var destroyedMeteors []int
// loop through the frames active meteors
for i, meteor := range view.meteors {
// move and draw and then reinsert the moved meteor
meteor.move()
enemySDLRect := meteor.rect.GetSDLRect()
renderer.SetDrawColor(0, 255, 0, 255)
renderer.DrawRect(enemySDLRect)
renderer.FillRect(enemySDLRect)
view.meteors[i] = meteor
// if the player and meteor collide, end the game
if view.player.rect.Colision(meteor.rect) {
renderer.Present()
log.Println("You died!")
log.Println("Score:", view.score)
sdl.Delay(1000)
os.Exit(0)
}
// if the weapon and meteor collide, destroy it and update score
if meteor.rect.Colision(view.player.weapon.rect) {
destroyedMeteors = append(destroyedMeteors, i)
view.score += 10
}
// if the meteor is off screen, destroy it and update score
if meteor.isOffScreen() {
destroyedMeteors = append(destroyedMeteors, i)
view.score++
}
}
// for each destroyed meteor, remove it from the meteors slice
for _, i := range destroyedMeteors {
view.meteors = append(view.meteors[:i], view.meteors[i+1:]...)
}
// present the updated frame to the player
renderer.Present()
// add new meteors depending on the difficulty and ticks since
// last meteor was added
if view.meteorTimer > 100 {
newMeteor := spawnMeteor()
view.meteors = append(view.meteors, newMeteor)
view.meteorTimer = rand.Intn(30) + view.difficulty
if view.difficulty < 60 {
view.difficulty += 3
}
}
view.meteorTimer++
return
}
func run() int {
var window *sdl.Window
var renderer *sdl.Renderer
var points []sdl.Point
var rect sdl.Rect
var rects []sdl.Rect
var err error
sdl.Do(func() {
window, err = sdl.CreateWindow(WindowTitle, sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, WindowWidth, WindowHeight, sdl.WINDOW_SHOWN)
})
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create window: %s\n", err)
return 1
}
defer func() {
sdl.Do(func() {
window.Destroy()
})
}()
sdl.Do(func() {
renderer, err = sdl.CreateRenderer(window, -1, sdl.RENDERER_ACCELERATED)
})
if err != nil {
fmt.Fprint(os.Stderr, "Failed to create renderer: %s\n", err)
return 2
}
sdl.Do(func() {
renderer.Clear()
})
defer func() {
sdl.Do(func() {
renderer.Destroy()
})
}()
go func() {
println("goroutine: A")
}()
sdl.Do(func() {
renderer.SetDrawColor(255, 255, 255, 255)
renderer.DrawPoint(150, 300)
println("queue: A")
})
go func() {
println("goroutine: B")
}()
sdl.Do(func() {
renderer.SetDrawColor(0, 0, 255, 255)
renderer.DrawLine(0, 0, 200, 200)
println("queue: B")
})
go func() {
println("goroutine: C")
}()
sdl.Do(func() {
points = []sdl.Point{{0, 0}, {100, 300}, {100, 300}, {200, 0}}
renderer.SetDrawColor(255, 255, 0, 255)
renderer.DrawLines(points)
println("queue: C")
})
go func() {
println("goroutine: D")
}()
sdl.Do(func() {
rect = sdl.Rect{300, 0, 200, 200}
renderer.SetDrawColor(255, 0, 0, 255)
renderer.DrawRect(&rect)
println("queue: D")
})
go func() {
println("goroutine: E")
}()
sdl.Do(func() {
rects = []sdl.Rect{{400, 400, 100, 100}, {550, 350, 200, 200}}
renderer.SetDrawColor(0, 255, 255, 255)
renderer.DrawRects(rects)
println("queue: E")
})
go func() {
println("goroutine: F")
}()
sdl.Do(func() {
rect = sdl.Rect{250, 250, 200, 200}
renderer.SetDrawColor(0, 255, 0, 255)
renderer.FillRect(&rect)
println("queue: F")
})
go func() {
println("goroutine: G")
}()
sdl.Do(func() {
rects = []sdl.Rect{{500, 300, 100, 100}, {200, 300, 200, 200}}
renderer.SetDrawColor(255, 0, 255, 255)
renderer.FillRects(rects)
println("queue: G")
})
go func() {
println("goroutine: H")
}()
sdl.Do(func() {
renderer.Present()
println("queue: H")
})
sdl.Do(func() {
sdl.Delay(2000)
})
return 0
}
func run() int {
var window *sdl.Window
var renderer *sdl.Renderer
var err error
sdl.Do(func() {
window, err = sdl.CreateWindow(WindowTitle, sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, WindowWidth, WindowHeight, sdl.WINDOW_OPENGL)
})
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create window: %s\n", err)
return 1
}
defer func() {
sdl.Do(func() {
window.Destroy()
})
}()
sdl.Do(func() {
renderer, err = sdl.CreateRenderer(window, -1, sdl.RENDERER_ACCELERATED)
})
if err != nil {
fmt.Fprint(os.Stderr, "Failed to create renderer: %s\n", err)
return 2
}
defer func() {
sdl.Do(func() {
renderer.Destroy()
})
}()
sdl.Do(func() {
renderer.Clear()
})
for i := range rects {
rects[i] = sdl.Rect{
X: int32(rand.Int() % WindowWidth),
Y: int32(i * WindowHeight / len(rects)),
W: RectWidth,
H: RectHeight,
}
}
running := true
for running {
sdl.Do(func() {
for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
switch event.(type) {
case *sdl.QuitEvent:
runningMutex.Lock()
running = false
runningMutex.Unlock()
}
}
renderer.Clear()
renderer.SetDrawColor(0, 0, 0, 0x20)
renderer.FillRect(&sdl.Rect{0, 0, WindowWidth, WindowHeight})
})
// Do expensive stuff using goroutines
wg := sync.WaitGroup{}
for i := range rects {
wg.Add(1)
go func(i int) {
rects[i].X = (rects[i].X + 10) % WindowWidth
sdl.Do(func() {
renderer.SetDrawColor(0xff, 0xff, 0xff, 0xff)
renderer.DrawRect(&rects[i])
})
wg.Done()
}(i)
}
wg.Wait()
sdl.Do(func() {
renderer.Present()
sdl.Delay(1000 / FrameRate)
})
}
return 0
}