Пример #1
0
// RenderLinesWithEvents renders multiple channels of samples to screen, and draws events.
func (s *Screen) RenderLinesWithEvents(lines []Line, events <-chan interface{}, sampleRate int) {
	s.lines = lines

	runtime.LockOSThread()

	// NOTE: It appears that glfw 3.1 uses its own internal error callback.
	// glfw.SetErrorCallback(func(err glfw.ErrorCode, desc string) {
	// log.Fatalf("%v: %s\n", err, desc)
	// })
	if err := glfw.Init(); err != nil {
		log.Fatalf("Can't init glfw: %v!", err)
	}
	defer glfw.Terminate()

	window, err := glfw.CreateWindow(s.width, s.height, "Muse", nil, nil)
	if err != nil {
		log.Fatalf("CreateWindow failed: %s", err)
	}
	if aw, ah := window.GetSize(); aw != s.width || ah != s.height {
		log.Fatalf("Window doesn't have the requested size: want %d,%d got %d,%d", s.width, s.height, aw, ah)
	}
	window.MakeContextCurrent()

	// Must gl.Init() *after* MakeContextCurrent
	if err := gl.Init(); err != nil {
		log.Fatalf("Can't init gl: %v!", err)
	}

	// Set window up to be [0, -1.0] -> [width, 1.0], black.
	gl.MatrixMode(gl.MODELVIEW)
	gl.LoadIdentity()
	gl.Translated(-1, 0, 0)
	gl.Scaled(2/float64(s.width), 1.0, 1.0)
	gl.ClearColor(0.0, 0.0, 0.0, 0.0)

	// Actually start writing data to the buffer
	for i, _ := range s.lines {
		s.lines[i].valueBuffer = types.NewBuffer(int(float64(s.width) / s.pixelsPerSample))
		s.lines[i].valueBuffer.GoPushChannel(s.lines[i].Values, sampleRate)
	}
	if events != nil {
		s.eventBuffer.GoPushChannel(events, sampleRate)
	}

	// Keep drawing while we still can (and should).
	for !window.ShouldClose() && !s.bufferFinished() {
		if window.GetKey(glfw.KeyEscape) == glfw.Press {
			break
		}
		gl.Clear(gl.COLOR_BUFFER_BIT)
		s.drawSignal()
		window.SwapBuffers()
		glfw.PollEvents()
	}

	// Keep window around, only close on esc.
	for !window.ShouldClose() && window.GetKey(glfw.KeyEscape) != glfw.Press {
		glfw.PollEvents()
	}
}
Пример #2
0
func main() {
	err := glfw.Init()
	if err != nil {
		panic(err)
	}
	defer glfw.Terminate()
	width, height = 800, 800
	window, err := glfw.CreateWindow(width, height, "Show RoundedRect", nil, nil)
	if err != nil {
		panic(err)
	}

	window.MakeContextCurrent()
	window.SetSizeCallback(reshape)
	window.SetKeyCallback(onKey)
	window.SetCharCallback(onChar)

	glfw.SwapInterval(1)

	err = gl.Init()
	if err != nil {
		panic(err)
	}

	reshape(window, width, height)
	for !window.ShouldClose() {
		if redraw {
			display()
			window.SwapBuffers()
			redraw = false
		}
		glfw.PollEvents()
		//		time.Sleep(2 * time.Second)
	}
}
Пример #3
0
// StartFrame sets everything up to start rendering a new frame.
// This includes swapping in last rendered buffer, polling for window events,
// checkpointing cursor tracking, and updating the time since last frame.
func (w *Window) StartFrame() {
	// swap in the previous rendered buffer
	w.glfw.SwapBuffers()

	// poll for UI window events
	glfw.PollEvents()

	if w.inputManager.IsActive(PROGRAM_QUIT) {
		w.glfw.SetShouldClose(true)
	}

	// base calculations of time since last frame (basic program loop idea)
	// For better advanced impl, read: http://gafferongames.com/game-physics/fix-your-timestep/
	curFrameTime := glfw.GetTime()

	if w.firstFrame {
		w.lastFrameTime = curFrameTime
		w.firstFrame = false
	}

	w.dTime = curFrameTime - w.lastFrameTime
	w.lastFrameTime = curFrameTime

	w.inputManager.CheckpointCursorChange()
}
Пример #4
0
// Update must be called from within the main thread as often as possible.
func (window *OpenGlWindow) Update() {
	glfw.PollEvents()

	window.glfwWindow.MakeContextCurrent()
	window.CallRender()
	window.glfwWindow.SwapBuffers()
}
Пример #5
0
//
// Start Loop
// this starts the event loop which runs until the program ends
//
func (glw *Glw) StartLoop() {
	optimalTime := 1000.0 / float64(glw.fps)
	previousTime := glfw.GetTime()

	// If the Window is open keep looping
	for !glw.GetWindow().ShouldClose() {
		// Update
		time := glfw.GetTime()
		elapsed := time - previousTime
		delta := elapsed / optimalTime
		previousTime = time

		// Calls the Render Callback
		glw.renderer(glw, delta)

		// Triggers window refresh
		glw.GetWindow().SwapBuffers()

		// Triggers events
		glfw.PollEvents()
	}

	// Called at the end of the program, and terminates the window system
	glw.Terminate()
}
Пример #6
0
func main() {
	err := glfw.Init()
	if err != nil {
		panic(err)
	}
	defer glfw.Terminate()

	window, err := glfw.CreateWindow(640, 480, "Testing", nil, nil)
	if err != nil {
		panic(err)
	}

	window.MakeContextCurrent()

	if err := gl.Init(); err != nil {
		panic(err)
	}

	// int width, height
	// glfw.GetFramebufferSize(window, &width, &height)

	for !window.ShouldClose() {
		// Do OpenGL stuff.
		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
		gl.Color3f(1, 1, 0)
		gl.Rectf(-0.75, 0.75, 0.75, -0.75)
		gl.Color3f(1, 0, 1)
		gl.Rectf(-0.5, 0.5, 0.5, -0.5)
		window.SwapBuffers()
		glfw.PollEvents()
	}
}
Пример #7
0
func (self *Application) run() error {
	if err := glfw.Init(); err != nil {
		return err
	}
	defer glfw.Terminate()

	glfw.WindowHint(glfw.Resizable, glfw.False)
	glfw.WindowHint(glfw.ContextVersionMajor, 4)
	glfw.WindowHint(glfw.ContextVersionMinor, 1)
	glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
	glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)

	window, err := glfw.CreateWindow(512, 512, "GL", nil, nil)
	if err != nil {
		return err
	}

	window.MakeContextCurrent()

	if err := gl.Init(); err != nil {
		return err
	}

	if err := self.setup(); err != nil {
		return err
	}

	for !window.ShouldClose() {
		self.display()
		window.SwapBuffers()
		glfw.PollEvents()
	}

	return nil
}
Пример #8
0
// RenderLoop is the main render loop for the application
func (app *ExampleApp) RenderLoop() {
	lastRenderTime = time.Now()

	for !app.MainWindow.ShouldClose() {
		// get the time delta
		loopTime := time.Now()
		deltaNano := loopTime.Sub(lastRenderTime).Nanoseconds()
		deltaF := float64(deltaNano) * (1.0 / float64(time.Second))

		// call the Update callback
		if app.OnUpdate != nil {
			app.OnUpdate(deltaF)
		}

		// call the Render callback
		if app.OnRender != nil {
			app.OnRender(deltaF)
		}

		// draw the screen and get any input
		app.MainWindow.SwapBuffers()
		glfw.PollEvents()

		// update the last render time
		lastRenderTime = loopTime
	}
}
Пример #9
0
func (u *userInterface) setScreenSize(width, height, scale int) bool {
	if u.width == width && u.height == height && u.scale == scale {
		return false
	}

	ch := make(chan struct{})
	window := u.window
	window.SetFramebufferSizeCallback(func(w *glfw.Window, width, height int) {
		window.SetFramebufferSizeCallback(nil)
		close(ch)
	})
	window.SetSize(width*scale, height*scale)

	for {
		done := false
		glfw.PollEvents()
		select {
		case <-ch:
			done = true
		default:
		}
		if done {
			break
		}
	}
	u.width = width
	u.height = height
	u.scale = scale

	// For retina displays, recalculate the scale with the framebuffer size.
	windowWidth, _ := window.GetFramebufferSize()
	u.actualScale = windowWidth / width
	return true
}
Пример #10
0
func main() {

	if err := glfw.Init(); err != nil {
		log.Fatalln("failed to initialize glfw:", err)
	}
	defer glfw.Terminate()

	glfw.WindowHint(glfw.Resizable, glfw.False)
	glfw.WindowHint(glfw.ContextVersionMajor, 2)
	glfw.WindowHint(glfw.ContextVersionMinor, 1)
	window, err := glfw.CreateWindow(800, 600, "Create Window Example", nil, nil)
	if err != nil {
		panic(err)
	}
	window.MakeContextCurrent()

	if err := gl.Init(); err != nil {
		panic(err)
	}

	window.SetKeyCallback(keypress)
	window.SetMouseButtonCallback(mousepress)

	gl.Viewport(0, 0, 800, 600)

	for !window.ShouldClose() {
		draw()
		window.SwapBuffers()
		glfw.PollEvents()
	}

}
Пример #11
0
func main() {

	width := 1024
	height := 768
	title := "Simple Triangle"

	if err := glfw.Init(); err != nil {
		log.Fatalln("failed to initialize glfw:", err)
	}
	defer glfw.Terminate()

	glfw.WindowHint(glfw.Samples, 4)             // 4x antialiasing
	glfw.WindowHint(glfw.ContextVersionMajor, 3) // We want OpenGL 3.3
	glfw.WindowHint(glfw.ContextVersionMinor, 3)
	glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)    // To make MacOS happy; should not be needed
	glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile) //We don't want the old OpenGL
	window, err := glfw.CreateWindow(width, height, title, nil, nil)
	if err != nil {
		panic(err)
	}
	window.MakeContextCurrent()

	if err := gl.Init(); err != nil {
		panic(err)
	}
	window.SetKeyCallback(keypress)
	window.SetMouseButtonCallback(mousepress)
	gl.Viewport(0, 0, 1024, 768)
	for !window.ShouldClose() {
		draw()
		window.SwapBuffers()
		glfw.PollEvents()
	}
}
Пример #12
0
func main() {
	err := glfw.Init()
	if err != nil {
		panic(err)
	}
	defer glfw.Terminate()

	window, err := glfw.CreateWindow(640, 480, "Testing", nil, nil)
	if err != nil {
		panic(err)
	}

	window.MakeContextCurrent()

	if err := gl.Init(); err != nil {
		panic(err)
	}

	window.SetKeyCallback(game.OnKey)
	game.Init()
	for !window.ShouldClose() {
		game.Render()

		window.SwapBuffers()
		glfw.PollEvents()
	}
}
Пример #13
0
// Runs the visualization with a set of DelayedNoteData. The DelayedNote data is
// used to push information to the synth as well as represent the data visually.
func RunVisualization(notes *synth.NoteArrangement, oNoteChannel chan synth.DelayedNoteData) error {
	window, assets, err := initialize()
	if err != nil {
		return err
	}
	defer destroy(window, assets)

	// The main update loop.
	ct, lt, dt := 0.0, 0.0, 0.0
	for !window.ShouldClose() {
		// Keeping the current time.
		lt = ct
		ct = glfw.GetTime()
		dt = ct - lt

		// Real render loop.
		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

		if config.DebugMode {
			glErr := gl.GetError()
			if glErr != gl.NO_ERROR {
				fmt.Printf("OpenGL error: %d\n", glErr)
			}
		}

		window.SwapBuffers()
		glfw.PollEvents()

		if dt < 1/1000.0 {
			// Delay the thread to keep up w/ updating?
		}
	}

	return nil
}
Пример #14
0
func main() {
	if err := glfw.Init(); err != nil {
		log.Fatalln("failed to initialize glfw:", err)
	}
	defer glfw.Terminate()

	glfw.WindowHint(glfw.Resizable, glfw.False)
	glfw.WindowHint(glfw.ContextVersionMajor, 2)
	glfw.WindowHint(glfw.ContextVersionMinor, 1)
	window, err := glfw.CreateWindow(640, 480, "tut03", nil, nil)
	if err != nil {
		panic(err)
	}
	window.MakeContextCurrent()

	if err := gl.Init(); err != nil {
		panic(err)
	}

	t0 := time.Now()
	program := initResources()
	for {
		curFade = float32(math.Sin(time.Now().Sub(t0).Seconds()*2*math.Pi/5)/2 + 0.5)
		onDisplay(program)
		window.SwapBuffers()
		glfw.PollEvents()
	}

	gl.DeleteProgram(program)
	gl.DeleteBuffers(1, &vboTriangle)
}
Пример #15
0
func main() {
	if err := glfw.Init(); err != nil {
		log.Fatalln("failed to initialize glfw:", err)
	}
	defer glfw.Terminate()

	glfw.WindowHint(glfw.Resizable, glfw.False)
	glfw.WindowHint(glfw.ContextVersionMajor, 2)
	glfw.WindowHint(glfw.ContextVersionMinor, 1)
	window, err := glfw.CreateWindow(800, 600, "Cube", nil, nil)
	if err != nil {
		panic(err)
	}
	window.MakeContextCurrent()

	if err := gl.Init(); err != nil {
		panic(err)
	}

	texture = newTexture("square.png")
	defer gl.DeleteTextures(1, &texture)

	setupScene()
	for !window.ShouldClose() {
		drawScene()
		window.SwapBuffers()
		glfw.PollEvents()
	}
}
func programLoop(window *glfw.Window) {

	// the linked shader program determines how the data will be rendered
	shaders := compileShaders()
	shaderProgram := linkShaders(shaders)

	// VAO contains all the information about the data to be rendered
	VAO := createTriangleVAO()

	for !window.ShouldClose() {
		// poll events and call their registered callbacks
		glfw.PollEvents()

		// perform rendering
		gl.ClearColor(0.2, 0.5, 0.5, 1.0)
		gl.Clear(gl.COLOR_BUFFER_BIT)

		// draw loop
		gl.UseProgram(shaderProgram)      // ensure the right shader program is being used
		gl.BindVertexArray(VAO)           // bind data
		gl.DrawArrays(gl.TRIANGLES, 0, 3) // perform draw call
		gl.BindVertexArray(0)             // unbind data (so we don't mistakenly use/modify it)
		// end of draw loop

		// swap in the rendered buffer
		window.SwapBuffers()
	}
}
Пример #17
0
func Run(g *Game) error {
	if g.Scene == nil {
		return fmt.Errorf("Scene property of given Game struct is empty")
	}

	// GLFW event handling must run on the main OS thread
	runtime.LockOSThread()
	if err := glfw.Init(); err != nil {
		return fmt.Errorf("glfw.Init failed: %s", err)
	}
	defer glfw.Terminate()

	glfw.WindowHint(glfw.ContextVersionMajor, OpenGLVerMinor)
	glfw.WindowHint(glfw.ContextVersionMinor, OpenGLVerMinor)

	glfw.WindowHint(glfw.Resizable, glfw.False)
	if g.Resizable {
		glfw.WindowHint(glfw.Resizable, glfw.True)
	}

	glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
	glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)

	window, err := glfw.CreateWindow(int(g.Width), int(g.Height), g.Title, nil, nil)
	if err != nil {
		return fmt.Errorf("glfw.CreateWindow failed: %s", err)
	}
	window.MakeContextCurrent()

	// Initialize Glow
	if err := gl.Init(); err != nil {
		return fmt.Errorf("gl.Init failed:", err)
	}

	version := gl.GoStr(gl.GetString(gl.VERSION))
	log.Println("gl.Init successful, OpenGL version:", version)

	var previousTime, deltaTime, time float32
	previousTime = float32(glfw.GetTime()) - 1.0/60.0

	g.Scene.Setup()

	for !window.ShouldClose() {
		time = float32(glfw.GetTime())
		deltaTime = time - previousTime

		glfw.PollEvents()

		gl.ClearColor(0.2, 0.3, 0.3, 0.5)
		gl.Clear(gl.COLOR_BUFFER_BIT)

		g.Scene.Update(deltaTime)
		g.Scene.Draw(deltaTime)
		previousTime = time

		window.SwapBuffers()
	}

	return nil
}
Пример #18
0
func main() {
	err := glfw.Init()
	if err != nil {
		panic(err)
	}
	defer glfw.Terminate()

	w, err := glfw.CreateWindow(640, 480, "Testing", nil, nil)
	if err != nil {
		panic(err)
	}

	w.MakeContextCurrent()
	glfw.SwapInterval(1)

	w.SetCharCallback(charCallBack)

	if err := gl.Init(); err != nil {
		panic(err)
	}

	setupScene(w)
	fmt.Println("Press 'q' to quit")
	for !w.ShouldClose() {
		// Do OpenGL stuff.
		time.Sleep(10 * time.Millisecond)
		drawScene(w)

		w.SwapBuffers()
		glfw.PollEvents()
	}
}
Пример #19
0
func main() {
	flag.Parse()

	go func() {
		http.ListenAndServe("localhost:6060", nil)
	}()

	if err := glfw.Init(); err != nil {
		log.Fatalln("failed to initialize glfw:", err)
	}
	defer glfw.Terminate()

	glfw.WindowHint(glfw.Resizable, glfw.True)
	glfw.WindowHint(glfw.Visible, glfw.False) // do not steal focus

	glfw.WindowHint(glfw.ContextVersionMajor, 2)
	glfw.WindowHint(glfw.ContextVersionMinor, 1)

	window, err := glfw.CreateWindow(800, 600, "Spector", nil, nil)
	if err != nil {
		panic(err)
	}
	window.MakeContextCurrent()
	window.Restore()
	window.SetPos(32, 64)

	if err := gl.Init(); err != nil {
		panic(err)
	}

	state := NewState()
	for !window.ShouldClose() {
		if window.GetKey(glfw.KeyEscape) == glfw.Press {
			return
		}
		if window.GetKey(glfw.KeyR) == glfw.Press {
			state.Stop()
			state = NewState()
		}

		start := time.Now()
		state.Update(1.0 / 60.0)
		updateTime := time.Since(start)

		start = time.Now()
		state.Render(window)
		renderTime := time.Since(start)

		text := fmt.Sprintf("update: %.2fms render: %.2fms",
			float32(updateTime)/float32(time.Millisecond),
			float32(renderTime)/float32(time.Millisecond))
		w, h := window.GetSize()
		state.Backend.SetFontColor(ui.ColorHex(0xFF0000FF))
		size := state.Backend.Measure(text)
		state.Backend.Text(text, ui.Block(float32(w)-size.X, float32(h)-size.Y, size.X, size.Y))

		window.SwapBuffers()
		glfw.PollEvents()
	}
}
Пример #20
0
func EventLoop() bool {
	glfw.PollEvents()
	if window.ShouldClose() {
		return false
	}
	return running
}
Пример #21
0
func main() {
	err := glfw.Init()
	if err != nil {
		panic(err)
	}
	defer glfw.Terminate()

	w, err := glfw.CreateWindow(640, 480, "Testing 3+", nil, nil)
	if err != nil {
		panic(err)
	}

	w.MakeContextCurrent()
	glfw.SwapInterval(1)

	w.SetCharCallback(charCallBack)

	if err := gl.Init(); err != nil {
		panic(err)
	}

	r := makeResources()

	gl.ClearColor(.5, .5, .5, 0)
	fmt.Println("Press 'q' to quit")
	for !w.ShouldClose() {
		time.Sleep(10 * time.Millisecond)

		render(w, r)

		w.SwapBuffers()
		glfw.PollEvents()
	}
}
Пример #22
0
func (a *Application) Continue() bool {
	glfw.PollEvents()
	if a.window.ShouldClose() {
		return false
	}
	a.update()
	return true
}
Пример #23
0
func (d *Director) Run() {
	for !d.window.ShouldClose() {
		d.Step()
		d.window.SwapBuffers()
		glfw.PollEvents()
	}
	d.SetView(nil)
}
Пример #24
0
func main() {
	err := glfw.Init()
	if err != nil {
		panic(err)
	}
	defer glfw.Terminate()
	fp, err := os.Open("example.tmx")
	if err != nil {
		panic(err)
	}

	m, err := tmx.NewMap(fp)
	if err != nil {
		panic(err)
	}

	var monitor *glfw.Monitor
	window, err := glfw.CreateWindow(screenWidth, screenHeight, "Map Renderer", monitor, nil)
	if err != nil {
		panic(err)
	}

	window.MakeContextCurrent()

	if err := gl.Init(); err != nil {
		panic(err)
	}

	width, height := window.GetFramebufferSize()
	gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
	gl.ClearColor(1.0, 1.0, 1.0, 1.0)
	gl.Viewport(0, 0, int32(width), int32(height))
	gl.MatrixMode(gl.PROJECTION)
	gl.LoadIdentity()
	gl.Ortho(0, float64(width), float64(height), 0, -1, 1)
	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
	canvas := newOpenGLCanvas(width, height, float32(width)/float32(screenWidth), float32(height)/float32(screenHeight))
	renderer := tmx.NewRenderer(*m, canvas)
	fps := 0
	startTime := time.Now().UnixNano()
	timer := tmx.CreateTimer()
	timer.Start()
	for !window.ShouldClose() {
		elapsed := float64(timer.GetElapsedTime()) / (1000 * 1000)
		renderer.Render(int64(math.Ceil(elapsed)))
		fps++
		if time.Now().UnixNano()-startTime > 1000*1000*1000 {
			log.Println(fps)
			startTime = time.Now().UnixNano()
			fps = 0
		}

		window.SwapBuffers()
		glfw.PollEvents()
		timer.UpdateTime()
	}
}
Пример #25
0
func Run(window *Window) {
	setupScene(window.width, window.height)
	for !window.handle.ShouldClose() {
		drawScene()
		window.Render()
		window.handle.SwapBuffers()
		glfw.PollEvents()
	}
}
Пример #26
0
func (me *Core) Play(g Game) {
	for !me.Win.ShouldClose() {
		gl.Clear(me.ClearOpt)
		g.Play()
		g.Display(me)
		glfw.PollEvents()
		me.Win.SwapBuffers()
		me.Exit()
	}
}
Пример #27
0
func main() {
	runtime.LockOSThread()
	if err := glfw.Init(); err != nil {
		log.Fatal(err)
	}
	defer glfw.Terminate()

	if err := gl.Init(); err != nil {
		log.Fatal(err)
	}

	window, err := glfw.CreateWindow(WindowWidth, WindowHeight, "Texture Demo", nil, nil)
	if err != nil {
		log.Fatal(err)
	}
	window.MakeContextCurrent()

	const vertShader = `#version 120

uniform mat4 proj;
attribute vec3 vertex_position;
attribute vec2 vertex_texture;
varying vec2 texture_coordinates;

void main() {
	gl_Position = proj * vec4(vertex_position, 1);
	texture_coordinates = vertex_texture;
}
`

	const fragShader = `#version 120

uniform sampler2D tex_loc;
varying vec2 texture_coordinates;

void main() {
	gl_FragColor = texture2D(tex_loc, texture_coordinates);
}
`

	texture, err := newImageTexture("sq.png")
	if err != nil {
		log.Fatal(err)
	}
	scene, err := NewScene(vertShader, fragShader, texture)
	if err != nil {
		log.Fatal(err)
	}

	for !window.ShouldClose() {
		scene.Draw()
		glfw.PollEvents()
		window.SwapBuffers()
	}
}
Пример #28
0
func main() {
	runtime.LockOSThread()

	if err := glfw.Init(); err != nil {
		panic(err)
	}
	defer glfw.Terminate()

	window, err := glfw.CreateWindow(800, 600, "fontstash example", nil, nil)
	if err != nil {
		panic(err)
	}

	window.MakeContextCurrent()
	glfw.SwapInterval(1)
	gl.Init()

	data, err := ioutil.ReadFile(filepath.Join("..", "ClearSans-Regular.ttf"))
	if err != nil {
		panic(err)
	}

	gl.Enable(gl.TEXTURE_2D)

	tmpBitmap := make([]byte, 512*512)
	cdata, err, _, tmpBitmap := truetype.BakeFontBitmap(data, 0, 32, tmpBitmap, 512, 512, 32, 96)
	var ftex uint32
	gl.GenTextures(1, &ftex)
	gl.BindTexture(gl.TEXTURE_2D, ftex)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
	gl.TexImage2D(gl.TEXTURE_2D, 0, gl.ALPHA, 512, 512, 0,
		gl.ALPHA, gl.UNSIGNED_BYTE, unsafe.Pointer(&tmpBitmap[0]))

	gl.ClearColor(0.3, 0.3, 0.32, 1.)

	for !window.ShouldClose() {
		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
		gl.MatrixMode(gl.PROJECTION)
		gl.LoadIdentity()
		gl.Ortho(0, 800, 600, 0, 0, 1)
		gl.MatrixMode(gl.MODELVIEW)
		gl.LoadIdentity()
		gl.Disable(gl.DEPTH_TEST)
		gl.Color4ub(255, 255, 255, 255)
		gl.Enable(gl.BLEND)
		gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)

		my_print(100, 100, "The quick brown fox jumps over the fence", ftex, cdata)

		window.SwapBuffers()
		glfw.PollEvents()
	}
}
Пример #29
0
func drawLoop(win *glfw.Window, vao uint32, shader uint32) {
	for !win.ShouldClose() {
		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
		gl.BindVertexArray(vao)
		gl.UseProgram(shader)
		gl.DrawArrays(gl.TRIANGLES, 0, 3)

		glfw.PollEvents()
		win.SwapBuffers()
	}
}
Пример #30
0
func Run() {
	if err := glfw.Init(); err != nil {
		glog.Fatalln("failed to initialize glfw", err)
	}
	defer glfw.Terminate()

	setupWindowOptions()
	window, err := glfw.CreateWindow(WindowWidth, WindowHeight, "Game", nil, nil)
	if err != nil {
		panic(err)
	}
	window.MakeContextCurrent()

	//initilize Glow
	if err := gl.Init(); err != nil {
		panic(err)
	}

	version := gl.GoStr(gl.GetString(gl.VERSION))
	fmt.Println("OpenGL version", version)

	shaderSource, err := ReadShaders("colorShader")
	if err != nil {
		panic(err)
	}
	program, err := NewProgram(shaderSource)
	if err != nil {
		panic(err)
	}
	program.Use()

	sprite := &SpriteComponent{-.5, -.5, 1, 1}
	sprite.ReloadGraphics()

	vertAttrib := uint32(gl.GetAttribLocation(program.program, CStr("vertPosition")))
	gl.EnableVertexAttribArray(vertAttrib)
	gl.VertexAttribPointer(vertAttrib, 3, gl.FLOAT, false, 0, gl.PtrOffset(0))

	gl.Enable(gl.DEPTH_TEST)
	gl.DepthFunc(gl.LESS)
	gl.ClearColor(1.0, 1.0, 1.0, 1.0)

	for !window.ShouldClose() {
		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

		program.Use()

		gl.BindVertexArray(sprite.vaoID)
		gl.DrawArrays(gl.TRIANGLES, 0, 2*3)

		window.SwapBuffers()
		glfw.PollEvents()
	}
}