Golang gl21.Clear函数代码示例

func GameLoop() {

	t := 0.0
	dt := 0.1

	CreateUniverse()

	camera.PositionCamera(0, 0, 1000, 900)

	for glfw.WindowParam(glfw.Opened) == 1 {

		t += dt

		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
		gl.Clear(gl.DEPTH_BUFFER_BIT | gl.LIGHTING_BIT)

		for i := range universe.Systems {
			for j := range universe.Systems[i].Planets {
				BufferPlanet(universe.Systems[i].Planets[j])
				ai.PlanetOrbit(universe.Systems[i].Planets[j], t)
			}
			for j := range universe.Systems[i].Stars {
				BufferStar(universe.Systems[i].Stars[j])
				ai.StarStationary(universe.Systems[i].Stars[j], t)
			}
		}

		glfw.SwapBuffers()
	}
}

func (a *app) draw(t time.Time) {
	gl.Clear(gl.COLOR_BUFFER_BIT)
	img := a.img
	w := img.Rect.Dx()
	h := img.Rect.Dy()
	gl.ActiveTexture(gl.TEXTURE0)
	upload(1, img.Y, img.YStride, w, h)
	gl.ActiveTexture(gl.TEXTURE1)
	upload(2, img.Cb, img.CStride, w/2, h/2)
	gl.ActiveTexture(gl.TEXTURE2)
	upload(3, img.Cr, img.CStride, w/2, h/2)
	if *blend {
		pimg := a.pimg
		gl.Uniform1f(a.factorloc, factor(t,
			a.tbase.Add(pimg.Timecode),
			a.tbase.Add(img.Timecode)))
		gl.ActiveTexture(gl.TEXTURE3)
		upload(4, pimg.Y, pimg.YStride, w, h)
		gl.ActiveTexture(gl.TEXTURE4)
		upload(5, pimg.Cb, pimg.CStride, w/2, h/2)
		gl.ActiveTexture(gl.TEXTURE5)
		upload(6, pimg.Cr, pimg.CStride, w/2, h/2)
	}
	gl.DrawArrays(gl.TRIANGLE_STRIP, 0, 4)
}

func (w *glfwBackend) Render(console *Console) {
	if w.Running() {
		w.mouse.Left.Released = false
		w.mouse.Right.Released = false
		w.mouse.Middle.Released = false
		w.key = NOKEY

		gl.Clear(gl.COLOR_BUFFER_BIT)

		gl.BindTexture(gl.TEXTURE_2D, textures[1])
		for y := 0; y < console.Height(); y++ {
			for x := 0; x < console.Width(); x++ {
				_, bg, _ := console.Get(x, y)
				w.letter(x, y, 0, bg)
			}
		}

		gl.BindTexture(gl.TEXTURE_2D, textures[0])
		for y := 0; y < console.Height(); y++ {
			for x := 0; x < console.Width(); x++ {
				fg, _, ch := console.Get(x, y)
				if position, ok := w.font.Map(ch); ok {
					w.letter(x, y, position, fg)
				}
			}
		}

		glfw.SwapBuffers()
	}
}

func drawScene(draw func()) {
	// gl.ClearColor(1.0, 1.0, 1.0, 1.0)
	gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

	draw()
	gl.Finish()
}

func (w *Window) run(init func(w *Window)) {
	runtime.LockOSThread()
	glfw.MakeContextCurrent(w.w)
	defer glfw.MakeContextCurrent(nil)

	init(w)

	// glfw should fire initial resize events to avoid this duplication (https://github.com/glfw/glfw/issues/62)
	w.resized(w.w.Size())
	w.framebufferResized(w.w.FramebufferSize())

	gl.Enable(gl.SCISSOR_TEST)
	gl.Enable(gl.BLEND)
	gl.Enable(gl.POINT_SMOOTH)
	gl.Enable(gl.LINE_SMOOTH)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)

	for !w.close {
		select {
		case f := <-w.do:
			f()
		case <-w.paint:
			gl.MatrixMode(gl.MODELVIEW)
			gl.LoadIdentity()

			gl.Scissor(0, 0, w.bufWidth, w.bufHeight)
			gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
			w.base().paint()
			w.w.SwapBuffers()
		}
	}
}

func (w *Window) run() {
	runtime.LockOSThread()
	glfw.MakeContextCurrent(w.w)
	defer glfw.MakeContextCurrent(nil)

	// glfw should fire initial resize events to avoid this duplication (https://github.com/glfw/glfw/issues/62)
	width, height := w.w.Size()
	gl.MatrixMode(gl.PROJECTION)
	gl.LoadIdentity()
	gl.Ortho(0, gl.Double(width), 0, gl.Double(height), -1, 1)
	Resize(w, Pt(float64(width), float64(height)))
	width, height = w.w.FramebufferSize()
	gl.Viewport(0, 0, gl.Sizei(width), gl.Sizei(height))

	gl.Enable(gl.BLEND)
	gl.Enable(gl.POINT_SMOOTH)
	gl.Enable(gl.LINE_SMOOTH)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)

	for !w.close {
		select {
		case f := <-w.do:
			f()
		case <-w.paint:
			gl.MatrixMode(gl.MODELVIEW)
			gl.LoadIdentity()

			gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
			w.base().paint()
			w.w.SwapBuffers()
		}
	}
}

func drawScene() {
	gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

	gl.MatrixMode(gl.MODELVIEW)
	gl.LoadIdentity()
	gl.Rotated(-90, 1, 0, 0)
	//gl.Rotated(90, 0, 0, 1)
	gl.Rotated(gl.Double(-viewAngles[2]), 1, 0, 0)
	gl.Rotated(gl.Double(-viewAngles[0]), 0, 1, 0)
	gl.Rotated(gl.Double(-viewAngles[1]), 0, 0, 1)
	gl.Translated(gl.Double(viewOrg[0]), gl.Double(viewOrg[1]), gl.Double(viewOrg[2]))

	var r, g, b gl.Ubyte

	for i, face := range model.Faces {
		r = gl.Ubyte(i) + 100
		g = gl.Ubyte(i>>1) + 100
		b = gl.Ubyte(i>>2) + 100

		if model.Triangle {
			gl.Begin(gl.TRIANGLES)
		} else {
			gl.Begin(gl.LINES)
		}

		gl.Color4ub(r, g, b, 0xff)
		for _, v := range face.Verts {
			gl.Vertex3d(gl.Double(v.Pos[0]), gl.Double(v.Pos[1]), gl.Double(v.Pos[2]))
		}

		gl.End()
	}
}

func (l *Level) Render() {
	gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
	SetUpCamera(800, 600, l.LevelBlueprint, 0)
	l.levelVertexBuffer.Render(Point3{0, 0, 0})
	l.Paddle.Render()
	l.Ball.Render()
}

func getPlayers(console *base.Console) []gin.DeviceId {
	var ct controllerTracker
	gin.In().RegisterEventListener(&ct)
	defer gin.In().UnregisterEventListener(&ct)
	ticker := time.Tick(time.Millisecond * 17)
	start := time.Time{}
	readyDuration := time.Second * 2
	for start.IsZero() || time.Now().Sub(start) < readyDuration {
		<-ticker
		sys.Think()
		if ct.Ready() && start.IsZero() {
			start = time.Now()
		}
		if !ct.Ready() {
			start = time.Time{}
		}
		render.Queue(func() {
			defer console.Draw(0, 0, wdx, wdy)
			gl.Clear(gl.COLOR_BUFFER_BIT)
			gl.Disable(gl.DEPTH_TEST)
			gui.SetFontColor(1, 1, 1, 1)
			gl.Disable(gl.TEXTURE_2D)
			gl.MatrixMode(gl.PROJECTION)
			gl.LoadIdentity()
			gl.Ortho(gl.Double(0), gl.Double(wdx), gl.Double(wdy), gl.Double(0), 1000, -1000)
			gl.ClearColor(0, 0, 0, 1)
			gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
			gl.MatrixMode(gl.MODELVIEW)
			gl.LoadIdentity()
			base.GetDictionary("crackin").RenderString(fmt.Sprintf("Num players: %d", len(ct.ids)), float64(wdx)/2, 300, 0, 100, gui.Center)
			base.GetDictionary("crackin").RenderString(fmt.Sprintf("Num ready: %d", ct.NumReady()), float64(wdx)/2, 400, 0, 100, gui.Center)
			if !start.IsZero() {
				base.GetDictionary("crackin").RenderString(fmt.Sprintf("Starting in %2.2f", (readyDuration-time.Now().Sub(start)).Seconds()), float64(wdx)/2, 500, 0, 100, gui.Center)
			}
		})
		render.Queue(func() {
			sys.SwapBuffers()
		})
		render.Purge()
	}
	var devices []gin.DeviceId
	for id := range ct.ids {
		devices = append(devices, id)
	}
	return devices
}

func mainLoop(client sgf.ClientEngine, controllers []gin.DeviceId, console *base.Console) {
	client.MakeRequest(game.Join{Rebels: make([]*game.RebelPlayer, 2)})
	ticker := time.Tick(time.Millisecond * 17)
	render.Queue(func() {
		gl.Enable(gl.BLEND)
		gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
	})
	for {
		<-ticker
		if gin.In().GetKey(gin.AnyEscape).FramePressCount() != 0 {
			return
		}
		sys.Think()
		render.Queue(func() {
			gl.Clear(gl.COLOR_BUFFER_BIT)
			gl.Disable(gl.DEPTH_TEST)
			gui.SetFontColor(1, 1, 1, 1)
			gl.Disable(gl.TEXTURE_2D)
			gl.MatrixMode(gl.PROJECTION)
			gl.LoadIdentity()
			gl.Ortho(gl.Double(0), gl.Double(wdx), gl.Double(wdy), gl.Double(0), 1000, -1000)
			gl.ClearColor(0, 0, 0, 1)
			gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
			gl.MatrixMode(gl.MODELVIEW)
			gl.LoadIdentity()
			base.GetDictionary("crackin").RenderString("Waiting on some nubs", float64(wdx)/2, 300, 0, 100, gui.Center)
		})

		client.RLock()
		g := client.Game().(*game.Game)
		mode := g.Mode
		client.RUnlock()
		if mode == game.ModeWaiting {
		} else if mode == game.ModeProgram {
			programLoop(client, controllers, console)
		} else if mode == game.ModeRun {

		}

		render.Queue(func() {
			sys.SwapBuffers()
		})
		render.Purge()
	}
}

func (g *Gui) Draw() {
	gl.MatrixMode(gl.PROJECTION)
	gl.LoadIdentity()
	gl.Ortho(gl.Double(g.region.X), gl.Double(g.region.X+g.region.Dx), gl.Double(g.region.Y+g.region.Dy), gl.Double(g.region.Y), 1000, -1000)
	gl.ClearColor(0, 0, 0, 1)
	gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
	gl.MatrixMode(gl.MODELVIEW)
	gl.LoadIdentity()
	g.root.Draw(g.region, &styleStack{})
}

func ClearScene() {
	ambient := []gl.Float{0.7, 0.7, 0.7, 1}
	diffuse := []gl.Float{0.9, 0.9, 0.9, 1}
	lightpos := []gl.Float{0.2, 0.5, 1, 1}
	gl.Lightfv(gl.LIGHT0, gl.AMBIENT, &ambient[0])
	gl.Lightfv(gl.LIGHT0, gl.DIFFUSE, &diffuse[0])
	gl.Lightfv(gl.LIGHT0, gl.POSITION, &lightpos[0])
	gl.Enable(gl.LIGHT0)
	gl.ClearColor(1, 1, 1, 1)
	gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
}

func (g *Gui) Draw() {
	gl.MatrixMode(gl.PROJECTION)
	gl.LoadIdentity()
	region := g.root.Render_region
	gl.Ortho(gl.Double(region.X), gl.Double(region.X+region.Dx), gl.Double(region.Y), gl.Double(region.Y+region.Dy), 1000, -1000)
	gl.ClearColor(0, 0, 0, 1)
	gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
	gl.MatrixMode(gl.MODELVIEW)
	gl.LoadIdentity()
	g.root.Draw(region)
	if g.FocusWidget() != nil {
		g.FocusWidget().DrawFocused(region)
	}
}

func drawScene() {
	fps()
	gl.Clear(gl.COLOR_BUFFER_BIT)

	gl.MatrixMode(gl.PROJECTION)
	gl.LoadIdentity()
	if input.Zoom > 0 {
		gl.Ortho(0, gl.Double(float64(*flagSize)/input.Zoom), gl.Double(float64(*flagSize)/input.Zoom), 0, -1, 1.0)
	}

	gl.MatrixMode(gl.MODELVIEW)
	gl.LoadIdentity()
	gl.Translatef(gl.Float(input.TransX*1), gl.Float(input.TransY*1), 0)
	drawGrid()
	drawCells()
}

func (o *OpenGl) Init() {
	if err := glfw.Init(); err != nil {
		fmt.Fprintf(os.Stderr, "glfw: %s\n", err)
		return
	}
	defer glfw.Terminate()

	if err := glfw.OpenWindow(o.width, o.height, 0, 0, 0, 0, 16, 0, glfw.Windowed); err != nil {
		fmt.Fprintf(os.Stderr, "glfw: %s\n", err)
		return
	}
	defer glfw.CloseWindow()

	glfw.SetSwapInterval(1)
	glfw.SetWindowTitle(o.title)

	if err := gl.Init(); err != nil {
		fmt.Fprintf(os.Stderr, "gl: %s\n", err)
	}

	glfw.SetKeyCallback(glfw.KeyHandler(o.keyboard))
	glfw.SetMouseButtonCallback(glfw.MouseButtonHandler(o.mouseClick))
	glfw.SetMousePosCallback(glfw.MousePosHandler(o.mouseMove))
	glfw.SetMouseWheelCallback(glfw.MouseWheelHandler(o.mouseWheel))

	if err := o.initScene(); err != nil {
		fmt.Fprintf(os.Stderr, "init: %s\n", err)
		return
	}

	for glfw.WindowParam(glfw.Opened) == 1 {
		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

		if o.display3d != nil {
			o.set3dView()
			o.display3d()
		}
		if o.display2d != nil {
			o.set2dView()
			o.display2d()
		}

		glfw.SwapBuffers()
		time.Sleep(20 * time.Millisecond)
		//<-o.redisplay
	}
}