Example #1
0
func OpenWindow(width, height int, caption string) *glfw.Window {
	// OpenGL haluaa että sitä käytetään aina samasta threadista
	// muuten tulee satunnaisia segfaultteja
	runtime.LockOSThread()

	glfw.Init()

	// luodaan ikkuna
	w, err := glfw.CreateWindow(width, height, caption, nil, nil)
	if err != nil {
		log.Fatal(err)
	}
	w.MakeContextCurrent()

	gl.Init()

	// Jotta painalluksista kerrottaisiin vaikka ne olisivat jo päättyneet
	w.SetInputMode(glfw.StickyKeys, glfw.True)
	w.SetInputMode(glfw.StickyMouseButtons, glfw.True)

	// läpinäkyvyys päälle (non-premultiplied alpha)
	gl.Enable(gl.BLEND)
	gl.BlendEquationSeparate(gl.FUNC_ADD, gl.FUNC_ADD)
	gl.BlendFuncSeparate(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA, gl.ONE, gl.ZERO)

	return w
}
Example #2
0
func initGL() (err error) {
	gl.Init()
	gl.ShadeModel(gl.SMOOTH)
	gl.ClearColor(0, 0, 0, 0)
	gl.ClearDepth(1)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
	gl.Hint(gl.PERSPECTIVE_CORRECTION_HINT, gl.NICEST)
	gl.DepthFunc(gl.NEVER)
	gl.Enable(gl.BLEND)
	gl.DepthMask(true)

	//loadShader()

	return
}
Example #3
0
func (v *Video) initGL() {
	if gl.Init() != 0 {
		panic(sdl.GetError())
	}

	gl.ClearColor(0.0, 0.0, 0.0, 1.0)
	gl.Enable(gl.CULL_FACE)
	gl.Enable(gl.DEPTH_TEST)

	v.prog = createProgram(vertShaderSrcDef, fragShaderSrcDef)
	posAttrib := v.prog.GetAttribLocation("vPosition")
	texCoordAttr := v.prog.GetAttribLocation("vTexCoord")
	v.textureUni = v.prog.GetAttribLocation("texture")

	v.texture = gl.GenTexture()
	gl.ActiveTexture(gl.TEXTURE0)
	v.texture.Bind(gl.TEXTURE_2D)

	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)

	v.prog.Use()
	posAttrib.EnableArray()
	texCoordAttr.EnableArray()

	vertVBO := gl.GenBuffer()
	vertVBO.Bind(gl.ARRAY_BUFFER)
	verts := []float32{-1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0}
	gl.BufferData(gl.ARRAY_BUFFER, len(verts)*int(unsafe.Sizeof(verts[0])), &verts[0], gl.STATIC_DRAW)

	textCoorBuf := gl.GenBuffer()
	textCoorBuf.Bind(gl.ARRAY_BUFFER)
	texVerts := []float32{0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0}
	gl.BufferData(gl.ARRAY_BUFFER, len(texVerts)*int(unsafe.Sizeof(texVerts[0])), &texVerts[0], gl.STATIC_DRAW)

	posAttrib.AttribPointer(2, gl.FLOAT, false, 0, uintptr(0))
	texCoordAttr.AttribPointer(2, gl.FLOAT, false, 0, uintptr(0))
}
Example #4
0
func main() {
	glfw.SetErrorCallback(errorCallback)
	// lock glfw/gl calls to a single thread
	runtime.LockOSThread()
	runtime.GOMAXPROCS(8) // Render, read commands, send input, extra for file loading, etc

	if !glfw.Init() {
		panic("Could not init glfw!")
	}

	defer glfw.Terminate()

	glfw.WindowHint(glfw.ContextVersionMajor, 3)
	glfw.WindowHint(glfw.ContextVersionMinor, 3)
	glfw.WindowHint(glfw.OpenglForwardCompatible, glfw.True)
	glfw.WindowHint(glfw.OpenglProfile, glfw.OpenglCoreProfile)

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

	window.SetFramebufferSizeCallback(func(w *glfw.Window, width, height int) {
		fmt.Printf("Framebuffer size is now %vx%v\n", width, height)
		// Keep aspect ratio from camwidth/camheight
		camRatio := camWidth / camHeight
		bufRatio := float32(width) / float32(height)
		var newWidth, newHeight float32

		switch {
		case camRatio > bufRatio:
			newHeight = float32(width) / camRatio
			newWidth = float32(width)
		case bufRatio > camRatio:
			newWidth = float32(height) * camRatio
			newHeight = float32(height)
		}

		fmt.Printf("Viewport size is now %vx%v; cam ratio is %v; viewport ratio is %v;\n", newWidth, newHeight, camRatio, newWidth/newHeight)

		gl.Viewport((width-int(newWidth))/2, (height-int(newHeight))/2, int(newWidth), int(newHeight))
	})

	defer window.Destroy()

	window.MakeContextCurrent()
	glfw.SwapInterval(1)

	gl.Init()

	// Enable blending
	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)

	vao := gl.GenVertexArray()
	vao.Bind()

	vbo := gl.GenBuffer()
	vbo.Bind(gl.ARRAY_BUFFER)

	verticies := []float32{-0.5, 0.5,
		0.5, 0.5,
		0.5, -0.5,
		-0.5, -0.5}

	gl.BufferData(gl.ARRAY_BUFFER, len(verticies)*4, verticies, gl.STATIC_DRAW)

	vertex_shader := gl.CreateShader(gl.VERTEX_SHADER)
	vertex_shader.Source(vertex)
	vertex_shader.Compile()
	fmt.Println(vertex_shader.GetInfoLog())
	defer vertex_shader.Delete()

	fragment_shader := gl.CreateShader(gl.FRAGMENT_SHADER)
	fragment_shader.Source(fragment)
	fragment_shader.Compile()
	fmt.Println(fragment_shader.GetInfoLog())
	defer fragment_shader.Delete()

	program := gl.CreateProgram()
	program.AttachShader(vertex_shader)
	program.AttachShader(fragment_shader)

	program.BindFragDataLocation(0, "outColor")
	program.Link()
	program.Use()
	defer program.Delete()

	positionAttrib := program.GetAttribLocation("position")
	positionAttrib.AttribPointer(2, gl.FLOAT, false, 0, nil)
	positionAttrib.EnableArray()
	defer positionAttrib.DisableArray()

	modelMat := program.GetUniformLocation("modelView")
	projMat := program.GetUniformLocation("projection")
	spriteSize := program.GetUniformLocation("size")

	cmd := exec.Command(os.Args[1], os.Args[2:]...)
	stdoutReader, stdoutWriter := io.Pipe()
	cmd.Stdout = stdoutWriter
	input := bufio.NewReader(stdoutReader)

	stdinReader, stdinWriter := io.Pipe()
	cmd.Stdin = stdinReader

	stderr, err := cmd.StderrPipe()
	chkErr(err)

	go io.Copy(os.Stderr, stderr)

	err = cmd.Start()
	chkErr(err)

	window.SetKeyCallback(handleKey)

	go func() {
		runtime.LockOSThread()
		for !window.ShouldClose() {
			sendInput(stdinWriter)
			//fmt.Fprintf(stdinWriter, "T %v\n", time.Now())
			<-ticks
			readCommands(input)
		}
	}()

	frameCnt := 0
	queueDepth := 0
	then := time.Now()

	for !window.ShouldClose() {
		frameCnt++
		queueDepth += len(commandBus)
		if frameCnt%120 == 0 {
			fmt.Printf("Queue depth: %v. Render time: %v. Decode time: %v.\n", queueDepth/120, time.Since(then)/120, decodeTime/time.Duration(decodes))
			queueDepth = 0
			then = time.Now()
			decodeTime = time.Duration(0)
			decodes = 0
		}

		for len(commandBus) > 0 {
			(<-commandBus)()
		}

		halfwidth := camWidth / 2.0
		halfheight := camHeight / 2.0
		projection := mathgl.Ortho2D(camera.x-halfwidth, camera.x+halfwidth, camera.y+halfheight, camera.y-halfheight)
		projection = mathgl.Scale3D(camera.sx, camera.sy, 1).Mul4(projection)
		projection = mathgl.HomogRotate3DZ(camera.rot).Mul4(projection)

		projMat.UniformMatrix4f(false, (*[16]float32)(&projection))

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

		for _, sprite := range sprites {
			sMat := mathgl.Scale3D(sprite.sx, sprite.sy, 1)
			sMat = mathgl.HomogRotate3DZ(sprite.rot).Mul4(sMat)
			sMat = mathgl.Translate3D(sprite.x, sprite.y, sprite.z).Mul4(sMat)

			// temp hack bank in
			sprite.bank = 1

			sMap := findSMap(sprite.smap)

			spriteSize.Uniform2f(float32(sMap.getWidth()*sprite.cellwidth), float32(sMap.getHeight()*sprite.cellheight))

			modelMat.UniformMatrix4f(false, (*[16]float32)(&sMat))
			gl.DrawArrays(gl.TRIANGLE_FAN, 0, 4)
		}

		window.SwapBuffers()
		glfw.PollEvents()

		if window.GetKey(glfw.KeyEscape) == glfw.Press {
			window.SetShouldClose(true)
		}
	}
}
Example #5
0
func main() {
	runtime.LockOSThread()

	flag.Parse()
	if *cpuprofile != "" {
		f, err := os.Create(*cpuprofile)
		if err != nil {
			log.Fatal(err)
		}
		pprof.StartCPUProfile(f)
		defer pprof.StopCPUProfile()
	}

	if err := sdl.Init(sdl.INIT_EVERYTHING); err != nil {
		panic(err)
	}
	defer sdl.Quit()

	sdl.GL_SetAttribute(sdl.GL_MULTISAMPLESAMPLES, 4)
	sdl.GL_SetAttribute(sdl.GL_CONTEXT_MAJOR_VERSION, 3)
	sdl.GL_SetAttribute(sdl.GL_CONTEXT_MINOR_VERSION, 3)
	sdl.GL_SetAttribute(sdl.GL_CONTEXT_PROFILE_MASK, sdl.GL_CONTEXT_PROFILE_CORE)
	sdl.GL_SetAttribute(sdl.GL_DOUBLEBUFFER, 1)
	sdl.GL_SetAttribute(sdl.GL_DEPTH_SIZE, 24)
	sdl.GL_SetAttribute(sdl.GL_CONTEXT_FLAGS, sdl.GL_CONTEXT_DEBUG_FLAG|sdl.GL_CONTEXT_FORWARD_COMPATIBLE_FLAG)

	window, err := sdl.CreateWindow("TOW", sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, 1024, 768, sdl.WINDOW_OPENGL|sdl.WINDOW_SHOWN|sdl.WINDOW_RESIZABLE)
	if err != nil {
		log.Fatal("can't create window", err)
	}
	defer window.Destroy()

	//defer renderer.Destroy()

	glcontext, err := sdl.GL_CreateContext(window)
	if err != nil {
		log.Fatal("can't create context", err)
	}
	defer sdl.GL_DeleteContext(glcontext)
	sdl.GL_MakeCurrent(window, glcontext)

	//err := gl.GlewInit()
	//fmt.Println(gl.GlewGetErrorString(err))
	//glew init
	gl.Init()
	sdl.GL_SetSwapInterval(1)

	fmt.Println("glVersion", gl.GetString(gl.VERSION))

	tw.Init(tw.OPENGL_CORE, nil)
	defer tw.Terminate()

	gl.GetError() // Ignore error
	debugContext.InitDebugContext()

	world := generation.GenerateWorld(64, 64, 2)
	gs := gamestate.NewGameState(window, world)
	defer gs.Delete()
	worldRenderer := rendering.NewWorldRenderer(window, gs.World)
	defer worldRenderer.Delete()

	gs.Bar.AddButton("screen shot", worldRenderer.ScreenShot, "")

	MainLoop(gs, worldRenderer)

	if *memprofile != "" {
		f, err := os.Create(*memprofile)
		if err != nil {
			panic(err)
		}
		pprof.WriteHeapProfile(f)
		f.Close()
		return
	}
}