Exemple #1
0
func CreateContext(width int, height int) (*Context, error) {
	if err := glfw.Init(); err != nil {
		fmt.Println("failed to initialize glfw:", err)
	}

	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(width, height, "flamingo", nil, nil)

	if err != nil {
		glfw.Terminate()
		return nil, err
	}

	window.MakeContextCurrent()

	// Initialize Glow
	if err = gl.Init(); err != nil {
		glfw.Terminate()
		return nil, err
	}

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

	return &Context{window}, nil
}
Exemple #2
0
func initGL() string {
	// Initialize Glow
	if err := gl.Init(); err != nil {
		panic(err)
	}

	version := gl.GoStr(gl.GetString(gl.VERSION))
	fmt.Println("OpenGL version", version)
	fmt.Println("OpenGl shading version", gl.GoStr(gl.GetString(gl.SHADING_LANGUAGE_VERSION)))
	fmt.Println("OpenGl renderer", gl.GoStr(gl.GetString(gl.RENDERER)))

	// Configure global settings
	gl.Enable(gl.DEPTH_TEST)
	gl.DepthFunc(gl.LESS)
	gl.ClearColor(0.5, 0.5, 0.5, 1.0)

	return version
}
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()
	}
}
Exemple #4
0
// New returns a newly created Screen
func New(width int, height int, fullscreen bool, FSAA int, name string) *Screen {
	window := &Screen{}

	C.SDL_Init(C.SDL_INIT_VIDEO)
	C.setGlContextAttributes()

	C.SDL_GL_SetAttribute(C.SDL_GL_DOUBLEBUFFER, 1)

	// Force hardware accel
	C.SDL_GL_SetAttribute(C.SDL_GL_ACCELERATED_VISUAL, 1)

	if FSAA > 0 {
		// FSAA (Fullscreen antialiasing)
		C.SDL_GL_SetAttribute(C.SDL_GL_MULTISAMPLEBUFFERS, 1)
		C.SDL_GL_SetAttribute(C.SDL_GL_MULTISAMPLESAMPLES, C.int(FSAA)) // 2, 4, 8
	}

	flags := C.SDL_WINDOW_OPENGL | C.SDL_RENDERER_ACCELERATED
	if fullscreen {
		flags = flags | C.SDL_WINDOW_FULLSCREEN
	}

	C.SDL_CreateWindowAndRenderer(C.int(width), C.int(height), C.Uint32(flags), &window.sdlWindow, &window.renderer)
	C.SDL_SetWindowTitle(window.sdlWindow, C.CString(name))
	C.SDL_GL_CreateContext(window.sdlWindow)

	if err := gl.Init(); err != nil {
		panic(err)
	}
	version := gl.GoStr(gl.GetString(gl.VERSION))
	fmt.Println("OpenGL version", version)

	// Configure global settings
	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)

	gl.ClearColor(0.0, 0.0, 0.0, 1.0)
	gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

	window.Width = width
	window.Height = height
	window.name = name
	window.shouldClose = false
	C.SDL_GL_SwapWindow(window.sdlWindow)

	window.startTime = time.Now()
	window.frameTime = time.Now()
	C.SDL_GL_SetSwapInterval(1)
	window.vsync = true

	return window
}
Exemple #5
0
func (screen *Screen) Init(title string, onCloseHandler func(), chip *chip8.Chip8) {
	var err error

	screen.chip = chip

	err = glfw.Init()

	if err != nil {
		panic(err)
	}

	window, err := glfw.CreateWindow(SCREEN_WIDTH, SCREEN_HEIGHT, title, nil, nil)
	if err != nil {
		panic(err)
	}

	window.MakeContextCurrent()

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

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

	gl.ClearColor(255.0, 0.0, 0.0, 0.0)                          //Set the cleared screen colour to black
	gl.Viewport(0, 0, int32(SCREEN_WIDTH), int32(SCREEN_HEIGHT)) //This sets up the viewport so that the coordinates (0, 0) are at the top left of the window

	for !window.ShouldClose() {
		// Do OpenGL stuff
		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
		window.SwapBuffers()
		glfw.PollEvents()
	}

	onCloseHandler()

}
/* *****************  MAIN FUNCTION  ************************ */
func main() {

	/* ****************    OVR INIT CODE  ***************** */

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

	defer glfw.Terminate()
	C.ovr_Initialize(nil)

	//create an HMD for reference.
	var hmd C.ovrHmd = nil

	// find number of headsets
	hmdCount := (int)(C.ovrHmd_Detect())
	// print headset count
	fmt.Println(hmdCount)
	fmt.Printf("Found %d connected Rift device(s)\n\n", hmdCount)

	// grab the first headset
	if hmdCount > 0 {
		for i := 0; i < 1; i++ {
			hmd = C.ovrHmd_Create((C.int)(i))
			//Print headset name
			fmt.Println(C.GoString(hmd.ProductName))
		}
	}

	//if there is no headset connected, create a new debug.
	if hmd == nil {

		fmt.Println("Unable to open rift device\n Creating debug device.\n")
		hmd = C.ovrHmd_CreateDebug(C.ovrHmd_DK2)
	}

	//Starts the sensor device
	if C.ovrHmd_ConfigureTracking(hmd, C.ovrTrackingCap_Orientation|C.ovrTrackingCap_Position, 0) == 0 {
		fmt.Println("Unable to start Rift head tracker\n")

	}

	//extendedMode := C.ovrHmdCap_ExtendDesktop & hmd.HmdCaps

	//positioning of window and size of window
	var outposition mgl32.Vec2
	outposition[0] = (float32)(hmd.WindowsPos.x)
	outposition[1] = (float32)(hmd.WindowsPos.y)

	//TODO: Change this to output at chosen resolution, not necessarily native pg. 76 Oculus Rift in action
	var outsize mgl32.Vec2
	outsize[0] = (float32)(hmd.Resolution.w)
	outsize[1] = (float32)(hmd.Resolution.h)

	//print position and sizes to console
	fmt.Printf("Rift position:\t\t %f \t %f \nRift Size:\t\t %f \t %f \n\n", outposition.X(), outposition.Y(), outsize.X(), outsize.Y())

	monitors := glfw.GetMonitors()
	var riftIndex int
	//loop over the monitors
	for index, element := range monitors {
		//print the monitor positions
		posX, posY := element.GetPos()
		fmt.Printf("Monitor Position:\t\t %d \t %d\n", posX, posY)

		if float32(posX) == outposition.X() && float32(posY) == outposition.Y() {

			riftIndex = index
		}
	}

	//Get video mode of monitor
	mode := monitors[riftIndex].GetVideoMode()
	outsize[0] = float32(mode.Width)
	outsize[1] = float32(mode.Height)

	/* ***************************************************** */

	// *************  OPENGL / GLFW INIT CODE  ************** */

	glfw.WindowHint(glfw.Decorated, 0)
	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(int(outsize.X()), int(outsize.Y()), "LinuxVR", nil, nil)
	window.SetPos(int(outposition.X()), int(outposition.Y()))

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

	window.MakeContextCurrent()

	//Print OpenGL Version to console
	version := gl.GoStr(gl.GetString(gl.VERSION))
	fmt.Println("OpenGL Version", version, "\n\n")

	//keyboard input callback
	window.SetKeyCallback(onKey)

	/* **************************************************** */

	previousTime := glfw.GetTime()
	totalTime := 0.0000

	/* *******************   MAIN LOOP  ******************** */

	for !window.ShouldClose() {

		glfw.PollEvents()

		//Update
		time := glfw.GetTime()
		elapsed := time - previousTime
		previousTime = time
		totalTime = totalTime + elapsed

		//get current head state
		state := C.ovrHmd_GetTrackingState(hmd, 0)
		orientation := state.HeadPose.ThePose.Orientation

		//convert to go type float32
		var q mgl32.Quat
		q.W = (float32)(orientation.w)
		q.V[0] = (float32)(orientation.x)
		q.V[1] = (float32)(orientation.y)
		q.V[2] = (float32)(orientation.z)

		//publish tracking information once a second
		if totalTime >= 1 {
			fmt.Printf("w: %f X: %f Y: %f Z: %f\n", q.W, q.X(), q.Y(), q.Z())
			totalTime = 0
		}

		//basic opengl things

		draw(window)

		//Swap buffers
		window.SwapBuffers()

		//Poll for events (keyboard, resize, etc)

	}

	/* *****************  OVR SHUTDOWN  ******************** */
	C.ovrHmd_Destroy(hmd)
	C.ovr_Shutdown()

}
Exemple #7
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, 4)
	glfw.WindowHint(glfw.ContextVersionMinor, 1)
	glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
	glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
	window, err := glfw.CreateWindow(windowWidth, windowHeight, "Cube", nil, nil)

	if err != nil {
		panic(err)
	}
	window.MakeContextCurrent()

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

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

	// Configure the vertex and fragment shaders
	program, err := newProgram(vertexShader, fragmentShader)

	if err != nil {
		panic(err)
	}

	gl.UseProgram(program)

	projection := mgl32.Perspective(mgl32.DegToRad(45.0), float32(windowWidth)/windowHeight, 0.1, 10.0)
	projectionUniform := gl.GetUniformLocation(program, gl.Str("projection\x00"))
	gl.UniformMatrix4fv(projectionUniform, 1, false, &projection[0])

	camera := mgl32.LookAtV(mgl32.Vec3{3, 3, 3}, mgl32.Vec3{0, 0, 0}, mgl32.Vec3{0, 1, 0})
	cameraUniform := gl.GetUniformLocation(program, gl.Str("camera\x00"))
	gl.UniformMatrix4fv(cameraUniform, 1, false, &camera[0])

	model := mgl32.Ident4()
	modelUniform := gl.GetUniformLocation(program, gl.Str("model\x00"))
	gl.UniformMatrix4fv(modelUniform, 1, false, &model[0])

	textureUniform := gl.GetUniformLocation(program, gl.Str("tex\x00"))
	gl.Uniform1i(textureUniform, 0)

	gl.BindFragDataLocation(program, 0, gl.Str("outputColor\x00"))

	// Load the texture
	texture, err := newTexture("square.png")
	if err != nil {
		panic(err)
	}

	// Configure the vertex data
	var vao uint32
	gl.GenVertexArrays(1, &vao)
	gl.BindVertexArray(vao)

	var vbo uint32
	gl.GenBuffers(1, &vbo)
	gl.BindBuffer(gl.ARRAY_BUFFER, vbo)
	gl.BufferData(gl.ARRAY_BUFFER, len(cubeVertices)*4, gl.Ptr(cubeVertices), gl.STATIC_DRAW)

	vertAttrib := uint32(gl.GetAttribLocation(program, gl.Str("vert\x00")))
	gl.EnableVertexAttribArray(vertAttrib)
	gl.VertexAttribPointer(vertAttrib, 3, gl.FLOAT, false, 5*4, gl.PtrOffset(0))

	texCoordAttrib := uint32(gl.GetAttribLocation(program, gl.Str("vertTexCoord\x00")))
	gl.EnableVertexAttribArray(texCoordAttrib)
	gl.VertexAttribPointer(texCoordAttrib, 2, gl.FLOAT, false, 5*4, gl.PtrOffset(3*4))

	// Configure global settings
	gl.Enable(gl.DEPTH_TEST)
	gl.DepthFunc(gl.LESS)
	gl.ClearColor(1.0, 1.0, 1.0, 1.0)

	angle := 0.0
	previousTime := glfw.GetTime()

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

		// Update
		time := glfw.GetTime()
		elapsed := time - previousTime
		previousTime = time

		angle += elapsed
		model = mgl32.HomogRotate3D(float32(angle), mgl32.Vec3{0, 1, 0})

		// Render
		gl.UseProgram(program)
		gl.UniformMatrix4fv(modelUniform, 1, false, &model[0])

		gl.BindVertexArray(vao)

		gl.ActiveTexture(gl.TEXTURE0)
		gl.BindTexture(gl.TEXTURE_2D, texture)

		gl.DrawArrays(gl.TRIANGLES, 0, 6*2*3)

		// Maintenance
		window.SwapBuffers()
		glfw.PollEvents()
	}
}
Exemple #8
0
func Main() {
	err := glfw.Init()
	if err != nil {
		panic(err)
	}
	defer glfw.Terminate()

	glfw.WindowHint(glfw.Resizable, glfw.False)
	glfw.WindowHint(glfw.ContextVersionMajor, 3)
	glfw.WindowHint(glfw.ContextVersionMinor, 2)
	glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
	glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
	window, err := glfw.CreateWindow(WindowWidth, WindowHeight, "Cube", nil, nil)
	Window = window
	if err != nil {
		panic(err)
	}
	window.MakeContextCurrent()

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

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

	// Configure the vertex and fragment shaders
	program, err := newProgram("SimpleVertexShader.vertexshader", "SimpleFragmentShader.fragmentshader")
	if err != nil {
		panic(err)
	}
	gl.UseProgram(program)

	projection := mgl32.Perspective(mgl32.DegToRad(45.0), float32(WindowWidth)/WindowHeight, 0.1, 10.0)
	projectionUniform := gl.GetUniformLocation(program, gl.Str("projection\x00"))
	gl.UniformMatrix4fv(projectionUniform, 1, false, &projection[0])

	camera := mgl32.LookAtV(mgl32.Vec3{3, 3, 3}, mgl32.Vec3{0, 0, 0}, mgl32.Vec3{0, 1, 0})
	cameraUniform := gl.GetUniformLocation(program, gl.Str("camera\x00"))
	gl.UniformMatrix4fv(cameraUniform, 1, false, &camera[0])

	model := mgl32.Ident4()
	modelUniform := gl.GetUniformLocation(program, gl.Str("model\x00"))
	gl.UniformMatrix4fv(modelUniform, 1, false, &model[0])

	textureUniform := gl.GetUniformLocation(program, gl.Str("tex\x00"))
	gl.Uniform1i(textureUniform, 0)

	gl.BindFragDataLocation(program, 0, gl.Str("outputColor\x00"))
	// Configure global settings
	gl.Enable(gl.DEPTH_TEST)
	gl.DepthFunc(gl.LESS)
	gl.ClearColor(1.0, 1.0, 1.0, 1.0)

	angle := 0.0
	previousTime := glfw.GetTime()

	width, height := window.GetSize()
	window.SetCursorPos(float64(width/2), float64(height/2))
	window.SetKeyCallback(input.OnKey)
	window.SetCursorPosCallback(input.OnCursor)
	window.SetMouseButtonCallback(input.OnMouse)

	meshes.LoadColladaCube("cube.dae")

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

		// Update
		time := glfw.GetTime()
		elapsed := time - previousTime
		previousTime = time

		angle += elapsed
		model = mgl32.HomogRotate3D(float32(angle), mgl32.Vec3{0, 1, 0})

		// Render
		gl.UseProgram(program)
		// gl.UniformMatrix4fv(modelUniform, 1, false, &model[0])
		player.MainPlayer.Draw(program)
		for _, element := range game.Universe {
			(element).Draw(program)
		}

		// Maintenance
		window.SwapBuffers()
		glfw.PollEvents()
	}
}
Exemple #9
0
func printOpenGlVersionInfo() {
	fmt.Printf("%s\n", gl.GoStr(gl.GetString(gl.RENDERER)))
	fmt.Printf("%s\n", gl.GoStr(gl.GetString(gl.VERSION)))
}