Golang glfw.Window类代码示例

// key events are a way to get input from GLFW.
func keyCallback(w *glfw.Window, key glfw.Key, scancode int, action glfw.Action, mods glfw.ModifierKey) {
	//if u only want the on press, do = && && action == glfw.Press
	if key == glfw.KeyW && action == glfw.Press {
		fmt.Printf("W Pressed!\n")
		player.moveUp()
	}
	if key == glfw.KeyA { //&& action == glfw.Press
		fmt.Printf("A Pressed!\n")
		if action == glfw.Release {
			player.moving_left = false
		}
		if action == glfw.Press {
			player.moving_left = true
		}
		// player.moveLeft()
	}
	if key == glfw.KeyS {
		fmt.Printf("S Pressed!\n")
		player.moveDown()
	}
	if key == glfw.KeyD {
		fmt.Printf("D Pressed!\n")
		if action == glfw.Release {
			player.moving_right = false
		}
		if action == glfw.Press {
			player.moving_right = true
		}
		// player.moveRight()
	}

	if key == glfw.KeyEscape && action == glfw.Press {
		w.SetShouldClose(true)
	}
}

func (state *State) Render(window *glfw.Window) {
	if !state.Dirty {
		return
	}
	state.Dirty = false

	state.Reset(window)
	state.Time = time.Now()
	state.UpdateInput(window)

	hue := float32(state.Time.UnixNano()/1e6%360) / 360.0
	Highlight = ui.ColorHSLA(hue, 0.7, 0.7, 1.0)

	w, h := window.GetSize()
	root := &ui.Context{
		Backend: state.Backend,
		Input:   state.Input,
		Area:    ui.Block(0, 0, float32(w), float32(h)),
	}

	if root.Input.Mouse.Drag != nil {
		if !root.Input.Mouse.Drag(root) {
			root.Input.Mouse.Drag = nil
		}
	}

	state.Backend.SetBack(ui.ColorHex(0xEEEEEEFF))
	state.Backend.SetFore(ui.ColorHex(0xCCCCCCFF))
	state.Backend.SetFontColor(ui.ColorHex(0x000000FF))

	view := NewView(state, root, &state.Timeline)
	view.Render()
}

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()
	}
}

// key events are a way to get input from GLFW.
func keyCallback(w *glfw.Window, key glfw.Key, scancode int, action glfw.Action, mods glfw.ModifierKey) {
	//if u only want the on press, do = && && action == glfw.Press
	player := game.Player

	if key == glfw.KeyW && action == glfw.Press {
		fmt.Printf("W Pressed!\n")
		player.Jump()

	}
	if key == glfw.KeyA { //&& action == glfw.Press
		fmt.Printf("A Pressed!\n")
		player.MoveLeft()
	}
	if key == glfw.KeyS {
		fmt.Printf("S Pressed!\n")
	}
	if key == glfw.KeyD {
		fmt.Printf("D Pressed!\n")
		player.MoveRight()

	}

	if key == glfw.KeyEscape && action == glfw.Press {
		w.SetShouldClose(true)
	}
}

// mainKeyCallback is the main keyboard input callback for the game
func gameKeyCallback(w *glfw.Window, key glfw.Key, scancode int, action glfw.Action, mods glfw.ModifierKey) {
	switch {
	// NOTE: For testing purposes, we'll exit on esc button
	case key == glfw.KeyEscape && action == glfw.Press:
		w.SetShouldClose(true)
	}
}

func keyCallback(window *glfw.Window, key glfw.Key, scancode int, action glfw.Action, mods glfw.ModifierKey) {
	// When a user presses the escape key, we set the WindowShouldClose property to true,
	// which closes the application
	if key == glfw.KeyEscape && action == glfw.Press {
		window.SetShouldClose(true)
	}
}

func onKey(w *glfw.Window, key glfw.Key, scancode int, action glfw.Action, mods glfw.ModifierKey) {
	switch {
	case key == glfw.KeyEscape && action == glfw.Press,
		key == glfw.KeyQ && action == glfw.Press:
		w.SetShouldClose(true)
	}
}

/* *****************  KEYBOARD INPUT ******************** */
func onKey(w *glfw.Window, key glfw.Key, scancode int,
	action glfw.Action, mods glfw.ModifierKey) {

	if key == glfw.KeyEscape && action == glfw.Press {
		fmt.Println("Close Window")
		w.SetShouldClose(true)
	}
}

func (state *State) UpdateInput(window *glfw.Window) {
	state.Input.Update()

	x, y := window.GetCursorPos()
	state.Input.Mouse.Position.X = float32(x)
	state.Input.Mouse.Position.Y = float32(y)
	state.Input.Mouse.Down = window.GetMouseButton(glfw.MouseButtonLeft) == glfw.Press
}

func keyCallback(w *glfw.Window, key glfw.Key, scancode int, action glfw.Action, mods glfw.ModifierKey) {
	// Key W == close app
	if key == glfw.KeyEscape && action == glfw.Press {
		w.SetShouldClose(true)
	}
	if key == glfw.KeySpace && action == glfw.Press {
		fire()
	}
}

func (c *chip8) setKeys(window *glfw.Window) {
	for k, v := range keyvalues {	
		if window.GetKey(k) == glfw.Release {
			c.key[v] = true
		} else {
			c.key[v] = false
		}
	}
}

func onFocus(w *glfw.Window, focused bool) {
	if !focused {
		for i := range Client.KeyState {
			Client.KeyState[i] = false
		}
	} else if lockMouse {
		w.SetInputMode(glfw.CursorMode, glfw.CursorDisabled)
	}
}

func drawScene(w *glfw.Window) {
	width, height := w.GetFramebufferSize()
	ratio := float32(width) / float32(height)
	var x1, x2, y1, y2 float32
	if ratio > 1 {
		x1, x2, y1, y2 = -ratio, ratio, -1, 1
	} else {
		x1, x2, y1, y2 = -1, 1, -1/ratio, 1/ratio
	}

	gl.Viewport(0, 0, int32(width), int32(height))
	gl.Clear(gl.COLOR_BUFFER_BIT)

	// Applies subsequent matrix operations to the projection matrix stack
	gl.MatrixMode(gl.PROJECTION)

	gl.LoadIdentity()                                                   // replace the current matrix with the identity matrix
	gl.Ortho(float64(x1), float64(x2), float64(y1), float64(y2), 1, -1) // multiply the current matrix with an orthographic matrix

	// Applies subsequent matrix operations to the modelview matrix stack
	gl.MatrixMode(gl.MODELVIEW)

	gl.LoadIdentity()

	gl.LineWidth(1)
	gl.Begin(gl.LINE)   // delimit the vertices of a primitive or a group of like primitives
	gl.Color3f(0, 0, 0) // set the current color
	gl.Vertex3f(0, y1, 0)
	gl.Vertex3f(0, y2, 0)
	gl.Vertex3f(x1, 0, 0)
	gl.Vertex3f(x2, 0, 0)
	gl.End()

	gl.Rotatef(float32(glfw.GetTime()*50), 0, 0, 1) // multiply the current matrix by a rotation matrix

	s := float32(.95)

	gl.Begin(gl.TRIANGLES)
	gl.Color3f(1, 0, 0)  // set the current color
	gl.Vertex3f(0, s, 0) // specify a vertex
	gl.Color3f(0, 1, 0)
	gl.Vertex3f(s*.866, s*-0.5, 0)
	gl.Color3f(0, 0, 1)
	gl.Vertex3f(s*-.866, s*-0.5, 0)
	gl.End()

	gl.LineWidth(5)
	gl.Begin(gl.LINE_LOOP)
	for i := float64(0); i < 2*math.Pi; i += .05 {
		r, g, b := hsb2rgb(float32(i/(2*math.Pi)), 1, 1)
		gl.Color3f(r, g, b)
		gl.Vertex3f(s*float32(math.Sin(i)), s*float32(math.Cos(i)), 0)
	}
	gl.End()

}

// onResize sets up a simple 2d ortho context based on the window size
func onResize(window *glfw.Window, w, h int) {
	w, h = window.GetSize() // query window to get screen pixels
	width, height := window.GetFramebufferSize()
	gl.Viewport(0, 0, int32(width), int32(height))
	gl.MatrixMode(gl.PROJECTION)
	gl.LoadIdentity()
	gl.Ortho(0, float64(w), 0, float64(h), -1, 1)
	gl.MatrixMode(gl.MODELVIEW)
	gl.LoadIdentity()
	gl.ClearColor(1, 1, 1, 1)
}

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()
	}
}