// NewGameState creates a new game state. It needs a window onto which
// render the scene.
func NewGameState(window mandala.Window) *GameState {
	s := new(GameState)
	s.window = window

	s.window.MakeContextCurrent()

	w, h := window.GetSize()

	s.World = NewWorld(w, h)

	s.Fps = DefaultFps

	// Uncomment the following lines to generate the world
	// starting from a string (defined in world.go)

	// s.World.CreateFromString(pyramid)
	// s.World.setGround(newGround(s.World, 0, float32(10), float32(w), float32(10)))

	s.World.CreateFromSvg("raw/world.svg")

	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)

	return s
}
Exemple #2
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// Run runs renderLoop. The loop renders a frame and swaps the buffer
// at each tick received.
func renderLoopFunc(control *renderLoopControl) loop.LoopFunc {

	return func(loop loop.Loop) error {
		var window mandala.Window
		// Lock/unlock the loop to the current OS thread. This is
		// necessary because OpenGL functions should be called from
		// the same thread.
		runtime.LockOSThread()
		defer runtime.UnlockOSThread()

		// Create an instance of ticker and immediately stop
		// it because we don't want to swap buffers before
		// initializing a rendering state.
		ticker := time.NewTicker(time.Duration(1e9 / int(FRAMES_PER_SECOND)))
		ticker.Stop()

		for {
			select {
			case window = <-control.window:
				ticker.Stop()

				window.MakeContextCurrent()

				width, height := window.GetSize()
				gl.Viewport(0, 0, width, height)

				mandala.Logf("Restarting rendering loop...")
				ticker = time.NewTicker(time.Duration(1e9 / int(FRAMES_PER_SECOND)))

				// Compute window radius
				windowRadius = math.Sqrt(math.Pow(float64(height), 2) + math.Pow(float64(width), 2))

				//gl.Init()
				gl.Disable(gl.DEPTH_TEST)
				// antialiasing
				gl.Enable(gl.BLEND)
				gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
				//gl.Enable(gl.LINE_SMOOTH)

			// At each tick render a frame and swap buffers.
			case <-ticker.C:
				draw()
				window.SwapBuffers()

			case event := <-control.pause:
				ticker.Stop()
				event.Paused <- true

			case <-control.resume:

			case <-loop.ShallStop():
				ticker.Stop()
				return nil
			}
		}
	}
}
Exemple #3
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func (t *TestSuite) TestRotate() {
	filename := "expected_hello_world_rotated.png"

	t.rlControl.drawFunc <- func() {
		w, h := t.renderState.window.GetSize()
		world := newWorld(w, h)

		// Render an "Hello World" string
		text, err := world.font.Printf("%s", "Hello World!")
		if err != nil {
			panic(err)
		}

		text.AttachToWorld(world)
		text.MoveTo(float32(world.width/2)+5, -5.0)
		text.Rotate(45)

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

		gl.Clear(gl.COLOR_BUFFER_BIT)
		text.Draw()

		t.testDraw <- testlib.Screenshot(t.renderState.window)
		t.renderState.window.SwapBuffers()
	}

	distance, exp, act, err := testlib.TestImage(filename, <-t.testDraw, imagetest.Center)
	if err != nil {
		panic(err)
	}

	t.True(distance < distanceThreshold, distanceError(distance, filename))
	if t.Failed() {
		saveExpAct(t.outputPath, "failed_"+filename, exp, act)
	}
}