Esempio n. 1
0
// NewOpenGl initializes the Gl bindings and returns an OpenGl instance.
func NewOpenGl() *OpenGl {
	opengl := &OpenGl{}

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

	return opengl
}
Esempio n. 2
0
func (w Window) init() error {

	sdl.GL_SetAttribute(sdl.GL_DOUBLEBUFFER, 1)
	sdl.GL_SetAttribute(sdl.GL_RED_SIZE, 8)
	sdl.GL_SetAttribute(sdl.GL_GREEN_SIZE, 8)
	sdl.GL_SetAttribute(sdl.GL_BLUE_SIZE, 8)
	sdl.GL_SetAttribute(sdl.GL_ALPHA_SIZE, 8)

	if err := gl.Init(); err != nil {
		return errors.New("Cannot initialize OGL: ")
	}

	gl.Viewport(0, 0, int32(w.Width), int32(w.Height))
	Opengl.CreateBuffers(w.Width, w.Height)

	return nil
}
Esempio n. 3
0
func main() {
	var (
		err     error
		window  *sdl.Window
		context sdl.GLContext
	)

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

	sdl.GL_SetAttribute(sdl.GL_CONTEXT_MAJOR_VERSION, 3)
	sdl.GL_SetAttribute(sdl.GL_CONTEXT_MINOR_VERSION, 2)
	sdl.GL_SetAttribute(sdl.GL_CONTEXT_PROFILE_MASK, sdl.GL_CONTEXT_PROFILE_CORE)

	window, err = sdl.CreateWindow(winTitle, sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, winWidth, winHeight, sdl.WINDOW_OPENGL)
	if err != nil {
		panic(err)
	}
	defer window.Destroy()

	context, err = sdl.GL_CreateContext(window)
	if err != nil {
		panic(err)
	}
	defer sdl.GL_DeleteContext(context)

	if err = sdl.GL_MakeCurrent(window, context); err != nil {
		panic(err)
	}

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

	printGLInfo()
	cameraMatrixUniform := setupGL()
	windowLoop(window, cameraMatrixUniform)
}