Example #1
0
func main() {

	sdl.Init(sdl.INIT_VIDEO)

	var screen = sdl.SetVideoMode(640, 480, 32, sdl.OPENGL)

	if screen == nil {
		panic("sdl error")
	}

	if gl.Init() != 0 {
		panic("gl error")
	}

	pen := Pen{}

	gl.MatrixMode(gl.PROJECTION)

	gl.Viewport(0, 0, int(screen.W), int(screen.H))
	gl.LoadIdentity()
	gl.Ortho(0, float64(screen.W), float64(screen.H), 0, -1.0, 1.0)

	gl.ClearColor(1, 1, 1, 0)
	gl.Clear(gl.COLOR_BUFFER_BIT)

	var running = true

	for running {

		for e := sdl.PollEvent(); e != nil; e = sdl.PollEvent() {
			switch ev := e.(type) {
			case *sdl.QuitEvent:
				running = false
			case *sdl.KeyboardEvent:
				if ev.Keysym.Sym == sdl.K_ESCAPE {
					running = false
				}
			case *sdl.MouseMotionEvent:
				if ev.State != 0 {
					pen.lineTo(Point{int(ev.X), int(ev.Y)})
				} else {
					pen.moveTo(Point{int(ev.X), int(ev.Y)})
				}
			}
		}

		sdl.GL_SwapBuffers()
		sdl.Delay(25)
	}

	sdl.Quit()

}
Example #2
0
func main() {

	flag.Parse()

	var done bool
	var keys []uint8

	sdl.Init(sdl.INIT_VIDEO)

	var screen = sdl.SetVideoMode(300, 300, 16, sdl.OPENGL|sdl.RESIZABLE)

	if screen == nil {
		sdl.Quit()
		panic("Couldn't set 300x300 GL video mode: " + sdl.GetError() + "\n")
	}

	if gl.Init() != 0 {
		panic("gl error")
	}

	sdl.WM_SetCaption("Gears", "gears")

	init_()
	reshape(int(screen.W), int(screen.H))
	done = false
	for !done {

		idle()
		for e := sdl.PollEvent(); e != nil; e = sdl.PollEvent() {
			switch e.(type) {
			case *sdl.ResizeEvent:
				re := e.(*sdl.ResizeEvent)
				screen = sdl.SetVideoMode(int(re.W), int(re.H), 16,
					sdl.OPENGL|sdl.RESIZABLE)
				if screen != nil {
					reshape(int(screen.W), int(screen.H))
				} else {
					panic("we couldn't set the new video mode??")
				}
				break

			case *sdl.QuitEvent:
				done = true
				break
			}
		}
		keys = sdl.GetKeyState()

		if keys[sdl.K_ESCAPE] != 0 {
			done = true
		}
		if keys[sdl.K_UP] != 0 {
			view_rotx += 5.0
		}
		if keys[sdl.K_DOWN] != 0 {
			view_rotx -= 5.0
		}
		if keys[sdl.K_LEFT] != 0 {
			view_roty += 5.0
		}
		if keys[sdl.K_RIGHT] != 0 {
			view_roty -= 5.0
		}
		if keys[sdl.K_z] != 0 {
			if (sdl.GetModState() & sdl.KMOD_RSHIFT) != 0 {
				view_rotz -= 5.0
			} else {
				view_rotz += 5.0
			}
		}

		draw()
	}
	sdl.Quit()
	return

}
Example #3
0
func main() {
	runtime.LockOSThread()
	flag.Parse()
	buildPalette()
	sdl.Init(sdl.INIT_VIDEO)
	defer sdl.Quit()

	sdl.GL_SetAttribute(sdl.GL_SWAP_CONTROL, 1)

	if sdl.SetVideoMode(512, 512, 32, sdl.OPENGL) == nil {
		panic("sdl error")
	}

	if gl.Init() != 0 {
		panic("gl error")
	}

	sdl.WM_SetCaption("Gomandel", "Gomandel")

	gl.Enable(gl.TEXTURE_2D)
	gl.Viewport(0, 0, 512, 512)
	gl.MatrixMode(gl.PROJECTION)
	gl.LoadIdentity()
	gl.Ortho(0, 512, 512, 0, -1, 1)

	gl.ClearColor(0, 0, 0, 0)

	//-----------------------------------------------------------------------------
	var dndDragging bool = false
	var dndStart Point
	var dndEnd Point
	var tex gl.Texture
	var tc TexCoords
	var lastProgress int
	initialRect := Rect{-1.5, -1.5, 3, 3}
	rect := initialRect

	rc := new(MandelbrotRequest)
	rc.MakeRequest(512, 512, rect)
	rc.WaitFor(Small, &tex, &tc)

	running := true
	for running {
		for e := sdl.PollEvent(); e != nil; e = sdl.PollEvent() {
			switch e.(type) {
			case *sdl.QuitEvent:
				running = false
			case *sdl.MouseButtonEvent:
				mbe := e.(*sdl.MouseButtonEvent)
				if mbe.Type == sdl.MOUSEBUTTONDOWN {
					dndDragging = true
					sdl.GetMouseState(&dndStart.X, &dndStart.Y)
					dndEnd = dndStart
				} else {
					dndDragging = false
					sdl.GetMouseState(&dndEnd.X, &dndEnd.Y)
					if mbe.Which == 3 {
						rect = initialRect
					} else {
						rect = rectFromSelection(dndStart, dndEnd, 512, 512, rect)
						tc = texCoordsFromSelection(dndStart, dndEnd, 512, 512, tc)
					}

					// make request
					rc.MakeRequest(512, 512, rect)
				}
			case *sdl.MouseMotionEvent:
				if dndDragging {
					sdl.GetMouseState(&dndEnd.X, &dndEnd.Y)
				}
			}
		}

		// if we're waiting for a result, check if it's ready
		p := rc.Update(&tex, &tc)
		if p != -1 {
			lastProgress = p
		}

		gl.Clear(gl.COLOR_BUFFER_BIT)
		tex.Bind(gl.TEXTURE_2D)
		drawQuad(0, 0, 512, 512, tc.TX, tc.TY, tc.TX2, tc.TY2)
		gl.BindTexture(gl.TEXTURE_2D, 0)
		if dndDragging {
			drawSelection(dndStart, dndEnd)
		}
		drawProgress(512, 512, lastProgress, rc.Pending)
		sdl.GL_SwapBuffers()
	}
}