func main() {
if err := glfw.Init(); err != nil {
fmt.Fprintf(os.Stderr, "%s\n", err.Error())
return
}
defer glfw.Terminate()
glfw.OpenWindowHint(glfw.FsaaSamples, 4)
glfw.OpenWindowHint(glfw.OpenGLVersionMajor, 3)
glfw.OpenWindowHint(glfw.OpenGLVersionMinor, 3)
glfw.OpenWindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
if err := glfw.OpenWindow(1024, 768, 0, 0, 0, 0, 32, 0, glfw.Windowed); err != nil {
fmt.Fprintf(os.Stderr, "%s\n", err.Error())
return
}
gl.Init()
gl.GetError() // Ignore error
glfw.SetWindowTitle("Tutorial 01")
glfw.Enable(glfw.StickyKeys)
gl.ClearColor(0., 0., 0.4, 0.)
// Equivalent to a do... while
for ok := true; ok; ok = (glfw.Key(glfw.KeyEsc) != glfw.KeyPress && glfw.WindowParam(glfw.Opened) == gl.TRUE) {
glfw.SwapBuffers()
}
}
// Initialize the window. Returns an error if glfw or glew throws one.
func InitWindow(width, height int) error {
Width, Height = width, height
err := glfw.Init()
if err != nil {
return err
}
err = glfw.OpenWindow(Width, Height, 0, 0, 0, 32, 32, 32, glfw.Windowed)
if err != nil {
return err
}
WindowOpened = true
glfw.SetWindowTitle("Goliath")
glfw.Enable(glfw.KeyRepeat)
if ret := gl.Init(); ret != 0 {
return fmt.Errorf("failed to initialize GLEW: %d", ret)
}
// Set GL states
gl.ClearColor(0.0, 0.0, 0.0, 1.0)
gl.Enable(gl.CULL_FACE)
gl.CullFace(gl.BACK)
gl.FrontFace(gl.CCW)
err = InitShaders()
if err != nil {
return err
}
InitCamera(Width, Height)
return nil
}
// initGL initializes GLFW and OpenGL.
func initGL() error {
err := glfw.Init()
if err != nil {
return err
}
err = glfw.OpenWindow(AtlasSize, AtlasSize, 8, 8, 8, 8, 0, 0, glfw.Windowed)
if err != nil {
glfw.Terminate()
return err
}
glfw.SetWindowTitle("Texture atlas example")
glfw.SetSwapInterval(1)
glfw.SetWindowSizeCallback(onResize)
glfw.SetKeyCallback(onKey)
gl.Init()
if err = glh.CheckGLError(); err != nil {
return err
}
gl.Disable(gl.DEPTH_TEST)
gl.Disable(gl.LIGHTING)
gl.Enable(gl.TEXTURE_2D)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.ClearColor(0.2, 0.2, 0.23, 1.0)
return nil
}
func (v *Video) Init(w int, h int) {
var err error
if err = glfw.Init(); err != nil {
log.Fatal(err)
}
glfw.OpenWindowHint(glfw.WindowNoResize, gl.TRUE)
if err = glfw.OpenWindow(w, h, 8, 8, 8, 0, 24, 0, glfw.Windowed); err != nil {
log.Fatal(err)
}
if gl.Init() != 0 {
log.Fatal("ummm... hmmm")
}
glfw.SetWindowSizeCallback(resize)
gl.Enable(gl.TEXTURE_2D)
resize(w, h)
v.Texture = gl.GenTexture()
}
func main() {
glfw.SetErrorCallback(errorCallback)
if !glfw.Init() {
panic("Can't init glfw!")
}
defer glfw.Terminate()
window, err := glfw.CreateWindow(Width, Height, Title, nil, nil)
if err != nil {
panic(err)
}
window.MakeContextCurrent()
glfw.SwapInterval(1)
gl.Init()
if err := initScene(); err != nil {
fmt.Fprintf(os.Stderr, "init: %s\n", err)
return
}
defer destroyScene()
for !window.ShouldClose() {
drawScene()
window.SwapBuffers()
glfw.PollEvents()
}
}
// Opens a new window.
func (c *Controller) Open(win *Window) (err error) {
c.Win = win
mode := glfw.Windowed
if win.Fullscreen {
mode = glfw.Fullscreen
}
if win.Resize == false {
glfw.OpenWindowHint(glfw.WindowNoResize, 1)
}
if err = glfw.OpenWindow(win.Width, win.Height, 0, 0, 0, 0, 0, 0, mode); err != nil {
return
}
gl.Init()
gl.Enable(gl.TEXTURE_2D)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
v1, v2, v3 := glfw.GLVersion()
log.Printf("OpenGL version: %v %v %v\n", v1, v2, v3)
fb_supported := glfw.ExtensionSupported("GL_EXT_framebuffer_object")
log.Printf("Framebuffer supported: %v\n", fb_supported)
c.SetClearColor(0, 0, 0, 0)
if win.VSync == true {
glfw.SetSwapInterval(1) // Limit to refresh
}
glfw.SetWindowTitle(win.Title)
glfw.SetWindowSizeCallback(func(w, h int) {
log.Printf("Resizing window to %v, %v\n", w, h)
c.resize()
})
err = c.resize()
return
}
// initGL initializes GLFW and OpenGL.
func initGL() error {
err := glfw.Init()
if err != nil {
return err
}
glfw.OpenWindowHint(glfw.FsaaSamples, 4)
err = glfw.OpenWindow(512, 512, 8, 8, 8, 8, 0, 0, glfw.Windowed)
if err != nil {
glfw.Terminate()
return err
}
glfw.SetWindowTitle("Meshbuffer 2D example")
glfw.SetSwapInterval(1)
glfw.SetWindowSizeCallback(onResize)
glfw.SetKeyCallback(onKey)
gl.Init()
if err = glh.CheckGLError(); err != nil {
return err
}
gl.Disable(gl.DEPTH_TEST)
gl.Enable(gl.MULTISAMPLE)
gl.Disable(gl.LIGHTING)
gl.Enable(gl.COLOR_MATERIAL)
gl.ClearColor(0.2, 0.2, 0.23, 1.0)
return nil
}
// initGL initializes GLFW and OpenGL.
func initGL() error {
err := glfw.Init()
if err != nil {
return err
}
err = glfw.OpenWindow(640, 480, 8, 8, 8, 8, 0, 0, glfw.Windowed)
if err != nil {
glfw.Terminate()
return err
}
glfw.SetWindowTitle("go-gl/gltext: Bitmap font example")
glfw.SetSwapInterval(1)
glfw.SetWindowSizeCallback(onResize)
glfw.SetKeyCallback(onKey)
errno := gl.Init()
if errno != gl.NO_ERROR {
str, err := glu.ErrorString(errno)
if err != nil {
return fmt.Errorf("Unknown openGL error: %d", errno)
}
return fmt.Errorf(str)
}
gl.Disable(gl.DEPTH_TEST)
gl.Disable(gl.LIGHTING)
gl.ClearColor(0.2, 0.2, 0.23, 0.0)
return nil
}
// NewRenderer creates a new Renderer with the given window size and title.
func NewRenderer(window *Window) (*Renderer, error) {
logger.Debug("Initializing GLEW")
// Init glew
if gl.Init() != 0 {
return nil, errors.New("Could not initialise glew.")
}
gl.GetError()
if window.Settings.ClearColor != nil {
color := window.Settings.ClearColor
gl.ClearColor(
gl.GLclampf(color.R()),
gl.GLclampf(color.G()),
gl.GLclampf(color.B()),
0.,
)
}
gl.Enable(gl.DEPTH_TEST)
gl.DepthFunc(gl.LESS)
gl.Enable(gl.CULL_FACE)
// Vertex buffers
vertexArray := gl.GenVertexArray()
vertexArray.Bind()
renderer := Renderer{
vertexArray: vertexArray,
window: window,
}
return &renderer, nil
}
func main() {
if err := glfw.Init(); err != nil {
fmt.Fprintf(os.Stderr, "[e] %v\n", err)
return
}
defer glfw.Terminate()
if err := glfw.OpenWindow(appWidth, appHeight, 8, 8, 8, 8, 24, 8, glfw.Windowed); err != nil {
fmt.Fprintf(os.Stderr, "[e] %v\n", err)
return
}
defer glfw.CloseWindow()
if err := gl.Init(); err != 0 {
fmt.Fprintf(os.Stderr, "[e] %v\n", err)
return
}
glfw.SetWindowTitle(title)
fps := fps.NewFPS(glfw.Time())
blocks.Init(appWidth, appHeight)
for glfw.WindowParam(glfw.Opened) == 1 {
blocks.Tick()
fps.Tick(glfw.Time())
if glfw.WindowParam(glfw.Active) == 1 {
glfw.Sleep(0.001)
} else {
glfw.Sleep(0.05)
}
}
}
func make_window(w, h int, title string) func() {
// Required to make sure that the OpenGL go-routine doesn't get switched
// to another thread (=> kerblammo)
runtime.LockOSThread()
if err := glfw.Init(); err != nil {
log.Panic("glfw Error:", err)
}
err := glfw.OpenWindow(w, h, 0, 0, 0, 0, 0, 0, glfw.Windowed)
if err != nil {
log.Panic("Error:", err)
}
if gl.Init() != 0 {
log.Panic("gl error")
}
if *vsync {
glfw.SetSwapInterval(1)
} else {
glfw.SetSwapInterval(0)
}
glfw.SetWindowTitle(title)
glfw.SetWindowSizeCallback(Reshape)
Init()
return func() {
glfw.Terminate()
glfw.CloseWindow()
log.Print("Cleanup")
}
}
func main() {
runtime.LockOSThread()
if !glfw.Init() {
fmt.Fprintf(os.Stderr, "Can't open GLFW")
return
}
defer glfw.Terminate()
glfw.WindowHint(glfw.Samples, 4)
glfw.WindowHint(glfw.ContextVersionMajor, 3)
glfw.WindowHint(glfw.ContextVersionMinor, 3)
glfw.WindowHint(glfw.OpenglProfile, glfw.OpenglCoreProfile)
glfw.WindowHint(glfw.OpenglForwardCompatible, glfw.True) // needed for macs
window, err := glfw.CreateWindow(1024, 768, "Tutorial 1", nil, nil)
if err != nil {
fmt.Fprintf(os.Stderr, "%v\n", err)
return
}
window.MakeContextCurrent()
gl.Init()
gl.GetError() // Ignore error
window.SetInputMode(glfw.StickyKeys, 1)
gl.ClearColor(0., 0., 0.4, 0.)
// Equivalent to a do... while
for ok := true; ok; ok = (window.GetKey(glfw.KeyEscape) != glfw.Press && !window.ShouldClose()) {
window.SwapBuffers()
glfw.PollEvents()
}
}
func RunIn3DContext(example func()) {
if !glfw.Init() {
log.Panic("glfw Error")
}
defer glfw.Terminate()
glfw.WindowHint(glfw.ContextVersionMajor, 3)
glfw.WindowHint(glfw.ContextVersionMinor, 3)
glfw.WindowHint(glfw.OpenglForwardCompatible, glfw.True)
glfw.WindowHint(glfw.OpenglProfile, glfw.OpenglCoreProfile)
w, h := 100, 100
window, err := glfw.CreateWindow(w, h, "Test", nil, nil)
if err != nil {
log.Panic(err)
}
window.MakeContextCurrent()
if gl.Init() != 0 {
log.Panic("gl error")
}
gl.GetError()
vertexArray := gl.GenVertexArray()
vertexArray.Bind()
example()
}
func init() {
go func() {
runtime.LockOSThread()
if err := glfw.Init(); err != nil {
log.Panic("glfw Error:", err)
}
w, h := 100, 100
err := glfw.OpenWindow(w, h, 0, 0, 0, 0, 0, 0, glfw.Windowed)
if err != nil {
log.Panic("Error:", err)
}
if gl.Init() != 0 {
log.Panic("gl error")
}
glfw.SetWindowSizeCallback(Reshape)
glfw.SwapBuffers()
for {
(<-main_thread_setup)()
glfw.SwapBuffers()
(<-main_thread_after)()
main_thread_work_done <- true
}
}()
}
// initGL initializes GLFW and OpenGL.
func initGL(c *cpu.CPU, width, height int) error {
err := glfw.Init()
if err != nil {
return err
}
glfw.OpenWindowHint(glfw.WindowNoResize, 1)
err = glfw.OpenWindow(width, height, 8, 8, 8, 8, 8, 0, glfw.Windowed)
if err != nil {
glfw.Terminate()
return err
}
glfw.SetWindowTitle("DCPU")
glfw.SetSwapInterval(1)
glfw.SetWindowSizeCallback(onResize)
gl.Init()
err = glh.CheckGLError()
if err != nil {
return err
}
gl.Disable(gl.LIGHTING)
gl.Disable(gl.DEPTH_TEST)
gl.Enable(gl.TEXTURE_2D)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.ClearColor(0, 0, 0, 1)
return err
}
func main() {
if !glfw.Init() {
log.Fatal("glfw failed to initialize")
}
defer glfw.Terminate()
window, err := glfw.CreateWindow(640, 480, "Deformable", nil, nil)
if err != nil {
log.Fatal(err.Error())
}
window.MakeContextCurrent()
glfw.SwapInterval(1)
window.SetMouseButtonCallback(handleMouseButton)
window.SetKeyCallback(handleKeyDown)
window.SetInputMode(glfw.Cursor, glfw.CursorHidden)
gl.Init()
initGL()
i := 16
m = GenerateMap(1600/i, 1200/i, i)
for running && !window.ShouldClose() {
x, y := window.GetCursorPosition()
if drawing != 0 {
m.Add(int(x)+int(camera[0]), int(y)+int(camera[1]), drawing, brushSizes[currentBrushSize])
}
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.LoadIdentity()
gl.PushMatrix()
gl.PushAttrib(gl.CURRENT_BIT | gl.ENABLE_BIT | gl.LIGHTING_BIT | gl.POLYGON_BIT | gl.LINE_BIT)
gl.Translatef(-camera[0], -camera[1], 0)
m.Draw()
gl.PopAttrib()
gl.PopMatrix()
gl.PushAttrib(gl.COLOR_BUFFER_BIT)
gl.LineWidth(2)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.ONE_MINUS_DST_COLOR, gl.ZERO)
// gl.Enable(gl.LINE_SMOOTH)
// gl.Hint(gl.LINE_SMOOTH_HINT, gl.NICEST)
gl.Translatef(float32(x), float32(y), 0)
gl.EnableClientState(gl.VERTEX_ARRAY)
gl.VertexPointer(2, gl.DOUBLE, 0, cursorVerts)
gl.DrawArrays(gl.LINE_LOOP, 0, 24)
gl.PopAttrib()
window.SwapBuffers()
glfw.PollEvents()
}
}
func main() {
glfw.SetErrorCallback(errorCallback)
if !glfw.Init() {
panic("Can't init glfw!")
}
defer glfw.Terminate()
window, err := glfw.CreateWindow(800, 640, "MyGui", nil, nil)
if err != nil {
panic(err)
}
window.MakeContextCurrent()
glfw.SwapInterval(1)
gl.Init()
mvp := prepareModelViewProjection(800, 640)
prepareScene()
dt := float64(0)
glfw.SetTime(dt)
for !window.ShouldClose() {
dt = glfw.GetTime()
glfw.SetTime(0)
updateScene(dt)
drawScene(mvp, dt)
window.SwapBuffers()
glfw.PollEvents()
}
}
func glthread(glctx Context, cmds <-chan func()) {
glctx.Lock()
defer glctx.Unlock()
gl.Init()
for cmd := range cmds {
cmd()
}
}
func main() {
if err := glfw.Init(); err != nil {
fmt.Fprintf(os.Stderr, "%s\n", err.Error())
return
}
defer glfw.Terminate()
glfw.OpenWindowHint(glfw.FsaaSamples, 4)
glfw.OpenWindowHint(glfw.OpenGLVersionMajor, 3)
glfw.OpenWindowHint(glfw.OpenGLVersionMinor, 3)
glfw.OpenWindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
if err := glfw.OpenWindow(1024, 768, 0, 0, 0, 0, 32, 0, glfw.Windowed); err != nil {
fmt.Fprintf(os.Stderr, "%s\n", err.Error())
return
}
gl.Init() // Can't find gl.GLEW_OK or any variation, not sure how to check if this worked
gl.GetError() // Ignore error
glfw.SetWindowTitle("Tutorial 02")
glfw.Enable(glfw.StickyKeys)
gl.ClearColor(0., 0., 0.4, 0.)
prog := helper.MakeProgram("SimpleVertexShader.vertexshader", "SimpleFragmentShader.fragmentshader")
vBufferData := [...]float32{
-1., -1., 0.,
1., -1., 0.,
0., 1., 0.}
vertexArray := gl.GenVertexArray()
vertexArray.Bind()
buffer := gl.GenBuffer()
buffer.Bind(gl.ARRAY_BUFFER)
gl.BufferData(gl.ARRAY_BUFFER, len(vBufferData)*4, &vBufferData, gl.STATIC_DRAW)
// Equivalent to a do... while
for ok := true; ok; ok = (glfw.Key(glfw.KeyEsc) != glfw.KeyPress && glfw.WindowParam(glfw.Opened) == gl.TRUE) {
gl.Clear(gl.COLOR_BUFFER_BIT)
prog.Use()
attribLoc := gl.AttribLocation(0)
attribLoc.EnableArray()
buffer.Bind(gl.ARRAY_BUFFER)
attribLoc.AttribPointer(3, gl.FLOAT, false, 0, nil)
gl.DrawArrays(gl.TRIANGLES, 0, 3)
attribLoc.DisableArray()
glfw.SwapBuffers()
}
}
func main() {
_ = fmt.Sprint()
if !glfw.Init() {
panic("Can't init glfw!")
}
defer glfw.Terminate()
// antialiasing
//glfw.WindowHint(glfw.Samples, 4)
window, err = glfw.CreateWindow(WindowWidth, WindowHeight, "Mozaik", nil, nil)
if err != nil {
panic(err)
}
defer window.Destroy()
// Ensure thread context
window.MakeContextCurrent()
//glfw.SwapInterval(1)
window.SetKeyCallback(keyCb)
window.SetMouseButtonCallback(mouseCb)
gl.Init()
gl.ClearColor(0.9, 0.85, 0.46, 0.0)
// useless in 2D
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)
for i := int32(32); i < 72; i++ {
font := loadFonts(i)
defer font.Release()
fonts = append(fonts, font)
}
// Compute window radius
windowRadius = math.Sqrt(math.Pow(WindowHeight, 2) + math.Pow(WindowWidth, 2))
// Use window coordinates
gl.MatrixMode(gl.PROJECTION)
gl.LoadIdentity()
gl.Ortho(0, WindowWidth, WindowHeight, 0, 0, 1)
gl.MatrixMode(gl.MODELVIEW)
gl.LoadIdentity()
g = NewGame()
g.Start()
go eventLoop(g)
go renderLoop(g)
Main()
g.Stop()
}
func (self *OpenGLWindow) Open() {
var err error
if !glfw.Init() {
panic(errors.New("Unable to initialize GLFW"))
}
glfw.SetErrorCallback(func(code glfw.ErrorCode, desc string) {
log.Printf("[GLFW Error] (%d) %s", code, desc)
})
var monitor *glfw.Monitor
if self.config.Fullscreen {
monitor, err = glfw.GetPrimaryMonitor()
if err != nil {
panic(err)
}
}
glfw.WindowHint(glfw.ContextVersionMajor, 4)
glfw.WindowHint(glfw.ContextVersionMinor, 1)
glfw.WindowHint(glfw.OpenglProfile, glfw.OpenglCoreProfile)
glfw.WindowHint(glfw.OpenglForwardCompatible, glfw.True)
// Default buffer sizes
glfw.WindowHint(glfw.DepthBits, 32)
glfw.WindowHint(glfw.StencilBits, 0)
// Toggle VSync. Turning VSync off aparently doesn't work via glfw through
// some ATI cards and drivers
if self.config.VSync {
glfw.SwapInterval(1)
} else {
glfw.SwapInterval(0)
}
self.window, err = glfw.CreateWindow(
int(self.config.Width), int(self.config.Height),
"Project Slartibartfast",
monitor,
nil)
if err != nil {
panic(err)
}
self.window.MakeContextCurrent()
if glewError := gl.Init(); glewError != 0 {
panic(errors.New("Unable to initialize OpenGL"))
}
}
func initGL() error {
gl.Init()
if err := glh.CheckGLError(); err != nil {
return err
}
gl.Disable(gl.DEPTH_TEST)
gl.Enable(gl.MULTISAMPLE)
gl.Disable(gl.LIGHTING)
gl.Enable(gl.COLOR_MATERIAL)
gl.ClearColor(0, 0, 0, 1)
return nil
}
func initGL() (err error) {
gl.Init()
gl.ShadeModel(gl.SMOOTH)
gl.ClearColor(0, 0, 0, 0)
gl.ClearDepth(1)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Hint(gl.PERSPECTIVE_CORRECTION_HINT, gl.NICEST)
gl.DepthFunc(gl.NEVER)
gl.Enable(gl.BLEND)
gl.DepthMask(true)
//loadShader()
return
}
func (s *System) CreateWindow(width, height int, title string) {
if err := glfw.OpenWindow(width, height, 0, 0, 0, 8, 32, 0, glfw.Windowed); err != nil {
fmt.Fprintf(os.Stderr, "%s\n", err.Error())
return
}
gl.Init() // Can't find gl.GLEW_OK or any variation, not sure how to check if this worked
CheckGLErrors() // Ignore error
glfw.SetWindowTitle(title)
glfw.Enable(glfw.StickyKeys)
gl.ClearColor(0., 0., 0., 0.)
gl.Clear(gl.COLOR_BUFFER_BIT)
}
func (v *Video) Init(t <-chan []uint32, ft chan bool, n string) chan [2]int {
v.tick = t
v.frametick = ft
v.resize = make(chan [2]int)
if sdl.Init(sdl.INIT_VIDEO|sdl.INIT_JOYSTICK|sdl.INIT_AUDIO) != 0 {
log.Fatal(sdl.GetError())
}
v.screen = sdl.SetVideoMode(512, 480, 32, sdl.OPENGL|sdl.RESIZABLE)
if v.screen == nil {
log.Fatal(sdl.GetError())
}
sdl.WM_SetCaption(fmt.Sprintf("Fergulator - %s", n), "")
if gl.Init() != 0 {
panic(sdl.GetError())
}
gl.Enable(gl.TEXTURE_2D)
v.Reshape(int(v.screen.W), int(v.screen.H))
v.tex = gl.GenTexture()
joy = make([]*sdl.Joystick, sdl.NumJoysticks())
for i := 0; i < sdl.NumJoysticks(); i++ {
joy[i] = sdl.JoystickOpen(i)
fmt.Println("-----------------")
if joy[i] != nil {
fmt.Printf("Joystick %d\n", i)
fmt.Println(" Name: ", sdl.JoystickName(0))
fmt.Println(" Number of Axes: ", joy[i].NumAxes())
fmt.Println(" Number of Buttons: ", joy[i].NumButtons())
fmt.Println(" Number of Balls: ", joy[i].NumBalls())
} else {
fmt.Println(" Couldn't open Joystick!")
}
}
return v.resize
}
func initWindow() (window *glfw.Window, err error) {
monitor, err := glfw.GetPrimaryMonitor()
if err != nil {
return nil, err
}
videomode, err := monitor.GetVideoMode()
if err != nil {
return nil, err
}
if videomode.Height < 480 || videomode.Width < 640 {
return nil, errors.New("unsupported resolution!")
}
ratio := float64(videomode.Width) / float64(videomode.Height)
if fullscreen {
glfw.WindowHint(glfw.Decorated, 0)
window, err = glfw.CreateWindow(videomode.Width, videomode.Height, "Golang Asteroids!", nil, nil)
if err != nil {
return nil, err
}
window.SetPosition(0, 0)
} else {
glfw.WindowHint(glfw.Decorated, 1)
window, err = glfw.CreateWindow(int(ratio*480), 480, "Golang Asteroids!", nil, nil)
if err != nil {
return nil, err
}
window.SetPosition(videomode.Width/2-320, videomode.Height/2-240)
}
window.SetKeyCallback(keyCallback)
window.SetFramebufferSizeCallback(reshapeWindow)
window.MakeContextCurrent()
gl.Init()
gl.ClearColor(gl.GLclampf(Colorize(0)), gl.GLclampf(Colorize(0)), gl.GLclampf(Colorize(0)), 0.0)
gl.Clear(gl.COLOR_BUFFER_BIT)
width, height := window.GetFramebufferSize()
reshapeWindow(window, width, height)
return window, nil
}
func main() {
runtime.LockOSThread()
glfw.SetErrorCallback(errorCallback)
if !glfw.Init() {
panic("Can't init glfw!")
}
defer glfw.Terminate()
// must be done in main thread or we get a nasty stderr message from glfw,
// although it does seem to 'work'
window, err := glfw.CreateWindow(Width, Height, Title, nil, nil)
if err != nil {
panic(err)
}
// separate thread for drawing so that we don't block on the event thread.
// most obvious benefit is that we continue to render during window
// resizes.
go func() {
runtime.LockOSThread()
window.MakeContextCurrent()
glfw.SwapInterval(1)
gl.Init()
if err := initScene(); err != nil {
fmt.Fprintf(os.Stderr, "init: %s\n", err)
return
}
for !window.ShouldClose() {
drawScene()
window.SwapBuffers()
}
os.Exit(0)
}()
for {
glfw.WaitEvents()
}
}
func main() {
if !glfw.Init() {
f.Println("Failed to init glfw")
panic("Cannot initialize glfw library")
}
defer glfw.Terminate()
//glfw.WindowHint(glfw.DepthBits, 16)
window, err := glfw.CreateWindow(300, 300, "Wander", nil, nil)
if err != nil {
panic(err)
}
window.SetFramebufferSizeCallback(reshape)
window.SetKeyCallback(key)
window.MakeContextCurrent()
glfw.SwapInterval(1)
width, height := window.GetFramebufferSize()
reshape(window, width, height)
if gl.Init() != 0 {
panic("Failed to init GL")
}
prog := setupProgram()
defer prog.Delete()
prog.Use()
attr = prog.GetAttribLocation("offset")
setup()
for !window.ShouldClose() {
if shouldRender() {
draw()
}
animate()
window.SwapBuffers()
glfw.PollEvents()
}
}
// initGL initializes GLFW and OpenGL.
func initGL() (*glfw.Window, error) {
if !glfw.Init() {
log.Panic("glfw Error:")
}
var err error
window, err = glfw.CreateWindow(768, 768, "My Own Shadertoy", nil, nil)
if err != nil {
glfw.Terminate()
return nil, err
}
window.MakeContextCurrent()
window.SetSizeCallback(onResize)
window.SetKeyCallback(onKey)
window.SetMouseButtonCallback(onMouse)
window.SetCursorPositionCallback(onCursor)
errno := gl.Init()
if errno != gl.NO_ERROR {
str, err := glu.ErrorString(errno)
if err != nil {
return nil, fmt.Errorf("Unknown openGL error: %d", errno)
}
return nil, fmt.Errorf(str)
}
gl.Enable(gl.TEXTURE_1D)
gl.Enable(gl.TEXTURE_2D)
gl.Enable(gl.TEXTURE_3D)
fmt.Printf("gl.RENDERER = %s\n", gl.GetString(gl.RENDERER))
fmt.Printf("gl.VERSION = %s\n", gl.GetString(gl.VERSION))
fmt.Printf("gl.VENDOR = %s\n", gl.GetString(gl.VENDOR))
fmt.Printf("gl.EXTENSIONS = %s\n", gl.GetString(gl.EXTENSIONS))
return window, nil
}
// initGL initializes GLFW and OpenGL.
func initGL() error {
err := glfw.Init()
if err != nil {
return err
}
glfw.OpenWindowHint(glfw.FsaaSamples, 4)
glfw.OpenWindowHint(glfw.WindowNoResize, gl.TRUE)
err = glfw.OpenWindow(512, 512, 8, 8, 8, 8, 32, 0, glfw.Windowed)
if err != nil {
glfw.Terminate()
return err
}
glfw.SetWindowTitle("Meshbuffer 3D example")
glfw.SetSwapInterval(1)
glfw.SetWindowSizeCallback(onResize)
glfw.SetKeyCallback(onKey)
gl.Init()
if err = glh.CheckGLError(); err != nil {
return err
}
gl.Enable(gl.DEPTH_TEST)
gl.Enable(gl.MULTISAMPLE)
gl.Disable(gl.LIGHTING)
//gl.ClearColor(0.2, 0.2, 0.23, 1.0)
gl.ClearColor(0, 0, 0, 1.0)
gl.ShadeModel(gl.SMOOTH)
gl.LineWidth(2)
gl.ClearDepth(1)
gl.DepthFunc(gl.LEQUAL)
gl.Hint(gl.PERSPECTIVE_CORRECTION_HINT, gl.NICEST)
gl.ColorMaterial(gl.FRONT_AND_BACK, gl.AMBIENT_AND_DIFFUSE)
return nil
}