func main() {
// We need to lock the goroutine to one thread due time.Ticker
runtime.LockOSThread()
var err os.Error
err = glfw.Init()
if err != nil {
fmt.Printf("GLFW: %s\n", err)
return
}
defer glfw.Terminate()
// You could probably change the required versions down
glfw.OpenWindowHint(glfw.OpenGLVersionMajor, 3)
glfw.OpenWindowHint(glfw.OpenGLVersionMinor, 3)
glfw.OpenWindowHint(glfw.OpenGLProfile, 1)
// Open Window with 8 bit Alpha
err = glfw.OpenWindow(ScreenWidth, ScreenHeight, 0, 0, 0, 8, 0, 0, glfw.Windowed)
if err != nil {
fmt.Printf("GLFW: %s\n", err)
return
}
defer glfw.CloseWindow()
glfw.SetWindowTitle(WindowTitle)
major, minor, rev := glfw.GLVersion()
if major < 3 {
fmt.Printf("Error your graphic card does not support OpenGL 3.3\n Your GL-Version is: %d, %d, %d\n", major, minor, rev)
fmt.Println("You can try to lower the settings in glfw.OpenWindowHint(glfw.OpenGLVersionMajor/Minor.")
}
initStatus := gl.Init() // Init glew
if initStatus != 0 {
fmt.Printf("Error-code: %d Init-Status: %d\n", gl.GetError(), initStatus)
}
// Enable transparency in OpenGL
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
initResources()
// We are limiting the calls to display() (frames per second) to 60. This prevents the 100% cpu usage.
ticker := time.NewTicker(int64(second) / 60) // max 60 fps
for {
<-ticker.C
move := float32(math.Sin(glfw.Time()))
angle := float32(glfw.Time())
matrix = math3d.MakeTranslationMatrix(move, 0.0, 0.0)
matrix = matrix.Multiply(math3d.MakeZRotationMatrix(angle)).Transposed()
display()
}
// Free resources
free()
runtime.UnlockOSThread()
}
func display() {
// Clear the background as white
gl.ClearColor(1.0, 1.0, 1.0, 1.0)
gl.Clear(gl.COLOR_BUFFER_BIT)
// Use the GLSL program
program.Use()
// Faster fade in and out than in the wikibook
curFade := math.Sin(glfw.Time())
uniformFade.Uniform1f(float32(curFade))
vboTriangle.Bind(gl.ARRAY_BUFFER)
attributeCoord2d.EnableArray()
// Describe our vertices array to OpenGL (it can't guess its format automatically)
attributeCoord2d.AttribPointerOffset(2, gl.FLOAT, false, 5*4, 0)
attributeColor.EnableArray()
attributeColor.AttribPointerOffset(3, gl.FLOAT, false, 5*4, 2*4)
// Push each element in buffer_vertices to the vertex shader
gl.DrawArrays(gl.TRIANGLES, 0, 3)
attributeCoord2d.DisableArray()
attributeColor.DisableArray()
// Display the result
glfw.SwapBuffers()
}
func main() {
var err error
if err = glfw.Init(); err != nil {
fmt.Fprintf(os.Stderr, "[e] %v\n", err)
return
}
defer glfw.Terminate()
// Open window with FSAA samples (if possible).
glfw.OpenWindowHint(glfw.FsaaSamples, 4)
if err = glfw.OpenWindow(400, 400, 0, 0, 0, 0, 0, 0, glfw.Windowed); err != nil {
fmt.Fprintf(os.Stderr, "[e] %v\n", err)
return
}
defer glfw.CloseWindow()
glfw.SetWindowTitle("Aliasing Detector")
glfw.SetSwapInterval(1)
if samples := glfw.WindowParam(glfw.FsaaSamples); samples != 0 {
fmt.Fprintf(os.Stdout, "Context reports FSAA is supported with %d samples\n", samples)
} else {
fmt.Fprintf(os.Stdout, "Context reports FSAA is unsupported\n")
}
gl.MatrixMode(gl.PROJECTION)
glu.Perspective(0, 1, 0, 1)
for glfw.WindowParam(glfw.Opened) == 1 {
time := float32(glfw.Time())
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.LoadIdentity()
gl.Translatef(0.5, 0, 0)
gl.Rotatef(time, 0, 0, 1)
gl.Enable(GL_MULTISAMPLE_ARB)
gl.Color3f(1, 1, 1)
gl.Rectf(-0.25, -0.25, 0.25, 0.25)
gl.LoadIdentity()
gl.Translatef(-0.5, 0, 0)
gl.Rotatef(time, 0, 0, 1)
gl.Disable(GL_MULTISAMPLE_ARB)
gl.Color3f(1, 1, 1)
gl.Rectf(-0.25, -0.25, 0.25, 0.25)
glfw.SwapBuffers()
}
}
func fps() {
t1 := glfw.Time()
if t1-t0 >= 1.0 {
log.Print(frameCount / (t1 - t0))
log.Print(life.Generation)
t0 = t1
frameCount = 0
} else {
frameCount++
}
}
//############################
func printFPS() {
Frames++
{
t := glfw.Time()
if t-T0 >= 5 {
seconds := (t - T0)
fps := float64(Frames) / seconds
print(Frames, " frames in ", int(seconds), " seconds = ", int(fps), " FPS\n")
T0 = t
Frames = 0
}
}
}
func keyPressListener(key int, action int) {
if !running {
return
}
if action == glfw.KeyPress {
width := appWidth
height := appHeight
switch key {
case glfw.KeyEsc:
running = false
case glfw.KeyF1:
app.release()
glfw.CloseWindow()
// Toggle fullscreen mode
fullScreen = !fullScreen
if fullScreen {
mode := glfw.DesktopMode()
aspect := float32(mode.W) / float32(mode.H)
if int(aspect*100) == 133 || int(aspect*100) == 125 { // Standard
width = 1280
height = 1024
} else if int(aspect*100) == 177 { // Widescreen 16:9
width = 1280
height = 720
} else if int(aspect*100) == 160 { // Widescreen 16:10
width = 1280
height = 800
} else { // Unknown
// Use desktop resolution
width = mode.W
height = mode.H
}
}
if !setupWindow(width, height, fullScreen) {
glfw.Terminate()
//exit( -1 );
}
app.init()
app.resize(width, height)
t0 = glfw.Time()
}
}
}
func draw() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.PushMatrix()
gl.Rotated(view_rotx, 1.0, 0.0, 0.0)
gl.Rotated(view_roty, 0.0, 1.0, 0.0)
gl.Rotated(view_rotz, 0.0, 0.0, 1.0)
gl.PushMatrix()
gl.Translated(-3.0, -2.0, 0.0)
gl.Rotated(angle, 0.0, 0.0, 1.0)
gl.CallList(gear1)
gl.PopMatrix()
gl.PushMatrix()
gl.Translated(3.1, -2.0, 0.0)
gl.Rotated(-2.0*angle-9.0, 0.0, 0.0, 1.0)
gl.CallList(gear2)
gl.PopMatrix()
gl.PushMatrix()
gl.Translated(-3.1, 4.2, 0.0)
gl.Rotated(-2.0*angle-25.0, 0.0, 0.0, 1.0)
gl.CallList(gear3)
gl.PopMatrix()
gl.PopMatrix()
glfw.SwapBuffers()
Frames++
{
t := glfw.Time()
if t-T0 >= 5 {
seconds := (t - T0)
fps := float64(Frames) / seconds
print(Frames, " frames in ", int(seconds), " seconds = ", int(fps), " FPS\n")
T0 = t
Frames = 0
}
}
}
func main() {
log.SetFlags(log.Lshortfile)
//parse flags
flag.Parse()
if flags.cpuprofile != "" {
f, err := os.Create(flags.cpuprofile)
if err != nil {
log.Fatal(err)
}
pprof.StartCPUProfile(f)
defer pprof.StopCPUProfile()
}
loadSettingsFile()
Settings.Paused = flags.startPaused
if flags.buildExamples {
allExamples()
return
}
wx, wy := 800, 600
//initialize opengl & glfw
{
//init glfw
if err := glfw.Init(); err != nil {
log.Printf("Error initializing glfw: %v\n", err)
return
}
defer glfw.Terminate()
//set window hints
glfw.OpenWindowHint(glfw.WindowNoResize, 1)
//create the window
if err := glfw.OpenWindow(wx, wy, 8, 8, 8, 8, 0, 8, glfw.Windowed); err != nil {
log.Printf("Error opening Window: %v\n", err)
return
}
defer glfw.CloseWindow()
//init opengl
if gl.Init() != 0 {
panic("gl error")
}
//glfw config
{
glfw.SetSwapInterval(1)
glfw.SetWindowTitle("mater test")
}
//set additional opengl stuff
{
gl.ClearColor(0, 0, 0, 0)
gl.Enable(gl.BLEND)
//gl.BlendFunc (gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA);
gl.Enable(gl.TEXTURE_2D)
}
}
//setup scene related stuff
{
//create empty space
space = collision.NewSpace()
}
//reload settings so they take effect
reloadSettings()
saveSettingsFile()
//set callbacks
{
glfw.SetWindowSizeCallback(OnResize)
glfw.SetKeyCallback(OnKey)
}
//init debug console
console.Init()
//load savefile passed from the commandline if any
if flags.file != "" {
err := loadSpace(flags.file)
Settings.Paused = true
if err != nil {
panic(err)
}
}
//if set to true once a second
printFPS := false
//fix timestep to given fps
const expectedFps = 30.0
const expectedFrameTime = 1.0 / expectedFps
//the time at the start of the last frame
lastTime := 0.0
acc := 0.0
updateAcc := 0.0
frameCount := 0
updateFrameCount := 0
fps := 0
updateFps := 0
Settings.Running = true
for Settings.Running && glfw.WindowParam(glfw.Opened) == 1 {
time := glfw.Time()
//get the time elapsed since the last frame
dt := time - lastTime
lastTime = time
//advance framecount and accumulators
frameCount++
acc += dt
updateAcc += dt
//execute console commands if any
select {
case command := <-console.Command:
console.ExecuteCommand(command)
default:
}
//update the scene at a fixed timestep
for updateAcc >= expectedFrameTime {
updateFrameCount++
//if one second has passed update the fps and reset the framecount
if acc > 1 {
updateFps = updateFrameCount
updateFrameCount = 0
}
//only update if not paused or if set to advance a single frame
if !Settings.Paused || Settings.SingleStep {
space.Step(expectedFrameTime)
Settings.SingleStep = false
}
updateAcc -= expectedFrameTime
}
//draw debug data
Draw()
glfw.SwapBuffers()
//if one second has passed update the fps and reset the framecount
if acc > 1 {
fps = frameCount
frameCount = 0
if printFPS {
fmt.Printf("---\n")
fmt.Printf("FPS: %v\n", fps)
fmt.Printf("Update FPS: %v\n", updateFps)
fmt.Printf("Average frametime: %v\n", acc/float64(fps))
fmt.Printf("---\n")
}
acc -= 1
}
}
}
func main() {
// Initialize GLFW
glfw.Init()
glfw.Enable(glfw.StickyKeys)
if !setupWindow(appWidth, appHeight, fullScreen) {
return
}
// Initialize application and engine
app = new(Application)
if !app.init() {
fmt.Println("Error starting Horde3d")
horde3d.DumpMessages()
}
if !fullScreen {
glfw.SetWindowTitle(app.title)
}
app.resize(appWidth, appHeight)
glfw.Disable(glfw.MouseCursor)
var frames float32 = 0
var fps float32 = 30.0
t0 = glfw.Time()
running = true
// Game loop
for running {
// Calc FPS
frames++
if frames >= 3 {
t := glfw.Time()
fps = frames / float32(t-t0)
if fps < 5 {
fps = 30 // Handle breakpoints
}
frames = 0
t0 = t
}
// Update key states
for i := 0; i < 320; i++ {
app.setKeyState(i, glfw.Key(i) == glfw.KeyPress)
}
app.keyStateHandler()
// Render
app.mainLoop(fps)
glfw.SwapBuffers()
}
glfw.Enable(glfw.MouseCursor)
// Quit
app.release()
glfw.Terminate()
return
}
func main() {
// We need to lock the goroutine to one thread due time.Ticker
runtime.LockOSThread()
var err os.Error
err = glfw.Init()
if err != nil {
fmt.Printf("GLFW: %s\n", err)
return
}
defer glfw.Terminate()
// You could probably change the required versions down
glfw.OpenWindowHint(glfw.OpenGLVersionMajor, 3)
glfw.OpenWindowHint(glfw.OpenGLVersionMinor, 3)
glfw.OpenWindowHint(glfw.OpenGLProfile, 1)
// Open Window with 8 bit Alpha
err = glfw.OpenWindow(ScreenWidth, ScreenHeight, 0, 0, 0, 8, 8, 0, glfw.Windowed)
if err != nil {
fmt.Printf("GLFW: %s\n", err)
return
}
defer glfw.CloseWindow()
glfw.SetWindowTitle(WindowTitle)
glfw.SetWindowSizeCallback(onResize)
major, minor, rev := glfw.GLVersion()
if major < 3 {
fmt.Printf("Error your graphic card does not support OpenGL 3.3\n Your GL-Version is: %d, %d, %d\n", major, minor, rev)
fmt.Println("You can try to lower the settings in glfw.OpenWindowHint(glfw.OpenGLVersionMajor/Minor.")
}
initStatus := gl.Init() // Init glew
if initStatus != 0 {
fmt.Printf("Error-code: %d Init-Status: %d\n", gl.GetError(), initStatus)
}
// Enable transparency in OpenGL
gl.Enable(gl.BLEND)
gl.Enable(gl.DEPTH_TEST)
//gl.DepthFunc(gl.LESS)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
initResources()
// We are limiting the calls to display() (frames per second) to 60. This prevents the 100% cpu usage.
ticker := time.NewTicker(int64(second) / 60) // max 60 fps
for {
<-ticker.C
angle := float32(glfw.Time())
anim := math3d.MakeYRotationMatrix(angle)
model := math3d.MakeTranslationMatrix(0, 0, -4)
view := math3d.MakeLookAtMatrix(math3d.Vector3{0, 2, 0}, math3d.Vector3{0, 0, -4}, math3d.Vector3{0, 1, 0})
projection := math3d.MakePerspectiveMatrix(45, float32(ScreenWidth)/float32(ScreenHeight), 0.1, 10.0)
matrix = math3d.MakeIdentity().Multiply(projection).Multiply(view).Multiply(model).Multiply(anim)
program.Use()
uniformMTransform.UniformMatrix4fv(1, false, matrix.Transposed())
display()
}
// Free resources
free()
runtime.UnlockOSThread()
}
func drawGrid() {
gl.Color4f(0.2, 0.2, 0.2, 1)
gl.Begin(gl.LINES)
for i := -0.5; i < Width; i += 1 {
gl.Vertex2f(gl.Float(-0.5), gl.Float(i))
gl.Vertex2f(gl.Float(life.Size), gl.Float(i))
gl.Vertex2f(gl.Float(i), -0.5)
gl.Vertex2f(gl.Float(i), gl.Float(life.Size))
}
gl.End()
}
var frameCount float64
var t0 = glfw.Time()
func fps() {
t1 := glfw.Time()
if t1-t0 >= 1.0 {
log.Print(frameCount / (t1 - t0))
log.Print(life.Generation)
t0 = t1
frameCount = 0
} else {
frameCount++
}
}
func drawScene() {
fps()