func glInit() {
var err error
StartTime = time.Now().UnixNano()
if err = gl.Init(); err != nil {
panic(err)
}
gl.ClearColor(1, 0, 0, 1)
}
func main() {
initialWidth, initialHeight := 1280, 720
runtime.LockOSThread()
if sdlInit := sdl.Init(sdl.INIT_VIDEO); sdlInit != 0 {
panic("SDL init error")
}
reinitScreen(initialWidth, initialHeight)
defer cleanExit(true, false)
if err := gl.Init(); err != nil {
panic(err)
}
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Enable(gl.DEPTH)
defer cleanExit(false, true)
glSetupShaderProg(&shaderTextureCreator, false)
glSetupShaderProg(&shaderTextureDisplay, true)
glFillBuffer(rttVerts, &rttVertBuf)
glFillBuffer(dispVerts, &dispVertBuf)
gl.GenTextures(1, &rttFrameTex)
gl.BindTexture(gl.TEXTURE_2D, rttFrameTex)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
if doRtt {
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, texSize, texSize, 0, gl.RGBA, gl.UNSIGNED_BYTE, nil)
gl.GenFramebuffers(1, &rttFrameBuf)
gl.BindFramebuffer(gl.FRAMEBUFFER, rttFrameBuf)
gl.FramebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, rttFrameTex, 0)
gl.BindFramebuffer(gl.FRAMEBUFFER, 0)
} else {
glFillTextureFromImageFile("texture.jpg")
}
gl.BindTexture(gl.TEXTURE_2D, 0)
gl.ClearColor(0.3, 0.6, 0.9, 1)
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.ActiveTexture(gl.TEXTURE0)
for {
if evt := sdl.PollEvent(); evt != nil {
switch event := evt.(type) {
case *sdl.ResizeEvent:
reinitScreen(int(event.W), int(event.H))
case *sdl.QuitEvent:
return
}
} else {
if doRtt {
renderToTexture()
}
renderToScreen()
sdl.GL_SwapBuffers()
}
}
sdl.Quit()
}
func Initialize() {
fmt.Println("INFO: OpenGL Version", gl.GetString(gl.VERSION))
// Render things which are closer on top.
gl.Init()
gl.Enable(gl.DEPTH_TEST)
gl.ClearColor(0.0, 0.0, 0.0, 0.0)
CreateShaders()
CreateVOB()
}
func main() {
// Setup the window
if err := glfw.Init(); err != nil {
fmt.Fprintf(os.Stderr, "glfw: %s\n", err)
return
}
// Close glfw at the end of main()
defer glfw.Terminate()
// Set window properties
glfw.OpenWindowHint(glfw.WindowNoResize, 0)
//glfw.OpenWindowHint(glfw.OpenGLForwardCompat, gl.TRUE)
glfw.OpenWindowHint(glfw.OpenGLDebugContext, gl.TRUE)
// Actually open the window
if err := glfw.OpenWindow(initial_width, initial_height, 0, 0, 0, 0, 16, 0, glfw.Windowed); err != nil {
fmt.Fprintf(os.Stderr, "glfw: %s\n", err)
return
}
// Close the window at the end of main()
defer glfw.CloseWindow()
// Only swap buffer once/ draw cycle (30 or 60 fps)
glfw.SetSwapInterval(1)
glfw.SetWindowTitle(Title)
// Apply those settings
if err := gl.Init(); err != nil {
fmt.Fprintf(os.Stderr, "gl: %s\n", err)
}
// While glfw.Opened is 1 (the window is open), keep swapping buffers
for glfw.WindowParam(glfw.Opened) == 1 {
glfw.SwapBuffers()
}
setCallbacks()
// Initialize the openGL settings
Initialize()
}
func initGL() {
if err := gl.Init(); err != nil {
log.Fatalf("gl: %s\n", err)
}
}
func main() {
var now = time.Now()
initialWidth, initialHeight := 1280, 720
runtime.LockOSThread()
if sdlInit := sdl.Init(sdl.INIT_VIDEO); sdlInit != 0 {
panic("SDL init error")
}
reinitScreen(initialWidth, initialHeight)
defer cleanExit(true, false)
if err := gl.Init(); err != nil {
panic(err)
}
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Enable(gl.DEPTH)
sdl.WM_SetCaption("Loading volume...", "")
loadVolume()
defer cleanExit(false, true)
sdl.WM_SetCaption("Compiling shaders...", "")
glSetupShaderProg(&shaderTextureCreator)
glSetupShaderProg(&shaderTextureDisplay)
glFillBuffer(rttVerts, &rttVertBuf)
glFillBuffer(dispVerts, &dispVertBuf)
gl.GenTextures(1, &rttFrameTex)
gl.BindTexture(gl.TEXTURE_2D, rttFrameTex)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, glTexFilter)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, glTexFilter)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, glTexClamp)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, glTexClamp)
if doRtt && !noRtt {
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, texWidth, texHeight, 0, gl.RGBA, gl.UNSIGNED_BYTE, nil)
gl.GenFramebuffers(1, &rttFrameBuf)
gl.BindFramebuffer(gl.FRAMEBUFFER, rttFrameBuf)
gl.FramebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, rttFrameTex, 0)
gl.BindFramebuffer(gl.FRAMEBUFFER, 0)
} else {
if noRtt {
rttFrameBuf = 0
} else {
glFillTextureFromImageFile("texture.jpg")
}
}
gl.BindTexture(gl.TEXTURE_2D, 0)
gl.ClearColor(0.3, 0.2, 0.1, 1)
gl.Clear(gl.COLOR_BUFFER_BIT)
var looping = true
var fps = 0
var durSec time.Duration
startTime, lastLoopTime, lastSecond = now, now, now
sdl.WM_SetCaption("Up & running!", "")
for looping {
now = time.Now()
if durSec = now.Sub(lastSecond); durSec.Seconds() >= 1 {
sdl.WM_SetCaption(fmt.Sprintf("%v×%v @ %vfps", sdlScreen.W, sdlScreen.H, fps), "")
fps = 0
lastSecond = now
} else {
fps++
}
if evt := sdl.PollEvent(); evt != nil {
switch event := evt.(type) {
case *sdl.ResizeEvent:
reinitScreen(int(event.W), int(event.H))
case *sdl.QuitEvent:
looping = false
}
}
if doRtt || noRtt {
renderToTexture()
}
if !noRtt {
renderToScreen()
}
sdl.GL_SwapBuffers()
lastLoopTime = now
}
sdl.Quit()
}