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")
}
}
// 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 RunGame(title string, width, height int, init, draw func()) {
if err := glfw.Init(); err != nil {
fmt.Fprintf(os.Stderr, "glfw: %s\n", err)
return
}
defer glfw.Terminate()
glfw.OpenWindowHint(glfw.WindowNoResize, 1)
if err := glfw.OpenWindow(width, height, 0, 0, 0, 0, 16, 0, glfw.Windowed); err != nil {
fmt.Fprintf(os.Stderr, "glfw: %s\n", err)
return
}
defer glfw.CloseWindow()
glfw.SetSwapInterval(1)
glfw.SetWindowTitle(title)
if err := gl.Init(); err != nil {
fmt.Fprintf(os.Stderr, "gl: %s\n", err)
}
if err := initScene(width, height, init); err != nil {
fmt.Fprintf(os.Stderr, "init: %s\n", err)
return
}
// defer destroyScene()
for glfw.WindowParam(glfw.Opened) == 1 {
drawScene(draw)
glfw.SwapBuffers()
}
}
// 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
}
func main() {
var err error
if err = glfw.Init(); err != nil {
log.Fatalf("%v\n", err)
return
}
defer glfw.Terminate()
if err = glfw.OpenWindow(640, 480, 8, 8, 8, 8, 0, 0, glfw.Windowed); err != nil {
log.Fatalf("%v\n", err)
return
}
defer glfw.CloseWindow()
glfw.SetWindowTitle("Draw")
glfw.SetSwapInterval(1)
glfw.SetKeyCallback(onKey)
glfw.SetMouseButtonCallback(onMouseBtn)
glfw.SetWindowSizeCallback(onResize)
running = true
for running && glfw.WindowParam(glfw.Opened) == 1 {
if mouse[0] != 0 {
pen.lineTo(glfw.MousePos())
} else {
pen.moveTo(glfw.MousePos())
}
glfw.SwapBuffers()
}
}
func main() {
var err error
if err = glfw.Init(); err != nil { ///初始化环境
log.Fatalf("%v\n", err)
return
}
defer glfw.Terminate() /// 销毁环境
if err = glfw.OpenWindow(Width, Height, 8, 8, 8, 8, 0, 8, glfw.Windowed); err != nil { ///创建窗口
log.Fatalf("%v\n", err)
return
}
defer glfw.CloseWindow() /// 销毁窗口
glfw.SetSwapInterval(1)
glfw.SetWindowTitle(Title) ///设置标题
glfw.SetWindowSizeCallback(onResize) /// 回调窗口变化
glfw.SetKeyCallback(onKey) ///回调按键
initGL()
running = true
for running && glfw.WindowParam(glfw.Opened) == 1 {
drawScene()
}
}
// 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
}
// 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
}
func main() {
var err error
if err = glfw.Init(); err != nil {
log.Fatalf("%v\n", err)
return
}
defer glfw.Terminate()
if err = glfw.OpenWindow(Width, Height, 8, 8, 8, 8, 0, 8, glfw.Windowed); err != nil {
log.Fatalf("%v\n", err)
return
}
defer glfw.CloseWindow()
glfw.SetSwapInterval(1)
glfw.SetWindowTitle(Title)
glfw.SetWindowSizeCallback(onResize)
glfw.SetKeyCallback(onKey)
if err = initGL(); err != nil {
log.Fatalf("%v\n", err)
return
}
defer destroyGL()
running = true
for running && glfw.WindowParam(glfw.Opened) == 1 {
drawScene()
}
}
func Init() {
runtime.LockOSThread()
// Initialize GLFW
var err error
if err = glfw.Init(); err != nil {
log.Fatalf("%v\n", err)
return
}
err = glfw.OpenWindow(SCREEN_WIDTH, SCREEN_HEIGHT,
0, 0, 0, 0, 0, 0, glfw.Windowed)
if err != nil {
log.Fatalf("%v\n", err)
return
}
glfw.SetWindowTitle("Mandelbrot")
glfw.SetSwapInterval(1)
glfw.SetWindowSizeCallback(onResize)
glfw.SetWindowCloseCallback(onClose)
glfw.SetMouseButtonCallback(onMouseBtn)
glfw.SetMouseWheelCallback(onMouseWheel)
glfw.SetKeyCallback(onKey)
glfw.SetCharCallback(onChar)
// Initialize OpenGL
gl.Disable(gl.DEPTH_TEST)
gl.ClearColor(0, 0, 0, 0)
}
// 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
}
func StartEngine() {
runtime.GOMAXPROCS(runtime.NumCPU())
runtime.LockOSThread()
fmt.Println("Enginge started!")
var err error
if err = glfw.Init(); err != nil {
panic(err)
}
fmt.Println("GLFW Initialized!")
glfw.OpenWindowHint(glfw.Accelerated, 1)
if err = glfw.OpenWindow(Width, Height, 8, 8, 8, 8, 8, 8, glfw.Windowed); err != nil {
panic(err)
}
glfw.SetSwapInterval(1) //0 to disable vsync, 1 to enable it
glfw.SetWindowTitle(windowTitle)
glfw.SetWindowSizeCallback(onResize)
glfw.SetKeyCallback(input.OnKey)
glfw.SetCharCallback(input.OnChar)
glfw.SetMouseButtonCallback(input.ButtonPress)
glfw.SetMouseWheel(0)
glfw.SetMouseWheelCallback(input.MouseWheelCallback)
input.MouseWheelPosition = glfw.MouseWheel
input.MousePosition = glfw.MousePos
if err = initGL(); err != nil {
panic(err)
}
fmt.Println("Opengl Initialized!")
TextureMaterial = NewBasicMaterial(spriteVertexShader, spriteFragmentShader)
err = TextureMaterial.Load()
if err != nil {
fmt.Println(err)
}
SDFMaterial = NewBasicMaterial(sdfVertexShader, sdfFragmentShader)
err = SDFMaterial.Load()
if err != nil {
fmt.Println(err)
}
internalMaterial = NewBasicMaterial(spriteVertexShader, spriteFragmentShader)
err = internalMaterial.Load()
if err != nil {
fmt.Println(err)
}
initDefaultPlane()
glfw.SwapBuffers()
gameTime = time.Time{}
lastTime = time.Now()
dl = glfw.Time()
}
func main() {
var err error
if err = glfw.Init(); err != nil {
log.Fatalf("%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 {
log.Fatalf("%v\n", err)
return
}
defer glfw.CloseWindow()
glfw.SetWindowTitle("Aliasing Detector")
glfw.SetSwapInterval(1)
if samples := glfw.WindowParam(glfw.FsaaSamples); samples != 0 {
fmt.Printf("Context reports FSAA is supported with %d samples\n", samples)
} else {
fmt.Printf("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 (rw *RenderWindow) Open() error {
err := glfw.OpenWindow(int(rw.Width), int(rw.Height), 8, 8, 8, 8, 0, 0, glfw.Windowed)
if err != nil {
return err
}
glfw.SetWindowTitle(rw.Title)
glfw.SetSwapInterval(2)
glfw.SetKeyCallback(rw.onKey)
glfw.SetWindowSizeCallback(rw.onResize)
return nil
}
func main() {
fmt.Print("GLFW Init Start.")
glfw.Init()
fmt.Println(" GLFW Init Done.")
defer glfw.Terminate()
defer fmt.Println("example Terminating.")
fmt.Println("GLFW Set Hints.")
glfw.OpenWindowHint(glfw.WindowNoResize, 1)
fmt.Print("GLFW Open Window Start.")
glfw.OpenWindow(640, 480, 8, 8, 8, 0, 0, 0, glfw.Windowed)
glfw.SetWindowTitle("example")
fmt.Println(" GLFW Open Window Done.")
v1, v2, v3 := glfw.GLVersion()
fmt.Printf("OpenGL version: %d.%d.%d\n", v1, v2, v3)
fmt.Printf("GLFW version: %d.%d.%d\n", glfw.VersionMajor, glfw.VersionMinor, glfw.VersionRevision)
glfw.SetSwapInterval(1)
fps := time.Duration(30)
fmt.Printf("Creating %d Hz Ticker.", fps)
ticker := time.NewTicker(time.Second / fps)
fmt.Printf(" %d Hz Ticker Created\n", fps)
closedWindow := glfwHelper.WindowCloseChan()
mouseButtons := glfwHelper.MouseButtonChan()
mousePos := glfwHelper.MousePosChan()
mouseWheel := glfwHelper.MouseWheelChan()
keyButtons := glfwHelper.KeyChan()
charButtons := glfwHelper.CharChan()
for {
select {
case <-ticker.C:
glfw.SwapBuffers()
case <-closedWindow:
return
case input := <-mouseButtons:
fmt.Println(input)
case input := <-mousePos:
fmt.Println(input)
case input := <-mouseWheel:
fmt.Println(input)
case input := <-keyButtons:
fmt.Println(input)
case input := <-charButtons:
fmt.Println(string(input))
}
}
}
func main() {
var err error
if err = glfw.Init(); err != nil {
fmt.Fprintf(os.Stderr, "[e] %v\n", err)
return
}
// Ensure glfw is cleanly terminated on exit.
defer glfw.Terminate()
if err = glfw.OpenWindow(256, 256, 8, 8, 8, 0, 0, 0, glfw.Windowed); err != nil {
fmt.Fprintf(os.Stderr, "[e] %v\n", err)
return
}
// Ensure window is cleanly closed on exit.
defer glfw.CloseWindow()
// Enable vertical sync on cards that support it.
glfw.SetSwapInterval(1)
// Set window title
glfw.SetWindowTitle("Simple GLFW window")
// Hook some events to demonstrate use of callbacks.
// These are not necessary if you don't need them.
glfw.SetWindowSizeCallback(onResize)
glfw.SetWindowCloseCallback(onClose)
glfw.SetMouseButtonCallback(onMouseBtn)
glfw.SetMouseWheelCallback(onMouseWheel)
glfw.SetKeyCallback(onKey)
glfw.SetCharCallback(onChar)
// Start loop
running := true
for running {
// OpenGL rendering goes here.
// Swap front and back rendering buffers. This also implicitly calls
// glfw.PollEvents(), so we have valid key/mouse/joystick states after
// this. This behavior can be disabled by calling glfw.Disable with the
// argument glfw.AutoPollEvents. You must be sure to manually call
// PollEvents() or WaitEvents() in this case.
glfw.SwapBuffers()
// Break out of loop when Escape key is pressed, or window is closed.
running = glfw.Key(glfw.KeyEsc) == 0 && glfw.WindowParam(glfw.Opened) == 1
}
}
func InitGL(width, height int) {
//enable vertical sync if the card supports it
glfw.SetSwapInterval(1)
gl.ShadeModel(gl.SMOOTH)
gl.ClearColor(0.1, 0.1, 0.1, 1.0)
gl.Enable(gl.TEXTURE_2D)
gl.Enable(gl.CULL_FACE)
gl.Enable(gl.DEPTH_TEST)
gl.DepthFunc(gl.LEQUAL)
gl.Hint(gl.PERSPECTIVE_CORRECTION_HINT, gl.NICEST)
SetViewport(width, height)
glfw.SetWindowSizeCallback(SetViewport)
glfw.SetKeyCallback(OnKey)
}
// 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
}
func (v *video) init() error {
// Disclaimer: I'm an absolute noob in openGL and I just slammed the
// keyboard with my text editor open, until it started to produce usable
// results. I don't fully understand everything I'm doing here.
if err := glfw.Init(); err != nil {
return err
}
err := glfw.OpenWindow(screenWidth*pixelSize, screenHeight*pixelSize, 0, 0, 0, 0, 0, 0, glfw.Windowed)
if err != nil {
return err
}
// Enable vertical sync on cards that support it.
glfw.SetSwapInterval(1)
glfw.SetWindowTitle("nictuku's CHIP-8 emulator")
gl.Init()
if err = glh.CheckGLError(); err != nil {
return err
}
gl.ClearColor(0, 0, 0, 0)
gl.MatrixMode(gl.PROJECTION)
// Change coordinates to range from [0, 64] and [0,32].
gl.Ortho(0, screenWidth, screenHeight, 0, 0, 1)
// Unnecessary sanity check. :-P
if glfw.WindowParam(glfw.Opened) == 0 {
return fmt.Errorf("No window opened")
}
return nil
}
func (me *context) SetSwapInterval(interval int) {
glfw.SetSwapInterval(interval)
}
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
}
glfw.SetSwapInterval(0)
//gl.GlewExperimental(true)
gl.Init() // Can't find gl.GLEW_OK or any variation, not sure how to check if this worked
gl.GetError() // ignore error, since we're telling it to use CoreProfile above, we get "invalid enumerant" (GLError 1280) which freaks the OpenGLSentinel out
glfw.SetWindowTitle("Tutorial 09")
glfw.Enable(glfw.StickyKeys)
glfw.Disable(glfw.MouseCursor) // Not in the original tutorial, but IMO it SHOULD be there
glfw.SetMousePos(1024.0/2.0, 768.0/2.0)
gl.ClearColor(0., 0., 0.4, 0.)
gl.Enable(gl.DEPTH_TEST)
gl.DepthFunc(gl.LESS)
gl.Enable(gl.CULL_FACE)
camera := input.NewCamera()
vertexArray := gl.GenVertexArray()
defer vertexArray.Delete()
vertexArray.Bind()
prog := helper.MakeProgram("StandardShading.vertexshader", "StandardShading.fragmentshader")
defer prog.Delete()
matrixID := prog.GetUniformLocation("MVP")
viewMatrixID := prog.GetUniformLocation("V")
modelMatrixID := prog.GetUniformLocation("M")
texture := helper.MakeTextureFromTGA("uvmap.tga") // Had to convert to tga, go-gl is missing the texture method for DDS right now
defer texture.Delete()
texSampler := prog.GetUniformLocation("myTextureSampler")
meshObj := objloader.LoadObject("suzanne.obj")
indices, indexedVertices, indexedUVs, indexedNormals := indexer.IndexVBO(meshObj.Vertices, meshObj.UVs, meshObj.Normals)
vertexBuffer := gl.GenBuffer()
defer vertexBuffer.Delete()
vertexBuffer.Bind(gl.ARRAY_BUFFER)
gl.BufferData(gl.ARRAY_BUFFER, len(indexedVertices)*3*4, indexedVertices, gl.STATIC_DRAW)
uvBuffer := gl.GenBuffer()
defer uvBuffer.Delete()
uvBuffer.Bind(gl.ARRAY_BUFFER)
// And yet, the weird length stuff doesn't seem to matter for UV or normal
gl.BufferData(gl.ARRAY_BUFFER, len(indexedUVs)*2*4, indexedUVs, gl.STATIC_DRAW)
normBuffer := gl.GenBuffer()
defer normBuffer.Delete()
normBuffer.Bind(gl.ARRAY_BUFFER)
gl.BufferData(gl.ARRAY_BUFFER, len(indexedNormals)*3*4, indexedNormals, gl.STATIC_DRAW)
elementBuffer := gl.GenBuffer()
defer elementBuffer.Delete()
elementBuffer.Bind(gl.ELEMENT_ARRAY_BUFFER)
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, len(indices)*2, indices, gl.STATIC_DRAW) // NOTE: a GL_UNSIGNED_SHORT is 16-bits
lightID := prog.GetUniformLocation("LightPosition_worldspace")
lastTime := glfw.Time()
nbFrames := 0
// Equivalent to a do... while
for ok := true; ok; ok = (glfw.Key(glfw.KeyEsc) != glfw.KeyPress && glfw.WindowParam(glfw.Opened) == gl.TRUE && glfw.Key('Q') != glfw.KeyPress) {
currTime := glfw.Time()
nbFrames++
if currTime-lastTime >= 1.0 {
fmt.Printf("%f ms/frame\n", 1000.0/float64(nbFrames))
nbFrames = 0
lastTime += 1.0
}
func() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
prog.Use()
defer gl.ProgramUnuse()
view, proj := camera.ComputeViewPerspective()
model := mathgl.Ident4f()
MVP := proj.Mul4(view).Mul4(model)
//mvpArray := mvp.AsCMOArray(mathgl.FLOAT32).([16]float32)
//vArray := view.AsCMOArray(mathgl.FLOAT32).([16]float32)
//mArray := model.AsCMOArray(mathgl.FLOAT32).([16]float32)
matrixID.UniformMatrix4fv(false, MVP)
viewMatrixID.UniformMatrix4fv(false, view)
modelMatrixID.UniformMatrix4fv(false, model)
lightID.Uniform3f(4., 4., 4.)
gl.ActiveTexture(gl.TEXTURE0)
texture.Bind(gl.TEXTURE_2D)
defer texture.Unbind(gl.TEXTURE_2D)
texSampler.Uniform1i(0)
vertexAttrib := gl.AttribLocation(0)
vertexAttrib.EnableArray()
defer vertexAttrib.DisableArray()
vertexBuffer.Bind(gl.ARRAY_BUFFER)
defer vertexBuffer.Unbind(gl.ARRAY_BUFFER)
vertexAttrib.AttribPointer(3, gl.FLOAT, false, 0, nil)
uvAttrib := gl.AttribLocation(1)
uvAttrib.EnableArray()
defer uvAttrib.DisableArray()
uvBuffer.Bind(gl.ARRAY_BUFFER)
defer uvBuffer.Unbind(gl.ARRAY_BUFFER)
uvAttrib.AttribPointer(2, gl.FLOAT, false, 0, nil)
normAttrib := gl.AttribLocation(2)
normAttrib.EnableArray()
defer normAttrib.DisableArray()
normBuffer.Bind(gl.ARRAY_BUFFER)
defer normBuffer.Unbind(gl.ARRAY_BUFFER)
normAttrib.AttribPointer(3, gl.FLOAT, false, 0, nil)
elementBuffer.Bind(gl.ELEMENT_ARRAY_BUFFER)
defer elementBuffer.Unbind(gl.ELEMENT_ARRAY_BUFFER)
gl.DrawElements(gl.TRIANGLES, len(indices), gl.UNSIGNED_SHORT, nil)
glfw.SwapBuffers()
}() // Defers unbinds and disables to here, end of the loop
}
}
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
}
glfw.SetSwapInterval(0)
//gl.GlewExperimental(true)
gl.Init() // Can't find gl.GLEW_OK or any variation, not sure how to check if this worked
gl.GetError() // ignore error, since we're telling it to use CoreProfile above, we get "invalid enumerant" (GLError 1280) which freaks the OpenGLSentinel out
// With go-gl we also apparently can't set glewExpe6rimental
glfw.SetWindowTitle("Tutorial 05")
glfw.Enable(glfw.StickyKeys)
glfw.Disable(glfw.MouseCursor) // Not in the original tutorial, but IMO it SHOULD be there
glfw.SetMousePos(1024.0/2.0, 768.0/2.0)
gl.ClearColor(0., 0., 0.4, 0.)
gl.Enable(gl.DEPTH_TEST)
gl.DepthFunc(gl.LESS)
gl.Enable(gl.CULL_FACE)
camera := input.NewCamera()
vertexArray := gl.GenVertexArray()
defer vertexArray.Delete()
vertexArray.Bind()
prog := helper.MakeProgram("TransformVertexShader.vertexshader", "TextureFragmentShader.fragmentshader")
defer prog.Delete()
matrixID := prog.GetUniformLocation("MVP")
texture := helper.MakeTextureFromTGA("uvtemplate.tga")
defer texture.Delete()
texSampler := prog.GetUniformLocation("myTextureSampler")
vBufferData := [...]float32{
-1.0, -1.0, -1.0,
-1.0, -1.0, 1.0,
-1.0, 1.0, 1.0,
1.0, 1.0, -1.0,
-1.0, -1.0, -1.0,
-1.0, 1.0, -1.0,
1.0, -1.0, 1.0,
-1.0, -1.0, -1.0,
1.0, -1.0, -1.0,
1.0, 1.0, -1.0,
1.0, -1.0, -1.0,
-1.0, -1.0, -1.0,
-1.0, -1.0, -1.0,
-1.0, 1.0, 1.0,
-1.0, 1.0, -1.0,
1.0, -1.0, 1.0,
-1.0, -1.0, 1.0,
-1.0, -1.0, -1.0,
-1.0, 1.0, 1.0,
-1.0, -1.0, 1.0,
1.0, -1.0, 1.0,
1.0, 1.0, 1.0,
1.0, -1.0, -1.0,
1.0, 1.0, -1.0,
1.0, -1.0, -1.0,
1.0, 1.0, 1.0,
1.0, -1.0, 1.0,
1.0, 1.0, 1.0,
1.0, 1.0, -1.0,
-1.0, 1.0, -1.0,
1.0, 1.0, 1.0,
-1.0, 1.0, -1.0,
-1.0, 1.0, 1.0,
1.0, 1.0, 1.0,
-1.0, 1.0, 1.0,
1.0, -1.0, 1.0}
uvBufferData := [...]float32{
0.000059, 1.0 - 0.000004,
0.000103, 1.0 - 0.336048,
0.335973, 1.0 - 0.335903,
1.000023, 1.0 - 0.000013,
0.667979, 1.0 - 0.335851,
0.999958, 1.0 - 0.336064,
0.667979, 1.0 - 0.335851,
0.336024, 1.0 - 0.671877,
0.667969, 1.0 - 0.671889,
1.000023, 1.0 - 0.000013,
0.668104, 1.0 - 0.000013,
0.667979, 1.0 - 0.335851,
0.000059, 1.0 - 0.000004,
0.335973, 1.0 - 0.335903,
0.336098, 1.0 - 0.000071,
0.667979, 1.0 - 0.335851,
0.335973, 1.0 - 0.335903,
0.336024, 1.0 - 0.671877,
1.000004, 1.0 - 0.671847,
0.999958, 1.0 - 0.336064,
0.667979, 1.0 - 0.335851,
0.668104, 1.0 - 0.000013,
0.335973, 1.0 - 0.335903,
0.667979, 1.0 - 0.335851,
0.335973, 1.0 - 0.335903,
0.668104, 1.0 - 0.000013,
0.336098, 1.0 - 0.000071,
0.000103, 1.0 - 0.336048,
0.000004, 1.0 - 0.671870,
0.336024, 1.0 - 0.671877,
0.000103, 1.0 - 0.336048,
0.336024, 1.0 - 0.671877,
0.335973, 1.0 - 0.335903,
0.667969, 1.0 - 0.671889,
1.000004, 1.0 - 0.671847,
0.667979, 1.0 - 0.335851}
vertexBuffer := gl.GenBuffer()
defer vertexBuffer.Delete()
vertexBuffer.Bind(gl.ARRAY_BUFFER)
gl.BufferData(gl.ARRAY_BUFFER, len(vBufferData)*4, &vBufferData, gl.STATIC_DRAW)
uvBuffer := gl.GenBuffer()
defer uvBuffer.Delete()
uvBuffer.Bind(gl.ARRAY_BUFFER)
gl.BufferData(gl.ARRAY_BUFFER, len(uvBufferData)*4, &uvBufferData, 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 && glfw.Key('Q') != glfw.KeyPress) {
func() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
prog.Use()
defer gl.ProgramUnuse()
view, proj := camera.ComputeViewPerspective()
model := mathgl.Ident4f()
MVP := proj.Mul4(view).Mul4(model)
//mvpArray := mvp.AsCMOArray(mathgl.FLOAT32).([16]float32)
matrixID.UniformMatrix4fv(false, MVP)
gl.ActiveTexture(gl.TEXTURE0)
texture.Bind(gl.TEXTURE_2D)
defer texture.Unbind(gl.TEXTURE_2D)
texSampler.Uniform1i(0)
vertexAttrib := gl.AttribLocation(0)
vertexAttrib.EnableArray()
defer vertexAttrib.DisableArray()
vertexBuffer.Bind(gl.ARRAY_BUFFER)
defer vertexBuffer.Unbind(gl.ARRAY_BUFFER)
vertexAttrib.AttribPointer(3, gl.FLOAT, false, 0, nil)
uvAttrib := gl.AttribLocation(1)
uvAttrib.EnableArray()
defer uvAttrib.DisableArray()
uvBuffer.Bind(gl.ARRAY_BUFFER)
defer uvBuffer.Unbind(gl.ARRAY_BUFFER)
uvAttrib.AttribPointer(2, gl.FLOAT, false, 0, nil)
gl.DrawArrays(gl.TRIANGLES, 0, 12*3)
glfw.SwapBuffers()
}() // Defers unbinds and disables to here, end of the loop
}
}
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
}
glfw.SetSwapInterval(0)
//gl.GlewExperimental(true)
gl.Init() // Can't find gl.GLEW_OK or any variation, not sure how to check if this worked
gl.GetError() // ignore error, since we're telling it to use CoreProfile above, we get "invalid enumerant" (GLError 1280) which freaks the OpenGLSentinel out
glfw.SetWindowTitle("Tutorial 07")
glfw.Enable(glfw.StickyKeys)
glfw.Disable(glfw.MouseCursor) // Not in the original tutorial, but IMO it SHOULD be there
glfw.SetMousePos(1024.0/2.0, 768.0/2.0)
gl.ClearColor(0., 0., 0.4, 0.)
gl.Enable(gl.DEPTH_TEST)
gl.DepthFunc(gl.LESS)
gl.Enable(gl.CULL_FACE)
camera := input.NewCamera()
vertexArray := gl.GenVertexArray()
defer vertexArray.Delete()
vertexArray.Bind()
prog := helper.MakeProgram("TransformVertexShader.vertexshader", "TextureFragmentShader.fragmentshader")
defer prog.Delete()
matrixID := prog.GetUniformLocation("MVP")
texture := helper.MakeTextureFromTGA("uvmap.tga") // Had to convert to tga, go-gl is missing the texture method for DDS right now
defer texture.Delete()
texSampler := prog.GetUniformLocation("myTextureSampler")
meshObj := objloader.LoadObject("cube.obj")
vertices, uvs := meshObj.Vertices, meshObj.UVs
vertexBuffer := gl.GenBuffer()
defer vertexBuffer.Delete()
vertexBuffer.Bind(gl.ARRAY_BUFFER)
gl.BufferData(gl.ARRAY_BUFFER, len(vertices)*3*4, vertices, gl.STATIC_DRAW)
uvBuffer := gl.GenBuffer()
defer uvBuffer.Delete()
uvBuffer.Bind(gl.ARRAY_BUFFER)
// UV doesn't seem to care
gl.BufferData(gl.ARRAY_BUFFER, len(uvs)*2*4, uvs, 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 && glfw.Key('Q') != glfw.KeyPress) {
func() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
prog.Use()
defer gl.ProgramUnuse()
view, proj := camera.ComputeViewPerspective()
model := mathgl.Ident4f()
MVP := proj.Mul4(view).Mul4(model)
matrixID.UniformMatrix4fv(false, MVP)
gl.ActiveTexture(gl.TEXTURE0)
texture.Bind(gl.TEXTURE_2D)
defer texture.Unbind(gl.TEXTURE_2D)
texSampler.Uniform1i(0)
vertexAttrib := gl.AttribLocation(0)
vertexAttrib.EnableArray()
defer vertexAttrib.DisableArray()
vertexBuffer.Bind(gl.ARRAY_BUFFER)
defer vertexBuffer.Unbind(gl.ARRAY_BUFFER)
vertexAttrib.AttribPointer(3, gl.FLOAT, false, 0, nil)
uvAttrib := gl.AttribLocation(1)
uvAttrib.EnableArray()
defer uvAttrib.DisableArray()
uvBuffer.Bind(gl.ARRAY_BUFFER)
defer uvBuffer.Unbind(gl.ARRAY_BUFFER)
uvAttrib.AttribPointer(2, gl.FLOAT, false, 0, nil)
gl.DrawArrays(gl.TRIANGLES, 0, len(vertices))
glfw.SwapBuffers()
}() // Defers unbinds and disables to here, end of the loop
}
}
func main() {
if err := glfw.Init(); err != nil {
log.Fatal(err.Error())
}
if err := glfw.OpenWindow(800, 600, 8, 8, 8, 8, 32, 0, glfw.Windowed); err != nil {
glfw.Terminate()
log.Fatal(err.Error())
}
glfw.SetWindowTitle("Landscapes")
glfw.SetSwapInterval(1)
m := GenerateMap(160, 160, 16)
m.BuildVertices()
gl.Enable(gl.LIGHT0)
gl.Enable(gl.LIGHTING)
gl.Lightfv(gl.LIGHT0, gl.POSITION, []float32{0, 1, 0.2, 0})
gl.Lightfv(gl.LIGHT0, gl.AMBIENT, []float32{0.0, 0.0, 0.0, 1})
gl.Lightfv(gl.LIGHT0, gl.DIFFUSE, []float32{0.75, 0.75, 0.75, 1})
gl.Lightfv(gl.LIGHT0, gl.SPECULAR, []float32{1, 1, 1, 1})
gl.ShadeModel(gl.SMOOTH)
gl.ClearColor(0.1, 0.05, 0.0, 1.0)
far := 4096.0
fov := 60.0
gl.MatrixMode(gl.PROJECTION)
gl.LoadIdentity()
glu.Perspective(fov, 800.0/600, 1.0, far)
gl.MatrixMode(gl.MODELVIEW)
rot := float32(0.0)
for glfw.WindowParam(glfw.Opened) == 1 {
rot += 0.125
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.LoadIdentity()
gl.Enable(gl.DEPTH_TEST)
gl.DepthFunc(gl.LEQUAL)
cx := float32(m.width*m.gridSize) * 0.5
cy := float32(m.maxHeight) * 0.15
cz := float32(m.depth*m.gridSize) * 0.5
gl.Translatef(0, 0, -2000)
gl.Rotatef(30, 1, 0, 0)
gl.Rotatef(rot, 0, 1, 0)
gl.Translatef(-cx, -cy, -cz)
m.Draw()
glfw.SwapBuffers()
}
glfw.Terminate()
}
func main() {
var err error
if err = glfw.Init(); err != nil {
fmt.Fprintf(os.Stderr, "[e] %v\n", err)
return
}
defer glfw.Terminate()
w, h := 1980, 1080
// w, h := 1280, 768
if err = glfw.OpenWindow(w, h, 8, 8, 8, 16, 0, 32, glfw.Fullscreen); err != nil {
fmt.Fprintf(os.Stderr, "[e] %v\n", err)
return
}
defer glfw.CloseWindow()
glfw.SetSwapInterval(1)
glfw.SetWindowTitle("Debris")
quadric = glu.NewQuadric()
gl.Enable(gl.CULL_FACE)
gl.Enable(gl.DEPTH_TEST)
gl.DepthFunc(gl.LEQUAL)
gl.Enable(gl.NORMALIZE)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.ShadeModel(gl.SMOOTH)
gl.Enable(gl.LIGHTING)
var (
ambient = []float32{0.1, 0.3, 0.6, 1}
diffuse = []float32{1, 1, 0.5, 1}
specular = []float32{0.4, 0.4, 0.4, 1}
light_position = []float32{1, 0, 0, 0}
// mat_specular []float32 = []float32{1, 1, 0.5, 1}
mat_specular = []float32{1, 1, 0.75, 1}
mat_shininess = float32(120)
// light_position []float32 = []float32{0.0, 0.0, 1.0, 0.0}
)
const (
fov = 1.1 // degrees
znear = 145
zfar = 155
camera_z_offset = -150
camera_x_rotation = 0 // degrees
// camera_x_rotation = 20 // degrees
starfield_fov = 45
faces = 1000
earth_radius = 1
)
gl.Lightfv(gl.LIGHT1, gl.AMBIENT, ambient)
gl.Lightfv(gl.LIGHT1, gl.DIFFUSE, diffuse)
gl.Lightfv(gl.LIGHT1, gl.SPECULAR, specular)
gl.Lightfv(gl.LIGHT1, gl.POSITION, light_position)
gl.Enable(gl.LIGHT1)
mat_emission := []float32{0, 0, 0.1, 1}
gl.Materialfv(gl.FRONT_AND_BACK, gl.EMISSION, mat_emission)
gl.Materialfv(gl.FRONT_AND_BACK, gl.SPECULAR, mat_specular)
gl.Materialf(gl.FRONT_AND_BACK, gl.SHININESS, mat_shininess)
gl.ClearColor(0.02, 0.02, 0.02, 1)
gl.ClearDepth(1)
gl.ClearStencil(0)
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
b := createBuffer()
planetoids := []*Planetoid{}
for i := 0; i < 1000; i++ {
p := &Planetoid{
apogee: 1.2 + rand.Float64()*0.7,
perigee: 1.5,
// inclination: 45,
inclination: rand.Float64()*20 - 10,
// inclination: 0,
phase0: rand.Float64() * 360,
rising_node: rand.Float64() * 10,
phase: 0,
// radius: rand.Float32()*0.05 + 0.01, //float32(r),
radius: rand.Float32()*0.0125 + 0.005, //float32(r),
// quadric: glu.NewQuadric(),
circle: b,
}
planetoids = append(planetoids, p)
}
// Initial projection matrix:
var aspect float64
glfw.SetWindowSizeCallback(func(w, h int) {
gl.Viewport(0, 0, w, h)
gl.MatrixMode(gl.PROJECTION)
gl.LoadIdentity()
aspect = float64(w) / float64(h)
glu.Perspective(fov, aspect, znear, zfar)
})
d := float64(0)
wireframe := false
atmosphere := false
polar := false
rotating := false
front := false
earth := true
cone := true
shadowing := true
tilt := false
running := true
glfw.SetKeyCallback(func(key, state int) {
if state != glfw.KeyPress {
// Don't act on key coming up
return
}
switch key {
case 'A':
atmosphere = !atmosphere
case 'C':
cone = !cone
case 'E':
earth = !earth
case 'R':
rotating = !rotating
case 'F':
front = !front
if front {
gl.FrontFace(gl.CW)
} else {
gl.FrontFace(gl.CCW)
}
case 'S':
shadowing = !shadowing
case 'T':
tilt = !tilt
case 'W':
wireframe = !wireframe
method := gl.GLenum(gl.FILL)
if wireframe {
method = gl.LINE
}
gl.PolygonMode(gl.FRONT_AND_BACK, method)
case glfw.KeyF2:
println("Screenshot captured")
// glh.CaptureToPng("screenshot.png")
w, h := glh.GetViewportWH()
im := image.NewRGBA(image.Rect(0, 0, w, h))
glh.ClearAlpha(1)
gl.Flush()
glh.CaptureRGBA(im)
go func() {
fd, err := os.Create("screenshot.png")
if err != nil {
panic("Unable to open file")
}
defer fd.Close()
png.Encode(fd, im)
}()
case 'Q', glfw.KeyEsc:
running = !running
case glfw.KeySpace:
polar = !polar
}
})
_ = rand.Float64
stars := glh.NewMeshBuffer(
glh.RenderArrays,
glh.NewPositionAttr(3, gl.DOUBLE, gl.STATIC_DRAW),
glh.NewColorAttr(3, gl.DOUBLE, gl.STATIC_DRAW))
const Nstars = 50000
points := make([]float64, 3*Nstars)
colors := make([]float64, 3*Nstars)
for i := 0; i < Nstars; i++ {
const R = 1
phi := rand.Float64() * 2 * math.Pi
z := R * (2*rand.Float64() - 1)
theta := math.Asin(z / R)
points[i*3+0] = R * math.Cos(theta) * math.Cos(phi)
points[i*3+1] = R * math.Cos(theta) * math.Sin(phi)
points[i*3+2] = z
const r = 0.8
v := rand.Float64()*r + (1 - r)
colors[i*3+0] = v
colors[i*3+1] = v
colors[i*3+2] = v
}
stars.Add(points, colors)
render_stars := func() {
glh.With(glh.Attrib{gl.DEPTH_BUFFER_BIT | gl.ENABLE_BIT}, func() {
gl.Disable(gl.LIGHTING)
gl.PointSize(1)
gl.Color4f(1, 1, 1, 1)
gl.Disable(gl.DEPTH_TEST)
gl.DepthMask(false)
stars.Render(gl.POINTS)
})
}
render_scene := func() {
// Update light position (sensitive to current modelview matrix)
gl.Lightfv(gl.LIGHT1, gl.POSITION, light_position)
gl.Lightfv(gl.LIGHT2, gl.POSITION, light_position)
if earth {
Sphere(earth_radius, faces)
}
unlit_points := glh.Compound(glh.Disable(gl.LIGHTING), glh.Primitive{gl.POINTS})
glh.With(unlit_points, func() {
gl.Vertex3d(1, 0, 0)
})
for _, p := range planetoids {
const dt = 0.1 // TODO: Frame update
p.Render(dt)
}
glh.With(glh.Disable(gl.LIGHTING), func() {
// Atmosphere
gl.Color4f(0.25, 0.25, 1, 0.1)
if atmosphere && earth {
Sphere(earth_radius*1.025, 100)
}
gl.PointSize(10)
glh.With(glh.Primitive{gl.POINTS}, func() {
gl.Color4f(1.75, 0.75, 0.75, 1)
gl.Vertex3d(-1.04, 0, 0)
})
})
}
render_shadow_volume := func() {
glh.With(glh.Attrib{
gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT | gl.ENABLE_BIT |
gl.POLYGON_BIT | gl.STENCIL_BUFFER_BIT,
}, func() {
gl.Disable(gl.LIGHTING)
if shadowing {
// gl.Disable(gl.DEPTH_TEST)
gl.DepthMask(false)
gl.DepthFunc(gl.LEQUAL)
gl.Enable(gl.STENCIL_TEST)
gl.ColorMask(false, false, false, false)
gl.StencilFunc(gl.ALWAYS, 1, 0xffffffff)
}
shadow_volume := func() {
const sv_length = 2
const sv_granularity = 100
const sv_radius = earth_radius * 1.001
// Shadow cone
glh.With(glh.Matrix{gl.MODELVIEW}, func() {
gl.Rotatef(90, 1, 0, 0)
gl.Rotatef(90, 0, -1, 0)
gl.Color4f(0.5, 0.5, 0.5, 1)
glu.Cylinder(quadric, sv_radius, sv_radius*1.05,
sv_length, sv_granularity, 1)
glu.Disk(quadric, 0, sv_radius, sv_granularity, 1)
glh.With(glh.Matrix{gl.MODELVIEW}, func() {
gl.Translated(0, 0, sv_length)
glu.Disk(quadric, 0, sv_radius*1.05, sv_granularity, 1)
})
})
for _, p := range planetoids {
p.RenderShadowVolume()
}
}
if cone {
gl.FrontFace(gl.CCW)
gl.StencilOp(gl.KEEP, gl.KEEP, gl.INCR)
shadow_volume()
gl.FrontFace(gl.CW)
gl.StencilOp(gl.KEEP, gl.KEEP, gl.DECR)
shadow_volume()
}
if shadowing {
gl.StencilFunc(gl.NOTEQUAL, 0, 0xffffffff)
gl.StencilOp(gl.KEEP, gl.KEEP, gl.KEEP)
gl.ColorMask(true, true, true, true)
// gl.Disable(gl.STENCIL_TEST)
gl.Disable(gl.DEPTH_TEST)
gl.FrontFace(gl.CCW)
// gl.Color4f(1, 0, 0, 0.75)
gl.Color4f(0, 0, 0, 0.75)
// gl.Color4f(1, 1, 1, 0.75)
gl.LoadIdentity()
gl.Translated(0, 0, camera_z_offset)
// TODO: Figure out why this doesn't draw over the whole screen
glh.With(glh.Disable(gl.LIGHTING), func() {
glh.DrawQuadd(-10, -10, 20, 20)
})
// gl.FrontFace(gl.CW)
// gl.Enable(gl.LIGHTING)
// gl.Disable(gl.LIGHT1)
// render_scene()
// gl.Enable(gl.LIGHT1)
}
})
}
_ = render_stars
for running {
running = glfw.WindowParam(glfw.Opened) == 1
glfw.SwapBuffers()
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT | gl.STENCIL_BUFFER_BIT)
rotation := func() {
if tilt {
gl.Rotated(20, 1, 0, 0)
}
if polar {
gl.Rotated(90, 1, 0, 0)
}
gl.Rotated(d, 0, -1, 0)
}
// Star field
glh.With(glh.Matrix{gl.PROJECTION}, func() {
gl.LoadIdentity()
glu.Perspective(starfield_fov, aspect, 0, 1)
glh.With(glh.Matrix{gl.MODELVIEW}, func() {
gl.LoadIdentity()
rotation()
render_stars()
})
})
gl.MatrixMode(gl.MODELVIEW)
gl.LoadIdentity()
gl.Translated(0, 0, camera_z_offset)
rotation()
if rotating {
d += 0.2
}
_ = render_scene
render_scene()
_ = render_shadow_volume
render_shadow_volume()
}
}
func (me *WindowOptions) SetSwapInterval(newSwap int) {
me.swap = newSwap
if me.Created() {
glfw.SetSwapInterval(me.swap)
}
}
func New(width int, height int, title string) *Window {
var err error
window := &Window{width: width, height: height, title: title}
// initialize logger
logf, err := os.OpenFile("window.log", os.O_WRONLY|os.O_CREATE, 0640)
logger := log.New(logf, "", log.Ldate|log.Ltime)
if err = glfw.Init(); err != nil {
fmt.Fprintf(os.Stderr, "[e] %v\n", err)
return nil
}
// width, hieght, r,g,b,a (color depth bits), depth, stencil, mode
if err = glfw.OpenWindow(window.width, window.height, 8, 8, 8, 0, 0, 0, glfw.Windowed); err != nil {
fmt.Fprintf(os.Stderr, "[e] %v\n", err)
return nil
}
onResize := func(w, h int) {
logger.Printf("resized: %dx%d\n", w, h)
}
onClose := func() int {
logger.Println("window closed\n")
return 1 // return 0 to keep window open.
}
// list callback generators
createBtnList := func(btnNext func() interface{}, device string) func(button, state int) {
btnList := list.New()
btnNext = func() interface{} { return btnList.Remove(btnList.Back()) }
return func(button, state int) {
btnList.PushFront(btnEvent{button: button, state: state})
logger.Printf("%s button: %d, %d\n", device, button, state)
}
}
createPosList := func(posNext func() interface{}, device string) func(x, y int) {
posList := list.New()
posNext = func() interface{} { return posList.Remove(posList.Back()) }
return func(x, y int) {
posList.PushFront(posEvent{x: x, y: y})
logger.Printf("%s pos: %d, %d\n", device, x, y)
}
}
createDeltaList := func(deltaNext func() interface{}, device string) func(delta int) {
deltaList := list.New()
deltaNext = func() interface{} { return deltaList.Remove(deltaList.Back()) }
return func(delta int) {
deltaList.PushFront(deltaEvent{delta: delta})
logger.Printf("%s delta: %d\n", device, delta)
}
}
glfw.SetSwapInterval(1)
glfw.SetWindowTitle(title)
glfw.SetWindowSizeCallback(onResize)
glfw.SetWindowCloseCallback(onClose)
glfw.SetMousePosCallback(createPosList(window.MousePos, "mouse pos"))
glfw.SetMouseButtonCallback(createBtnList(window.MouseBtn, "mouse"))
glfw.SetMouseWheelCallback(createDeltaList(window.MouseWheel, "mouse wheel"))
glfw.SetKeyCallback(createBtnList(window.KeyEvt, "keyboard"))
glfw.SetCharCallback(createBtnList(window.CharEvt, "char"))
window.Start = func() {
defer glfw.Terminate()
defer glfw.CloseWindow()
running := true
for running {
window.Render()
glfw.SwapBuffers()
// Break out of loop when Escape key is pressed, or window is closed.
running = glfw.Key(glfw.KeyEsc) == 0 && glfw.WindowParam(glfw.Opened) == 1
}
}
return window
}