func (self *Application) run() error {
if err := glfw.Init(); err != nil {
return err
}
defer glfw.Terminate()
glfw.WindowHint(glfw.Resizable, glfw.False)
glfw.WindowHint(glfw.ContextVersionMajor, 4)
glfw.WindowHint(glfw.ContextVersionMinor, 1)
glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
window, err := glfw.CreateWindow(512, 512, "GL", nil, nil)
if err != nil {
return err
}
window.MakeContextCurrent()
if err := gl.Init(); err != nil {
return err
}
if err := self.setup(); err != nil {
return err
}
for !window.ShouldClose() {
self.display()
window.SwapBuffers()
glfw.PollEvents()
}
return nil
}
func CreateContext(width int, height int) (*Context, error) {
if err := glfw.Init(); err != nil {
fmt.Println("failed to initialize glfw:", err)
}
glfw.WindowHint(glfw.Resizable, glfw.False)
glfw.WindowHint(glfw.ContextVersionMajor, 4)
glfw.WindowHint(glfw.ContextVersionMinor, 1)
glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
window, err := glfw.CreateWindow(width, height, "flamingo", nil, nil)
if err != nil {
glfw.Terminate()
return nil, err
}
window.MakeContextCurrent()
// Initialize Glow
if err = gl.Init(); err != nil {
glfw.Terminate()
return nil, err
}
version := gl.GoStr(gl.GetString(gl.VERSION))
fmt.Println("OpenGL version", version)
return &Context{window}, nil
}
func main() {
if err := glfw.Init(); err != nil {
log.Fatalln("failed to inifitialize glfw:", err)
}
defer glfw.Terminate()
glfw.WindowHint(glfw.Resizable, glfw.False)
glfw.WindowHint(glfw.ContextVersionMajor, 4)
glfw.WindowHint(glfw.ContextVersionMinor, 1)
glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
window, err := glfw.CreateWindow(windowWidth, windowHeight, "basic shaders", nil, nil)
if err != nil {
panic(err)
}
window.MakeContextCurrent()
// Initialize Glow (go function bindings)
if err := gl.Init(); err != nil {
panic(err)
}
window.SetKeyCallback(keyCallback)
err = programLoop(window)
if err != nil {
log.Fatal(err)
}
}
func (me *Core) Init() {
if err := glfw.Init(); err != nil {
panic(err)
}
if err := gl.Init(); err != nil {
panic(err)
}
}
func Run() {
if err := glfw.Init(); err != nil {
glog.Fatalln("failed to initialize glfw", err)
}
defer glfw.Terminate()
setupWindowOptions()
window, err := glfw.CreateWindow(WindowWidth, WindowHeight, "Game", nil, nil)
if err != nil {
panic(err)
}
window.MakeContextCurrent()
//initilize Glow
if err := gl.Init(); err != nil {
panic(err)
}
version := gl.GoStr(gl.GetString(gl.VERSION))
fmt.Println("OpenGL version", version)
shaderSource, err := ReadShaders("colorShader")
if err != nil {
panic(err)
}
program, err := NewProgram(shaderSource)
if err != nil {
panic(err)
}
program.Use()
sprite := &SpriteComponent{-.5, -.5, 1, 1}
sprite.ReloadGraphics()
vertAttrib := uint32(gl.GetAttribLocation(program.program, CStr("vertPosition")))
gl.EnableVertexAttribArray(vertAttrib)
gl.VertexAttribPointer(vertAttrib, 3, gl.FLOAT, false, 0, gl.PtrOffset(0))
gl.Enable(gl.DEPTH_TEST)
gl.DepthFunc(gl.LESS)
gl.ClearColor(1.0, 1.0, 1.0, 1.0)
for !window.ShouldClose() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
program.Use()
gl.BindVertexArray(sprite.vaoID)
gl.DrawArrays(gl.TRIANGLES, 0, 2*3)
window.SwapBuffers()
glfw.PollEvents()
}
}
// New returns a newly created Screen
func New(width int, height int, fullscreen bool, FSAA int, name string) *Screen {
window := &Screen{}
C.SDL_Init(C.SDL_INIT_VIDEO)
C.setGlContextAttributes()
C.SDL_GL_SetAttribute(C.SDL_GL_DOUBLEBUFFER, 1)
// Force hardware accel
C.SDL_GL_SetAttribute(C.SDL_GL_ACCELERATED_VISUAL, 1)
if FSAA > 0 {
// FSAA (Fullscreen antialiasing)
C.SDL_GL_SetAttribute(C.SDL_GL_MULTISAMPLEBUFFERS, 1)
C.SDL_GL_SetAttribute(C.SDL_GL_MULTISAMPLESAMPLES, C.int(FSAA)) // 2, 4, 8
}
flags := C.SDL_WINDOW_OPENGL | C.SDL_RENDERER_ACCELERATED
if fullscreen {
flags = flags | C.SDL_WINDOW_FULLSCREEN
}
C.SDL_CreateWindowAndRenderer(C.int(width), C.int(height), C.Uint32(flags), &window.sdlWindow, &window.renderer)
C.SDL_SetWindowTitle(window.sdlWindow, C.CString(name))
C.SDL_GL_CreateContext(window.sdlWindow)
if err := gl.Init(); err != nil {
panic(err)
}
version := gl.GoStr(gl.GetString(gl.VERSION))
fmt.Println("OpenGL version", version)
// Configure global settings
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.ClearColor(0.0, 0.0, 0.0, 1.0)
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
window.Width = width
window.Height = height
window.name = name
window.shouldClose = false
C.SDL_GL_SwapWindow(window.sdlWindow)
window.startTime = time.Now()
window.frameTime = time.Now()
C.SDL_GL_SetSwapInterval(1)
window.vsync = true
return window
}
func makeWindow() *glfw.Window {
win, err := glfw.CreateWindow(windowWidth, windowHeight, "Tutorial #1", nil, nil)
if err != nil {
panic(err)
}
if err := gl.Init(); err != nil {
panic(err)
}
win.MakeContextCurrent()
gl.ClearColor(1.0, 1.0, 1.0, 1.0)
return win
}
func initGL() string {
// Initialize Glow
if err := gl.Init(); err != nil {
panic(err)
}
version := gl.GoStr(gl.GetString(gl.VERSION))
fmt.Println("OpenGL version", version)
fmt.Println("OpenGl shading version", gl.GoStr(gl.GetString(gl.SHADING_LANGUAGE_VERSION)))
fmt.Println("OpenGl renderer", gl.GoStr(gl.GetString(gl.RENDERER)))
// Configure global settings
gl.Enable(gl.DEPTH_TEST)
gl.DepthFunc(gl.LESS)
gl.ClearColor(0.5, 0.5, 0.5, 1.0)
return version
}
func (screen *Screen) Init(title string, onCloseHandler func(), chip *chip8.Chip8) {
var err error
screen.chip = chip
err = glfw.Init()
if err != nil {
panic(err)
}
window, err := glfw.CreateWindow(SCREEN_WIDTH, SCREEN_HEIGHT, title, nil, nil)
if err != nil {
panic(err)
}
window.MakeContextCurrent()
// Initialize Glow
if err := gl.Init(); err != nil {
panic(err)
}
version := gl.GoStr(gl.GetString(gl.VERSION))
fmt.Println("OpenGL version", version)
gl.ClearColor(255.0, 0.0, 0.0, 0.0) //Set the cleared screen colour to black
gl.Viewport(0, 0, int32(SCREEN_WIDTH), int32(SCREEN_HEIGHT)) //This sets up the viewport so that the coordinates (0, 0) are at the top left of the window
for !window.ShouldClose() {
// Do OpenGL stuff
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
window.SwapBuffers()
glfw.PollEvents()
}
onCloseHandler()
}
func CreateWindow(title string, width int, height int) *Window {
if err := glfw.Init(); err != nil {
log.Fatalln("Failed to initialize glfw:", err)
}
/* GLFW Window settings */
glfw.WindowHint(glfw.ContextVersionMajor, 4)
glfw.WindowHint(glfw.ContextVersionMinor, 1)
glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
window, err := glfw.CreateWindow(width, height, title, nil, nil)
if err != nil {
panic(err)
}
window.MakeContextCurrent()
glfw.SwapInterval(2)
/* Initialize OpenGL */
if err := gl.Init(); err != nil {
panic(err)
}
window.SetInputMode(glfw.CursorMode, glfw.CursorDisabled)
window.SetKeyCallback(KeyCallback)
window.SetCursorPosCallback(MouseMoveCallback)
window.SetMouseButtonCallback(MouseButtonCallback)
w := &Window{
Width: width,
Height: height,
Wnd: window,
maxFrameTime: 0.0,
lastFrameTime: glfw.GetTime(),
}
w.SetMaxFps(60)
return w
}
func main() {
if err := glfw.Init(); err != nil {
log.Fatalln("failed to inifitialize glfw:", err)
}
defer glfw.Terminate()
glfw.WindowHint(glfw.Resizable, glfw.False)
glfw.WindowHint(glfw.ContextVersionMajor, 4)
glfw.WindowHint(glfw.ContextVersionMinor, 1)
glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
window, err := glfw.CreateWindow(windowWidth, windowHeight, "Hello!", nil, nil)
if err != nil {
panic(err)
}
window.MakeContextCurrent()
// Initialize Glow (go function bindings)
if err := gl.Init(); err != nil {
panic(err)
}
window.SetKeyCallback(keyCallback)
// program loop
for !window.ShouldClose() {
// poll events and call their registered callbacks
glfw.PollEvents()
// perform rendering
gl.ClearColor(0.2, 0.5, 0.5, 1.0)
gl.Clear(gl.COLOR_BUFFER_BIT)
// swap in the rendered buffer
window.SwapBuffers()
}
}
func main() {
if err := glfw.Init(); err != nil {
log.Fatalln("failed to inifitialize glfw:", err)
}
defer glfw.Terminate()
glfw.WindowHint(glfw.Resizable, glfw.False)
glfw.WindowHint(glfw.ContextVersionMajor, 4)
glfw.WindowHint(glfw.ContextVersionMinor, 1)
glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
// Initialize Glow (go function bindings)
if err := gl.Init(); err != nil {
panic(err)
}
window := win.NewWindow(1280, 720, "Lighting maps")
err := programLoop(window)
if err != nil {
log.Fatalln(err)
}
}
/* ***************** MAIN FUNCTION ************************ */
func main() {
/* **************** OVR INIT CODE ***************** */
if err := glfw.Init(); err != nil {
log.Fatalln("failed to initialize glfw")
}
defer glfw.Terminate()
C.ovr_Initialize(nil)
//create an HMD for reference.
var hmd C.ovrHmd = nil
// find number of headsets
hmdCount := (int)(C.ovrHmd_Detect())
// print headset count
fmt.Println(hmdCount)
fmt.Printf("Found %d connected Rift device(s)\n\n", hmdCount)
// grab the first headset
if hmdCount > 0 {
for i := 0; i < 1; i++ {
hmd = C.ovrHmd_Create((C.int)(i))
//Print headset name
fmt.Println(C.GoString(hmd.ProductName))
}
}
//if there is no headset connected, create a new debug.
if hmd == nil {
fmt.Println("Unable to open rift device\n Creating debug device.\n")
hmd = C.ovrHmd_CreateDebug(C.ovrHmd_DK2)
}
//Starts the sensor device
if C.ovrHmd_ConfigureTracking(hmd, C.ovrTrackingCap_Orientation|C.ovrTrackingCap_Position, 0) == 0 {
fmt.Println("Unable to start Rift head tracker\n")
}
//extendedMode := C.ovrHmdCap_ExtendDesktop & hmd.HmdCaps
//positioning of window and size of window
var outposition mgl32.Vec2
outposition[0] = (float32)(hmd.WindowsPos.x)
outposition[1] = (float32)(hmd.WindowsPos.y)
//TODO: Change this to output at chosen resolution, not necessarily native pg. 76 Oculus Rift in action
var outsize mgl32.Vec2
outsize[0] = (float32)(hmd.Resolution.w)
outsize[1] = (float32)(hmd.Resolution.h)
//print position and sizes to console
fmt.Printf("Rift position:\t\t %f \t %f \nRift Size:\t\t %f \t %f \n\n", outposition.X(), outposition.Y(), outsize.X(), outsize.Y())
monitors := glfw.GetMonitors()
var riftIndex int
//loop over the monitors
for index, element := range monitors {
//print the monitor positions
posX, posY := element.GetPos()
fmt.Printf("Monitor Position:\t\t %d \t %d\n", posX, posY)
if float32(posX) == outposition.X() && float32(posY) == outposition.Y() {
riftIndex = index
}
}
//Get video mode of monitor
mode := monitors[riftIndex].GetVideoMode()
outsize[0] = float32(mode.Width)
outsize[1] = float32(mode.Height)
/* ***************************************************** */
// ************* OPENGL / GLFW INIT CODE ************** */
glfw.WindowHint(glfw.Decorated, 0)
glfw.WindowHint(glfw.Resizable, glfw.False)
glfw.WindowHint(glfw.ContextVersionMajor, 4)
glfw.WindowHint(glfw.ContextVersionMinor, 1)
glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
window, err := glfw.CreateWindow(int(outsize.X()), int(outsize.Y()), "LinuxVR", nil, nil)
window.SetPos(int(outposition.X()), int(outposition.Y()))
if gl.Init(); err != nil {
panic(err)
}
window.MakeContextCurrent()
//Print OpenGL Version to console
version := gl.GoStr(gl.GetString(gl.VERSION))
fmt.Println("OpenGL Version", version, "\n\n")
//keyboard input callback
window.SetKeyCallback(onKey)
/* **************************************************** */
previousTime := glfw.GetTime()
totalTime := 0.0000
/* ******************* MAIN LOOP ******************** */
for !window.ShouldClose() {
glfw.PollEvents()
//Update
time := glfw.GetTime()
elapsed := time - previousTime
previousTime = time
totalTime = totalTime + elapsed
//get current head state
state := C.ovrHmd_GetTrackingState(hmd, 0)
orientation := state.HeadPose.ThePose.Orientation
//convert to go type float32
var q mgl32.Quat
q.W = (float32)(orientation.w)
q.V[0] = (float32)(orientation.x)
q.V[1] = (float32)(orientation.y)
q.V[2] = (float32)(orientation.z)
//publish tracking information once a second
if totalTime >= 1 {
fmt.Printf("w: %f X: %f Y: %f Z: %f\n", q.W, q.X(), q.Y(), q.Z())
totalTime = 0
}
//basic opengl things
draw(window)
//Swap buffers
window.SwapBuffers()
//Poll for events (keyboard, resize, etc)
}
/* ***************** OVR SHUTDOWN ******************** */
C.ovrHmd_Destroy(hmd)
C.ovr_Shutdown()
}
func (renderer *Renderer) Loop() {
defer glog.Flush()
if err := glfw.Init(); err != nil {
glog.Fatalln("GLFW failed to initialize:", err)
glog.Info("GLFW failed to init")
}
glfw.WindowHint(glfw.ContextVersionMajor, 3)
glfw.WindowHint(glfw.ContextVersionMinor, 2)
glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
glfw.WindowHint(glfw.Resizable, glfw.False)
window, windowError := glfw.CreateWindow(800, 600, "OpenGL", nil, nil)
if windowError != nil {
glog.Info("oops")
panic(windowError)
}
glog.Info("Buffer")
defer func() {
window.Destroy()
glfw.Terminate()
glog.Info("ending")
renderer.ended = true
//system_end <- true
}()
window.MakeContextCurrent()
if err := gl.Init(); err != nil {
panic(err)
}
renderer.keyCallback = func(window *glfw.Window, key glfw.Key, scancode int, action glfw.Action, mods glfw.ModifierKey) {
glog.Infof("key: %v, scancode: %v, action: %v, mods: %v", key, scancode, action, mods)
}
window.SetKeyCallback(renderer.keyCallback)
//<-system_start
renderer.started = true
//system_started <- true
gl.ClearDepth(1.0)
var vboID uint32
gl.GenBuffers(1, &vboID)
var vertexData = []float32{
1, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 1,
}
gl.BindBuffer(gl.ARRAY_BUFFER, vboID)
gl.BufferData(gl.ARRAY_BUFFER, len(vertexData)*4, gl.Ptr(vertexData), gl.STATIC_DRAW)
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
//get shaders
vertexShader, fragmentShader := getShaders()
program, err := newProgram(vertexShader, fragmentShader)
program.UseProgram()
if err != nil {
panic(err)
}
//bind attributes
// L:
for !window.ShouldClose() {
//renderer.drawGame(program)
gl.EnableVertexAttribArray(0)
gl.BindBuffer(gl.ARRAY_BUFFER, vboID)
gl.VertexAttribPointer(
0,
3,
gl.FLOAT,
false,
0,
gl.PtrOffset(0))
gl.DrawArrays(gl.TRIANGLES, 0, 3)
gl.DisableVertexAttribArray(0)
window.SwapBuffers()
glfw.PollEvents()
}
if vboID != 0 {
gl.DeleteBuffers(1, &vboID)
}
}
func main() {
var parser = flags.NewParser(&gOpts, flags.Default)
var err error
var args []string
if args, err = parser.Parse(); err != nil {
os.Exit(1)
}
if len(args) < 1 || len(args) > 2 {
panic(fmt.Errorf("Too many or not enough arguments"))
}
gDiffFlag = len(args) == 2
// make sure that we display any errors that are encountered
//glfw.SetErrorCallback(errorCallback)
// the GLFW library has to be initialized before any of the methods
// can be invoked
if err = glfw.Init(); err != nil {
panic(err)
}
// to be tidy, make sure glfw.Terminate() is called at the end of
// the program to clean things up by using `defer`
defer glfw.Terminate()
// hints are the way you configure the features requested for the
// window and are required to be set before calling glfw.CreateWindow().
// desired number of samples to use for mulitsampling
//glfw.WindowHint(glfw.Samples, 4)
// request a OpenGL 4.1 core context
if runtime.GOOS == "darwin" {
glfw.WindowHint(glfw.ContextVersionMajor, 3)
glfw.WindowHint(glfw.ContextVersionMinor, 3)
} else {
glfw.WindowHint(glfw.ContextVersionMajor, 4)
glfw.WindowHint(glfw.ContextVersionMinor, 1)
}
glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
// do the actual window creation
var window *glfw.Window
window, err = glfw.CreateWindow(1024, 768, "goicmpgl", nil, nil)
if err != nil {
// we legitimately cannot recover from a failure to create
// the window in this sample, so just bail out
panic(err)
}
// set the callback function to get all of the key input from the user
window.SetKeyCallback(keyCallback)
window.SetMouseButtonCallback(mouseDownCallback)
window.SetScrollCallback(mouseWheelCallback)
window.SetCursorPosCallback(mouseMoveCallback)
// GLFW3 can work with more than one window, so make sure we set our
// new window as the current context to operate on
window.MakeContextCurrent()
// disable v-sync for max FPS if the driver allows it
//glfw.SwapInterval(0)
// make sure that GLEW initializes all of the GL functions
if err = gl.Init(); err != nil {
panic(err)
}
var attribs []string = []string{
"position",
"uvs",
}
// compile our shaders
var progTex0 *Program
if progTex0, err = LoadShaderProgram(vertShader, fragShaderTex0, attribs); err != nil {
panic(err)
}
defer progTex0.DeleteProgram()
var progGrid *Program
if progGrid, err = LoadShaderProgram(vertShader, S_FragmentShader_Grid, attribs); err != nil {
panic(err)
}
defer progGrid.DeleteProgram()
var diffProg2 *Program
if diffProg2, err = LoadShaderProgram(vertShader, sProgram2Src, attribs); err != nil {
panic(err)
}
defer diffProg2.DeleteProgram()
var diffProg3 *Program
if diffProg3, err = LoadShaderProgram(vertShader, sProgram3Src, attribs); err != nil {
panic(err)
}
defer diffProg3.DeleteProgram()
var diffProg4 *Program
if diffProg4, err = LoadShaderProgram(vertShader, sProgram4Src, attribs); err != nil {
panic(err)
}
defer diffProg4.DeleteProgram()
var diffProg5 *Program
if diffProg5, err = LoadShaderProgram(vertShader, sProgram5Src, attribs); err != nil {
panic(err)
}
defer diffProg5.DeleteProgram()
var image1_path string = args[0]
if strings.HasPrefix(image1_path, "http") {
if err, image1_path = downloadImage(image1_path); err != nil {
panic(err)
}
}
var texture *Texture
if err, texture, gImage1 = NewTexture(image1_path, false); err != nil {
panic(err)
}
defer texture.DeleteTexture()
var texture2 *Texture
if gDiffFlag {
var image2_path string = args[1]
if strings.HasPrefix(image2_path, "http") {
if err, image2_path = downloadImage(image2_path); err != nil {
panic(err)
}
}
if err, texture2, gImage2 = NewTexture(image2_path, false); err != nil {
panic(err)
}
defer texture2.DeleteTexture()
if texture.Size.X != texture2.Size.X || texture.Size.Y != texture2.Size.Y {
fmt.Println("WARNING: image dimensions differ!")
} else {
fmt.Printf("image dimensions: %dx%d\n", texture.Size.X, texture.Size.Y)
}
} else {
fmt.Printf("image dimensions: %dx%d\n", texture.Size.X, texture.Size.Y)
}
var font *Font
if err, font = NewFont("Font.png", 16); err != nil {
panic(err)
}
defer font.DeleteFont()
var help1 *String = font.NewString("1: show only A")
defer help1.DeleteString()
var help2 *String = font.NewString("2: show only B")
defer help2.DeleteString()
var help3 *String = font.NewString("3: show diff A&B")
defer help3.DeleteString()
var helph *String = font.NewString("h: toggle this help")
defer helph.DeleteString()
var helparrows *String = font.NewString("<up>,<down>: go from A to B")
defer helparrows.DeleteString()
var helpzoom *String = font.NewString("[]: zoom in/out (also mouse wheel)")
defer helpzoom.DeleteString()
var helpclear *String = font.NewString("Z: reset zoom/view")
defer helpclear.DeleteString()
var helpescape *String = font.NewString("ESC: quit")
defer helpescape.DeleteString()
var vbo *VBO
if vbo, err = NewVBOQuad(0, 0, float32(texture.Size.X), float32(texture.Size.Y)); err != nil {
panic(err)
}
defer vbo.DeleteVBO()
var cnt float32 = 0
// while there's no request to close the window
for !window.ShouldClose() {
cnt += 1
// get the texture of the window because it may have changed since creation
width, height := window.GetFramebufferSize()
wwidth, _ := window.GetSize()
gRetinaScale = float32(width) / float32(wwidth)
//fmt.Printf("x=%d y=%d wx=%d wy=%d\n", width, height, wwidth, wheight)
if cnt >= float32(width) {
cnt = 0
}
var matrix Matrix2x3 = IdentityMatrix2x3()
matrix = matrix.Translate(-1.0, 1.0)
matrix = matrix.Scale(2.0/float32(width), -2.0/float32(height))
// clear it all out
gl.Viewport(0, 0, int32(width), int32(height))
gl.ClearColor(0.0, 0.0, 0.0, 1.0)
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA)
gl.BlendEquation(gl.FUNC_ADD)
var matrix3 Matrix2x3 = matrix.Scale(gZoom, gZoom)
matrix3 = matrix3.Translate(gOffX, gOffY)
// draw the grid
if true {
vbo.Bind()
progGrid.UseProgram()
color1 := [4]float32{.4, .4, .4, 1}
color2 := [4]float32{.9, .9, .9, 1}
grid := [3]float32{float32(texture.Size.X), float32(texture.Size.Y), 8 / gZoom}
//fmt.Printf("%.2f %.2f %.2f %.2f\n", grid[0], grid[1], grid[2], grid[3])
progGrid.ProgramUniformMatrix4fv("ModelviewMatrix", matrix3.Array())
progGrid.ProgramUniform4fv("color1", color1)
progGrid.ProgramUniform4fv("color2", color2)
progGrid.ProgramUniform3fv("grid", grid)
if err = progGrid.ValidateProgram(); err != nil {
panic(err)
}
vbo.Draw()
vbo.Unbind()
progGrid.UnuseProgram()
}
// draw the texture
if !gDiffFlag {
vbo.Bind()
progTex0.UseProgram()
texture.BindTexture(0)
progTex0.ProgramUniformMatrix4fv("ModelviewMatrix", matrix3.Array())
progTex0.ProgramUniform1i("tex1", 0)
progTex0.ProgramUniform1f("blend", gBlend)
if err = progTex0.ValidateProgram(); err != nil {
panic(err)
}
vbo.Draw()
vbo.Unbind()
progTex0.UnuseProgram()
texture.UnbindTexture(0)
} else {
var diffBlend float32 = gBlend
var diffProg *Program
if diffBlend < 0.25 {
diffBlend *= 4
diffProg = diffProg2
} else if diffBlend < 0.5 { // 0.25 -> 0.5
diffBlend = 4*diffBlend - 1
diffProg = diffProg4
} else if diffBlend < 0.75 { // 0.5 -> 0.75
diffBlend = 4*diffBlend - 2
diffProg = diffProg5
} else { // 0.75 -> 1.0=
diffBlend = 4*diffBlend - 3
diffProg = diffProg3
}
vbo.Bind()
diffProg.UseProgram()
texture.BindTexture(0)
texture2.BindTexture(1)
diffProg.ProgramUniformMatrix4fv("ModelviewMatrix", matrix3.Array())
diffProg.ProgramUniform1i("decalA", 0)
diffProg.ProgramUniform1i("decalB", 1)
diffProg.ProgramUniform1f("diffBlend", diffBlend)
if err = diffProg.ValidateProgram(); err != nil {
panic(err)
}
vbo.Draw()
vbo.Unbind()
diffProg.UnuseProgram()
texture.UnbindTexture(0)
texture2.UnbindTexture(1)
}
// font
if gHelp {
color := [...]float32{0, 0, 1, 1}
bg := [...]float32{0.5, 0.5, 0.5, 0.5}
var line float32 = 0
if err = helph.Draw(font, color, bg, matrix, 0.5, 20, 100+line*128); err != nil {
panic(err)
}
line += 1
help1.Draw(font, color, bg, matrix, 0.5, 20, 100+line*128)
line += 1
help2.Draw(font, color, bg, matrix, 0.5, 20, 100+line*128)
line += 1
help3.Draw(font, color, bg, matrix, 0.5, 20, 100+line*128)
line += 1
helparrows.Draw(font, color, bg, matrix, 0.5, 20, 100+line*128)
line += 1
helpzoom.Draw(font, color, bg, matrix, 0.5, 20, 100+line*128)
line += 1
helpclear.Draw(font, color, bg, matrix, 0.5, 20, 100+line*128)
line += 1
helpescape.Draw(font, color, bg, matrix, 0.5, 20, 100+line*128)
line += 1
}
// swapping OpenGL buffers and polling events has been decoupled
// in GLFW3, so make sure to invoke both here
window.SwapBuffers()
glfw.PollEvents()
}
}
func main() {
if err := glfw.Init(); err != nil {
log.Fatalln("failed to initialize glfw:", err)
}
defer glfw.Terminate()
glfw.WindowHint(glfw.Resizable, glfw.False)
glfw.WindowHint(glfw.ContextVersionMajor, 4)
glfw.WindowHint(glfw.ContextVersionMinor, 1)
glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
window, err := glfw.CreateWindow(windowWidth, windowHeight, "Cube", nil, nil)
if err != nil {
panic(err)
}
window.MakeContextCurrent()
// Initialize Glow
if err := gl.Init(); err != nil {
panic(err)
}
version := gl.GoStr(gl.GetString(gl.VERSION))
fmt.Println("OpenGL version", version)
// Configure the vertex and fragment shaders
program, err := newProgram(vertexShader, fragmentShader)
if err != nil {
panic(err)
}
gl.UseProgram(program)
projection := mgl32.Perspective(mgl32.DegToRad(45.0), float32(windowWidth)/windowHeight, 0.1, 10.0)
projectionUniform := gl.GetUniformLocation(program, gl.Str("projection\x00"))
gl.UniformMatrix4fv(projectionUniform, 1, false, &projection[0])
camera := mgl32.LookAtV(mgl32.Vec3{3, 3, 3}, mgl32.Vec3{0, 0, 0}, mgl32.Vec3{0, 1, 0})
cameraUniform := gl.GetUniformLocation(program, gl.Str("camera\x00"))
gl.UniformMatrix4fv(cameraUniform, 1, false, &camera[0])
model := mgl32.Ident4()
modelUniform := gl.GetUniformLocation(program, gl.Str("model\x00"))
gl.UniformMatrix4fv(modelUniform, 1, false, &model[0])
textureUniform := gl.GetUniformLocation(program, gl.Str("tex\x00"))
gl.Uniform1i(textureUniform, 0)
gl.BindFragDataLocation(program, 0, gl.Str("outputColor\x00"))
// Load the texture
texture, err := newTexture("square.png")
if err != nil {
panic(err)
}
// Configure the vertex data
var vao uint32
gl.GenVertexArrays(1, &vao)
gl.BindVertexArray(vao)
var vbo uint32
gl.GenBuffers(1, &vbo)
gl.BindBuffer(gl.ARRAY_BUFFER, vbo)
gl.BufferData(gl.ARRAY_BUFFER, len(cubeVertices)*4, gl.Ptr(cubeVertices), gl.STATIC_DRAW)
vertAttrib := uint32(gl.GetAttribLocation(program, gl.Str("vert\x00")))
gl.EnableVertexAttribArray(vertAttrib)
gl.VertexAttribPointer(vertAttrib, 3, gl.FLOAT, false, 5*4, gl.PtrOffset(0))
texCoordAttrib := uint32(gl.GetAttribLocation(program, gl.Str("vertTexCoord\x00")))
gl.EnableVertexAttribArray(texCoordAttrib)
gl.VertexAttribPointer(texCoordAttrib, 2, gl.FLOAT, false, 5*4, gl.PtrOffset(3*4))
// Configure global settings
gl.Enable(gl.DEPTH_TEST)
gl.DepthFunc(gl.LESS)
gl.ClearColor(1.0, 1.0, 1.0, 1.0)
angle := 0.0
previousTime := glfw.GetTime()
for !window.ShouldClose() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
// Update
time := glfw.GetTime()
elapsed := time - previousTime
previousTime = time
angle += elapsed
model = mgl32.HomogRotate3D(float32(angle), mgl32.Vec3{0, 1, 0})
// Render
gl.UseProgram(program)
gl.UniformMatrix4fv(modelUniform, 1, false, &model[0])
gl.BindVertexArray(vao)
gl.ActiveTexture(gl.TEXTURE0)
gl.BindTexture(gl.TEXTURE_2D, texture)
gl.DrawArrays(gl.TRIANGLES, 0, 6*2*3)
// Maintenance
window.SwapBuffers()
glfw.PollEvents()
}
}
//Start -
func (glRenderer *OpenglRenderer) Start() {
if err := glfw.Init(); err != nil {
log.Fatalln("failed to initialize glfw:", err)
}
defer glfw.Terminate()
glfw.WindowHint(glfw.Resizable, glfw.False)
glfw.WindowHint(glfw.ContextVersionMajor, 4)
glfw.WindowHint(glfw.ContextVersionMinor, 1)
glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
if glRenderer.FullScreen {
glRenderer.WindowWidth = glfw.GetPrimaryMonitor().GetVideoMode().Width
} else if glRenderer.WindowWidth == 0 {
glRenderer.WindowWidth = glfw.GetPrimaryMonitor().GetVideoMode().Width * 95 / 100
}
if glRenderer.FullScreen {
glRenderer.WindowHeight = glfw.GetPrimaryMonitor().GetVideoMode().Height
} else if glRenderer.WindowHeight == 0 {
glRenderer.WindowHeight = glfw.GetPrimaryMonitor().GetVideoMode().Height * 95 / 100
}
var monitor *glfw.Monitor
if glRenderer.FullScreen {
monitor = glfw.GetPrimaryMonitor()
}
window, err := glfw.CreateWindow(glRenderer.WindowWidth, glRenderer.WindowHeight, glRenderer.WindowTitle, monitor, nil)
if err != nil {
panic(err)
}
window.MakeContextCurrent()
glRenderer.Window = window
// Initialize Glow
if err := gl.Init(); err != nil {
panic(err)
}
var vao uint32
gl.GenVertexArrays(1, &vao)
gl.BindVertexArray(vao)
gl.Enable(gl.TEXTURE_CUBE_MAP_SEAMLESS)
gl.Enable(gl.BLEND)
gl.DepthFunc(gl.LEQUAL)
gl.CullFace(gl.BACK)
glRenderer.initPostEffects()
glRenderer.onInit()
window.SetRefreshCallback(func(w *glfw.Window) {
glRenderer.mainLoop()
window.SwapBuffers()
})
//Main loop
for !window.ShouldClose() {
glRenderer.mainLoop()
window.SwapBuffers()
glfw.PollEvents()
}
}
func Main() {
err := glfw.Init()
if err != nil {
panic(err)
}
defer glfw.Terminate()
glfw.WindowHint(glfw.Resizable, glfw.False)
glfw.WindowHint(glfw.ContextVersionMajor, 3)
glfw.WindowHint(glfw.ContextVersionMinor, 2)
glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
window, err := glfw.CreateWindow(WindowWidth, WindowHeight, "Cube", nil, nil)
Window = window
if err != nil {
panic(err)
}
window.MakeContextCurrent()
// Initialize Glow
if err := gl.Init(); err != nil {
panic(err)
}
version := gl.GoStr(gl.GetString(gl.VERSION))
fmt.Println("OpenGL version", version)
// Configure the vertex and fragment shaders
program, err := newProgram("SimpleVertexShader.vertexshader", "SimpleFragmentShader.fragmentshader")
if err != nil {
panic(err)
}
gl.UseProgram(program)
projection := mgl32.Perspective(mgl32.DegToRad(45.0), float32(WindowWidth)/WindowHeight, 0.1, 10.0)
projectionUniform := gl.GetUniformLocation(program, gl.Str("projection\x00"))
gl.UniformMatrix4fv(projectionUniform, 1, false, &projection[0])
camera := mgl32.LookAtV(mgl32.Vec3{3, 3, 3}, mgl32.Vec3{0, 0, 0}, mgl32.Vec3{0, 1, 0})
cameraUniform := gl.GetUniformLocation(program, gl.Str("camera\x00"))
gl.UniformMatrix4fv(cameraUniform, 1, false, &camera[0])
model := mgl32.Ident4()
modelUniform := gl.GetUniformLocation(program, gl.Str("model\x00"))
gl.UniformMatrix4fv(modelUniform, 1, false, &model[0])
textureUniform := gl.GetUniformLocation(program, gl.Str("tex\x00"))
gl.Uniform1i(textureUniform, 0)
gl.BindFragDataLocation(program, 0, gl.Str("outputColor\x00"))
// Configure global settings
gl.Enable(gl.DEPTH_TEST)
gl.DepthFunc(gl.LESS)
gl.ClearColor(1.0, 1.0, 1.0, 1.0)
angle := 0.0
previousTime := glfw.GetTime()
width, height := window.GetSize()
window.SetCursorPos(float64(width/2), float64(height/2))
window.SetKeyCallback(input.OnKey)
window.SetCursorPosCallback(input.OnCursor)
window.SetMouseButtonCallback(input.OnMouse)
meshes.LoadColladaCube("cube.dae")
for !player.ShouldClose {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
// Update
time := glfw.GetTime()
elapsed := time - previousTime
previousTime = time
angle += elapsed
model = mgl32.HomogRotate3D(float32(angle), mgl32.Vec3{0, 1, 0})
// Render
gl.UseProgram(program)
// gl.UniformMatrix4fv(modelUniform, 1, false, &model[0])
player.MainPlayer.Draw(program)
for _, element := range game.Universe {
(element).Draw(program)
}
// Maintenance
window.SwapBuffers()
glfw.PollEvents()
}
}