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()
}
}
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() {
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 Run() {
running = true
for running {
start := time.Now()
escPressed := glfw.Key(glfw.KeyEsc)
windowOpen := glfw.WindowParam(glfw.Opened)
running = escPressed == 0 && windowOpen == 1
select {
case data := <-ScreenOutputChan:
drawFrame(data.Pixels)
drawInfoBox(3, 3, 12, data.IterNr, data.NThreads, data.ExecTime)
glfw.SwapBuffers()
default: // Non blocking!
glfw.PollEvents()
}
// Limit to 60hz
elapsed := time.Since(start)
timeToSleep := 16*time.Millisecond - elapsed
if timeToSleep > 0 {
time.Sleep(timeToSleep)
}
}
}
func main() {
var err error
var looping = true
defer fmt.Println("EXIT")
if err = glfw.Init(); err != nil {
panic(err)
}
defer glfw.Terminate()
glfw.OpenWindowHint(glfw.FsaaSamples, 0)
if useStrictCoreProfile {
glfw.OpenWindowHint(glfw.OpenGLVersionMajor, 3)
glfw.OpenWindowHint(glfw.OpenGLVersionMinor, 2)
glfw.OpenWindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
}
if err = glfw.OpenWindow(1280, 720, 8, 8, 8, 0, 24, 8, glfw.Windowed); err != nil {
panic(err)
}
defer glfw.CloseWindow()
glfw.Enable(glfw.StickyKeys)
if !gl.Util.Init() {
panic("Failed to initialize at least OpenGL 3.2 or higher.")
}
defer logLastGlError("(post loop)")
gl.ClearColor(0.3, 0.1, 0.0, 1.0)
gl.Enable(gl.DEPTH_TEST)
gl.FrontFace(gl.CCW)
gl.CullFace(gl.BACK)
gl.Disable(gl.CULL_FACE)
if err = compileShaders(); err != nil {
panic(err)
}
setupGeometry()
defer deleteGeometry()
logLastGlError("(pre loop)")
for looping {
gl.UseProgram(shaderProg)
if isFirstLoop {
logLastGlError("gl.UseProgram")
}
gl.Viewport(0, 0, 1280, 720)
if isFirstLoop {
logLastGlError("gl.ViewPort")
}
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
if isFirstLoop {
logLastGlError("gl.Clear")
}
renderGeometry(faceTri)
if isFirstLoop {
logLastGlError("renderGeometry(faceTri)")
}
renderGeometry(faceQuad)
if isFirstLoop {
logLastGlError("renderGeometry(faceQuad)")
}
if (glfw.WindowParam(glfw.Opened) != 1) || (glfw.Key(glfw.KeyEsc) == glfw.KeyPress) {
looping = false
} else {
glfw.SwapBuffers()
}
isFirstLoop = false
}
logLastGlError("post-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
}
}
// Check whether a key is pressed.
func (c *Controller) Key(key int) int {
return glfw.Key(key)
}
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
}
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 04")
glfw.Enable(glfw.StickyKeys)
gl.ClearColor(0., 0., 0.4, 0.)
gl.Enable(gl.DEPTH_TEST)
gl.DepthFunc(gl.LESS)
vertexArray := gl.GenVertexArray()
defer vertexArray.Delete()
vertexArray.Bind()
prog := helper.MakeProgram("TransformVertexShader.vertexshader", "ColorFragmentShader.fragmentshader")
defer prog.Delete()
matrixID := prog.GetUniformLocation("MVP")
Projection := mathgl.Perspective(45.0, 4.0/3.0, 0.1, 100.0)
View := mathgl.LookAt(4.0, 3.0, -3.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0)
Model := mathgl.Ident4f()
MVP := Projection.Mul4(View).Mul4(Model) // Remember, transform multiplication order is "backwards"
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}
colorBufferData := [...]float32{
0.583, 0.771, 0.014,
0.609, 0.115, 0.436,
0.327, 0.483, 0.844,
0.822, 0.569, 0.201,
0.435, 0.602, 0.223,
0.310, 0.747, 0.185,
0.597, 0.770, 0.761,
0.559, 0.436, 0.730,
0.359, 0.583, 0.152,
0.483, 0.596, 0.789,
0.559, 0.861, 0.639,
0.195, 0.548, 0.859,
0.014, 0.184, 0.576,
0.771, 0.328, 0.970,
0.406, 0.615, 0.116,
0.676, 0.977, 0.133,
0.971, 0.572, 0.833,
0.140, 0.616, 0.489,
0.997, 0.513, 0.064,
0.945, 0.719, 0.592,
0.543, 0.021, 0.978,
0.279, 0.317, 0.505,
0.167, 0.620, 0.077,
0.347, 0.857, 0.137,
0.055, 0.953, 0.042,
0.714, 0.505, 0.345,
0.783, 0.290, 0.734,
0.722, 0.645, 0.174,
0.302, 0.455, 0.848,
0.225, 0.587, 0.040,
0.517, 0.713, 0.338,
0.053, 0.959, 0.120,
0.393, 0.621, 0.362,
0.673, 0.211, 0.457,
0.820, 0.883, 0.371,
0.982, 0.099, 0.879}
//elBufferData := [...]uint8{0, 1, 2} // Not sure why this is here
vertexBuffer := gl.GenBuffer()
defer vertexBuffer.Delete()
vertexBuffer.Bind(gl.ARRAY_BUFFER)
gl.BufferData(gl.ARRAY_BUFFER, len(vBufferData)*4, &vBufferData, gl.STATIC_DRAW)
colorBuffer := gl.GenBuffer()
defer colorBuffer.Delete()
colorBuffer.Bind(gl.ARRAY_BUFFER)
gl.BufferData(gl.ARRAY_BUFFER, len(colorBufferData)*4, &colorBufferData, 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 | gl.DEPTH_BUFFER_BIT)
prog.Use()
matrixID.UniformMatrix4fv(false, MVP)
vertexAttrib := gl.AttribLocation(0)
vertexAttrib.EnableArray()
vertexBuffer.Bind(gl.ARRAY_BUFFER)
vertexAttrib.AttribPointer(3, gl.FLOAT, false, 0, nil)
colorAttrib := gl.AttribLocation(1)
colorAttrib.EnableArray()
colorBuffer.Bind(gl.ARRAY_BUFFER)
colorAttrib.AttribPointer(3, gl.FLOAT, false, 0, nil)
gl.DrawArrays(gl.TRIANGLES, 0, 12*3)
vertexAttrib.DisableArray()
colorAttrib.DisableArray()
glfw.SwapBuffers()
}
}
// Returns true if the specified key is pressed.
func (_ *NgUserIO) KeyPressed(key int) bool {
return glfw.Key(key) == glfw.KeyPress
}
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.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 glewExperimental
glfw.SetWindowTitle("Tutorial 05")
glfw.Enable(glfw.StickyKeys)
gl.ClearColor(0., 0., 0.4, 0.)
gl.Enable(gl.DEPTH_TEST)
gl.DepthFunc(gl.LESS)
vertexArray := gl.GenVertexArray()
defer vertexArray.Delete()
vertexArray.Bind()
prog := helper.MakeProgram("TransformVertexShader.vertexshader", "TextureFragmentShader.fragmentshader")
defer prog.Delete()
matrixID := prog.GetUniformLocation("MVP")
Projection := mathgl.Perspective(45.0, 4.0/3.0, 0.1, 100.0)
View := mathgl.LookAt(4.0, 3.0, 3.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0)
Model := mathgl.Ident4f()
MVP := Projection.Mul4(View).Mul4(Model) // Remember, transform multiplication order is "backwards"
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) {
func() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
prog.Use()
defer gl.ProgramUnuse()
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 (me *window) Key(key int) int {
return glfw.Key(key)
}
func (s *System) CheckExitMainLoop() bool {
return (glfw.Key(glfw.KeyEsc) != glfw.KeyPress && glfw.WindowParam(glfw.Opened) == gl.TRUE)
}
func IsKeyDown(key int) bool {
return glfw.Key(key) == glfw.KeyPress
}
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 03")
glfw.Enable(glfw.StickyKeys)
gl.ClearColor(0., 0., 0.4, 0.)
vertexArray := gl.GenVertexArray()
defer vertexArray.Delete()
vertexArray.Bind()
prog := helper.MakeProgram("SimpleTransform.vertexshader", "SingleColor.fragmentshader")
defer prog.Delete()
matrixID := prog.GetUniformLocation("MVP")
Projection := mathgl.Perspective(45.0, 4.0/3.0, 0.1, 100.0)
//Projection := mathgl.Identity(4,mathgl.FLOAT64)
//Projection := mathgl.Ortho2D(-5,5,-5,5)
View := mathgl.LookAt(4.0, 3.0, 3.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0)
//View := mathgl.Identity(4,mathgl.FLOAT64)
Model := mathgl.Ident4f()
//Model := mathgl.Scale3D(2.,2.,2.).Mul(mathgl.HomogRotate3DX(25.0)).Mul(mathgl.Translate3D(.5,.2,-.7))
MVP := Projection.Mul4(View).Mul4(Model) // Remember, transform multiplication order is "backwards"
vBufferData := [...]float32{
-1., -1., 0.,
1., -1., 0.,
0., 1., 0.}
//elBufferData := [...]uint8{0, 1, 2} // Not sure why this is here
buffer := gl.GenBuffer()
defer buffer.Delete()
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()
matrixID.UniformMatrix4fv(false, MVP)
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 (s *Sys) stepCycle() error {
// TODO(nictuku): Show CPU tracer on video.
draw := false
// pc points to next opcode.
opcode := uint16(s.mem[s.PC])<<8 | uint16(s.mem[s.PC+1])
// defer log.Printf("opcode 0x%04x", opcode)
// defer log.Printf("cycle result:\n%v", s.String())
x := byte((opcode & 0x0F00) >> 8)
y := byte((opcode & 0x00F0) >> 4)
switch opcode & 0xF000 {
case 0x0000:
if opcode&0xFF00 != 0x0000 {
// 0NNN Calls RCA 1802 program at address NNN.
// => Only used by the original computers that implemented CHIP-8.
goto NOTIMPLEMENTED
}
switch opcode & 0x000F {
case 0x0000:
// 00E0 Clears the screen.
s.gfx = make([]byte, screenWidth*screenHeight)
draw = true
default:
// 00EE Returns from a subroutine.
if s.SP <= 0 {
return fmt.Errorf("stack bottom")
}
s.PC = s.stack[s.SP]
s.SP--
}
case 0x1000:
// 1NNN Jumps to address NNN.
s.PC = opcode & 0x0FFF
goto SKIPINC
case 0x2000:
// 2NNN Calls subroutine at NNN.
if s.SP >= 15 {
return fmt.Errorf("stack exhausted")
}
s.SP++
s.stack[s.SP] = s.PC
s.PC = opcode & 0x0FFF
goto SKIPINC
case 0x3000:
// 3XNN Skips the next instruction if VX equals NN.
// Weird type mistmatch. Expected?
if uint16(s.V[x]) == opcode&0xFF {
s.PC += 2
}
case 0x4000:
// 4XNN Skips the next instruction if VX doesn't equal NN.
if s.V[x] != byte(opcode&0xFF) {
// Skip next.
s.PC += 2
}
case 0x5000:
// 5XY0 Skips the next instruction if VX equals VY.
if s.V[x] == s.V[y] {
s.PC += 2
}
case 0x6000:
// 6XNN Sets VX to NN.
s.V[x] = byte(opcode & 0x00FF)
case 0x7000:
// 7XNN Adds NN to VX.
s.V[x] += byte(opcode & 0x00FF)
case 0x8000:
switch opcode & 0x000F {
case 0x0000:
// 8XY0 Sets VX to the value of VY.
s.V[x] = s.V[y]
case 0x0001:
// 8XY1 Sets VX to VX or VY.
s.V[x] = s.V[x] | s.V[y]
case 0x0002:
// 8XY2 Sets VX to VX and VY.
s.V[x] = s.V[x] & s.V[y]
case 0x0003:
// 8XY3 Sets VX to VX xor VY.
s.V[x] = s.V[x] ^ s.V[y]
case 0x0004:
// 8XY4 Adds VY to VX. VF is set to 1 when there's a carry, and to 0 when there isn't.
add := s.V[x] + s.V[y]
s.V[x] = add & 0xFF
s.V[0xF] = (add >> 8) & 0x1
case 0x0005:
// 8XY5 VY is subtracted from VX. VF is set to 0 when there's a borrow, and 1 when there isn't.
sub := s.V[x] - s.V[y]
if sub < 0 {
sub = 0
s.V[0xF] = 0
} else {
s.V[0xF] = 1
}
s.V[x] = sub
default:
goto NOTIMPLEMENTED
}
// 8XY6 Shifts VX right by one. VF is set to the value of the least significant bit of VX before the shift.[2]
// 8XY7 Sets VX to VY minus VX. VF is set to 0 when there's a borrow, and 1 when there isn't.
// 8XYE Shifts VX left by one. VF is set to the value of the most significant bit of VX before the shift.[2]
case 0x9000:
// 9XY0 Skips the next instruction if VX doesn't equal VY.
if s.V[x] != s.V[y] {
s.PC += 2
}
case 0xA000:
// ANNN Sets I to the address NNN.
s.I = opcode & 0x0FFF
// BNNN Jumps to the address NNN plus V0.
case 0xC000:
// CXNN Sets VX to a random number and NN.
s.V[x] = byte(uint16(rand.Int()) & opcode & 0x0FF)
case 0xD000:
// DXYN Draws a sprite at coordinate (VX, VY) that has a width of 8
// pixels and a height of N pixels. Each row of 8 pixels is read as
// bit-coded (with the most significant bit of each byte displayed on
// the left) starting from memory location I; I value doesn't change
// after the execution of this instruction.
// Based on the implementation from:
// http://www.multigesture.net
var pixel byte
x := uint16(s.V[(opcode&0x0F00)>>8])
y := uint16(s.V[(opcode&0x00F0)>>4])
height := uint16(opcode & 0x000F)
s.V[0xF] = 0
// yline+y < screenHeight was added later, to prevent out of range offsets.
for yline := uint16(0); yline < height && yline+y < screenHeight; yline++ {
pixel = s.mem[s.I+yline]
for xline := uint16(0); xline < 8; xline++ {
if (pixel & (0x80 >> xline)) != 0 {
offset := (x + xline + ((y + yline) * screenWidth))
if s.gfx[offset] == 1 {
// VF is set to 1 if any screen pixels are flipped from
// set to unset when the sprite is drawn, and to 0 if
// that doesn't happen.
s.V[0xF] = 1
}
s.gfx[offset] ^= 1
}
}
}
draw = true
case 0xE000:
switch opcode & 0x00FF {
case 0x00A1:
// EXA1 Skips the next instruction if the key stored in VX isn't pressed.
// TODO(nictuku): Implement keyboard events.
if (s.key[s.V[x]]) == false {
s.PC += 2
}
// goto NOTIMPLEMENTED
case 0x009E:
// EX9E Skips the next instruction if the key stored in VX is pressed.
// TODO(nictuku): Implement keyboard events.
// goto NOTIMPLEMENTED
// s.PC += 2
if (s.key[s.V[x]]) == true {
s.PC += 2
}
default:
goto NOTIMPLEMENTED
}
case 0xF000:
switch opcode & 0x00FF {
case 0x000A:
// FX0A A key press is awaited, and then stored in VX.
// notifyKeyEvent.
L:
for {
glfw.WaitEvents()
for i, k := range keyMap {
panic(fmt.Sprintf("resulting value %x", k))
if glfw.Key(int(k)) == glfw.KeyPress {
s.key[i] = true
s.V[x] = k
break L
}
s.key[i] = false
}
}
case 0x0007:
// FX07 Sets VX to the value of the delay timer.
s.V[x] = s.DelayTimer
case 0x0015:
// FX15 Sets the delay timer to VX.
s.DelayTimer = s.V[x]
case 0x0018:
// FX18 Sets the sound timer to VX.
s.SoundTimer = s.V[x]
case 0x001E:
// FX1E Adds VX to I.
// VF is set to 1 when range overflow (I+VX>0xFFF), and 0 when
// there isn't. This is undocumented feature of the Chip-8 and used
// by Spacefight 2019! game.
add := s.I + uint16(s.V[x])
if add > s.I {
s.V[0xF] = 0x0
} else {
s.V[0xF] = 0x1
}
s.I = add
case 0x0029:
// FX29 Sets I to the location of the sprite for the character in VX. Characters 0-F (in hexadecimal) are represented by a 4x5 font.
s.I = 0x50 + uint16(s.V[x])*4 // XXX assuming fontset at the beginning of memory.
case 0x0033:
// FX33 Stores the Binary-coded decimal representation of VX, with
// the most significant of three digits at the address in I, the
// middle digit at I plus 1, and the least significant digit at I
// plus 2.
s.mem[s.I] = byte(s.V[x] / 100 % 10)
s.mem[s.I+1] = byte(s.V[x] / 10 % 10)
s.mem[s.I+2] = byte(s.V[x] % 10)
case 0x0055:
// FX55 Stores V0 to VX in memory starting at address I.
// On the original interpreter, when the operation is done, I=I+X+1
for i, reg := range s.V[0:x] {
m := s.I + uint16(i)
s.mem[m] = reg
}
s.I = +uint16(x + 1)
case 0x0065:
// FX65 Fills V0 to VX with values from memory starting at address I.
for i := uint16(0); i <= uint16(x); i++ {
s.V[i] = s.mem[s.I+i]
}
/*
// Debugging.
for i, b := range s.mem {
fmt.Printf("%2x ", b)
if i > 1 && i % 20 == 0 {
fmt.Printf("\n%x\n", i)
}
}
*/
default:
goto NOTIMPLEMENTED
}
default:
goto NOTIMPLEMENTED
}
// Common case.
s.PC += 2
SKIPINC:
if s.DelayTimer > 0 {
s.DelayTimer -= 1
}
if s.SoundTimer > 0 {
if s.SoundTimer == 1 {
log.Println("BEEP!")
}
s.SoundTimer -= 1
}
if draw {
s.video.draw(s.gfx)
}
return nil
NOTIMPLEMENTED:
return fmt.Errorf("opcode not implemented: %x", opcode)
}
// Since go has multiple return values, I just went ahead and made it return the view and perspective matrices (in that order) rather than messing with getter methods
func (c *Camera) ComputeViewPerspective() (mathgl.Mat4f, mathgl.Mat4f) {
if mathgl.FloatEqual(-1.0, c.time) {
c.time = glfw.Time()
}
currTime := glfw.Time()
deltaT := currTime - c.time
xPos, yPos := glfw.MousePos()
glfw.SetMousePos(width/2.0, height/2.0)
c.hAngle += mouseSpeed * ((width / 2.0) - float64(xPos))
c.vAngle += mouseSpeed * ((height / 2.0) - float64(yPos))
dir := mathgl.Vec3f{
float32(math.Cos(c.vAngle) * math.Sin(c.hAngle)),
float32(math.Sin(c.vAngle)),
float32(math.Cos(c.vAngle) * math.Cos(c.hAngle))}
right := mathgl.Vec3f{
float32(math.Sin(c.hAngle - math.Pi/2.0)),
0.0,
float32(math.Cos(c.hAngle - math.Pi/2.0))}
up := right.Cross(dir)
if glfw.Key(glfw.KeyUp) == glfw.KeyPress || glfw.Key('W') == glfw.KeyPress {
c.pos = c.pos.Add(dir.Mul(float32(deltaT * speed)))
}
if glfw.Key(glfw.KeyDown) == glfw.KeyPress || glfw.Key('S') == glfw.KeyPress {
c.pos = c.pos.Sub(dir.Mul(float32(deltaT * speed)))
}
if glfw.Key(glfw.KeyRight) == glfw.KeyPress || glfw.Key('D') == glfw.KeyPress {
c.pos = c.pos.Add(right.Mul(float32(deltaT * speed)))
}
if glfw.Key(glfw.KeyLeft) == glfw.KeyPress || glfw.Key('A') == glfw.KeyPress {
c.pos = c.pos.Sub(right.Mul(float32(deltaT * speed)))
}
// Adding to the original tutorial, Space goes up
if glfw.Key(glfw.KeySpace) == glfw.KeyPress {
c.pos = c.pos.Add(up.Mul(float32(deltaT * speed)))
}
// Adding to the original tutorial, left control goes down
if glfw.Key(glfw.KeyLctrl) == glfw.KeyPress {
c.pos = c.pos.Sub(up.Mul(float32(deltaT * speed)))
}
fov := initialFOV - 5.0*float64(glfw.MouseWheel())
proj := mathgl.Perspective(fov, 4.0/3.0, 0.1, 100.0)
view := mathgl.LookAtV(c.pos, c.pos.Add(dir), up)
c.time = currTime
return view, proj
}
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
}
}