Akbir Khan akbir

## install_python.sh
PYTHON_CONFIGURE_OPTS="--enable-framework" CFLAGS="-I$(brew --prefix xz)/include" LDFLAGS="-L$(brew --prefix xz)/lib" pyenv install 3.8.11

## render_multiple_thread_bug.go
render(){
    // ...
    // set up worker group
    var wg sync.WaitGroup

    for thread := 0; thread < NumThreads; thread++{
        wg.Add(1)
        go func(offset int){

            for pixel := offset; pixel < width; pixel +=NumThreads {

## rand.go
// line 293
var globalRand = New(&lockedSource{src: NewSource(1).(*rngSource)})

## sample_bug.go
import (
    // ...
    math/rand
)
sample(pixel int) {
    rgb:= p.Vector{}
    for s := 0; s < ns; s++{
        u := (float64(i) + rand.Float64()) / float64(width)
        ray := camera.RayAt(u)
        rgb = rgb.Add(color(ray, world, 0, rand))

## sample.go
sample(pixel int, rand *rand.Rand) {
    rgb:= p.Vector{}
    for s := 0; s < ns; s++{
        u := (float64(i) + rand.Float64()) / float64(width)
        ray := camera.RayAt(u)
        rgb = rgb.Add(color(ray, world, 0, rand))
     }
   return rgb.DivideScalar(float64(ns))
}

## render_single_thread.go
render(){
    // ...
    // pixels for a single row
    for pixel := 0; pixel < width ; pixel ++ {
        sample(pixel)
    }
}

## render_multiple_thread.go
render(){
    // ...
// set up worker group
    var wg sync.WaitGroup

    for thread := 0; thread < NumThreads; thread++{
        wg.Add(1)

        go func(offset int){
            // create RNG for thread
	render(){
	// ...
	// set up worker group
	var wg sync.WaitGroup

	for thread := 0; thread < NumThreads; thread++{
	wg.Add(1)
	go func(offset int){

	for pixel := offset; pixel < width; pixel +=NumThreads {
	// line 293
	var globalRand = New(&lockedSource{src: NewSource(1).(*rngSource)})
	import (
	// ...
	math/rand
	)
	sample(pixel int) {
	rgb:= p.Vector{}
	for s := 0; s < ns; s++{
	u := (float64(i) + rand.Float64()) / float64(width)
	ray := camera.RayAt(u)
	rgb = rgb.Add(color(ray, world, 0, rand))
	sample(pixel int, rand *rand.Rand) {
	rgb:= p.Vector{}
	for s := 0; s < ns; s++{
	u := (float64(i) + rand.Float64()) / float64(width)
	ray := camera.RayAt(u)
	rgb = rgb.Add(color(ray, world, 0, rand))
	}
	return rgb.DivideScalar(float64(ns))
	}
	render(){
	// ...
	// pixels for a single row
	for pixel := 0; pixel < width ; pixel ++ {
	sample(pixel)
	}
	}