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## clicking on sandbox results to 'fix' them and turn sandboxes into tests

scenario sandbox-click-on-result-toggles-color-to-green [
  local-scope
  trace-until 100/app  # trace too long
  assume-screen 50/width, 20/height
  # basic recipe
  assume-resources [
    [lesson/recipes.mu] <- [
      |recipe 
# Listing 9 of https://raytracing.github.io/books/RayTracingInOneWeekend.html
#
# To run (on Linux):
#   $ git clone https://github.com/akkartik/mu
#   $ cd mu
#   $ ./translate raytracing/3.mu
#   $ ./a.elf > 3.ppm

fn ray-color _in: (addr ray), _out: (addr rgb) {
  var in/esi: (addr ray) <- copy _in
  var out/edi: (addr rgb) <- copy _out
  var dir/eax: (addr vec3) <- get in, dir
#?   print-string 0, "r.dir: "
#?   print-vec3 0, dir
#?   print-string 0, "\n"
  var unit-storage: vec3
  var unit/ecx: (addr vec3) <- address unit-storage
  vec3-unit dir, unit
#?   print-string 0, "r.dir normalized: "
#?   print-vec3 0, unit
#?   print-string 0, "\n"
  var y-addr/eax: (addr float) <- get unit, y
  # t = (dir.y + 1.0) / 2.0
  var t/xmm0: float <- copy *y-addr
  var one/eax: int <- copy 1
  var one-f/xmm1: float <- convert one
  t <- add one-f
  var two/eax: int <- copy 2
  var two-f/xmm2: float <- convert two
  t <- divide two-f
#?   print-string 0, "t: "
#?   print-float-hex 0, t
#?   print-string 0, "\n"
  # whitening = (1.0 - t) * white
  var whitening-storage: rgb
  var whitening/ecx: (addr rgb) <- address whitening-storage
  rgb-white whitening
  var one-minus-t/xmm3: float <- copy one-f
  one-minus-t <- subtract t
  rgb-scale-up whitening, one-minus-t
#?   print-string 0, "whitening: "
#?   print-rgb-raw 0, whitening
#?   print-string 0, "\n"
  # out = t * (0.5, 0.7, 1.0)
  var dest/eax: (addr float) <- get out, r
  fill-in-rational dest, 5, 0xa
  dest <- get out, g
  fill-in-rational dest, 7, 0xa
  dest <- get out, b
  copy-to *dest, one-f
  rgb-scale-up out, t
#?   print-string 0, "base: "
#?   print-rgb-raw 0, out
#?   print-string 0, "\n"
  # blend with whitening
  rgb-add-to out, whitening
#?   print-string 0, "result: "
#?   print-rgb-raw 0, out
#?   print-string 0, "\n"
}

fn main -> _/ebx: int {

  # image
  #   width = 400
  #   height = 400 * 9/16 = 225
  var aspect: float
  var aspect-addr/eax: (addr float) <- address aspect
  fill-in-rational aspect-addr, 0x10, 9  # 16/9
#?   print-string 0, "aspect ratio: "
#?   print-float-hex 0, aspect
#?   print-string 0, " "
#?   {
#?     var foo2/ebx: int <- reinterpret aspect
#?     print-int32-hex 0, foo2
#?   }
#?   print-string 0, "\n"

  # camera

  # viewport-height = 2.0
  var tmp/eax: int <- copy 2
  var two-f/xmm4: float <- convert tmp
  var viewport-height/xmm7: float <- copy two-f
#?   print-string 0, "viewport height: "
#?   print-float-hex 0, viewport-height
#?   print-string 0, " "
#?   {
#?     var foo: float
#?     copy-to foo, viewport-height
#?     var foo2/ebx: int <- reinterpret foo
#?     print-int32-hex 0, foo2
#?   }
#?   print-string 0, "\n"
  # viewport-width = aspect * viewport-height
  var viewport-width/xmm6: float <- convert tmp
  viewport-width <- multiply aspect
#?   print-string 0, "viewport width: "
#?   print-float-hex 0, viewport-width
#?   print-string 0, " "
#?   {
#?     var foo: float
#?     copy-to foo, viewport-width
#?     var foo2/ebx: int <- reinterpret foo
#?     print-int32-hex 0, foo2
#?   }
#?   print-string 0, "\n"
  # focal-length = 1.0
  tmp <- copy 1
  var focal-length/xmm5: float <- convert tmp

  # origin = point3(0, 0, 0)
  var origin-storage: vec3
  var origin/edi: (addr vec3) <- address origin-storage
  # horizontal = vec3(viewport-width, 0, 0)
  var horizontal-storage: vec3
  var dest/eax: (addr float) <- get horizontal-storage, x
  copy-to *dest, viewport-width
  var horizontal/ebx: (addr vec3) <- address horizontal-storage
  # vertical = vec3(0, viewport-height, 0)
  var vertical-storage: vec3
  dest <- get vertical-storage, y
  copy-to *dest, viewport-height
  var vertical/edx: (addr vec3) <- address vertical-storage
  # lower-left-corner = origin - horizontal/2 - vertical/2 - vec3(0, 0, focal-length)
  # . lower-left-corner = origin
  var lower-left-corner-storage: vec3
  var lower-left-corner/esi: (addr vec3) <- address lower-left-corner-storage
  copy-object origin, lower-left-corner
  # . lower-left-corner -= horizontal/2
  var tmp2: vec3
  var tmp2-addr/eax: (addr vec3) <- address tmp2
  copy-object horizontal, tmp2-addr
  vec3-scale-down tmp2-addr, two-f
  vec3-subtract-from lower-left-corner, tmp2-addr
  # . lower-left-corner -= vertical/2
  copy-object vertical, tmp2-addr
  vec3-scale-down tmp2-addr, two-f
  vec3-subtract-from lower-left-corner, tmp2-addr
  # . lower-left-corner -= vec3(0, 0, focal-length)
  var dest2/ecx: (addr float) <- get lower-left-corner, z
  var tmp3/xmm0: float <- copy *dest2
  tmp3 <- subtract focal-length
  copy-to *dest2, tmp3
  # phew!

  # render

  # live variables at this point:
  #   origin (edi)
  #   lower-left-corner (esi)
  #   horizontal (ebx)
  #   vertical (edx)
  # floating-point registers are all free
  print-string 0, "P3\n400 225\n255\n"  # 225 = image height
  var tmp/eax: int <- copy 0x18f # image width - 1
  var image-width-1/xmm7: float <- convert tmp
  tmp <- copy 0xe0  # image height - 1
  var image-height-1/xmm6: float <- convert tmp
  #
  var j/ecx: int <- copy 0xe0  # 224
  {
    compare j, 0
    break-if-<
    var i/eax: int <- copy 0
    {
      compare i, 0x190  # 400 = image width
      break-if->=
      # u = i / (image-width - 1)
      var u/xmm0: float <- convert i
      u <- divide image-width-1
#?       print-string 0, "u: "
#?       print-float-hex 0, u
#?       print-string 0, "\n"
      # v =
generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-12-25 18:29:53 +0000
lass="p">) var v/xmm1: float <- convert j v <- divide image-height-1 # r = ray(origin, lower-left-corner + u*horizontal + v*vertical - origin) var r-storage: ray # . . we're running out of int registers now, # . . but luckily we don't need i and j in the rest of this loop iteration, # . . so we'll just spill them in a block { # . r.orig = origin var r/eax: (addr ray) <- address r-storage var dest/ecx: (addr vec3) <- get r, orig copy-object origin, dest # . r.dir = lower-left-corner dest <- get r, dir copy-object lower-left-corner, dest # . r.dir += horizontal*u var tmp-vec3: vec3 var tmp/eax: (addr vec3) <- address tmp-vec3 copy-object horizontal, tmp vec3-scale-up tmp, u vec3-add-to dest, tmp # . r.dir += vertical*v copy-object vertical, tmp vec3-scale-up tmp, v vec3-add-to dest, tmp # . r.dir -= origin vec3-subtract-from dest, origin #? print-string 0, "ray direction: " #? print-vec3 0, dest #? print-string 0, "\n" } # pixel-color = ray-color(r) var c-storage: rgb var c/ecx: (addr rgb) <- address c-storage { var r/eax: (addr ray) <- address r-storage ray-color r, c # write color print-rgb 0, c #? print-rgb-raw 0, c #? print-string 0, "\n" } i <- increment loop } j <- decrement loop } return 0 } type ray { orig: vec3 # point dir: vec3 } # A little different from the constructor at https://raytracing.github.io/books/RayTracingInOneWeekend.html # We immediately normalize the direction vector so we don't have to keep doing # so. fn initialize-ray _self: (addr ray), o: (addr vec3), d: (addr vec3) { var self/esi: (addr ray) <- copy _self var dest/eax: (addr vec3) <- get self, orig copy-object o, dest dest <- get self, dir vec3-unit d, dest } fn ray-at _self: (addr ray), t: float, out: (addr vec3) { var self/esi: (addr ray) <- copy _self var src/eax: (addr vec3) <- get self, dir copy-object src, out vec3-scale-up out, t src <- get self, orig vec3-add-to out, src } type rgb { # components normalized to within [0.0, 1.0] r: float g: float b: float } # print translating to [0, 256) fn print-rgb screen: (addr screen), _c: (addr rgb) { var c/esi: (addr rgb) <- copy _c var xn: float var xn-addr/ecx: (addr float) <- address xn fill-in-rational xn-addr, 0x3e7ff, 0x3e8 # 255999 / 1000 # print 255.999 * c->r var result/xmm0: float <- copy xn var src-addr/eax: (addr float) <- get c, r result <- multiply *src-addr var result-int/edx: int <- truncate result print-int32-decimal screen, result-int print-string screen, " " # print 255.999 * c->g src-addr <- get c, g result <- copy xn result <- multiply *src-addr result-int <- truncate result print-int32-decimal screen, result-int print-string screen, " " # print 255.999 * c->b src-addr <- get c, b result <- copy xn result <- multiply *src-addr result-int <- truncate result print-int32-decimal screen, result-int print-string screen, "\n" } fn print-rgb-raw screen: (addr screen), _v: (addr rgb) { var v/esi: (addr rgb) <- copy _v print-string screen, "(" var tmp/eax: (addr float) <- get v, r print-float-hex screen, *tmp print-string screen, ", " tmp <- get v, g print-float-hex screen, *tmp print-string screen, ", " tmp <- get v, b print-float-hex screen, *tmp print-string screen, ")" } fn rgb-white _c: (addr rgb) { var c/esi: (addr rgb) <- copy _c var one/eax: int <- copy 1 var one-f/xmm0: float <- convert one var dest/edi: (addr float) <- get c, r copy-to *dest, one-f dest <- get c, g copy-to *dest, one-f dest <- get c, b copy-to *dest, one-f } fn rgb-add-to _c1: (addr rgb), _c2: (addr rgb) { var c1/edi: (addr rgb) <- copy _c1 var c2/esi: (addr rgb) <- copy _c2 # c1.r += c2.r var arg1/eax: (addr float) <- get c1, r var arg2/ecx: (addr float) <- get c2, r var result/xmm0: float <- copy *arg1 result <- add *arg2 copy-to *arg1, result # c1.g += c2.g arg1 <- get c1, g arg2 <- get c2, g result <- copy *arg1 result <- add *arg2 copy-to *arg1, result # c1.b += c2.b arg1 <- get c1, b arg2 <- get c2, b result <- copy *arg1 result <- add *arg2 copy-to *arg1, result } fn rgb-scale-up _c1: (addr rgb), f: float { var c1/edi: (addr rgb) <- copy _c1 # c1.r *= f var dest/eax: (addr float) <- get c1, r var result/xmm0: float <- copy *dest result <- multiply f copy-to *dest, result # c1.g *= f dest <- get c1, g result <- copy *dest result <- multiply f copy-to *dest, result # c1.b *= f dest <- get c1, b result <- copy *dest result <- multiply f copy-to *dest, result } type vec3 { x: float y: float z: float } fn print-vec3 screen: (addr screen), _v: (addr vec3) { var v/esi: (addr vec3) <- copy _v print-string screen, "(" var tmp/eax: (addr float) <- get v, x print-float-hex screen, *tmp print-string screen, ", " tmp <- get v, y print-float-hex screen, *tmp print-string screen, ", " tmp <- get v, z print-float-hex screen, *tmp print-string screen, ")" } fn vec3-add-to _v1: (addr vec3), _v2: (addr vec3) { var v1/edi: (addr vec3) <- copy _v1 var v2/esi: (addr vec3) <- copy _v2 # v1.x += v2.x var arg1/eax: (addr float) <- get v1, x var arg2/ecx: (addr float) <- get v2, x var result/xmm0: float <- copy *arg1 result <- add *arg2 copy-to *arg1, result # v1.y += v2.y arg1 <- get v1, y arg2 <- get v2, y result <- copy *arg1 result <- add *arg2 copy-to *arg1, result # v1.z += v2.z arg1 <- get v1, z arg2 <- get v2, z result <- copy *arg1 result <- add *arg2 copy-to *arg1, result } fn vec3-subtract-from v1: (addr vec3), v2: (addr vec3) { var tmp-storage: vec3 var tmp/eax: (addr vec3) <- address tmp-storage copy-object v2, tmp vec3-negate tmp vec3-add-to v1, tmp } fn vec3-negate v: (addr vec3) { var negative-one/eax: int <- copy -1 var negative-one-f/xmm0: float <- convert negative-one vec3-scale-up v, negative-one-f } fn vec3-scale-up _v: (addr vec3), f: float { var v/edi: (addr vec3) <- copy _v # v.x *= f var dest/eax: (addr float) <- get v, x var result/xmm0: float <- copy *dest result <- multiply f copy-to *dest, result # v.y *= f dest <- get v, y result <- copy *dest result <- multiply f copy-to *dest, result # v.z *= f dest <- get v, z result <- copy *dest result <- multiply f copy-to *dest, result } fn vec3-scale-down _v: (addr vec3), f: float { var v/edi: (addr vec3) <- copy _v # v.x /= f var dest/eax: (addr float) <- get v, x var result/xmm0: float <- copy *dest result <- divide f copy-to *dest, result # v.y /= f dest <- get v, y result <- copy *dest result <- divide f copy-to *dest, result # v.z /= f dest <- get v, z result <- copy *dest result <- divide f copy-to *dest, result } fn vec3-unit in: (addr vec3), out: (addr vec3) { var len/xmm0: float <- vec3-length in #? print-string 0, "len: " #? print-float-hex 0, len #? print-string 0, "\n" copy-object in, out vec3-scale-down out, len } fn vec3-length v: (addr vec3) -> _/xmm0: float { var result/xmm0: float <- vec3-length-squared v result <- square-root result return result } fn vec3-length-squared _v: (addr vec3) -> _/xmm0: float { var v/esi: (addr vec3) <- copy _v # result = v.x * v.x var src/eax: (addr float) <- get v, x var tmp/xmm1: float <- copy *src tmp <- multiply tmp var result/xmm0: float <- copy tmp # result += v.y * v.y src <- get v, y tmp <- copy *src tmp <- multiply tmp result <- add tmp # result += v.z * v.z src <- get v, z tmp <- copy *src tmp <- multiply tmp result <- add tmp return result }
generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-12-25 18:29:53 +0000