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<a href='https://github.com/akkartik/mu/blob/main/linux/raytracing/3.mu'>https://github.com/akkartik/mu/blob/main/linux/raytracing/3.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="muComment"># Listing 9 of <a href="https://raytracing.github.io/books/RayTracingInOneWeekend.html">https://raytracing.github.io/books/RayTracingInOneWeekend.html</a></span>
<span id="L2" class="LineNr"> 2 </span><span class="muComment">#</span>
<span id="L3" class="LineNr"> 3 </span><span class="muComment"># To run (on Linux):</span>
<span id="L4" class="LineNr"> 4 </span><span class="muComment"># $ git clone <a href="https://github.com/akkartik/mu">https://github.com/akkartik/mu</a></span>
<span id="L5" class="LineNr"> 5 </span><span class="muComment"># $ cd mu</span>
<span id="L6" class="LineNr"> 6 </span><span class="muComment"># $ ./translate raytracing/3.mu</span>
<span id="L7" class="LineNr"> 7 </span><span class="muComment"># $ ./a.elf > 3.ppm</span>
<span id="L8" class="LineNr"> 8 </span>
<span id="L9" class="LineNr"> 9 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='3.mu.html#L9'>ray-color</a></span> _in: (addr ray), _out: (addr rgb) <span class="Delimiter">{</span>
<span id="L10" class="LineNr"> 10 </span> <span class="PreProc">var</span> in/<span class="Constant">esi</span>: (addr ray) <span class="Special"><-</span> copy _in
<span id="L11" class="LineNr"> 11 </span> <span class="PreProc">var</span> out/<span class="Constant">edi</span>: (addr rgb) <span class="Special"><-</span> copy _out
<span id="L12" class="LineNr"> 12 </span> <span class="PreProc">var</span> dir/<span class="Constant">eax</span>: (addr vec3) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> in, dir
<span id="L13" class="LineNr"> 13 </span><span class="CommentedCode">#? print-string 0, "r.dir: "</span>
<span id="L14" class="LineNr"> 14 </span><span class="CommentedCode">#? print-vec3 0, dir</span>
<span id="L15" class="LineNr"> 15 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L16" class="LineNr"> 16 </span> <span class="PreProc">var</span> unit-storage: vec3
<span id="L17" class="LineNr"> 17 </span> <span class="PreProc">var</span> unit/<span class="Constant">ecx</span>: (addr vec3) <span class="Special"><-</span> address unit-storage
<span id="L18" class="LineNr"> 18 </span> vec3-unit dir, unit
<span id="L19" class="LineNr"> 19 </span><span class="CommentedCode">#? print-string 0, "r.dir normalized: "</span>
<span id="L20" class="LineNr"> 20 </span><span class="CommentedCode">#? print-vec3 0, unit</span>
<span id="L21" class="LineNr"> 21 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L22" class="LineNr"> 22 </span> <span class="PreProc">var</span> y-addr/<span class="Constant">eax</span>: (addr float) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> unit, y
<span id="L23" class="LineNr"> 23 </span> <span class="muComment"># t = (dir.y + 1.0) / 2.0</span>
<span id="L24" class="LineNr"> 24 </span> <span class="PreProc">var</span> t/<span class="Constant">xmm0</span>: float <span class="Special"><-</span> copy *y-addr
<span id="L25" class="LineNr"> 25 </span> <span class="PreProc">var</span> one/<span class="Constant">eax</span>: int <span class="Special"><-</span> copy <span class="Constant">1</span>
<span id="L26" class="LineNr"> 26 </span> <span class="PreProc">var</span> one-f/<span class="Constant">xmm1</span>: float <span class="Special"><-</span> convert one
<span id="L27" class="LineNr"> 27 </span> t <span class="Special"><-</span> add one-f
<span id="L28" class="LineNr"> 28 </span> <span class="PreProc">var</span> two/<span class="Constant">eax</span>: int <span class="Special"><-</span> copy <span class="Constant">2</span>
<span id="L29" class="LineNr"> 29 </span> <span class="PreProc">var</span> two-f/<span class="Constant">xmm2</span>: float <span class="Special"><-</span> convert two
<span id="L30" class="LineNr"> 30 </span> t <span class="Special"><-</span> divide two-f
<span id="L31" class="LineNr"> 31 </span><span class="CommentedCode">#? print-string 0, "t: "</span>
<span id="L32" class="LineNr"> 32 </span><span class="CommentedCode">#? print-float-hex 0, t</span>
<span id="L33" class="LineNr"> 33 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L34" class="LineNr"> 34 </span> <span class="muComment"># whitening = (1.0 - t) * white</span>
<span id="L35" class="LineNr"> 35 </span> <span class="PreProc">var</span> whitening-storage: rgb
<span id="L36" class="LineNr"> 36 </span> <span class="PreProc">var</span> whitening/<span class="Constant">ecx</span>: (addr rgb) <span class="Special"><-</span> address whitening-storage
<span id="L37" class="LineNr"> 37 </span> <a href='3.mu.html#L302'>rgb-white</a> whitening
<span id="L38" class="LineNr"> 38 </span> <span class="PreProc">var</span> one-minus-t/<span class="Constant">xmm3</span>: float <span class="Special"><-</span> copy one-f
<span id="L39" class="LineNr"> 39 </span> one-minus-t <span class="Special"><-</span> subtract t
<span id="L40" class="LineNr"> 40 </span> <a href='3.mu.html#L337'>rgb-scale-up</a> whitening, one-minus-t
<span id="L41" class="LineNr"> 41 </span><span class="CommentedCode">#? print-string 0, "whitening: "</span>
<span id="L42" class="LineNr"> 42 </span><span class="CommentedCode">#? print-rgb-raw 0, whitening</span>
<span id="L43" class="LineNr"> 43 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L44" class="LineNr"> 44 </span> <span class="muComment"># out = t * (0.5, 0.7, 1.0)</span>
<span id="L45" class="LineNr"> 45 </span> <span class="PreProc">var</span> dest/<span class="Constant">eax</span>: (addr float) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> out, r
<span id="L46" class="LineNr"> 46 </span> <a href='../408float.mu.html#L3'>fill-in-rational</a> dest, <span class="Constant">5</span>, <span class="Constant">0xa</span>
<span id="L47" class="LineNr"> 47 </span> dest <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> out, g
<span id="L48" class="LineNr"> 48 </span> <a href='../408float.mu.html#L3'>fill-in-rational</a> dest, <span class="Constant">7</span>, <span class="Constant">0xa</span>
<span id="L49" class="LineNr"> 49 </span> dest <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> out, b
<span id="L50" class="LineNr"> 50 </span> copy-to *dest, one-f
<span id="L51" class="LineNr"> 51 </span> <a href='3.mu.html#L337'>rgb-scale-up</a> out, t
<span id="L52" class="LineNr"> 52 </span><span class="CommentedCode">#? print-string 0, "base: "</span>
<span id="L53" class="LineNr"> 53 </span><span class="CommentedCode">#? print-rgb-raw 0, out</span>
<span id="L54" class="LineNr"> 54 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L55" class="LineNr"> 55 </span> <span class="muComment"># blend with whitening</span>
<span id="L56" class="LineNr"> 56 </span> <a href='3.mu.html#L314'>rgb-add-to</a> out, whitening
<span id="L57" class="LineNr"> 57 </span><span class="CommentedCode">#? print-string 0, "result: "</span>
<span id="L58" class="LineNr"> 58 </span><span class="CommentedCode">#? print-rgb-raw 0, out</span>
<span id="L59" class="LineNr"> 59 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L60" class="LineNr"> 60 </span><span class="Delimiter">}</span>
<span id="L61" class="LineNr"> 61 </span>
<span id="L62" class="LineNr"> 62 </span><span class="PreProc">fn</span> <span class="muFunction">main</span><span class="PreProc"> -> </span>_/<span class="Constant">ebx</span>: int <span class="Delimiter">{</span>
<span id="L63" class="LineNr"> 63 </span>
<span id="L64" class="LineNr"> 64 </span> <span class="muComment"># image</span>
<span id="L65" class="LineNr"> 65 </span> <span class="muComment"># width = 400</span>
<span id="L66" class="LineNr"> 66 </span> <span class="muComment"># height = 400 * 9/16 = 225</span>
<span id="L67" class="LineNr"> 67 </span> <span class="PreProc">var</span> aspect: float
<span id="L68" class="LineNr"> 68 </span> <span class="PreProc">var</span> aspect-addr/<span class="Constant">eax</span>: (addr float) <span class="Special"><-</span> address aspect
<span id="L69" class="LineNr"> 69 </span> <a href='../408float.mu.html#L3'>fill-in-rational</a> aspect-addr, <span class="Constant">0x10</span>, <span class="Constant">9</span> <span class="muComment"># 16/9</span>
<span id="L70" class="LineNr"> 70 </span><span class="CommentedCode">#? print-string 0, "aspect ratio: "</span>
<span id="L71" class="LineNr"> 71 </span><span class="CommentedCode">#? print-float-hex 0, aspect</span>
<span id="L72" class="LineNr"> 72 </span><span class="CommentedCode">#? print-string 0, " "</span>
<span id="L73" class="LineNr"> 73 </span><span class="CommentedCode">#? {</span>
<span id="L74" class="LineNr"> 74 </span><span class="CommentedCode">#? var foo2/ebx: int <- reinterpret aspect</span>
<span id="L75" class="LineNr"> 75 </span><span class="CommentedCode">#? print-int32-hex 0, foo2</span>
<span id="L76" class="LineNr"> 76 </span><span class="CommentedCode">#? }</span>
<span id="L77" class="LineNr"> 77 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L78" class="LineNr"> 78 </span>
<span id="L79" class="LineNr"> 79 </span> <span class="muComment"># camera</span>
<span id="L80" class="LineNr"> 80 </span>
<span id="L81" class="LineNr"> 81 </span> <span class="muComment"># viewport-height = 2.0</span>
<span id="L82" class="LineNr"> 82 </span> <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: int <span class="Special"><-</span> copy <span class="Constant">2</span>
<span id="L83" class="LineNr"> 83 </span> <span class="PreProc">var</span> two-f/<span class="Constant">xmm4</span>: float <span class="Special"><-</span> convert tmp
<span id="L84" class="LineNr"> 84 </span> <span class="PreProc">var</span> viewport-height/<span class="Constant">xmm7</span>: float <span class="Special"><-</span> copy two-f
<span id="L85" class="LineNr"> 85 </span><span class="CommentedCode">#? print-string 0, "viewport height: "</span>
<span id="L86" class="LineNr"> 86 </span><span class="CommentedCode">#? print-float-hex 0, viewport-height</span>
<span id="L87" class="LineNr"> 87 </span><span class="CommentedCode">#? print-string 0, " "</span>
<span id="L88" class="LineNr"> 88 </span><span class="CommentedCode">#? {</span>
<span id="L89" class="LineNr"> 89 </span><span class="CommentedCode">#? var foo: float</span>
<span id="L90" class="LineNr"> 90 </span><span class="CommentedCode">#? copy-to foo, viewport-height</span>
<span id="L91" class="LineNr"> 91 </span><span class="CommentedCode">#? var foo2/ebx: int <- reinterpret foo</span>
<span id="L92" class="LineNr"> 92 </span><span class="CommentedCode">#? print-int32-hex 0, foo2</span>
<span id="L93" class="LineNr"> 93 </span><span class="CommentedCode">#? }</span>
<span id="L94" class="LineNr"> 94 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L95" class="LineNr"> 95 </span> <span class="muComment"># viewport-width = aspect * viewport-height</span>
<span id="L96" class="LineNr"> 96 </span> <span class="PreProc">var</span> viewport-width/<span class="Constant">xmm6</span>: float <span class="Special"><-</span> convert tmp
<span id="L97" class="LineNr"> 97 </span> viewport-width <span class="Special"><-</span> multiply aspect
<span id="L98" class="LineNr"> 98 </span><span class="CommentedCode">#? print-string 0, "viewport width: "</span>
<span id="L99" class="LineNr"> 99 </span><span class="CommentedCode">#? print-float-hex 0, viewport-width</span>
<span id="L100" class="LineNr">100 </span><span class="CommentedCode">#? print-string 0, " "</span>
<span id="L101" class="LineNr">101 </span><span class="CommentedCode">#? {</span>
<span id="L102" class="LineNr">102 </span><span class="CommentedCode">#? var foo: float</span>
<span id="L103" class="LineNr">103 </span><span class="CommentedCode">#? copy-to foo, viewport-width</span>
<span id="L104" class="LineNr">104 </span><span class="CommentedCode">#? var foo2/ebx: int <- reinterpret foo</span>
<span id="L105" class="LineNr">105 </span><span class="CommentedCode">#? print-int32-hex 0, foo2</span>
<span id="L106" class="LineNr">106 </span><span class="CommentedCode">#? }</span>
<span id="L107" class="LineNr">107 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L108" class="LineNr">108 </span> <span class="muComment"># focal-length = 1.0</span>
<span id="L109" class="LineNr">109 </span> tmp <span class="Special"><-</span> copy <span class="Constant">1</span>
<span id="L110" class="LineNr">110 </span> <span class="PreProc">var</span> focal-length/<span class="Constant">xmm5</span>: float <span class="Special"><-</span> convert tmp
<span id="L111" class="LineNr">111 </span>
<span id="L112" class="LineNr">112 </span> <span class="muComment"># origin = point3(0, 0, 0)</span>
<span id="L113" class="LineNr">113 </span> <span class="PreProc">var</span> origin-storage: vec3
<span id="L114" class="LineNr">114 </span> <span class="PreProc">var</span> origin/<span class="Constant">edi</span>: (addr vec3) <span class="Special"><-</span> address origin-storage
<span id="L115" class="LineNr">115 </span> <span class="muComment"># horizontal = vec3(viewport-width, 0, 0)</span>
<span id="L116" class="LineNr">116 </span> <span class="PreProc">var</span> horizontal-storage: vec3
<span id="L117" class="LineNr">117 </span> <span class="PreProc">var</span> dest/<span class="Constant">eax</span>: (addr float) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> horizontal-storage, x
<span id="L118" class="LineNr">118 </span> copy-to *dest, viewport-width
<span id="L119" class="LineNr">119 </span> <span class="PreProc">var</span> horizontal/<span class="Constant">ebx</span>: (addr vec3) <span class="Special"><-</span> address horizontal-storage
<span id="L120" class="LineNr">120 </span> <span class="muComment"># vertical = vec3(0, viewport-height, 0)</span>
<span id="L121" class="LineNr">121 </span> <span class="PreProc">var</span> vertical-storage: vec3
<span id="L122" class="LineNr">122 </span> dest <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> vertical-storage, y
<span id="L123" class="LineNr">123 </span> copy-to *dest, viewport-height
<span id="L124" class="LineNr">124 </span> <span class="PreProc">var</span> vertical/<span class="Constant">edx</span>: (addr vec3) <span class="Special"><-</span> address vertical-storage
<span id="L125" class="LineNr">125 </span> <span class="muComment"># lower-left-corner = origin - horizontal/2 - vertical/2 - vec3(0, 0, focal-length)</span>
<span id="L126" class="LineNr">126 </span> <span class="muS1Comment"># . lower-left-corner = origin</span>
<span id="L127" class="LineNr">127 </span> <span class="PreProc">var</span> lower-left-corner-storage: vec3
<span id="L128" class="LineNr">128 </span> <span class="PreProc">var</span> lower-left-corner/<span class="Constant">esi</span>: (addr vec3) <span class="Special"><-</span> address lower-left-corner-storage
<span id="L129" class="LineNr">129 </span> copy-object origin, lower-left-corner
<span id="L130" class="LineNr">130 </span> <span class="muS1Comment"># . lower-left-corner -= horizontal/2</span>
<span id="L131" class="LineNr">131 </span> <span class="PreProc">var</span> tmp2: vec3
<span id="L132" class="LineNr">132 </span> <span class="PreProc">var</span> tmp2-addr/<span class="Constant">eax</span>: (addr vec3) <span class="Special"><-</span> address tmp2
<span id="L133" class="LineNr">133 </span> copy-object horizontal, tmp2-addr
<span id="L134" class="LineNr">134 </span> vec3-scale-down tmp2-addr, two-f
<span id="L135" class="LineNr">135 </span> vec3-subtract-from lower-left-corner, tmp2-addr
<span id="L136" class="LineNr">136 </span> <span class="muS1Comment"># . lower-left-corner -= vertical/2</span>
<span id="L137" class="LineNr">137 </span> copy-object vertical, tmp2-addr
<span id="L138" class="LineNr">138 </span> vec3-scale-down tmp2-addr, two-f
<span id="L139" class="LineNr">139 </span> vec3-subtract-from lower-left-corner, tmp2-addr
<span id="L140" class="LineNr">140 </span> <span class="muS1Comment"># . lower-left-corner -= vec3(0, 0, focal-length)</span>
<span id="L141" class="LineNr">141 </span> <span class="PreProc">var</span> dest2/<span class="Constant">ecx</span>: (addr float) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> lower-left-corner, z
<span id="L142" class="LineNr">142 </span> <span class="PreProc">var</span> tmp3/<span class="Constant">xmm0</span>: float <span class="Special"><-</span> copy *dest2
<span id="L143" class="LineNr">143 </span> tmp3 <span class="Special"><-</span> subtract focal-length
<span id="L144" class="LineNr">144 </span> copy-to *dest2, tmp3
<span id="L145" class="LineNr">145 </span> <span class="muComment"># phew!</span>
<span id="L146" class="LineNr">146 </span>
<span id="L147" class="LineNr">147 </span> <span class="muComment"># render</span>
<span id="L148" class="LineNr">148 </span>
<span id="L149" class="LineNr">149 </span> <span class="muComment"># live variables at this point:</span>
<span id="L150" class="LineNr">150 </span> <span class="muComment"># origin (edi)</span>
<span id="L151" class="LineNr">151 </span> <span class="muComment"># lower-left-corner (esi)</span>
<span id="L152" class="LineNr">152 </span> <span class="muComment"># horizontal (ebx)</span>
<span id="L153" class="LineNr">153 </span> <span class="muComment"># vertical (edx)</span>
<span id="L154" class="LineNr">154 </span> <span class="muComment"># floating-point registers are all free</span>
<span id="L155" class="LineNr">155 </span> <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">"P3\n400 225\n255\n"</span> <span class="muComment"># 225 = image height</span>
<span id="L156" class="LineNr">156 </span> <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: int <span class="Special"><-</span> copy <span class="Constant">0x18f</span> <span class="muComment"># image width - 1</span>
<span id="L157" class="LineNr">157 </span> <span class="PreProc">var</span> image-width-1/<span class="Constant">xmm7</span>: float <span class="Special"><-</span> convert tmp
<span id="L158" class="LineNr">158 </span> tmp <span class="Special"><-</span> copy <span class="Constant">0xe0</span> <span class="muComment"># image height - 1</span>
<span id="L159" class="LineNr">159 </span> <span class="PreProc">var</span> image-height-1/<span class="Constant">xmm6</span>: float <span class="Special"><-</span> convert tmp
<span id="L160" class="LineNr">160 </span> <span class="muComment">#</span>
<span id="L161" class="LineNr">161 </span> <span class="PreProc">var</span> j/<span class="Constant">ecx</span>: int <span class="Special"><-</span> copy <span class="Constant">0xe0</span> <span class="muComment"># 224</span>
<span id="L162" class="LineNr">162 </span> <span class="Delimiter">{</span>
<span id="L163" class="LineNr">163 </span> compare j, <span class="Constant">0</span>
<span id="L164" class="LineNr">164 </span> <span class="PreProc">break-if-<</span>
<span id="L165" class="LineNr">165 </span> <span class="PreProc">var</span> i/<span class="Constant">eax</span>: int <span class="Special"><-</span> copy <span class="Constant">0</span>
<span id="L166" class="LineNr">166 </span> <span class="Delimiter">{</span>
<span id="L167" class="LineNr">167 </span> compare i, <span class="Constant">0x190</span> <span class="muComment"># 400 = image width</span>
<span id="L168" class="LineNr">168 </span> <span class="PreProc">break-if->=</span>
<span id="L169" class="LineNr">169 </span> <span class="muComment"># u = i / (image-width - 1)</span>
<span id="L170" class="LineNr">170 </span> <span class="PreProc">var</span> u/<span class="Constant">xmm0</span>: float <span class="Special"><-</span> convert i
<span id="L171" class="LineNr">171 </span> u <span class="Special"><-</span> divide image-width-1
<span id="L172" class="LineNr">172 </span><span class="CommentedCode">#? print-string 0, "u: "</span>
<span id="L173" class="LineNr">173 </span><span class="CommentedCode">#? print-float-hex 0, u</span>
<span id="L174" class="LineNr">174 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L175" class="LineNr">175 </span> <span class="muComment"># v = j / (image-height - 1)</span>
<span id="L176" class="LineNr">176 </span> <span class="PreProc">var</span> v/<span class="Constant">xmm1</span>: float <span class="Special"><-</span> convert j
<span id="L177" class="LineNr">177 </span> v <span class="Special"><-</span> divide image-height-1
<span id="L178" class="LineNr">178 </span> <span class="muComment"># r = ray(origin, lower-left-corner + u*horizontal + v*vertical - origin)</span>
<span id="L179" class="LineNr">179 </span> <span class="PreProc">var</span> r-storage: ray
<span id="L180" class="LineNr">180 </span> <span class="muS2Comment"># . . we're running out of int registers now,</span>
<span id="L181" class="LineNr">181 </span> <span class="muS2Comment"># . . but luckily we don't need i and j in the rest of this loop iteration,</span>
<span id="L182" class="LineNr">182 </span> <span class="muS2Comment"># . . so we'll just spill them in a block</span>
<span id="L183" class="LineNr">183 </span> <span class="Delimiter">{</span>
<span id="L184" class="LineNr">184 </span> <span class="muS1Comment"># . r.orig = origin</span>
<span id="L185" class="LineNr">185 </span> <span class="PreProc">var</span> r/<span class="Constant">eax</span>: (addr ray) <span class="Special"><-</span> address r-storage
<span id="L186" class="LineNr">186 </span> <span class="PreProc">var</span> dest/<span class="Constant">ecx</span>: (addr vec3) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> r, orig
<span id="L187" class="LineNr">187 </span> copy-object origin, dest
<span id="L188" class="LineNr">188 </span> <span class="muS1Comment"># . r.dir = lower-left-corner</span>
<span id="L189" class="LineNr">189 </span> dest <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> r, dir
<span id="L190" class="LineNr">190 </span> copy-object lower-left-corner, dest
<span id="L191" class="LineNr">191 </span> <span class="muS1Comment"># . r.dir += horizontal*u</span>
<span id="L192" class="LineNr">192 </span> <span class="PreProc">var</span> tmp-vec3: vec3
<span id="L193" class="LineNr">193 </span> <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: (addr vec3) <span class="Special"><-</span> address tmp-vec3
<span id="L194" class="LineNr">194 </span> copy-object horizontal, tmp
<span id="L195" class="LineNr">195 </span> vec3-scale-up tmp, u
<span id="L196" class="LineNr">196 </span> vec3-add-to dest, tmp
<span id="L197" class="LineNr">197 </span> <span class="muS1Comment"># . r.dir += vertical*v</span>
<span id="L198" class="LineNr">198 </span> copy-object vertical, tmp
<span id="L199" class="LineNr">199 </span> vec3-scale-up tmp, v
<span id="L200" class="LineNr">200 </span> vec3-add-to dest, tmp
<span id="L201" class="LineNr">201 </span> <span class="muS1Comment"># . r.dir -= origin</span>
<span id="L202" class="LineNr">202 </span> vec3-subtract-from dest, origin
<span id="L203" class="LineNr">203 </span><span class="CommentedCode">#? print-string 0, "ray direction: "</span>
<span id="L204" class="LineNr">204 </span><span class="CommentedCode">#? print-vec3 0, dest</span>
<span id="L205" class="LineNr">205 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L206" class="LineNr">206 </span> <span class="Delimiter">}</span>
<span id="L207" class="LineNr">207 </span> <span class="muComment"># pixel-color = ray-color(r)</span>
<span id="L208" class="LineNr">208 </span> <span class="PreProc">var</span> c-storage: rgb
<span id="L209" class="LineNr">209 </span> <span class="PreProc">var</span> c/<span class="Constant">ecx</span>: (addr rgb) <span class="Special"><-</span> address c-storage
<span id="L210" class="LineNr">210 </span> <span class="Delimiter">{</span>
<span id="L211" class="LineNr">211 </span> <span class="PreProc">var</span> r/<span class="Constant">eax</span>: (addr ray) <span class="Special"><-</span> address r-storage
<span id="L212" class="LineNr">212 </span> <a href='3.mu.html#L9'>ray-color</a> r, c
<span id="L213" class="LineNr">213 </span> <span class="muComment"># write color</span>
<span id="L214" class="LineNr">214 </span> print-rgb <span class="Constant">0</span>, c
<span id="L215" class="LineNr">215 </span><span class="CommentedCode">#? print-rgb-raw 0, c</span>
<span id="L216" class="LineNr">216 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L217" class="LineNr">217 </span> <span class="Delimiter">}</span>
<span id="L218" class="LineNr">218 </span> i <span class="Special"><-</span> increment
<span id="L219" class="LineNr">219 </span> <span class="PreProc">loop</span>
<span id="L220" class="LineNr">220 </span> <span class="Delimiter">}</span>
<span id="L221" class="LineNr">221 </span> j <span class="Special"><-</span> decrement
<span id="L222" class="LineNr">222 </span> <span class="PreProc">loop</span>
<span id="L223" class="LineNr">223 </span> <span class="Delimiter">}</span>
<span id="L224" class="LineNr">224 </span> <span class="PreProc">return</span> <span class="Constant">0</span>
<span id="L225" class="LineNr">225 </span><span class="Delimiter">}</span>
<span id="L226" class="LineNr">226 </span>
<span id="L227" class="LineNr">227 </span><span class="PreProc">type</span> ray <span class="Delimiter">{</span>
<span id="L228" class="LineNr">228 </span> orig: vec3 <span class="muComment"># point</span>
<span id="L229" class="LineNr">229 </span> dir: vec3
<span id="L230" class="LineNr">230 </span><span class="Delimiter">}</span>
<span id="L231" class="LineNr">231 </span>
<span id="L232" class="LineNr">232 </span><span class="muComment"># A little different from the constructor at <a href="https://raytracing.github.io/books/RayTracingInOneWeekend.html">https://raytracing.github.io/books/RayTracingInOneWeekend.html</a></span>
<span id="L233" class="LineNr">233 </span><span class="muComment"># We immediately normalize the direction vector so we don't have to keep doing</span>
<span id="L234" class="LineNr">234 </span><span class="muComment"># so.</span>
<span id="L235" class="LineNr">235 </span><span class="PreProc">fn</span> <span class="muFunction">initialize-ray</span> _self: (addr ray), o: (addr vec3), d: (addr vec3) <span class="Delimiter">{</span>
<span id="L236" class="LineNr">236 </span> <span class="PreProc">var</span> self/<span class="Constant">esi</span>: (addr ray) <span class="Special"><-</span> copy _self
<span id="L237" class="LineNr">237 </span> <span class="PreProc">var</span> dest/<span class="Constant">eax</span>: (addr vec3) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> self, orig
<span id="L238" class="LineNr">238 </span> copy-object o, dest
<span id="L239" class="LineNr">239 </span> dest <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> self, dir
<span id="L240" class="LineNr">240 </span> vec3-unit d, dest
<span id="L241" class="LineNr">241 </span><span class="Delimiter">}</span>
<span id="L242" class="LineNr">242 </span>
<span id="L243" class="LineNr">243 </span><span class="PreProc">fn</span> <span class="muFunction">ray-at</span> _self: (addr ray), t: float, out: (addr vec3) <span class="Delimiter">{</span>
<span id="L244" class="LineNr">244 </span> <span class="PreProc">var</span> self/<span class="Constant">esi</span>: (addr ray) <span class="Special"><-</span> copy _self
<span id="L245" class="LineNr">245 </span> <span class="PreProc">var</span> src/<span class="Constant">eax</span>: (addr vec3) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> self, dir
<span id="L246" class="LineNr">246 </span> copy-object src, out
<span id="L247" class="LineNr">247 </span> vec3-scale-up out, t
<span id="L248" class="LineNr">248 </span> src <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> self, orig
<span id="L249" class="LineNr">249 </span> vec3-add-to out, src
<span id="L250" class="LineNr">250 </span><span class="Delimiter">}</span>
<span id="L251" class="LineNr">251 </span>
<span id="L252" class="LineNr">252 </span><span class="PreProc">type</span> rgb <span class="Delimiter">{</span>
<span id="L253" class="LineNr">253 </span> <span class="muComment"># components normalized to within [0.0, 1.0]</span>
<span id="L254" class="LineNr">254 </span> r: float
<span id="L255" class="LineNr">255 </span> g: float
<span id="L256" class="LineNr">256 </span> b: float
<span id="L257" class="LineNr">257 </span><span class="Delimiter">}</span>
<span id="L258" class="LineNr">258 </span>
<span id="L259" class="LineNr">259 </span><span class="muComment"># print translating to [0, 256)</span>
<span id="L260" class="LineNr">260 </span><span class="PreProc">fn</span> <span class="muFunction">print-rgb</span> <a href='../405screen.mu.html#L9'>screen</a>: (addr <a href='../405screen.mu.html#L9'>screen</a>), _c: (addr rgb) <span class="Delimiter">{</span>
<span id="L261" class="LineNr">261 </span> <span class="PreProc">var</span> c/<span class="Constant">esi</span>: (addr rgb) <span class="Special"><-</span> copy _c
<span id="L262" class="LineNr">262 </span> <span class="PreProc">var</span> xn: float
<span id="L263" class="LineNr">263 </span> <span class="PreProc">var</span> xn-addr/<span class="Constant">ecx</span>: (addr float) <span class="Special"><-</span> address xn
<span id="L264" class="LineNr">264 </span> <a href='../408float.mu.html#L3'>fill-in-rational</a> xn-addr, <span class="Constant">0x3e7ff</span>, <span class="Constant">0x3e8</span> <span class="muComment"># 255999 / 1000</span>
<span id="L265" class="LineNr">265 </span> <span class="muComment"># print 255.999 * c->r</span>
<span id="L266" class="LineNr">266 </span> <span class="PreProc">var</span> result/<span class="Constant">xmm0</span>: float <span class="Special"><-</span> copy xn
<span id="L267" class="LineNr">267 </span> <span class="PreProc">var</span> src-addr/<span class="Constant">eax</span>: (addr float) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> c, r
<span id="L268" class="LineNr">268 </span> result <span class="Special"><-</span> multiply *src-addr
<span id="L269" class="LineNr">269 </span> <span class="PreProc">var</span> result-int/<span class="Constant">edx</span>: int <span class="Special"><-</span> truncate result
<span id="L270" class="LineNr">270 </span> <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <a href='../405screen.mu.html#L9'>screen</a>, result-int
<span id="L271" class="LineNr">271 </span> <a href='../405screen.mu.html#L169'>print-string</a> <a href='../405screen.mu.html#L9'>screen</a>, <span class="Constant">" "</span>
<span id="L272" class="LineNr">272 </span> <span class="muComment"># print 255.999 * c->g</span>
<span id="L273" class="LineNr">273 </span> src-addr <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> c, g
<span id="L274" class="LineNr">274 </span> result <span class="Special"><-</span> copy xn
<span id="L275" class="LineNr">275 </span> result <span class="Special"><-</span> multiply *src-addr
<span id="L276" class="LineNr">276 </span> result-int <span class="Special"><-</span> truncate result
<span id="L277" class="LineNr">277 </span> <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <a href='../405screen.mu.html#L9'>screen</a>, result-int
<span id="L278" class="LineNr">278 </span> <a href='../405screen.mu.html#L169'>print-string</a> <a href='../405screen.mu.html#L9'>screen</a>, <span class="Constant">" "</span>
<span id="L279" class="LineNr">279 </span> <span class="muComment"># print 255.999 * c->b</span>
<span id="L280" class="LineNr">280 </span> src-addr <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> c, b
<span id="L281" class="LineNr">281 </span> result <span class="Special"><-</span> copy xn
<span id="L282" class="LineNr">282 </span> result <span class="Special"><-</span> multiply *src-addr
<span id="L283" class="LineNr">283 </span> result-int <span class="Special"><-</span> truncate result
<span id="L284" class="LineNr">284 </span> <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <a href='../405screen.mu.html#L9'>screen</a>, result-int
<span id="L285" class="LineNr">285 </span> <a href='../405screen.mu.html#L169'>print-string</a> <a href='../405screen.mu.html#L9'>screen</a>, <span class="Constant">"\n"</span>
<span id="L286" class="LineNr">286 </span><span class="Delimiter">}</span>
<span id="L287" class="LineNr">287 </span>
<span id="L288" class="LineNr">288 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='3.mu.html#L288'>print-rgb-raw</a></span> <a href='../405screen.mu.html#L9'>screen</a>: (addr <a href='../405screen.mu.html#L9'>screen</a>), _v: (addr rgb) <span class="Delimiter">{</span>
<span id="L289" class="LineNr">289 </span> <span class="PreProc">var</span> v/<span class="Constant">esi</span>: (addr rgb) <span class="Special"><-</span> copy _v
<span id="L290" class="LineNr">290 </span> <a href='../405screen.mu.html#L169'>print-string</a> <a href='../405screen.mu.html#L9'>screen</a>, <span class="Constant">"("</span>
<span id="L291" class="LineNr">291 </span> <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: (addr float) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v, r
<span id="L292" class="LineNr">292 </span> <a href='../409print-float-hex.mu.html#L118'>print-float-hex</a> <a href='../405screen.mu.html#L9'>screen</a>, *tmp
<span id="L293" class="LineNr">293 </span> <a href='../405screen.mu.html#L169'>print-string</a> <a href='../405screen.mu.html#L9'>screen</a>, <span class="Constant">", "</span>
<span id="L294" class="LineNr">294 </span> tmp <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v, g
<span id="L295" class="LineNr">295 </span> <a href='../409print-float-hex.mu.html#L118'>print-float-hex</a> <a href='../405screen.mu.html#L9'>screen</a>, *tmp
<span id="L296" class="LineNr">296 </span> <a href='../405screen.mu.html#L169'>print-string</a> <a href='../405screen.mu.html#L9'>screen</a>, <span class="Constant">", "</span>
<span id="L297" class="LineNr">297 </span> tmp <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v, b
<span id="L298" class="LineNr">298 </span> <a href='../409print-float-hex.mu.html#L118'>print-float-hex</a> <a href='../405screen.mu.html#L9'>screen</a>, *tmp
<span id="L299" class="LineNr">299 </span> <a href='../405screen.mu.html#L169'>print-string</a> <a href='../405screen.mu.html#L9'>screen</a>, <span class="Constant">")"</span>
<span id="L300" class="LineNr">300 </span><span class="Delimiter">}</span>
<span id="L301" class="LineNr">301 </span>
<span id="L302" class="LineNr">302 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='3.mu.html#L302'>rgb-white</a></span> _c: (addr rgb) <span class="Delimiter">{</span>
<span id="L303" class="LineNr">303 </span> <span class="PreProc">var</span> c/<span class="Constant">esi</span>: (addr rgb) <span class="Special"><-</span> copy _c
<span id="L304" class="LineNr">304 </span> <span class="PreProc">var</span> one/<span class="Constant">eax</span>: int <span class="Special"><-</span> copy <span class="Constant">1</span>
<span id="L305" class="LineNr">305 </span> <span class="PreProc">var</span> one-f/<span class="Constant">xmm0</span>: float <span class="Special"><-</span> convert one
<span id="L306" class="LineNr">306 </span> <span class="PreProc">var</span> dest/<span class="Constant">edi</span>: (addr float) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> c, r
<span id="L307" class="LineNr">307 </span> copy-to *dest, one-f
<span id="L308" class="LineNr">308 </span> dest <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> c, g
<span id="L309" class="LineNr">309 </span> copy-to *dest, one-f
<span id="L310" class="LineNr">310 </span> dest <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> c, b
<span id="L311" class="LineNr">311 </span> copy-to *dest, one-f
<span id="L312" class="LineNr">312 </span><span class="Delimiter">}</span>
<span id="L313" class="LineNr">313 </span>
<span id="L314" class="LineNr">314 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='3.mu.html#L314'>rgb-add-to</a></span> _c1: (addr rgb), _c2: (addr rgb) <span class="Delimiter">{</span>
<span id="L315" class="LineNr">315 </span> <span class="PreProc">var</span> c1/<span class="Constant">edi</span>: (addr rgb) <span class="Special"><-</span> copy _c1
<span id="L316" class="LineNr">316 </span> <span class="PreProc">var</span> c2/<span class="Constant">esi</span>: (addr rgb) <span class="Special"><-</span> copy _c2
<span id="L317" class="LineNr">317 </span> <span class="muComment"># c1.r += c2.r</span>
<span id="L318" class="LineNr">318 </span> <span class="PreProc">var</span> arg1/<span class="Constant">eax</span>: (addr float) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> c1, r
<span id="L319" class="LineNr">319 </span> <span class="PreProc">var</span> arg2/<span class="Constant">ecx</span>: (addr float) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> c2, r
<span id="L320" class="LineNr">320 </span> <span class="PreProc">var</span> result/<span class="Constant">xmm0</span>: float <span class="Special"><-</span> copy *arg1
<span id="L321" class="LineNr">321 </span> result <span class="Special"><-</span> add *arg2
<span id="L322" class="LineNr">322 </span> copy-to *arg1, result
<span id="L323" class="LineNr">323 </span> <span class="muComment"># c1.g += c2.g</span>
<span id="L324" class="LineNr">324 </span> arg1 <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> c1, g
<span id="L325" class="LineNr">325 </span> arg2 <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> c2, g
<span id="L326" class="LineNr">326 </span> result <span class="Special"><-</span> copy *arg1
<span id="L327" class="LineNr">327 </span> result <span class="Special"><-</span> add *arg2
<span id="L328" class="LineNr">328 </span> copy-to *arg1, result
<span id="L329" class="LineNr">329 </span> <span class="muComment"># c1.b += c2.b</span>
<span id="L330" class="LineNr">330 </span> arg1 <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> c1, b
<span id="L331" class="LineNr">331 </span> arg2 <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> c2, b
<span id="L332" class="LineNr">332 </span> result <span class="Special"><-</span> copy *arg1
<span id="L333" class="LineNr">333 </span> result <span class="Special"><-</span> add *arg2
<span id="L334" class="LineNr">334 </span> copy-to *arg1, result
<span id="L335" class="LineNr">335 </span><span class="Delimiter">}</span>
<span id="L336" class="LineNr">336 </span>
<span id="L337" class="LineNr">337 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='3.mu.html#L337'>rgb-scale-up</a></span> _c1: (addr rgb), f: float <span class="Delimiter">{</span>
<span id="L338" class="LineNr">338 </span> <span class="PreProc">var</span> c1/<span class="Constant">edi</span>: (addr rgb) <span class="Special"><-</span> copy _c1
<span id="L339" class="LineNr">339 </span> <span class="muComment"># c1.r *= f</span>
<span id="L340" class="LineNr">340 </span> <span class="PreProc">var</span> dest/<span class="Constant">eax</span>: (addr float) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> c1, r
<span id="L341" class="LineNr">341 </span> <span class="PreProc">var</span> result/<span class="Constant">xmm0</span>: float <span class="Special"><-</span> copy *dest
<span id="L342" class="LineNr">342 </span> result <span class="Special"><-</span> multiply f
<span id="L343" class="LineNr">343 </span> copy-to *dest, result
<span id="L344" class="LineNr">344 </span> <span class="muComment"># c1.g *= f</span>
<span id="L345" class="LineNr">345 </span> dest <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> c1, g
<span id="L346" class="LineNr">346 </span> result <span class="Special"><-</span> copy *dest
<span id="L347" class="LineNr">347 </span> result <span class="Special"><-</span> multiply f
<span id="L348" class="LineNr">348 </span> copy-to *dest, result
<span id="L349" class="LineNr">349 </span> <span class="muComment"># c1.b *= f</span>
<span id="L350" class="LineNr">350 </span> dest <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> c1, b
<span id="L351" class="LineNr">351 </span> result <span class="Special"><-</span> copy *dest
<span id="L352" class="LineNr">352 </span> result <span class="Special"><-</span> multiply f
<span id="L353" class="LineNr">353 </span> copy-to *dest, result
<span id="L354" class="LineNr">354 </span><span class="Delimiter">}</span>
<span id="L355" class="LineNr">355 </span>
<span id="L356" class="LineNr">356 </span><span class="PreProc">type</span> vec3 <span class="Delimiter">{</span>
<span id="L357" class="LineNr">357 </span> x: float
<span id="L358" class="LineNr">358 </span> y: float
<span id="L359" class="LineNr">359 </span> z: float
<span id="L360" class="LineNr">360 </span><span class="Delimiter">}</span>
<span id="L361" class="LineNr">361 </span>
<span id="L362" class="LineNr">362 </span><span class="PreProc">fn</span> <span class="muFunction">print-vec3</span> <a href='../405screen.mu.html#L9'>screen</a>: (addr <a href='../405screen.mu.html#L9'>screen</a>), _v: (addr vec3) <span class="Delimiter">{</span>
<span id="L363" class="LineNr">363 </span> <span class="PreProc">var</span> v/<span class="Constant">esi</span>: (addr vec3) <span class="Special"><-</span> copy _v
<span id="L364" class="LineNr">364 </span> <a href='../405screen.mu.html#L169'>print-string</a> <a href='../405screen.mu.html#L9'>screen</a>, <span class="Constant">"("</span>
<span id="L365" class="LineNr">365 </span> <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: (addr float) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v, x
<span id="L366" class="LineNr">366 </span> <a href='../409print-float-hex.mu.html#L118'>print-float-hex</a> <a href='../405screen.mu.html#L9'>screen</a>, *tmp
<span id="L367" class="LineNr">367 </span> <a href='../405screen.mu.html#L169'>print-string</a> <a href='../405screen.mu.html#L9'>screen</a>, <span class="Constant">", "</span>
<span id="L368" class="LineNr">368 </span> tmp <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v, y
<span id="L369" class="LineNr">369 </span> <a href='../409print-float-hex.mu.html#L118'>print-float-hex</a> <a href='../405screen.mu.html#L9'>screen</a>, *tmp
<span id="L370" class="LineNr">370 </span> <a href='../405screen.mu.html#L169'>print-string</a> <a href='../405screen.mu.html#L9'>screen</a>, <span class="Constant">", "</span>
<span id="L371" class="LineNr">371 </span> tmp <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v, z
<span id="L372" class="LineNr">372 </span> <a href='../409print-float-hex.mu.html#L118'>print-float-hex</a> <a href='../405screen.mu.html#L9'>screen</a>, *tmp
<span id="L373" class="LineNr">373 </span> <a href='../405screen.mu.html#L169'>print-string</a> <a href='../405screen.mu.html#L9'>screen</a>, <span class="Constant">")"</span>
<span id="L374" class="LineNr">374 </span><span class="Delimiter">}</span>
<span id="L375" class="LineNr">375 </span>
<span id="L376" class="LineNr">376 </span><span class="PreProc">fn</span> <span class="muFunction">vec3-add-to</span> _v1: (addr vec3), _v2: (addr vec3) <span class="Delimiter">{</span>
<span id="L377" class="LineNr">377 </span> <span class="PreProc">var</span> v1/<span class="Constant">edi</span>: (addr vec3) <span class="Special"><-</span> copy _v1
<span id="L378" class="LineNr">378 </span> <span class="PreProc">var</span> v2/<span class="Constant">esi</span>: (addr vec3) <span class="Special"><-</span> copy _v2
<span id="L379" class="LineNr">379 </span> <span class="muComment"># v1.x += v2.x</span>
<span id="L380" class="LineNr">380 </span> <span class="PreProc">var</span> arg1/<span class="Constant">eax</span>: (addr float) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v1, x
<span id="L381" class="LineNr">381 </span> <span class="PreProc">var</span> arg2/<span class="Constant">ecx</span>: (addr float) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v2, x
<span id="L382" class="LineNr">382 </span> <span class="PreProc">var</span> result/<span class="Constant">xmm0</span>: float <span class="Special"><-</span> copy *arg1
<span id="L383" class="LineNr">383 </span> result <span class="Special"><-</span> add *arg2
<span id="L384" class="LineNr">384 </span> copy-to *arg1, result
<span id="L385" class="LineNr">385 </span> <span class="muComment"># v1.y += v2.y</span>
<span id="L386" class="LineNr">386 </span> arg1 <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v1, y
<span id="L387" class="LineNr">387 </span> arg2 <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v2, y
<span id="L388" class="LineNr">388 </span> result <span class="Special"><-</span> copy *arg1
<span id="L389" class="LineNr">389 </span> result <span class="Special"><-</span> add *arg2
<span id="L390" class="LineNr">390 </span> copy-to *arg1, result
<span id="L391" class="LineNr">391 </span> <span class="muComment"># v1.z += v2.z</span>
<span id="L392" class="LineNr">392 </span> arg1 <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v1, z
<span id="L393" class="LineNr">393 </span> arg2 <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v2, z
<span id="L394" class="LineNr">394 </span> result <span class="Special"><-</span> copy *arg1
<span id="L395" class="LineNr">395 </span> result <span class="Special"><-</span> add *arg2
<span id="L396" class="LineNr">396 </span> copy-to *arg1, result
<span id="L397" class="LineNr">397 </span><span class="Delimiter">}</span>
<span id="L398" class="LineNr">398 </span>
<span id="L399" class="LineNr">399 </span><span class="PreProc">fn</span> <span class="muFunction">vec3-subtract-from</span> v1: (addr vec3), v2: (addr vec3) <span class="Delimiter">{</span>
<span id="L400" class="LineNr">400 </span> <span class="PreProc">var</span> tmp-storage: vec3
<span id="L401" class="LineNr">401 </span> <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: (addr vec3) <span class="Special"><-</span> address tmp-storage
<span id="L402" class="LineNr">402 </span> copy-object v2, tmp
<span id="L403" class="LineNr">403 </span> vec3-negate tmp
<span id="L404" class="LineNr">404 </span> vec3-add-to v1, tmp
<span id="L405" class="LineNr">405 </span><span class="Delimiter">}</span>
<span id="L406" class="LineNr">406 </span>
<span id="L407" class="LineNr">407 </span><span class="PreProc">fn</span> <span class="muFunction">vec3-negate</span> v: (addr vec3) <span class="Delimiter">{</span>
<span id="L408" class="LineNr">408 </span> <span class="PreProc">var</span> negative-one/<span class="Constant">eax</span>: int <span class="Special"><-</span> copy <span class="Constant">-1</span>
<span id="L409" class="LineNr">409 </span> <span class="PreProc">var</span> negative-one-f/<span class="Constant">xmm0</span>: float <span class="Special"><-</span> convert negative-one
<span id="L410" class="LineNr">410 </span> vec3-scale-up v, negative-one-f
<span id="L411" class="LineNr">411 </span><span class="Delimiter">}</span>
<span id="L412" class="LineNr">412 </span>
<span id="L413" class="LineNr">413 </span><span class="PreProc">fn</span> <span class="muFunction">vec3-scale-up</span> _v: (addr vec3), f: float <span class="Delimiter">{</span>
<span id="L414" class="LineNr">414 </span> <span class="PreProc">var</span> v/<span class="Constant">edi</span>: (addr vec3) <span class="Special"><-</span> copy _v
<span id="L415" class="LineNr">415 </span> <span class="muComment"># v.x *= f</span>
<span id="L416" class="LineNr">416 </span> <span class="PreProc">var</span> dest/<span class="Constant">eax</span>: (addr float) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v, x
<span id="L417" class="LineNr">417 </span> <span class="PreProc">var</span> result/<span class="Constant">xmm0</span>: float <span class="Special"><-</span> copy *dest
<span id="L418" class="LineNr">418 </span> result <span class="Special"><-</span> multiply f
<span id="L419" class="LineNr">419 </span> copy-to *dest, result
<span id="L420" class="LineNr">420 </span> <span class="muComment"># v.y *= f</span>
<span id="L421" class="LineNr">421 </span> dest <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v, y
<span id="L422" class="LineNr">422 </span> result <span class="Special"><-</span> copy *dest
<span id="L423" class="LineNr">423 </span> result <span class="Special"><-</span> multiply f
<span id="L424" class="LineNr">424 </span> copy-to *dest, result
<span id="L425" class="LineNr">425 </span> <span class="muComment"># v.z *= f</span>
<span id="L426" class="LineNr">426 </span> dest <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v, z
<span id="L427" class="LineNr">427 </span> result <span class="Special"><-</span> copy *dest
<span id="L428" class="LineNr">428 </span> result <span class="Special"><-</span> multiply f
<span id="L429" class="LineNr">429 </span> copy-to *dest, result
<span id="L430" class="LineNr">430 </span><span class="Delimiter">}</span>
<span id="L431" class="LineNr">431 </span>
<span id="L432" class="LineNr">432 </span><span class="PreProc">fn</span> <span class="muFunction">vec3-scale-down</span> _v: (addr vec3), f: float <span class="Delimiter">{</span>
<span id="L433" class="LineNr">433 </span> <span class="PreProc">var</span> v/<span class="Constant">edi</span>: (addr vec3) <span class="Special"><-</span> copy _v
<span id="L434" class="LineNr">434 </span> <span class="muComment"># v.x /= f</span>
<span id="L435" class="LineNr">435 </span> <span class="PreProc">var</span> dest/<span class="Constant">eax</span>: (addr float) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v, x
<span id="L436" class="LineNr">436 </span> <span class="PreProc">var</span> result/<span class="Constant">xmm0</span>: float <span class="Special"><-</span> copy *dest
<span id="L437" class="LineNr">437 </span> result <span class="Special"><-</span> divide f
<span id="L438" class="LineNr">438 </span> copy-to *dest, result
<span id="L439" class="LineNr">439 </span> <span class="muComment"># v.y /= f</span>
<span id="L440" class="LineNr">440 </span> dest <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v, y
<span id="L441" class="LineNr">441 </span> result <span class="Special"><-</span> copy *dest
<span id="L442" class="LineNr">442 </span> result <span class="Special"><-</span> divide f
<span id="L443" class="LineNr">443 </span> copy-to *dest, result
<span id="L444" class="LineNr">444 </span> <span class="muComment"># v.z /= f</span>
<span id="L445" class="LineNr">445 </span> dest <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v, z
<span id="L446" class="LineNr">446 </span> result <span class="Special"><-</span> copy *dest
<span id="L447" class="LineNr">447 </span> result <span class="Special"><-</span> divide f
<span id="L448" class="LineNr">448 </span> copy-to *dest, result
<span id="L449" class="LineNr">449 </span><span class="Delimiter">}</span>
<span id="L450" class="LineNr">450 </span>
<span id="L451" class="LineNr">451 </span><span class="PreProc">fn</span> <span class="muFunction">vec3-unit</span> in: (addr vec3), out: (addr vec3) <span class="Delimiter">{</span>
<span id="L452" class="LineNr">452 </span> <span class="PreProc">var</span> len/<span class="Constant">xmm0</span>: float <span class="Special"><-</span> vec3-length in
<span id="L453" class="LineNr">453 </span><span class="CommentedCode">#? print-string 0, "len: "</span>
<span id="L454" class="LineNr">454 </span><span class="CommentedCode">#? print-float-hex 0, len</span>
<span id="L455" class="LineNr">455 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L456" class="LineNr">456 </span> copy-object in, out
<span id="L457" class="LineNr">457 </span> vec3-scale-down out, len
<span id="L458" class="LineNr">458 </span><span class="Delimiter">}</span>
<span id="L459" class="LineNr">459 </span>
<span id="L460" class="LineNr">460 </span><span class="PreProc">fn</span> <span class="muFunction">vec3-length</span> v: (addr vec3)<span class="PreProc"> -> </span>_/<span class="Constant">xmm0</span>: float <span class="Delimiter">{</span>
<span id="L461" class="LineNr">461 </span> <span class="PreProc">var</span> result/<span class="Constant">xmm0</span>: float <span class="Special"><-</span> vec3-length-squared v
<span id="L462" class="LineNr">462 </span> result <span class="Special"><-</span> square-root result
<span id="L463" class="LineNr">463 </span> <span class="PreProc">return</span> result
<span id="L464" class="LineNr">464 </span><span class="Delimiter">}</span>
<span id="L465" class="LineNr">465 </span>
<span id="L466" class="LineNr">466 </span><span class="PreProc">fn</span> <span class="muFunction">vec3-length-squared</span> _v: (addr vec3)<span class="PreProc"> -> </span>_/<span class="Constant">xmm0</span>: float <span class="Delimiter">{</span>
<span id="L467" class="LineNr">467 </span> <span class="PreProc">var</span> v/<span class="Constant">esi</span>: (addr vec3) <span class="Special"><-</span> copy _v
<span id="L468" class="LineNr">468 </span> <span class="muComment"># result = v.x * v.x</span>
<span id="L469" class="LineNr">469 </span> <span class="PreProc">var</span> src/<span class="Constant">eax</span>: (addr float) <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v, x
<span id="L470" class="LineNr">470 </span> <span class="PreProc">var</span> tmp/<span class="Constant">xmm1</span>: float <span class="Special"><-</span> copy *src
<span id="L471" class="LineNr">471 </span> tmp <span class="Special"><-</span> multiply tmp
<span id="L472" class="LineNr">472 </span> <span class="PreProc">var</span> result/<span class="Constant">xmm0</span>: float <span class="Special"><-</span> copy tmp
<span id="L473" class="LineNr">473 </span> <span class="muComment"># result += v.y * v.y</span>
<span id="L474" class="LineNr">474 </span> src <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v, y
<span id="L475" class="LineNr">475 </span> tmp <span class="Special"><-</span> copy *src
<span id="L476" class="LineNr">476 </span> tmp <span class="Special"><-</span> multiply tmp
<span id="L477" class="LineNr">477 </span> result <span class="Special"><-</span> add tmp
<span id="L478" class="LineNr">478 </span> <span class="muComment"># result += v.z * v.z</span>
<span id="L479" class="LineNr">479 </span> src <span class="Special"><-</span> <a href='../131table.subx.html#L26'>get</a> v, z
<span id="L480" class="LineNr">480 </span> tmp <span class="Special"><-</span> copy *src
<span id="L481" class="LineNr">481 </span> tmp <span class="Special"><-</span> multiply tmp
<span id="L482" class="LineNr">482 </span> result <span class="Special"><-</span> add tmp
<span id="L483" class="LineNr">483 </span> <span class="PreProc">return</span> result
<span id="L484" class="LineNr">484 </span><span class="Delimiter">}</span>
</pre>
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