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<a href='https://github.com/akkartik/mu/blob/master/apps/raytracing/ray.mu'>https://github.com/akkartik/mu/blob/master/apps/raytracing/ray.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="PreProc">type</span> ray <span class="Delimiter">{</span>
<span id="L2" class="LineNr"> 2 </span> orig: vec3 <span class="muComment"># point</span>
<span id="L3" class="LineNr"> 3 </span> dir: vec3
<span id="L4" class="LineNr"> 4 </span><span class="Delimiter">}</span>
<span id="L5" class="LineNr"> 5 </span>
<span id="L6" class="LineNr"> 6 </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="L7" class="LineNr"> 7 </span><span class="muComment"># We immediately normalize the direction vector so we don't have to keep doing</span>
<span id="L8" class="LineNr"> 8 </span><span class="muComment"># so.</span>
<span id="L9" class="LineNr"> 9 </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="L10" class="LineNr">10 </span> <span class="PreProc">var</span> self/<span class="Constant">esi</span>: (addr ray) <span class="SpecialChar"><-</span> copy _self
<span id="L11" class="LineNr">11 </span> <span class="PreProc">var</span> dest/<span class="Constant">eax</span>: (addr vec3) <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> self, orig
<span id="L12" class="LineNr">12 </span> copy-object o, dest
<span id="L13" class="LineNr">13 </span> dest <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> self, dir
<span id="L14" class="LineNr">14 </span> vec3-unit d, dest
<span id="L15" class="LineNr">15 </span><span class="Delimiter">}</span>
<span id="L16" class="LineNr">16 </span>
<span id="L17" class="LineNr">17 </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="L18" class="LineNr">18 </span> <span class="PreProc">var</span> self/<span class="Constant">esi</span>: (addr ray) <span class="SpecialChar"><-</span> copy _self
<span id="L19" class="LineNr">19 </span> <span class="PreProc">var</span> src/<span class="Constant">eax</span>: (addr vec3) <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> self, dir
<span id="L20" class="LineNr">20 </span> copy-object src, out
<span id="L21" class="LineNr">21 </span> vec3-scale-up out, t
<span id="L22" class="LineNr">22 </span> src <span class="SpecialChar"><-</span> <a href='../../131table.subx.html#L26'>get</a> self, orig
<span id="L23" class="LineNr">23 </span> vec3-add-to out, src
<span id="L24" class="LineNr">24 </span><span class="Delimiter">}</span>
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