An interactive introduction to rotors from geometric algebra (2018)

Related. Others?<p><i>Let&#x27;s remove Quaternions from every 3D Engine (2018)</i> - <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=29512302">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=29512302</a> - Dec 2021 (38 comments)<p><i>Let&#x27;s remove quaternions from every 3D engine (2018)</i> - <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=22200260">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=22200260</a> - Jan 2020 (326 comments)<p><i>Let&#x27;s remove Quaternions from every 3D Engine</i> - <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=18365433">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=18365433</a> - Nov 2018 (175 comments)

I&#x27;m pretty soft on this subject but one thing that&#x27;s always bugged me when I see bivectors represented as a parallelograms is that different coplanar parallelograms of the same area are the same bivector algebraically but visually very different. It just feels confusing when you&#x27;re trying to learn what it &quot;is&quot;.