another way to understand 3D rotation is using geometric algebra, which regard a 3D rotation with 2 reflections within an angle in the reflection planes. It's v

another way to understand 3D rotation is using geometric algebra, which regard a 3D rotation with 2 reflections within an angle in the reflection planes. It's very interesting and also available calculating with 3D vectors. https://marctenbosch.com/quaternions/#h_5 https://marctenbosch.com/quaternions/#h_5 https://www.bilibili.com/video/BV1Ey4y1P782/?vd_source=856977e0dfd83a275bdad8d030c9115d https://www.bilibili.com/video/BV1Ey4y1P782/?vd_source=85697...