With three.js, I use a quaternion to rotate an arrow (located on the unit sphere). I have a complete script in this link: https://jsfiddle.net/PhilipZhu/937wov02/1/ Most of the codes are for setups. The relavant parts are typed below: // define a quaternion let u = -0.3; // scaling factor of non…

I followed the math process inside Three.js with a simple test. Assume we have point (1,0,0) and quaternion (x,y,z,w). Quaternioning the point as if it is THREE.Vector3 uses directly applyQuaternion and the transformed vector is: (ww+xx-zz-yy, 2xy+2zw, 2xz-2yw ). When the point is quaternioned as i…

How does three.js handle rotations by non-unit quaternions?

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hofk June 1, 2023, 7:50pm 6

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How does three.js handle rotations by non-unit quaternions?

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