Hi there! I did some research about this topic on this forum and in general. The subject was discussed here before but with no-code solutions for 3D. I like to address that topic again with the hope to find an easy solution that can help me and the following to come. Let’s say I like to create a B…

Hello, I may not have the exact solution, but you may find a simple workaround using these few lines of code: Say you want to rotate something to face a normalized vector, v rotateY(atan2(-v.x,-v.z)); rotateX(asin(-v.y)); works great for images that always face the camera

For very limited cases, you can hack 3D rotation using PVector and hope that you don’t run into gimbal lock. As soon as you need something general-purpose, though, representing rotation state in terms of xyz has lots of known problems. Instead, use quaternions. They are complicated and it is a pain…

Thankyou for the good answer, jeremy! I intend to study the suggested peasycam example. For now, i have aimed my predatory cone using bennyhackers code. I had to use acos instead of asin. I have so much to learn, as i would like to work with vr.

As @jeremydouglass points out the best solution is to use quaternions because they are flexible, powerful and don’t exhibit gimbol lock. Now having said that there are a number of caveats with using quaternions and using them with Processing. Creating your own quaternion class is a possibility prov…

Hello, Some additional resources: [image] 3D Rotations in Processing (Vectors, Matrices, Quaternions) This tutorial introduces how to rotate objects in 3D beyond Euler angles; to do this, it looks at the basics of matrices and quaternions… Reading time: 19 min read …

Rotate vectors in 3D

Processing Coding Questions

jeremydouglass May 5, 2020, 3:36pm 6

Wow, what a great answer, @quark. Sharing this kind of in-depth project experience is invaluable.

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Rotate vectors in 3D

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