How do I generate a quaternion from euler angles?

[badasahog]

I want to get a quaternion based on roll, pitch, and yaw, but as far as I can tell there is no function for this.

The only functions I could find were based on a unit vector and an angle (glm_quatv, glm_quat)

glm provides this functionality in the form of the glm::quat(glm::vec3) constructor

[recp]

Hi @badasahog,

Sorry for the delay,

It could be nice to have this feature in cglm too. I had tried to update Euler with #128 but couldn't finished that PR yet,

We can have this before that,

Any PR would be awesome otherwise I added to TODOs. 🙂

[Nonesence999]

Yes It would be amazing I also need a quat structure for my project.

[telephone001]

Sorry for answering very late, but for anyone else who needs help in the future, you could try making a function that rotates the quaternion by each axis. I guess you could also try and push it to the repository even though it might not be optimal

// example for rotating the quaternion by the y axis by an angle:

// y axis
vec3s axis = {0, 1, 0};

// creates a quaternion with the angle and axis
versors rotation = glms_quatv(angle, axis);

// when multiplying this rotation with an angular position quaternion, it will apply the rotation to the angular position
angular_position = glms_quat_mul(rotation, angular_position);

[recp]

@telephone001 many thanks, hope we add this asap 🚀

[telephone001]

do you think glm_quate_xyz or glm_quat_euler_xyz would be a better name for this new function?

[recp]

To convert Euler to Quat, I would use glm_euler_[x|y|z]_quat which is similar pattern used in cglm e.g. glm_mat4_quat() convert mat4 to quat.

glm_SRC_DST()

[telephone001]

Alright thanks for the response. I'll try and get this done soon

[recp]

@telephone001 thanks 🤗

[telephone001]

@recp
Finished making it and all my tests pass on my computer, but it fails using meson webassembly for some reason. I think I did everything I needed though (exported it in call/quat, made struct versions of it, declared and entered tests) Do I need to add anything in the wasmfiles?

[recp]

Thanks for the implementation a PR would be nice to see,

it fails using meson webassembly for some reason.

https://github.com/recp/cglm/actions seems fine, may I ask what are the errors? Also can you pull latest commits and try again? there was an issue about #360 (comment) but fixed later.

[telephone001]

I created a pr and most tests failed. The error is just that all tests fail on certain builds.