[question] How does Rotation component's set method work (from Position#set)?

[trusktr]

It doesn't line up with Node#setRotation's ability to accept a quaternion. How do we set a quaternion with Rotation#set inherited from Position#set?

[alexanderGugel]

The rotation component converts the node rotation from a quaternion to euler angles and then operates on those. Therefore it won't give you smooth rotations. If you want to a slerp, you can use the Transitionable directly through a custom component. Transitionables accept a method argument for that: https://github.com/Famous/engine/blob/master/transitions/Transitionable.js#L115

[trusktr]

@alexanderGugel In what format does Node#getRotation return a quaternion, [w,x,y,z] or [x,y,z,w]?

Just curious because I'm gonna do something like this:

                    let goToRotation = cardFamousNode.goToNode.getRotation()
                    let euler = new Vec3()
                    new Quaternion(
                        goToRotation[0], goToRotation[1], goToRotation[2], goToRotation[3]
                    ).toEuler(euler)
                    cardRotation.set(euler[0], euler[1], euler[2], {
                        duration: 2000,
                        curve: 'inOutExpo'
                    }, function() {

I was just curious because the order of args in Node#setRotation is inconsistent with Quaternion#constructor.

[trusktr]

I can't get it to work. I'm also trying

                    new Quaternion(
                        goToRotation[3], goToRotation[0], goToRotation[1], goToRotation[2]
                    ).toEuler(euler)

in the previous example. If I just use

cardRotation.set(goToRotation[0], goToRotation[1], goToRotation[2], {

then it works, but when I rotate the containing view away from [0,0,0] then all the rotations are funky.

[alexanderGugel]

It's [x, y, z, w] (https://github.com/Famous/engine/blob/master/core/Node.js#L256).

Nodes don't use the Quaternion class. Just pass in x, y, z, w as arguments explicitly (Node#setRotation(x, y, z, w)).

Feel free to reopen.