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I'm trying to 'add' two angles in 3D spherical coords. The problem is easy enough in 2D polar coords. You just add Angle A to Angle B (both in the Z plane of course). However, there doesn't seem to be an easy 3D equivalent.

Let's use this example:

Point A is:

Rot x: 0 (degrees)

Rot z: 90

Radius: 1

Point B is:

Rot x: 90

Rot z: 0

Radius: 1

In cartesian format, these points A & B translate to 0,1,0 and 0,0,1 respectively.

How do I 'add' these angles together? Any solutions I've found seem to arrive at answer that is still at Point A or Point B, rather than a different position.

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# Adding together 3D angles

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