We have decided to phase out the Mixed Reality Forums over the next few months in favor of other ways to connect with us.
The first way we want to connect with you is our mixed reality developer program, which you can sign up for at https://aka.ms/IWantMR.
The plan between now and the beginning of May is to clean up old, unanswered questions that are no longer relevant. The forums will remain open and usable.
On May 1st we will be locking the forums to new posts and replies. They will remain available for another three months for the purposes of searching them, and then they will be closed altogether on August 1st.
So, where does that leave our awesome community to ask questions? Well, there are a few places we want to engage with you. For technical questions, please use Stack Overflow, and tag your questions using either hololens or windows-mixed-reality. If you want to join in discussions, please do so in the HoloDevelopers Slack, which you can join by going to https://aka.ms/holodevelopers. And always feel free to hit us up on Twitter @MxdRealityDev.
Extrinsic transformation between Hololens 'origin' and locatable RGB camera?
For a project of mine, I am needing to know the precise rotation and translation between the HoloLens' locatable camera and the 'origin' point of the HoloLens device (i.e. the location in Unity where the virtual Main Camera is). I can use the PhotoCameraFrame class to get the transform between the locatable camera and the world-space origin of the spatial mesh, but this doesn't give me the transform between the camera and the HoloLens origin.
I have already tried placing the HoloLens in a fixed location and querying both the locatable-camera-to-world and the HoloLens-origin-to-world matrices, but because these queries are not synchronized and there is small variation over time in the estimation of these matrices, I am getting small changes in the locatable-camera-to-HoloLens-origin matrix.
This is info that I would think should be directly accessible in some documentation. Does anyone know where I could find it?