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Transformation between Webcam and Main camera?

Hi everyone,

I am currently doing some rendering stuff with HoloLens. I use Unity photoCaptureFrame.TryGetCameraToWorldMatrix to get the location of the webcam in the world coordinate. According to the Windows document, the main camera in unity is the tracked spatial locator and is used for rendering. I would expect this relates to some point in hardware. Its location can is obtained by Camera.main.transform.position or Camera.main.GetStereoViewMatrix(Camera.StereoscopicEye.Left) for stereo view. I can also get the projection matrix by GetStereoProjectionMatrix and it's a constant matrix. However, the relative transformation between the webcam viewpoint and main cam viewpoint is not constant. (But transformation between left and right rendering cam is constant as expected) Did I do something wrong? Thanks so much!


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