How to calculate camera roll...
I have hopefully a simple question regarding calculating the roll of a camera.
I can calculate the yaw and pitch just fine using GLM:
CameraAxis = glm::cross(DirectionOfWhereCameraIsFacing, DirectionOfUpForPerson);
CameraQuatPitch = glm::angleAxis(CurrentCameraViewingSettings.Pitch, CameraAxis);
CameraQuatYaw = glm::angleAxis(CurrentCameraViewingSettings.Yaw, DirectionOfUpForPerson);
The first problem is calculating the roll of the camera. I tried this but my math is off as this doesn't work:
CameraQuatRoll = glm::angleAxis(CurrentCameraViewingSettings.Roll, CameraAxis);
This seems to me like another pitch calculation.
The second piece is accuratly combining the changed roll to find out where the camera is finally facing.
I do this for the yaw and pitch above by doing the following below:
CameraQuatBothPitchAndYaw = glm::cross(CameraQuatPitch, CameraQuatYaw);
CameraQuatBothPitchAndYaw = glm::normalize(CameraQuatBothPitchAndYaw);
DirectionOfWhereCameraIsFacing = glm::rotate(CameraQuatBothPitchAndYaw, DirectionOfWhereCameraIsFacing);
How do I also incorporate roll into this?
Thank you for your time.