Reset Orientation and Position

[ifero]

Hey,

I was curiose to know if did you thought about a function that reset orientation and position in blueprint instead of only getting the data.

Thanks

Andrea

[cboulay]

This is something generally interesting so it should end up in code in the plugin. But first I'm working on coregistration with the Oculus Rift DK2 HMD.

In the meantime, you can try something like the following:

• Create two variables: (Float) yaw_offset and (Vector3) pos_offset
• On level start set yaw_offset and pos_offset to zeroes.
• On each tick
  • Monitor the PSMove buttons.
  • Whenever Select is pressed, set yaw_offset and pos_offset with the raw values from the PSMove.
  • Break out the rotator into Euler angles, subtract yaw_offset from the yaw, then rebuild the rotator
  • Subtract pos_offset from the new position.

If you do try this out, I'd like to know what worked for you. It'll make it faster for me to put it into the plugin. (Edited to use yaw only)

[ifero]

Ok, it was my idea from the beginning. I was just curiose to know if you had already implemented it.

Tomorrow I'll work on it and I'll let you know

Thanks man

[cboulay]

I should add that you probably don't really want to reset the full orientation. You probably just want to reset the Yaw. I edited the above description to use Yaws. Breaking a Rotator out into Euler angles will lead to singularities, so really this should be done in code with the quaternions. In fact, I think I will implement this in the psmoveapi.

[ifero]

I've created a UFUNCTION in my character c++ class, It work like a charm for resetting FRotator.Yaw

FRotator setPSMoveRotationWithOffset (FRotator PSMoveRotation, float yawOffset) { if (yawOffset > 0) { if (PSMoveRotation.Yaw >= (-180 + yawOffset)) { PSMoveRotation.Yaw -= yawOffset; } else { PSMoveRotation.Yaw = 360 - yawOffset + PSMoveRotation.Yaw; } } else { if (PSMoveRotation.Yaw <= (180 + yawOffset)) { PSMoveRotation.Yaw -= yawOffset; } else { PSMoveRotation.Yaw = -360 - yawOffset + PSMoveRotation.Yaw; } } return PSMoveRotation; }

However it could be nice to receive also the data of the quaternion and not only the rotator.

I would like to help you improving the code, I'll contact you by mail one of this days

[cboulay]

From my searches through AnswerHub and the Unreal Engine forums, it seems Epic purposely does not want Quaternions exposed to Blueprints. I agree I would like access to the Quaternions in Blueprints too. It would have made it much easier to figure out commit 683bf04b218e14e2657bc71564c8dadb5407d51d.

[cboulay]

This was addressed in ad55b9814e6c2a20a0087da2294fec488ac4d7a5

See the image at the bottom of the wiki page.