Manual Zero Point - Full UI

This method involves manually selecting a tracking point and then optionally offsetting it's position using a combination of hotkeys.

It is conducted using the Image Modeling Tab

Use the cursor (LMB) to select a tracking point in one of the witness camera views, the matching point should be displayed in the opposite view, this should be checked to ensure that the point you are selecting is consistent. If they are not then a different point should be selected.

A ground plane will be displayed when hovering over a tracking point, this will inform the user of both the floor plane and the distance the point is in space, the ground plane guide displays a grid of 1m dimensions.

Once a point is selected then pressing "Spacebar" or choosing "Set Origin" from the UI will snap the zero point to the selected tracking point.

The zero point can be refined further by using a series of hot keys, the most common of which are:

Z - To slide the zero point along the current ground plane

Alt + X - To rotate the zero point around the up axis

When the tracking is initialised, the system takes a reading from the accelorometer inside the camera bar to make an estimation of what "up" is, and consequently the ground plane.

If the camera bar is moving when the tracking is initialised then it is likely the floor plane will be misaligned. To aid with visualising this, the ground plane is displayed when hovering the cursor over a tracking point. Pressing F9 at any point will tell the system to realign the up vector

These are pairs of images taken at set intervals as the camera is moved throughout the environment. Upon starting the tracking, the first pair of key positions is displayed in the image modelling tab by default, it is typically advantageous to scroll through available key positions however to see if there are views more useful to work with

Care should be taken when adjusting the zero point, as more and more offsets are applied it becomes increasingly likely that the zero point will become misrepresented in 3D space. That is to say it may look correct from the single view that you are adjusting it from, but may be set much closer or further away. It is advised to: