Set centre point

[Richlear]

Hi all, new user here!

I have a point cloud which is a laser scan of some sensors on a mounting plate. I need to measure the offsets in X, Y and Z from a reference point which is the centre of one of the sensors to each of the other sensors.

So, I would like to be able to nominate a point or even better, a location I define as 0,0,0 then be able to measure other points as dX, dY, dZ from that.

Any suggestions on the easiest way to achieve this?

thanks very much

rich

[daniel]

If you have a known point (let's assume its coordinates are X0, Y0 and Z0) then you can simply translate the other points so that this point goes to (0, 0, 0): select the cloud, then use 'Edit > Apply transformation' and input (-X0, -Y0, -Z0) as translation in the second tab of the tool.

Once you have translated the cloud, you can simply spawn labels on each point (with SHIFT+left click) or export the cloud as an ASCII file to read all the (shifted) coordinates at once.

[Richlear]

Thanks Daniel.

is it possible to do a shift like this to a location where there is no physical point? (centre of a cylinder for instance)

Thanks

rich

[daniel]

As long as you know the coordinates of this point, yes.

For a cylinder, I guess looking at the center of its boudning-box should be sufficient?