Scale bar

Hi Marco,

itkwidgets has a very nice scale bar functionality (see screenshot below, the number changes depending on how zoomed in you are), is there something similar in vedo? I know that there’s an axis option that shows a ruler at the bottom of the screen, but I could never quite figure out if it would work as a scale bar. Also in general I’d prefer something small like in the the screenshot.

I guess it would be possible to hack something like this using a 2d scale bar, but was wandering if you had already something set up for it.

To be clear: what I’d like is something that maps the length of a line in number of pixels in the window to what that corresponds to in the scene in terms of distance between two points. So I don’t want a ruler that just shows the distance between two points. Say that the scalebar line is 100px long, if I’m very zoomed out that could be equal to a distance of 1000 between two points, but once I zoom in a lot the same line shows the distance betwee two points that are say 50 apart, makes sense?

[marcomusy]

what are the issues?

many 😃

• the wheel does not trigger an interaction
• the mapper seems to render badly the polygonal text
• merging the polydatas is probably a bad idea because I cannot then modify the width of the line

[marcomusy]

Use settings.useParallelProjection=True