arrow measurement

Posted by rustyconc on Jun 18, 2010; 11:31pm
URL: http://imagej.273.s1.nabble.com/arrow-measurement-tp3687888.html

Hi,

I'm looking for a way to measure locations and angles in an image.
Ideally, I would be able to click and drag an arrow from one location to another to create an arrow or line selection.  The measures I'm after would be start position and angle.  Length would likely also be useful in the future, and end position could also work since a little trig could calculate the angle.

Using the line select tool doesn't work for this, since the start and end locations are swapped in the results table, depending on their relative locations.  What I need is the first clicked location to consistently show up in one column in the results window, and the second clicked location in another column.  To help with alignment, it is critical for the line to be visible while selecting the second point (so just selecting two points won't work).  

I've done a few searches and haven't come up with anything that works well.  Any suggestions?

Thanks in advance,
Russell