Hmm sure. I was thinking more of selecting one block is selected and a second one is selected and the tool measures the selected dimensions and outputs the measurement in a message (like how error messages display as a box at the top left of the view) in a length/width/height in blocks format.
So basically you are looking for not linear distance, but X,Y,Z for advance copy pasting? Would it maybe make mores since to make it so you can just copy an area and/or set your tool size using two corners so you can skip intermediate steps, or are their other uses you would want for this tool.
Linear measurement can be a thing with this tool just as long as two dimensions remain the same size (a line would be usually one block) while selecting so the tool can function as both.
That's an interesting idea. Maybe if ctrl + left click is used to place the second selection point the measured dimensions will be copied directly to the placement dimensions? That could also save a few more seconds of building. Some uses for the tool I've been thinking about is measuring the size of templates so they can be pasted later or measuring out scaffolding etc.
