In solving the problem I posed in perl for graphing Euclidean geometry, I came across the following problem.

When you draw a graph, say, even a simple one like a triangle, if you want to label the vertices, it's not straight forward to decide where to put the labels so as not to intersect with the lines. In this particular case, it's not that hard to find a half plane at a vertex that has no lines in it, one can then get a nice box for the label. For a more complicated graph with more than a couple of lines and vertices, is there a good algorithm for finding the right location for a label? I guess there can't be a complete solution, after all, there can be so many lines at a point where it just doesn't leave any space big enough for a label. But are there solutions that work in most of cases? Thanks.

In reply to Finding the best spot to put a label in a graph by johnnywang

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