On Tuesday, 6 June 2023 21:07:07 BST G. Branden Robinson wrote: > \D'a hc hv h v' > Draw circular arc centered at (hc, vc) from the drawing position > to (h, v).
Hi Branden, I'm not sure if this is relevent but have you seen the comment in the routine adjust_arc_center (geometry.cpp) which has this comment:- // We move the center along a line parallel to the line between // the specified start point and end point so that the center // is equidistant between the start and end point. // It can be proved (using Lagrange multipliers) that this will // give the point nearest to the specified center that is equidistant // between the start and end point. This gave me a big headache when trying to make gropdf produce the same arcs as grops, until I found this comment, since I was using the given centre rather than the adjusted centre to draw the arc! I don't know how relevant this is to the documentation, I am definitely not a maths savant, the special school I went to saw little point in giving us an academic education. Cheers Deri
