From 36da1fd68bcfb44957d370584231545cee0b2e20 Mon Sep 17 00:00:00 2001 From: jaseg Date: Thu, 26 Oct 2023 23:53:23 +0200 Subject: Fix failing test cases --- gerbonara/cad/kicad/primitives.py | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'gerbonara/cad/kicad/primitives.py') diff --git a/gerbonara/cad/kicad/primitives.py b/gerbonara/cad/kicad/primitives.py index 74ce4e4..fa55568 100644 --- a/gerbonara/cad/kicad/primitives.py +++ b/gerbonara/cad/kicad/primitives.py @@ -59,6 +59,31 @@ def center_arc_to_kicad_mid(center, start, end): return XYCoord(mx, my) +def kicad_mid_to_center_arc(mid, start, end): + """ Convert kicad's slightly insane midpoint notation to standrad center/p1/p2 notation. + + Returns the center and radius of the circle passing the given 3 points. + In case the 3 points form a line, raises a ValueError. + """ + # https://stackoverflow.com/questions/28910718/give-3-points-and-a-plot-circle + p1, p2, p3 = start, mid, end + + temp = p2[0] * p2[0] + p2[1] * p2[1] + bc = (p1[0] * p1[0] + p1[1] * p1[1] - temp) / 2 + cd = (temp - p3[0] * p3[0] - p3[1] * p3[1]) / 2 + det = (p1[0] - p2[0]) * (p2[1] - p3[1]) - (p2[0] - p3[0]) * (p1[1] - p2[1]) + + if abs(det) < 1.0e-6: + raise ValueError() + + # Center of circle + cx = (bc*(p2[1] - p3[1]) - cd*(p1[1] - p2[1])) / det + cy = ((p1[0] - p2[0]) * cd - (p2[0] - p3[0]) * bc) / det + + radius = math.sqrt((cx - p1[0])**2 + (cy - p1[1])**2) + return ((cx, cy), radius) + + @sexp_type('hatch') class Hatch: style: AtomChoice(Atom.none, Atom.edge, Atom.full) = Atom.edge -- cgit