1 files changed, 3 insertions, 24 deletions
diff --git a/gerbonara/cad/kicad/symbols.py b/gerbonara/cad/kicad/symbols.py
index baa77bb..ed93f7b 100644
--- a/gerbonara/cad/kicad/symbols.py
+++ b/gerbonara/cad/kicad/symbols.py
@@ -20,6 +20,7 @@ from .base_types import *
 from ...utils import rotate_point, Tag, arc_bounds
 from ...newstroke import Newstroke
 from .schematic_colors import *
+from .primitives import center_arc_to_kicad_mid
 
 
 PIN_ETYPE = AtomChoice(Atom.input, Atom.output, Atom.bidirectional, Atom.tri_state, Atom.passive, Atom.free,
@@ -249,28 +250,6 @@ class Circle:
                   **self.stroke.svg_attrs(colorscheme.lines))
 
 
-# https://stackoverflow.com/questions/28910718/give-3-points-and-a-plot-circle
-def define_circle(p1, p2, p3):
-    """
-    Returns the center and radius of the circle passing the given 3 points.
-    In case the 3 points form a line, raises a ValueError.
-    """
-    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('arc')
 class Arc:
     start: Rename(XYCoord) = field(default_factory=XYCoord)
@@ -280,7 +259,7 @@ class Arc:
     fill: Fill = field(default_factory=Fill)
 
     def bounding_box(self, default=None):
-        (cx, cy), r = define_circle((self.start.x, self.start.y), (self.mid.x, self.mid.y), (self.end.x, self.end.y))
+        (cx, cy), r = center_arc_to_kicad_mid(self.mid, self.start, self.end)
         x1, y1 = self.start.x, self.start.y
         x2, y2 = self.mid.x-x1, self.mid.y-x2
         x3, y3 = (self.end.x - x1)/2, (self.end.y - y1)/2
@@ -289,7 +268,7 @@ class Arc:
 
 
     def to_svg(self, colorscheme=Colorscheme.KiCad):
-        (cx, cy), r = define_circle((self.start.x, self.start.y), (self.mid.x, self.mid.y), (self.end.x, self.end.y))
+        (cx, cy), r = center_arc_to_kicad_mid(self.mid, self.start, self.end)
 
         x1r = self.start.x - cx
         y1r = self.start.y - cy