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return pow 2 of radius

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Justin Lin
2021-04-02 16:08:51 +08:00
parent a9e1add8bb
commit ea8a5d87ed
1 changed files with 6 additions and 3 deletions
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9
src/experimental/tri_circumcircle.scad
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@@ -9,10 +9,13 @@ function tri_circumcircle(points) =
d1 = (p2 + p1) / 2 * v1, d1 = (p2 + p1) / 2 * v1,
det = -cross(v0 , v1) det = -cross(v0 , v1)
) )
det == 0? [] : det == 0 ? undef :
let( let(
x = (d1 * v0[1] - d0 * v1[1]) / det, x = (d1 * v0[1] - d0 * v1[1]) / det,
y = (d0 * v1[0] - d1 * v0[0]) / det, y = (d0 * v1[0] - d1 * v0[0]) / det,
r = norm(p0 - [x,y]) center = [x, y],
v = p0 - center,
r = norm(v),
rr = pow(v[0], 2) + pow(v[1], 2)
) )
[[x,y], r]; [center, r, rr];