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refactor: use cross

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Justin Lin
2022-04-11 11:31:14 +08:00
parent 71f2156d3e
commit ad760d1f4a
1 changed files with 1 additions and 6 deletions
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7
src/experimental/tri_is_ccw.scad
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@@ -1,9 +1,4 @@
function tri_is_ccw(shape_pts) = function tri_is_ccw(shape_pts) =
let( let(area = cross(shape_pts[1] - shape_pts[0], shape_pts[2] - shape_pts[0]))
p1 = shape_pts[0],
p2 = shape_pts[1],
p3 = shape_pts[2],
area = (p2[0] - p1[0]) * (p3[1] - p1[1]) - (p3[0] - p1[0]) * (p2[1] - p1[1])
)
assert(area != 0, "points are collinear") assert(area != 0, "points are collinear")
area > 0; area > 0;