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function bezier(points, t) =
len(points) == 1 ? points[0] :
bezier([for (i = [0:len(points)-2])
(1 - t) * points[i] + t * points[i + 1]], t);
function bezier_curve(points, steps) =
[for (i = [0:steps]) bezier(points, i / steps)];
points = [[0, 0], [10, 0], [1, 5], [0, 10]];
steps = 100;
curve = bezier_curve(points, steps);
polygon(curve);
// alt
points2 = [[0, 0, 0], [10, 0, 5], [1, 5, 10], [0, 10, 15]];
// steps = 100;
curve2 = bezier_curve(points2, steps);
polyhedron(points=curve2, faces=[[for (i=[0:len(curve2)-2]) [i, i+1]]]);
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