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dotSCAD/docs/lib-bezier_curve.md
2017-04-26 17:24:47 +08:00

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# bezier_curve
Given a set of control points, the `bezier_curve` function returns points of the Bézier path. Combined with the `polyline`, `polyline3d` or `hull_polyline3d` module defined in my library, you can create a Bézier curve.
## Parameters
- `t_step` : The distance between two points of the Bézier path.
- `points` : A set of `[x, y, z]` control points.
## Examples
If you have four control points and combine with the `hull_polyline3d` module:
include <hull_polyline3d.scad>;
include <bezier_curve.scad>;
t_step = 0.05;
width = 2;
p0 = [0, 0, 0];
p1 = [40, 60, 35];
p2 = [-50, 90, 0];
p3 = [0, 200, -35];
points = bezier_curve(t_step,
[p0, p1, p2, p3]
);
hull_polyline3d(points, width);
![bezier_curve](images/lib-bezier_curve-1.JPG)