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69 lines
1.5 KiB
Markdown
69 lines
1.5 KiB
Markdown
# ptf_rotate
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Rotates a point `a` degrees around the axis of the coordinate system or an arbitrary axis. It behaves as the built-in `rotate` module
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**Since:** 2.3
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## Parameters
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- `point` : A 3D point `[x, y, z]` or a 2D point `[x, y]`.
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- `a` : If it's `[deg_x, deg_y, deg_z]`, the rotation is applied in the order `x`, `y`, `z`. If it's `[deg_x, deg_y]`, the rotation is applied in the order `x`, `y`. If it's`[deg_x]`, the rotation is only applied to the `x` axis. If it's an number, the rotation is only applied to the `z` axis or an arbitrary axis.
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- `v`: A vector allows you to set an arbitrary axis about which the object will be rotated. When `a` is an array, the `v` argument is ignored.
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**Since:** 2.3.
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## Examples
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use <ptf/ptf_rotate.scad>
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point = [20, 0, 0];
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a = [0, -45, 45];
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hull() {
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sphere(1);
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translate(ptf_rotate(point, a))
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rotate(a)
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sphere(1);
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}
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use <ptf/ptf_rotate.scad>
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radius = 40;
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step_angle = 10;
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z_circles = 20;
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points = [for(a = [0:step_angle:90 * z_circles])
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ptf_rotate(
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[radius, 0, 0],
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[0, -90 + 2 * a / z_circles, a]
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)
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];
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for(p = points) {
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translate(p)
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sphere(1);
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}
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%sphere(radius);
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use <ptf/ptf_rotate.scad>
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v = [10, 10, 10];
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hull() {
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sphere(1);
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translate(v)
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sphere(1);
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}
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p = [10, 10, 0];
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for(i = [0:20:340]) {
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translate(ptf_rotate(p, a = i, v = v))
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sphere(1);
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}
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