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61 lines
2.0 KiB
Markdown
61 lines
2.0 KiB
Markdown
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# shape_superformula
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Returns shape points and triangle indexes of a [Superformula](https://en.wikipedia.org/wiki/Superformula) shape. They can be used with xxx_extrude modules of dotSCAD. The shape points can be also used with the built-in polygon module.
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## Parameters
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- `phi_step` : The radius of the circle.
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- `m1`, `m2`, `n1`, `n2`, `n3`, `a`, `b` : The parameters of [Superformula](https://en.wikipedia.org/wiki/Superformula). The default value of `n2`, `n3`, `a`, and `b` is 1.
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## Examples
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include <shape_superformula.scad>;
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phi_step = 0.05;
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polygon(shape_superformula(phi_step, 3, 3, 4.5, 10, 10)[0]);
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translate([3, 0])
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polygon(shape_superformula(phi_step, 4, 4, 12, 15, 15)[0]);
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translate([6, 0])
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polygon(shape_superformula(phi_step, 7, 7, 10, 6, 6)[0]);
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translate([9, 0])
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polygon(shape_superformula(phi_step, 5, 5, 4, 4, 4)[0]);
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translate([0, -4])
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scale(0.8) polygon(shape_superformula(phi_step, 5, 5, 2, 7, 7)[0]);
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translate([3, -4])
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scale(0.25) polygon(shape_superformula(phi_step, 5, 5, 2, 13, 13)[0]);
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translate([6, -4])
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polygon(shape_superformula(phi_step, 4, 4, 1, 1, 1)[0]);
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translate([9, -4])
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scale(0.3) polygon(shape_superformula(phi_step, 4, 4, 1, 7, 8)[0]);
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include <shape_superformula.scad>;
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include <circle_path.scad>;
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include <rotate_p.scad>;
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include <golden_spiral.scad>;
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include <cross_sections.scad>;
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include <polysections.scad>;
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include <golden_spiral_extrude.scad>;
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phi_step = 0.05;
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m = 16;
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n = 0.5;
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n3 = 16;
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shape_pts_tris = shape_superformula(phi_step, m, m, n, n, n3);
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golden_spiral_extrude(
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shape_pts_tris[0],
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from = 5,
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to = 10,
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point_distance = 2,
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scale = 10,
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triangles = shape_pts_tris[1]
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);
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