# shape_superformula

## 參數

• `phi_step` : Superformula 的角度步進。
• `m1`, `m2`, `n1`, `n2`, `n3`, `a`, `b` : Superformula 的各參數，`n2``n3``a``b` 的預設值為 1。

## 範例

``````include <shape_superformula.scad>;

phi_step = 0.05;

polygon(shape_superformula(phi_step, 3, 3, 4.5, 10, 10));
translate([3, 0])
polygon(shape_superformula(phi_step, 4, 4, 12, 15, 15));
translate([6, 0])
polygon(shape_superformula(phi_step, 7, 7, 10, 6, 6));
translate([9, 0])
polygon(shape_superformula(phi_step, 5, 5, 4, 4, 4));

translate([0, -4])
scale(0.8) polygon(shape_superformula(phi_step, 5, 5, 2, 7, 7));
translate([3, -4])
scale(0.25) polygon(shape_superformula(phi_step, 5, 5, 2, 13, 13));
translate([6, -4])
polygon(shape_superformula(phi_step, 4, 4, 1, 1, 1));
translate([9, -4])
scale(0.3) polygon(shape_superformula(phi_step, 4, 4, 1, 7, 8));
``````

``````include <shape_superformula.scad>;

phi_step = 0.05;

m = 16;
n = 0.5;
n3 = 16;

shape_pts = shape_superformula(phi_step, m, m, n, n, n3);

golden_spiral_extrude(
shape_pts,
from = 5,
to = 10,
point_distance = 2,
scale = 10
);
``````