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add start_n param

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Justin Lin
2022-06-05 20:56:32 +08:00
parent 0fc6e05d8f
commit 9333145a6d
1 changed files with 14 additions and 12 deletions
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26
examples/spiral/golden_spiral_jigsaw.scad
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@@ -1,12 +1,12 @@
use <polyline_join.scad>; use <polyline_join.scad>;
use <util/radians.scad>; use <util/radians.scad>;
use <util/lerp.scad>;
use <ptf/ptf_rotate.scad>; use <ptf/ptf_rotate.scad>;
use <util/lerp.scad>;
spirals = 8; spirals = 8;
start_n = 1; // spiral start from 360 / spirals * start_n
degrees = 150; degrees = 150;
thickness = 3; thickness = 2.5;
offset_r = 0.4; offset_r = 0.4;
$fn = 24; $fn = 24;
@@ -14,9 +14,11 @@ golden_spiral_jigsaw();
module golden_spiral_jigsaw() { module golden_spiral_jigsaw() {
offset_rr = offset_r / 40; offset_rr = offset_r / 40;
start = 360 / spirals; a_step = 360 / spirals;
start = 360 / spirals * start_n;
phi = (1 + sqrt(5)) / 2; phi = (1 + sqrt(5)) / 2;
function piece_polygons(start, step, to) = function piece_polygons(start, step, to) =
let( let(
points = [ points = [
@@ -66,7 +68,7 @@ module golden_spiral_jigsaw() {
linear_extrude(thickness) linear_extrude(thickness)
scale(40) scale(40)
{ {
a_step = 360 / spirals;
polygons = piece_polygons(start, a_step, degrees * 2); polygons = piece_polygons(start, a_step, degrees * 2);
for(i = [0:spirals - 1]) { for(i = [0:spirals - 1]) {
@@ -95,7 +97,7 @@ module golden_spiral_jigsaw() {
} }
// plate // plate
polygons2 = piece_polygons(-a_step, a_step, start * 3); polygons2 = piece_polygons(-a_step, a_step, start + a_step * 4);
points = [ points = [
for(d = [-start:a_step / 4:start]) for(d = [-start:a_step / 4:start])
let( let(
@@ -111,10 +113,10 @@ module golden_spiral_jigsaw() {
for(i = [0:spirals - 1]) { for(i = [0:spirals - 1]) {
rotate(a_step * i) rotate(a_step * i)
difference() { difference() {
offset(-offset_rr / 2) offset(-offset_rr / 2)
union() union()
for(j = [0:len(polygons2) - 5]) { for(j = [0:len(polygons2) - 13]) {
poly = polygons2[j]; poly = polygons2[j];
polygon(poly); polygon(poly);
} }
@@ -132,11 +134,11 @@ module golden_spiral_jigsaw() {
]; ];
union() { union() {
if(j > 3) { if(j >= start_n * 4) {
interlocking_part2(r_poly, offset_rr); interlocking_part2(r_poly, offset_rr);
} }
if(j > 6) { if(j >= start_n * 4 + 3) {
interlocking_part1(u_poly, offset_rr); interlocking_part1(u_poly, offset_rr);
} }
} }