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refactor and add smooth params

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Justin Lin
2022-05-27 09:10:35 +08:00
parent bce7487a96
commit 1fb449fdf6
2 changed files with 29 additions and 18 deletions
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25
examples/differential_line_growth.scad
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@@ -1,18 +1,25 @@
use <shape_circle.scad>; use <shape_circle.scad>;
use <experimental/differential_line_growth.scad>; use <experimental/differential_line_growth.scad>;
use <midpt_smooth.scad>;
$fn = 24; $fn = 24;
r = 20; r = 10;
times = 50; times = 80;
thickness = 2; thickness = 2;
smooth = true;
smooth_times = 2;
node_option = [ node_option = [
0.5, // maxForce 0.4, // maxForce
0.7, // maxSpeed 0.5, // maxSpeed
12, // separationDistance 5, // separationDistance
1.5, // separationCohesionRatio 1.2, // separationCohesionRatio
10 // maxEdgeLength 4 // maxEdgeLength
]; ];
init_shape = shape_circle(r); init_shape = shape_circle(r);
poly = differential_line_growth(init_shape, node_option, times);
linear_extrude(thickness) linear_extrude(thickness)
polygon(differential_line_growth(init_shape, node_option, times)); polygon(
smooth ? midpt_smooth(poly, smooth_times, true) : poly
);

22
src/experimental/_impl/_differential_line_growth.scad
View File

@@ -89,18 +89,22 @@ function updateAllSeperation(allSeperation, allSeperationFrom_i_1, leng, n) = [
function differentiate(nodes, leng) = function differentiate(nodes, leng) =
[ [
for(i = 0, for(i = 0,
allSep = [for(i = [0:leng - 1]) ZERO_VT], j = 1,
allSeperationFrom_i_1 = allSeperationFrom(nodes, leng, nodes[i], i + 1); allSeperationFrom_i_1 = allSeperationFrom(nodes, leng, nodes[i], j),
i < leng; allSep = [ZERO_VT, each -allSeperationFrom_i_1],
allSep = updateAllSeperation(allSep, allSeperationFrom_i_1, leng, i + 1), running = i < leng;
running;
i = i + 1, i = i + 1,
allSeperationFrom_i_1 = i < leng ? allSeperationFrom(nodes, leng, nodes[i], i + 1) : undef j = j + 1,
running = i < leng,
allSeperationFrom_i_1 = running ? allSeperationFrom(nodes, leng, nodes[i], j) : undef,
allSep = running ? updateAllSeperation(allSep, allSeperationFrom_i_1, leng, j) : undef
) )
let( applyForceTo(
seperation_i = sum([allSep[i], each allSeperationFrom_i_1]), nodes[i],
cohesion_i = cohesion(nodes, leng, i) sum([allSep[i], each allSeperationFrom_i_1]),
cohesion(nodes, leng, i)
) )
applyForceTo(nodes[i], seperation_i, cohesion_i)
]; ];
function _differential_line_growth(nodes) = function _differential_line_growth(nodes) =