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repair gaps in the gyroid

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This commit is contained in:
Stewart Allen 2019-01-21 21:00:24 -05:00
commit 75405eb66b
3 changed files with 56 additions and 70 deletions
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70
js/geo-gyroid.js
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@ -60,7 +60,7 @@ var gs_base_gyroid = exports;
let lval = vals[vals.length-1][x];
for (let y=0; y<rez; y++) {
let val = vals[y][x];
if (lval <= 0 && val >= 0) {
if ((lval <= 0 && val >= 0) || (lval >= 0 && val <= 0)) {
if (edge[y][x]) {
edge[y][x] = 3;
} else {
@ -119,7 +119,7 @@ var gs_base_gyroid = exports;
for (let i=0; i<sparse.length; i++) {
let test_el = sparse[i];
if (test_el) {
let dst = dist(target, test_el, dir);
let dst = distTo(target, test_el, dir);
if (cl_idx === null || dst < cl_dst) {
cl_idx = i;
cl_elm = test_el;
@ -139,73 +139,49 @@ var gs_base_gyroid = exports;
} while (added);
} while (cleared < sparse.length);
return {edge, points, dir, polys: polys.map(poly => filter(poly,inc))};
let psimple = polys
.map(poly => filter(poly, 0))
.map(poly => filter(poly, inc));
return {edge, points, dir, polys: psimple};
}
// merge x/y co-linear
function filter(poly,inc) {
if (poly.length === 1) {
// merge co-linear and distance threshold
function filter(poly, inc) {
if (poly.length <= 2) {
return poly;
}
let nuchain = [];
let e1 = poly[0];
let nupoly = [ poly[0] ];
let e1 = poly[1];
let e2 = null;
let last = poly.length - 1;
let last = poly.length - 2;
for (let i=1; i<poly.length; i++) {
let el = poly[i];
if (e1.x === el.x || e1.y === el.y) {
let drop = inc ?
(distTo(e1, el) <= inc) :
(e1.x === el.x || e1.y === el.y);
if (drop) {
e2 = el;
if (i < last) {
continue;
}
}
if (e2) {
nuchain.push({x:(e1.x + e2.x)/2, y:(e1.y + e2.y)/2});
nupoly.push({x:(e1.x + e2.x)/2, y:(e1.y + e2.y)/2});
e2 = null;
} else {
nuchain.push(e1);
nupoly.push(e1);
if (i === last) {
nuchain.push(el);
nupoly.push(el);
}
}
e1 = el;
}
return filter2(nuchain,inc);
nupoly.push(poly[poly.length-1]);
return nupoly;
}
// merge points within radius
function filter2(poly,inc) {
if (poly.length === 1) {
return poly;
}
let nuchain = [];
let e1 = poly[0];
let e2 = null;
let last = poly.length - 1;
let merge = inc;
for (let i=1; i<poly.length; i++) {
let el = poly[i];
if (dist(e1, el) <= merge) {
e2 = el;
if (i < last) {
continue;
}
}
if (e2) {
nuchain.push({x:(e1.x + e2.x)/2, y:(e1.y + e2.y)/2});
e2 = null;
} else {
nuchain.push(e1);
if (i === last) {
nuchain.push(el);
}
}
e1 = el;
}
return nuchain;
}
function dist(a, b, dir) {
function distTo(a, b, dir) {
let dx = a.x - b.x;
let dy = a.y - b.y;
// bias distance by prevailing direction of discovery to join stragglers

2
js/license.js
View file

@ -1,7 +1,7 @@
var exports = {
COPYRIGHT:"Copyright (C) 2014-2019 Stewart Allen <sa@grid.space> - All Rights Reserved",
LICENSE:"See the license.md file included with the source distribution",
VERSION:"1.2.6b"
VERSION:"1.2.6c"
};
if (!module) var module = {};
module.exports = exports;