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add precursor thin wall detection

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This commit is contained in:
Stewart Allen 2018-01-09 19:07:37 -05:00
commit 28097e84f1
2 changed files with 55 additions and 14 deletions
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51
js/geo-polygons.js
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@ -386,6 +386,14 @@ var gs_base_polygons = exports;
return out;
}
function sumCirc(polys) {
var sum = 0.0;
polys.forEach(function(poly) {
sum += poly.circularityDeep();
});
return sum;
}
/**
* @param {Polygon[]} polys
* @param {number} distance offset
@ -410,7 +418,8 @@ var gs_base_polygons = exports;
cjnt = clib.JoinType,
cety = clib.EndType,
coff = new clib.ClipperOffset(),
ctre = new clib.PolyTree();
ctre = new clib.PolyTree(),
circ = sumCirc(polys);
polys.forEach(function(poly) {
var clean = clip.CleanPolygons(poly.toClipper(), CONF.clipperClean);
@ -439,13 +448,14 @@ var gs_base_polygons = exports;
* @param {number} dist1 first offset distance
* @param {number} dist2 2nd thru last offset distance
* @param {number} over additional offset over then under
* @param {Polygon[]} [out] optional collector
* @param {number} [count] offset passes (0 == until no space left)
* @param {Function} [collector] receives output of each pass
* @param {Polygon[]} out optional collector
* @param {number} count offset passes (0 == until no space left)
* @param {Function} collector receives output of each pass
* @param {Function} thins receives output of each pass
* @param {number} [z] defaults to 0
* @returns {Polygon[]} last offset
*/
function expand2(polys, dist1, dist2, over, out, count, collector, z) {
function expand2(polys, dist1, dist2, over, out, count, collector, thins, z) {
// prepare alignments for clipper lib
alignWindings(polys);
polys.forEach(function(poly) {
@ -459,7 +469,8 @@ var gs_base_polygons = exports;
cjnt = clib.JoinType,
cety = clib.EndType,
coff = new clib.ClipperOffset(),
ctre = new clib.PolyTree();
ctre = new clib.PolyTree(),
orig = polys;
// inset
polys.forEach(function(poly) {
@ -481,11 +492,22 @@ var gs_base_polygons = exports;
coff.Execute(ctre, (-over) * fact);
polys = fromClipperTree(ctre, z);
// detect possible thin walls
if (polys.length && thins) {
var circ1 = sumCirc(orig),
circ2 = sumCirc(polys),
diff = Math.abs(1 - (circ1 / circ2));
if (diff > 0.2) {
thins(orig, polys, diff);
}
}
// process
if (out) out.appendAll(polys);
if (collector) collector(polys, count);
if ((count === 0 || count > 1) && polys.length > 0) {
expand2(polys, dist2 || dist1, dist2, over, out, count > 0 ? count-1 : 0, collector, z);
expand2(polys, dist2 || dist1, dist2, over, out, count > 0 ? count-1 : 0, collector, thins, z);
}
return polys;
@ -551,10 +573,11 @@ var gs_base_polygons = exports;
* @param {number} angle (-90 to 90)
* @param {number} spacing
* @param {Polygon[]} [output]
* @param {numer} minLen
* @param {number} [minLen]
* @param {number} [maxLen]
* @returns {Point[]} supplied output or new array
*/
function fillArea(polys, angle, spacing, output, minLen) {
function fillArea(polys, angle, spacing, output, minLen, maxLen) {
var i = 1,
p0 = polys[0],
zpos = p0.getZ(),
@ -590,7 +613,8 @@ var gs_base_polygons = exports;
cfil = clib.PolyFillType,
clip = new clib.Clipper(),
ctre = new clib.PolyTree(),
minlen = BASE.config.clipper * (minLen || 0.25),
minlen = BASE.config.clipper * (minLen || 0),
maxlen = BASE.config.clipper * (maxLen || 0),
lines = [];
for (i = 0; i < steps; i++) {
@ -608,8 +632,11 @@ var gs_base_polygons = exports;
if (clip.Execute(ctyp.ctIntersection, ctre, cfil.pftNonZero, cfil.pftEvenOdd)) {
ctre.m_AllPolys.forEach(function(poly) {
// filter out polygons under min length (0.5mm)
// if (clib.JS.PerimeterOfPath(poly.m_polygon, false, 1) < minlen) return;
if (minlen || maxlen) {
var plen = clib.JS.PerimeterOfPath(poly.m_polygon, false, 1);
if (minlen && plen < minlen) return;
if (maxlen && plen > maxlen) return;
}
poly.m_polygon.forEach(function(point) {
rayint.push(newPoint(null,null,zpos,null,point));
});