/**
* 对应于JS项目中的getParts
*/
public static List <NestPath> BuildTree(List <NestPath> parts, double curve_tolerance)
{
List <NestPath> polygons = new List <NestPath>();
for (int i = 0; i < parts.Count; i++)
{
NestPath cleanPoly = NestPath.cleanNestPath(parts[i]);
cleanPoly.bid = parts[i].bid;
if (cleanPoly.size() > 2 && Math.Abs(GeometryUtil.polygonArea(cleanPoly)) > curve_tolerance * curve_tolerance)
{
cleanPoly.setSource(i);
polygons.Add(cleanPoly);
}
}
CommonUtil.toTree(polygons, 0);
return(polygons);
}
/**
* 根据板件列表与旋转角列表，通过nfp,计算板件在底板上的位置，并返回这个种群的fitness
* @param paths
* @return
*/
public Result placePaths(List <NestPath> paths)
{
List <NestPath> rotated = new List <NestPath>();
for (int i = 0; i < paths.Count; i++)
{
NestPath r = GeometryUtil.rotatePolygon2Polygon(paths[i], paths[i].getRotation());
r.setRotation(paths[i].getRotation());
r.setSource(paths[i].getSource());
r.setId(paths[i].getId());
rotated.Add(r);
}
paths = rotated;
List <List <Vector> > allplacements = new List <List <Vector> >();
double fitness = 0;
double binarea = Math.Abs(GeometryUtil.polygonArea(this.binPolygon));
String key = null;
List <NestPath> nfp = null;
while (paths.Count > 0)
{
List <NestPath> placed = new List <NestPath>();
List <Vector> placements = new List <Vector>();
fitness += 1;
double minwidth = Double.MaxValue;
for (int i = 0; i < paths.Count; i++)
{
NestPath path = paths[i];
//inner NFP
key = new JavaScriptSerializer().Serialize(new NfpKey(-1, path.getId(), true, 0, path.getRotation()));
//key = gson.toJson(new NfpKey(-1, path.getId(), true, 0, path.getRotation()));
if (!nfpCache.ContainsKey(key))
{
continue;
}
List <NestPath> binNfp = nfpCache[key];
// ensure exists
bool error = false;
for (int j = 0; j < placed.Count; j++)
{
key = new JavaScriptSerializer().Serialize(new NfpKey(placed[j].getId(), path.getId(), false, placed[j].getRotation(), path.getRotation()));
// key = gson.toJson(new NfpKey(placed[j].getId(), path.getId(), false, placed[j].getRotation(), path.getRotation()));
if (nfpCache.ContainsKey(key))
{
nfp = nfpCache[key];
}
else
{
error = true;
break;
}
}
if (error)
{
continue;
}
Vector position = null;
if (placed.Count == 0)
{
// first placement , put it on the lefth
for (int j = 0; j < binNfp.Count; j++)
{
for (int k = 0; k < binNfp[j].size(); k++)
{
if (position == null || binNfp[j].get(k).x - path.get(0).x < position.x)
{
position = new Vector(
binNfp[j].get(k).x - path.get(0).x,
binNfp[j].get(k).y - path.get(0).y,
path.getId(),
path.getRotation()
);
}
}
}
placements.Add(position);
placed.Add(path);
continue;
}
Paths clipperBinNfp = new Paths();
for (int j = 0; j < binNfp.Count; j++)
{
NestPath binNfpj = binNfp[j];
clipperBinNfp.Add(scaleUp2ClipperCoordinates(binNfpj));
}
Clipper clipper = new Clipper();
Paths combinedNfp = new Paths();
for (int j = 0; j < placed.Count; j++)
{
key = new JavaScriptSerializer().Serialize(new NfpKey(placed[j].getId(), path.getId(), false, placed[j].getRotation(), path.getRotation()));
//key = gson.toJson(new NfpKey(placed[j].getId(), path.getId(), false, placed[j].getRotation(), path.getRotation()));
nfp = nfpCache[key];
if (nfp == null)
{
continue;
}
for (int k = 0; k < nfp.Count; k++)
{
Path clone = PlacementWorker.scaleUp2ClipperCoordinates(nfp[k]);
for (int m = 0; m < clone.Count; m++)
{
long clx = (long)clone[m].X;
long cly = (long)clone[m].Y;
IntPoint intPoint = clone[m];
intPoint.X = (clx + (long)(placements[j].x * Config.CLIIPER_SCALE));
intPoint.Y = (cly + (long)(placements[j].y * Config.CLIIPER_SCALE));
clone[m] = intPoint;
}
//clone = clone.Cleaned(0.0001 * Config.CLIIPER_SCALE);
clone = Clipper.CleanPolygon(clone, 0.0001 * Config.CLIIPER_SCALE);
double areaPoly = Math.Abs(Clipper.Area(clone));
if (clone.Count > 2 && areaPoly > 0.1 * Config.CLIIPER_SCALE * Config.CLIIPER_SCALE)
{
clipper.AddPath(clone, PolyType.ptSubject, true);
}
}
}
if (!clipper.Execute(ClipType.ctUnion, combinedNfp, PolyFillType.pftNonZero, PolyFillType.pftNonZero))
{
continue;
}
//difference with bin polygon
Paths finalNfp = new Paths();
clipper = new Clipper();
clipper.AddPaths(combinedNfp, PolyType.ptClip, true);
clipper.AddPaths(clipperBinNfp, PolyType.ptSubject, true);
if (!clipper.Execute(ClipType.ctDifference, finalNfp, PolyFillType.pftNonZero, PolyFillType.pftNonZero))
{
continue;
}
// finalNfp = finalNfp.Cleaned(0.0001 * Config.CLIIPER_SCALE);
finalNfp = Clipper.CleanPolygons(finalNfp, 0.0001 * Config.CLIIPER_SCALE);
for (int j = 0; j < finalNfp.Count(); j++)
{
//double areaPoly = Math.Abs(finalNfp[j].Area);
double areaPoly = Math.Abs(Clipper.Area(finalNfp[j]));
if (finalNfp[j].Count < 3 || areaPoly < 0.1 * Config.CLIIPER_SCALE * Config.CLIIPER_SCALE)
{
finalNfp.RemoveAt(j);
j--;
}
}
if (finalNfp == null || finalNfp.Count == 0)
{
continue;
}
List <NestPath> f = new List <NestPath>();
for (int j = 0; j < finalNfp.Count; j++)
{
f.Add(toNestCoordinates(finalNfp[j]));
}
List <NestPath> finalNfpf = f;
double minarea = Double.MinValue;
double minX = Double.MaxValue;
NestPath nf = null;
double area = Double.MinValue;
Vector shifvector = null;
for (int j = 0; j < finalNfpf.Count; j++)
{
nf = finalNfpf[j];
if (Math.Abs(GeometryUtil.polygonArea(nf)) < 2)
{
continue;
}
for (int k = 0; k < nf.size(); k++)
{
NestPath allpoints = new NestPath();
for (int m = 0; m < placed.Count; m++)
{
for (int n = 0; n < placed[m].size(); n++)
{
allpoints.add(new Segment(placed[m].get(n).x + placements[m].x,
placed[m].get(n).y + placements[m].y));
}
}
shifvector = new Vector(nf.get(k).x - path.get(0).x, nf.get(k).y - path.get(0).y, path.getId(), path.getRotation(), combinedNfp);
for (int m = 0; m < path.size(); m++)
{
allpoints.add(new Segment(path.get(m).x + shifvector.x, path.get(m).y + shifvector.y));
}
Bound rectBounds = GeometryUtil.getPolygonBounds(allpoints);
area = rectBounds.getWidth() * 2 + rectBounds.getHeight();
if (minarea == Double.MinValue ||
area < minarea ||
(GeometryUtil.almostEqual(minarea, area) &&
(minX == Double.MinValue || shifvector.x < minX)))
{
minarea = area;
minwidth = rectBounds.getWidth();
position = shifvector;
minX = shifvector.x;
}
}
}
if (position != null)
{
placed.Add(path);
placements.Add(position);
}
}
if (minwidth != Double.MinValue)
{
fitness += minwidth / binarea;
}
for (int i = 0; i < placed.Count; i++)
{
int index = paths.IndexOf(placed[i]);
if (index >= 0)
{
paths.RemoveAt(index);
}
}
if (placements != null && placements.Count > 0)
{
allplacements.Add(placements);
}
else
{
break; // something went wrong
}
}
// there were paths that couldn't be placed
fitness += 2 * paths.Count;
return(new Result(allplacements, fitness, paths, binarea));
}
/**
* 开始进行Nest计算
* @return
*/
public List <List <Placement> > startNest()
{
List <NestPath> tree = CommonUtil.BuildTree(parts, Config.CURVE_TOLERANCE);
CommonUtil.offsetTree(tree, 0.5 * config.SPACING);
binPath.config = config;
foreach (NestPath nestPath in parts)
{
nestPath.config = config;
}
NestPath binPolygon = NestPath.cleanNestPath(binPath);
Bound binBound = GeometryUtil.getPolygonBounds(binPolygon);
if (config.SPACING > 0)
{
List <NestPath> offsetBin = CommonUtil.polygonOffset(binPolygon, -0.5 * config.SPACING);
if (offsetBin.Count == 1)
{
binPolygon = offsetBin[0];
}
}
binPolygon.setId(-1);
List <int> integers = checkIfCanBePlaced(binPolygon, tree);
List <NestPath> safeTree = new List <NestPath>();
foreach (int i in integers)
{
safeTree.Add(tree[i]);
}
tree = safeTree;
double xbinmax = binPolygon.get(0).x;
double xbinmin = binPolygon.get(0).x;
double ybinmax = binPolygon.get(0).y;
double ybinmin = binPolygon.get(0).y;
for (int i = 1; i < binPolygon.size(); i++)
{
if (binPolygon.get(i).x > xbinmax)
{
xbinmax = binPolygon.get(i).x;
}
else if (binPolygon.get(i).x < xbinmin)
{
xbinmin = binPolygon.get(i).x;
}
if (binPolygon.get(i).y > ybinmax)
{
ybinmax = binPolygon.get(i).y;
}
else if (binPolygon.get(i).y < ybinmin)
{
ybinmin = binPolygon.get(i).y;
}
}
for (int i = 0; i < binPolygon.size(); i++)
{
binPolygon.get(i).x -= xbinmin;
binPolygon.get(i).y -= ybinmin;
}
double binPolygonWidth = xbinmax - xbinmin;
double binPolygonHeight = ybinmax - ybinmin;
if (GeometryUtil.polygonArea(binPolygon) > 0)
{
binPolygon.reverse();
}
/**
* 确保为逆时针
*/
for (int i = 0; i < tree.Count; i++)
{
Segment start = tree[i].get(0);
Segment end = tree[i].get(tree[i].size() - 1);
if (start == end || GeometryUtil.almostEqual(start.x, end.x) && GeometryUtil.almostEqual(start.y, end.y))
{
tree[i].pop();
}
if (GeometryUtil.polygonArea(tree[i]) > 0)
{
tree[i].reverse();
}
}
launchcount = 0;
Result best = null;
// Tree Modification based on nest4J
//List<NestPath> modifiedTree = new List<NestPath>();
//for (int i = 0; i < tree.Count; i++)
//{
// List<Segment> modifiedSegment = new List<Segment>();
// NestPath currentTree = tree[i];
// List<Segment> currentTreeSegments = currentTree.getSegments();
// modifiedSegment.Add(currentTreeSegments[currentTreeSegments.Count-1]);
// for (int j = 0; j < currentTreeSegments.Count-1; j++)
// {
// modifiedSegment.Add(currentTreeSegments[j]);
// }
// currentTree.setSegments(modifiedSegment);
// modifiedTree.Add(currentTree);
//}
//tree = modifiedTree;
for (int i = 0; i < loopCount; i++)
{
Result result = launchWorkers(tree, binPolygon, config);
if (i == 0)
{
best = result;
}
else
{
if (best.fitness > result.fitness)
{
best = result;
}
}
}
double sumarea = 0;
double totalarea = 0;
for (int i = 0; i < best.placements.Count; i++)
{
totalarea += Math.Abs(GeometryUtil.polygonArea(binPolygon));
for (int j = 0; j < best.placements[i].Count; j++)
{
try
{
sumarea += Math.Abs(GeometryUtil.polygonArea(tree[best.placements[i][j].id]));
}
catch (Exception ex)
{
}
}
}
double rate = (sumarea / totalarea) * 100;
List <List <Placement> > appliedPlacement = applyPlacement(best, tree);
return(appliedPlacement);
}