static void Main(string[] args)
{
NestPath bin = new NestPath();
double binWidth = 75;
double binHeight = 41;
bin.add(0, 0);
bin.add(binWidth, 0);
bin.add(binWidth, binHeight);
bin.add(0, binHeight);
Console.WriteLine("Bin Size : Width = " + binWidth + " Height=" + binHeight);
//将多边形转换为坐标形式
var nestPaths = SvgUtil.transferSvgIntoPolygons("test3.xml");
Console.WriteLine("Reading File = test1.xml");
Console.WriteLine("No of parts = " + nestPaths.Count);
Config config = new Config();
Console.WriteLine("Configuring Nest");
Nest nest = new Nest(bin, nestPaths, config, 2);
Console.WriteLine("Performing Nest");
List <List <Placement> > appliedPlacement = nest.startNest();
Console.WriteLine("Nesting Completed");
var svgPolygons = SvgUtil.svgGenerator(nestPaths, appliedPlacement, binWidth, binHeight);
Console.WriteLine("Converted to SVG format");
SvgUtil.saveSvgFile(svgPolygons, "output.svg");
Console.WriteLine("Saved svg file..Opening File");
Process.Start("output.svg");
Console.ReadLine();
}
public static List <NestPath> transferSvgIntoPolygons(string xmlFilePath)
{
List <NestPath> nestPaths = new List <NestPath>();
XDocument document = XDocument.Load(xmlFilePath);
List <XElement> elementList = document.Root.DescendantNodes().OfType <XElement>().ToList();
int count = 0;
foreach (XElement element in elementList)
{
count++;
if ("polygon" == (element.Name))
{
String datalist = element.Attributes((XName)"points").ToList()[0].Value.ToString();
NestPath polygon = new NestPath();
foreach (String s in datalist.Split(' '))
{
var temp = s.Trim();
if (temp.IndexOf(",") == -1)
{
continue;
}
String[] value = s.Split(',');
double x = Double.Parse(value[0]);
double y = Double.Parse(value[1]);
polygon.add(x, y);
}
polygon.bid = count;
polygon.setRotation(4);
nestPaths.Add(polygon);
}
else if ("rect" == element.Name)
{
double width = Double.Parse(element.Attributes((XName)"width").ToList()[0].Value.ToString());
double height = Double.Parse(element.Attributes((XName)"height").ToList()[0].Value.ToString());
double x = Double.Parse(element.Attributes((XName)"x").ToList()[0].Value.ToString());
double y = Double.Parse(element.Attributes((XName)"y").ToList()[0].Value.ToString());
NestPath rect = new NestPath();
rect.add(x, y);
rect.add(x + width, y);
rect.add(x + width, y + height);
rect.add(x, y + height);
rect.bid = count;
rect.setRotation(4);
nestPaths.Add(rect);
}
}
return(nestPaths);
}
public static NestPath toNestCoordinates(Path polygon)
{
NestPath clone = new NestPath();
for (int i = 0; i < polygon.Count; i++)
{
Segment s = new Segment((double)polygon[i].X / Config.CLIIPER_SCALE, (double)polygon[i].Y / Config.CLIIPER_SCALE);
clone.add(s);
}
return(clone);
}
public static NestPath clipperToNestPath(Path polygon)
{
NestPath normal = new NestPath();
for (int i = 0; i < polygon.Count; i++)
{
NestCoor nestCoor = toNestCoor(polygon[i].X, polygon[i].Y);
normal.add(new Segment(nestCoor.getX(), nestCoor.getY()));
}
return(normal);
}
public static NestPath Path2NestPath(Path path)
{
NestPath nestPath = new NestPath();
for (int i = 0; i < path.Count; i++)
{
IntPoint lp = path[i];
NestCoor coor = CommonUtil.toNestCoor(lp.X, lp.Y);
nestPath.add(new Segment(coor.getX(), coor.getY()));
}
return(nestPath);
}
public static List <NestPath> polygonOffset(NestPath polygon, double offset)
{
List <NestPath> result = new List <NestPath>();
if (offset == 0 || GeometryUtil.almostEqual(offset, 0))
{
/**
* return EmptyResult
*/
return(result);
}
Path p = new Path();
foreach (Segment s in polygon.getSegments())
{
ClipperCoor cc = toClipperCoor(s.getX(), s.getY());
p.Add(new IntPoint(cc.getX(), cc.getY()));
}
int miterLimit = 2;
ClipperOffset co = new ClipperOffset(miterLimit, Config.CURVE_TOLERANCE * Config.CLIIPER_SCALE);
co.AddPath(p, JoinType.jtRound, EndType.etClosedPolygon);
Paths newpaths = new Paths();
co.Execute(ref newpaths, offset * Config.CLIIPER_SCALE);
/**
* 这里的length是1的话就是我们想要的
*/
for (int i = 0; i < newpaths.Count; i++)
{
result.Add(CommonUtil.clipperToNestPath(newpaths[i]));
}
if (offset > 0)
{
NestPath from = result[0];
if (GeometryUtil.polygonArea(from) > 0)
{
from.reverse();
}
from.add(from.get(0)); from.getSegments().RemoveAt(0);
}
return(result);
}
/**
* 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));
}
public static List <NestPath> transferSvgIntoPolygons(string xmlFilePath)
{
List <NestPath> nestPaths = new List <NestPath>();
XDocument document = XDocument.Load(xmlFilePath);
List <XElement> elementList = document.Root.DescendantNodes().OfType <XElement>().ToList();
//对于测试库的数据，需要做一下筛选，如果是自己弄得测试数据，这句可以不要
var elements = elementList.Where(p => p.Name == "polygon");
int count = 0;
int index = 0;
foreach (XElement element in elements)
{
count++;
//对于测试库的数据要加上这一句
var elementFirstNode = (XElement)element.FirstNode;
var rotation = int.Parse(element.Attributes((XName)"nVertices").ToList()[0].Value.ToString());
switch (elementFirstNode.Name.ToString())
{
case "polyline":
case "polygon":
{
String datalist = element.Attributes((XName)"points").ToList()[0].Value.ToString();
NestPath polygon = new NestPath();
polygon.setElement(element.ToString());
foreach (String s in datalist.Split(' '))
{
var temp = s.Trim();
if (temp.IndexOf(",") == -1)
{
continue;
}
String[] value = s.Split(',');
double x = Double.Parse(value[0]);
double y = Double.Parse(value[1]);
polygon.add(x, y); //点的坐标
}
polygon.bid = count; //多边形的序号
polygon.setRotation(4); //旋转角度，值设为4时代表角度可以旋转90、180、270，该值一般为360的倍数
nestPaths.Add(polygon);
break;
}
case "lines":
{
index++;
var piesCount = int.Parse(elementFirstNode.Attributes((XName)"count").ToList()[0].Value.ToString());
var dataList = elementFirstNode.DescendantNodes().OfType <XElement>().ToList();
NestPath polygon = new NestPath();
string point = null;
foreach (var data in dataList)
{
if (data.Name == "segment")
{
//为了保证在排样前各个图形的坐标不重合，所以后面增加2000 * index
var x0 = Double.Parse(data.Attributes((XName)"x0").ToList()[0].Value.ToString()) + 20 * index;
var y0 = Double.Parse(data.Attributes((XName)"y0").ToList()[0].Value.ToString()) + 20 * index;
var x1 = Double.Parse(data.Attributes((XName)"x1").ToList()[0].Value.ToString()) + 20 * index;
var y1 = Double.Parse(data.Attributes((XName)"y1").ToList()[0].Value.ToString()) + 20 * index;
point += x0 + "," + y0 + " ";
polygon.add(x0, y0);
polygon.add(x1, y1);
}
}
var listTemp = polygon.getSegments();
var newList = new List <Segment>();
for (int i = 0; i < listTemp.Count; i++)
{
if (i % 2 == 0)
{
newList.Add(listTemp[i]);
}
}
polygon.setSegments(newList);
polygon.bid = count; //多边形的序号
polygon.setRotation(rotation); //旋转角度，值设为4时代表角度可以旋转90、180、270，该值一般为360的倍数
var elementTemp = " <polygon fill=\"none\" stroke=\"#010101\" stroke-miterlimit=\"10\" points= \"" + point + " \"></polygon>";
for (int i = 0; i < piesCount; i++)
{
polygon.setElement(elementTemp);
nestPaths.Add(polygon);
}
break;
}
case "rect":
{
double width = Double.Parse(element.Attributes((XName)"width").ToList()[0].Value.ToString());
double height = Double.Parse(element.Attributes((XName)"height").ToList()[0].Value.ToString());
double x = Double.Parse(element.Attributes((XName)"x").ToList()[0].Value.ToString());
double y = Double.Parse(element.Attributes((XName)"y").ToList()[0].Value.ToString());
NestPath rect = new NestPath();
rect.setElement(element.ToString());
rect.add(x, y);
rect.add(x + width, y);
rect.add(x + width, y + height);
rect.add(x, y + height);
rect.bid = count;
rect.setRotation(4);
nestPaths.Add(rect);
break;
}
case "circle": //对于圆形，给转换成坐标形式
{
double cx = Double.Parse(element.Attributes((XName)"cx").ToList()[0].Value.ToString());
double cy = Double.Parse(element.Attributes((XName)"cy").ToList()[0].Value.ToString());
double radius = Double.Parse(element.Attributes((XName)"r").ToList()[0].Value.ToString());
// num is the smallest number of segments required to approximate the circle to the given tolerance
var num = Math.Ceiling((2 * Math.PI) / Math.Acos(1 - (ToleranceConfig.tolerance / radius)));
if (num < 3)
{
num = 3;
}
NestPath circle = new NestPath();
circle.setElement(element.ToString());
circle.bid = count;
circle.setRotation(4);
for (var i = 0; i < num; i++)
{
var theta = i * ((2 * Math.PI) / num);
double x = radius * Math.Cos(theta) + cx;
double y = radius * Math.Sin(theta) + cy;
circle.add(x, y);
}
nestPaths.Add(circle);
break;
}
case "ellipse": //对于椭圆，给转换成坐标形式
{
// same as circle case. There is probably a way to reduce points but for convenience we will just flatten the equivalent circular polygon
var rx = Double.Parse(element.Attributes((XName)"rx").ToList()[0].Value.ToString());
var ry = Double.Parse(element.Attributes((XName)"ry").ToList()[0].Value.ToString());
var maxradius = Math.Max(rx, ry);
var cx = Double.Parse(element.Attributes((XName)"cx").ToList()[0].Value.ToString());
var cy = Double.Parse(element.Attributes((XName)"cy").ToList()[0].Value.ToString());
var num = Math.Ceiling((2 * Math.PI) / Math.Acos(1 - (ToleranceConfig.tolerance / maxradius)));
if (num < 3)
{
num = 3;
}
NestPath ellipse = new NestPath();
ellipse.setElement(element.ToString());
ellipse.bid = count;
ellipse.setRotation(4);
for (var i = 0; i < num; i++)
{
var theta = i * ((2 * Math.PI) / num);
double x = maxradius * Math.Cos(theta) + cx;
double y = maxradius * Math.Sin(theta) + cy;
ellipse.add(x, y);
}
nestPaths.Add(ellipse);
break;
}
case "path": //对于带弧形的多边形，给转换成坐标形式
{
var path = element.Attributes((XName)"d").ToList()[0].Value.ToString();
var pathNumbers = transferPathToNumber(path);
string pathNumberType = "MLHVCSQTA";
NestPath pathPloy = new NestPath();
pathPloy.setElement(element.ToString());
pathPloy.bid = count;
pathPloy.setRotation(4);
double x, y, x0, y0, x1, y1, x2, y2, prevx, prevy, prevx1, prevy1, prevx2, prevy2;
x = y = x0 = y0 = x1 = y1 = x2 = y2 = prevx = prevy = prevx1 = prevy1 = prevx2 = prevy2 = 0;
for (var i = 0; i < pathNumbers.Count; i++)
{
var s = pathNumbers[i].Numbers; ////对应C#中的pathNumber的Numbers
var command = pathNumbers[i].Type; //对应C#中的pathNumber的path type
prevx = x;
prevy = y;
prevx1 = x1;
prevy1 = y1;
prevx2 = x2;
prevy2 = y2;
if (pathNumberType.Contains(command))
{
switch (command)
{
case "M":
case "L":
case "T":
{
x = s[0];
y = s[1];
break;
}
case "H":
{
x = s[0];
break;
}
case "V":
{
y = s[0];
break;
}
case "Q":
{
x1 = s[0];
y1 = s[1];
x = s[2];
y = s[3];
break;
}
case "S":
{
x2 = s[0];
y2 = s[1];
x = s[2];
y = s[3];
break;
}
case "C":
{
x1 = s[0];
y1 = s[1];
x2 = s[2];
y2 = s[3];
x = s[4];
y = s[5];
break;
}
}
}
else
{
switch (command)
{
case "m":
case "l":
case "t":
{
x += s[0];
y += s[1];
break;
}
case "h":
{
x += s[0];
break;
}
case "v":
{
y += s[0];
break;
}
case "q":
{
x1 = x + s[0];
y1 = y + s[1];
x += s[2];
y += s[3];
break;
}
case "s":
{
x2 = x + s[0];
y2 = y + s[1];
x += s[2];
y += s[3];
break;
}
case "c":
{
x1 = x + s[0];
y1 = y + s[1];
x2 = x + s[2];
y2 = y + s[3];
x += s[4];
y += s[5];
break;
}
}
}
switch (command)
{
// linear line types
case "m":
case "M":
case "l":
case "L":
case "h":
case "H":
case "v":
case "V":
pathPloy.add(x, y);
break;
// Quadratic Beziers
case "t":
case "T":
{
// implicit control point
var tPathNumberType = "QqTt";
if (i > 0 && tPathNumberType.Contains(pathNumbers[i - 1].Type))
{
x1 = prevx + (prevx - prevx1);
y1 = prevy + (prevy - prevy1);
}
else
{
x1 = prevx;
y1 = prevy;
}
break;
}
case "q":
case "Q":
{
var pointlist = GeometryUtil.QuadraticBezierLinearize(new Segment(x: prevx, y: prevy), new Segment(x: x, y: y), new Segment(x: x1, y: y1), ToleranceConfig.tolerance);
pointlist.Remove(pointlist[0]); // firstpoint would already be in the poly
for (var j = 0; j < pointlist.Count; j++)
{
pathPloy.add(pointlist[j].x, pointlist[j].y);
}
break;
}
case "s":
case "S":
{
var sPathNumberType = "CcSs";
if (i > 0 && sPathNumberType.Contains(pathNumbers[i - 1].Type))
{
x1 = prevx + (prevx - prevx2);
y1 = prevy + (prevy - prevy2);
}
else
{
x1 = prevx;
y1 = prevy;
}
break;
}
case "c":
case "C":
{
var pointlist = GeometryUtil.CubicBezierLinearize(new Segment(x: prevx, y: prevy), new Segment(x: x, y: y), new Segment(x: x1, y: y1), new Segment(x: x2, y: y2), ToleranceConfig.tolerance);
pointlist.Remove(pointlist[0]); // firstpoint would already be in the poly
for (var j = 0; j < pointlist.Count; j++)
{
pathPloy.add(pointlist[j].x, pointlist[j].y);
}
break;
}
case "a":
case "A":
{
//var pointlist = GeometryUtil.Arc.linearize({ x: prevx, y: prevy}, { x: x, y: y}, s.r1, s.r2, s.angle, s.largeArcFlag,s.sweepFlag, this.conf.tolerance
//pointlist.shift();
//for (var j = 0; j < pointlist.length; j++)
//{
// var point = { };
// point.x = pointlist[j].x;
// point.y = pointlist[j].y;
// poly.push(point);
//}
break;
}
case "z":
case "Z":
{
x = x0;
y = y0;
break;
}
}
// Record the start of a subpath
if (command == "M" || command == "m")
{
x0 = x;
y0 = y;
}
}
// 判断最后一个点是不是和第一个点一样，如果一样，就去除最后一个点
while (pathPloy.getSegments().Count > 0 && GeometryUtil.almostEqual(pathPloy.getSegments()[0].x, pathPloy.getSegments()[pathPloy.getSegments().Count - 1].x, ToleranceConfig.toleranceSvg) && GeometryUtil.almostEqual(pathPloy.getSegments()[0].y, pathPloy.getSegments()[pathPloy.getSegments().Count - 1].y, ToleranceConfig.toleranceSvg))
{
pathPloy.getSegments().RemoveAt(pathPloy.getSegments().Count - 1);
}
nestPaths.Add(pathPloy);
break;
}
}
}
return(nestPaths);
}