private List<List<Point3D>> GenerateSlicePaths(Model3DGroup obj, double vs, double hs)
{
var bounds = new Rect3D();
MeshGeometry3D geom = null;
Dispatch(() => {
bounds = obj.Bounds;
geom = obj.Children.OfType<GeometryModel3D>().First().Geometry as MeshGeometry3D;
});
var res = new List<List<Point3D>>();
List<List<Point3D>> xpaths = null;
for (var i = bounds.Location.Z + bounds.Size.Z; i >= bounds.Location.Z; i -= vs)
{
IList<Tuple<int, int>> des = null;
List<Point3D> points = null;
Dispatch(() => {
// ReSharper disable once AccessToModifiedClosure
var modl = geom.Slice(new Point3D(0, 0, i - vs), new Vector3D(0, 0, vs), EPSILON);
points = modl.Positions.ToList();
des = modl.FindBottomContours(EPSILON);
});
if (des.Count == 0)
continue;
var paths = new List<List<int>>();
var dict = des.Union(des.Select(x => Tuple.Create(x.Item2, x.Item1))).GroupBy(x => x.Item1).ToDictionary(x => x.Key, x => x.Select(y => y.Item2).ToList());
while (dict.Count > 0)
{
var fp = dict.Where(x => x.Value.Count() == 1).Union(dict)
.Select(x => Tuple.Create(x.Key, x.Value.First())).FirstOrDefault();
var fpath = new List<int>();
paths.Add(fpath);
var ind = fp.Item1;
while (dict.ContainsKey(ind))
{
fpath.Add(ind);
var d = dict;
var tmp = ind;
ind = d[ind].First();
if (d.ContainsKey(tmp))
{
d[tmp].Remove(ind);
if (d[tmp].Count == 0)
d.Remove(tmp);
}
if (d.ContainsKey(ind))
{
d[ind].Remove(tmp);
if (d[ind].Count == 0)
d.Remove(ind);
}
fpath.Add(ind);
}
}
var paths1 = paths.FixMergeIndexPaths(points, EPSILON).Select(x => x.Select(y => points[y]).ToList()).ToList();
var hstep = 4;
xpaths = xpaths.ClipPaths(paths1, ClipType.Union, i, EPSILON).RemoveSmallPolygons(1, hstep*3, hstep).FixPointPaths();
var co = new ClipperOffset();
co.AddPaths(xpaths.ChangePointUnits(), JoinType.Round, EndType.ClosedPolygon);
var xpathsres = new List<List<Point3D>>();
var j = 1;
do
{
int nonFixed;
var xpathsn = co.Execute(hs*j).ChangePointUnits(i - bounds.Location.Z).FixBounds(bounds, hs*3, out nonFixed);
if (nonFixed == 0)
break;
j++;
xpathsres = xpathsres.Union(xpathsn).ToList();
} while (true);
xpathsres.JoinNearPoints(EPSILON);
res.AddRange(xpathsres);
}
return res;
}
private async Task FlatFileOpen()
{
var path = fileDialogService.OpenFileDialog("models", null, PointImporterExporterFactory.OpenFileDialogFilter, PointImporterExporterFactory.OpenFileDialogDefault);
if (!string.IsNullOrEmpty(path))
{
var cpx = PointImporterExporterFactory.Import(path);
if (cpx != null)
{
var ctx = cpx.Bounds;
if (ctx != null)
cpx.MoveBy(new Point(-(ctx.Item1.X + ctx.Item2.X) / 2, -(ctx.Item1.Y + ctx.Item2.Y) / 2));
var cp = cpx.FlattenHierarchy();
var co = new ClipperOffset();
co.AddPaths(cp.Select(x => x.Select(y => y).ToList()).ToList(), JoinType.Round, EndType.ClosedPolygon);
CurrentPaths = co.Execute(DRILL_STEP, EPSILON).Select((x, i) => x.Select(y => new Point3D(y.X, y.Y, 0)).ToList()).ToList();
}
}
}