/// <summary>
/// Resample parametric solid into polygonal solid
/// </summary>
public GeneralPolygon2d Convert(double fSpacingLength, double fSpacingT, double fDeviationTolerance)
{
GeneralPolygon2d poly = new GeneralPolygon2d();
poly.Outer = new Polygon2d(
CurveSampler2.AutoSample(this.outer, fSpacingLength, fSpacingT));
poly.Outer.Simplify(0, fDeviationTolerance);
foreach (var hole in this.Holes)
{
Polygon2d holePoly = new Polygon2d(
CurveSampler2.AutoSample(hole, fSpacingLength, fSpacingT));
holePoly.Simplify(0, fDeviationTolerance);
poly.AddHole(holePoly, false);
}
return(poly);
}
public static void Restore(GeneralPolygon2d polygon, BinaryReader reader)
{
Polygon2d outer = new Polygon2d();
Restore(outer, reader);
polygon.Outer = outer;
int hole_count = reader.ReadInt32();
for (int i = 0; i < hole_count; ++i)
{
Polygon2d holepoly = new Polygon2d();
Restore(holepoly, reader);
polygon.AddHole(holepoly, false);
}
}
// Finds set of "solid" regions - eg boundary loops with interior holes.
// Result has outer loops being clockwise, and holes counter-clockwise
public SolidRegionInfo FindSolidRegions(double fSimplifyDeviationTol = 0.1, bool bWantCurveSolids = true)
{
List <SmoothLoopElement> valid = new List <SmoothLoopElement>(LoopsItr());
int N = valid.Count;
// precompute bounding boxes
int maxid = 0;
foreach (var v in valid)
{
maxid = Math.Max(maxid, v.ID + 1);
}
AxisAlignedBox2d[] bounds = new AxisAlignedBox2d[maxid];
foreach (var v in valid)
{
bounds[v.ID] = v.Bounds();
}
// copy polygons, simplify if desired
double fClusterTol = 0.0; // don't do simple clustering, can lose corners
double fDeviationTol = fSimplifyDeviationTol;
Polygon2d[] polygons = new Polygon2d[maxid];
foreach (var v in valid)
{
Polygon2d p = new Polygon2d(v.polygon);
if (fClusterTol > 0 || fDeviationTol > 0)
{
p.Simplify(fClusterTol, fDeviationTol);
}
polygons[v.ID] = p;
}
// sort by bbox containment to speed up testing (does it??)
valid.Sort((x, y) => {
return(bounds[x.ID].Contains(bounds[y.ID]) ? -1 : 1);
});
// containment sets
bool[] bIsContained = new bool[N];
Dictionary <int, List <int> > ContainSets = new Dictionary <int, List <int> >();
// construct containment sets
for (int i = 0; i < N; ++i)
{
SmoothLoopElement loopi = valid[i];
Polygon2d polyi = polygons[loopi.ID];
for (int j = 0; j < N; ++j)
{
if (i == j)
{
continue;
}
SmoothLoopElement loopj = valid[j];
Polygon2d polyj = polygons[loopj.ID];
// cannot be contained if bounds are not contained
if (bounds[loopi.ID].Contains(bounds[loopj.ID]) == false)
{
continue;
}
// any other early-outs??
if (polyi.Contains(polyj))
{
if (ContainSets.ContainsKey(i) == false)
{
ContainSets.Add(i, new List <int>());
}
ContainSets[i].Add(j);
bIsContained[j] = true;
}
}
}
List <GeneralPolygon2d> polysolids = new List <GeneralPolygon2d>();
List <PlanarSolid2d> solids = new List <PlanarSolid2d>();
List <SmoothLoopElement> used = new List <SmoothLoopElement>();
// extract solids from containment relationships
foreach (var i in ContainSets.Keys)
{
SmoothLoopElement outer_element = valid[i];
used.Add(outer_element);
if (bIsContained[i])
{
throw new Exception("PlanarComplex.FindSolidRegions: multiply-nested regions not supported!");
}
Polygon2d outer_poly = polygons[outer_element.ID];
IParametricCurve2d outer_loop = (bWantCurveSolids) ? outer_element.source.Clone() : null;
if (outer_poly.IsClockwise == false)
{
outer_poly.Reverse();
if (bWantCurveSolids)
{
outer_loop.Reverse();
}
}
GeneralPolygon2d g = new GeneralPolygon2d();
g.Outer = outer_poly;
PlanarSolid2d s = new PlanarSolid2d();
if (bWantCurveSolids)
{
s.SetOuter(outer_loop, true);
}
foreach (int hi in ContainSets[i])
{
SmoothLoopElement he = valid[hi];
used.Add(he);
Polygon2d hole_poly = polygons[he.ID];
IParametricCurve2d hole_loop = (bWantCurveSolids) ? he.source.Clone() : null;
if (hole_poly.IsClockwise)
{
hole_poly.Reverse();
if (bWantCurveSolids)
{
hole_loop.Reverse();
}
}
try {
g.AddHole(hole_poly);
if (hole_loop != null)
{
s.AddHole(hole_loop);
}
} catch {
// don't add this hole - must intersect or something
// We should have caught this earlier!
}
}
polysolids.Add(g);
if (bWantCurveSolids)
{
solids.Add(s);
}
}
for (int i = 0; i < N; ++i)
{
SmoothLoopElement loopi = valid[i];
if (used.Contains(loopi))
{
continue;
}
Polygon2d outer_poly = polygons[loopi.ID];
IParametricCurve2d outer_loop = (bWantCurveSolids) ? loopi.source.Clone() : null;
if (outer_poly.IsClockwise == false)
{
outer_poly.Reverse();
if (bWantCurveSolids)
{
outer_loop.Reverse();
}
}
GeneralPolygon2d g = new GeneralPolygon2d();
g.Outer = outer_poly;
PlanarSolid2d s = new PlanarSolid2d();
if (bWantCurveSolids)
{
s.SetOuter(outer_loop, true);
}
polysolids.Add(g);
if (bWantCurveSolids)
{
solids.Add(s);
}
}
return(new SolidRegionInfo()
{
Polygons = polysolids,
Solids = (bWantCurveSolids) ? solids : null
});
}