/// <summary>
/// Compute inset from input polygon. If requested, will check for
/// topological changes and try smaller insets, and if that fails,
/// will just return input polygon.
/// </summary>
protected virtual List <GeneralPolygon2d> ComputeInitialInsetPolygon(
bool bForcePreserveTopology)
{
double fInset = ToolWidth * InsetFromInputPolygonX;
List <GeneralPolygon2d> insetPolys =
ClipperUtil.MiterOffset(Polygon, -fInset);
if (bForcePreserveTopology == false)
{
return(insetPolys);
}
if (check_large_topology_change(Polygon, insetPolys, fInset))
{
fInset /= 2;
insetPolys = ClipperUtil.MiterOffset(Polygon, -fInset);
if (check_large_topology_change(Polygon, insetPolys, fInset))
{
insetPolys = new List <GeneralPolygon2d>()
{
Polygon
}
}
;
}
return(insetPolys);
}
public List <FillPolyline2d> thin_offset(GeneralPolygon2d p)
{
List <FillPolyline2d> result = new List <FillPolyline2d>();
// to support non-hole thin offsets we need to return polylines
if (p.Holes.Count == 0)
{
return(result);
}
// compute desired offset from outer polygon
GeneralPolygon2d outer = new GeneralPolygon2d(p.Outer);
List <GeneralPolygon2d> offsets =
ClipperUtil.ComputeOffsetPolygon(outer, -ToolWidth, true);
if (offsets == null || offsets.Count == 0)
{
return(result);
}
double clip_dist = ToolWidth * ToolWidthClipMultiplier;
foreach (GeneralPolygon2d offset_poly in offsets)
{
List <FillPolyline2d> clipped = clip_to_band(offset_poly.Outer, p, clip_dist);
result.AddRange(clipped);
}
return(result);
}
public static List <GeneralPolygon2d> ComputeOffsetPolygon(GeneralPolygon2d poly, double fOffset, bool bMiter = false)
{
double nIntScale = GetIntScale(poly);
CPolygonList clipper_polys = new CPolygonList();
clipper_polys.Add(ClipperUtil.ConvertToClipper(poly.Outer, nIntScale));
foreach (Polygon2d hole in poly.Holes)
{
clipper_polys.Add(ClipperUtil.ConvertToClipper(hole, nIntScale));
}
CPolygonList dilate_solution = new CPolygonList();
try {
ClipperOffset co = new ClipperOffset();
if (bMiter)
{
co.AddPaths(clipper_polys, JoinType.jtMiter, EndType.etClosedPolygon);
}
else
{
co.AddPaths(clipper_polys, JoinType.jtRound, EndType.etClosedPolygon);
}
co.Execute(ref dilate_solution, fOffset * nIntScale);
} catch /*( Exception e )*/ {
//System.Diagnostics.Debug.WriteLine("ClipperUtil.ComputeOffsetPolygon: Clipper threw exception: " + e.Message);
return(new List <GeneralPolygon2d>());
}
List <GeneralPolygon2d> polys = ClipperUtil.ConvertFromClipper(dilate_solution, nIntScale);
return(polys);
}
public bool Compute()
{
if (InsetFromInputPolygon)
{
//BoundaryPolygonCache = new SegmentSet2d(Polygon);
List <GeneralPolygon2d> current = ClipperUtil.ComputeOffsetPolygon(Polygon, -ToolWidth / 2, true);
foreach (GeneralPolygon2d poly in current)
{
FillCurveSet2d fillPaths = ComputeFillPaths(poly);
if (fillPaths != null)
{
FillCurves.Add(fillPaths);
}
}
}
else
{
List <GeneralPolygon2d> boundary = ClipperUtil.ComputeOffsetPolygon(Polygon, ToolWidth / 2, true);
//BoundaryPolygonCache = new SegmentSet2d(boundary);
FillCurveSet2d fillPaths = ComputeFillPaths(Polygon);
if (fillPaths != null)
{
FillCurves.Add(fillPaths);
}
}
return(true);
}
/// <summary>
/// Shrink holes inside polys such that if we do offset/2, the hole and
/// outer offsets will (probably) not collide. Two options:
/// 1) contract and then dilate each hole. This doesn't handle long skinny holes?
/// 2) shrink outer by offset and then intersect with holes
/// Currently using (2). This is better, right?
/// </summary>
protected void FilterHoles(List <GeneralPolygon2d> polys, double offset)
{
foreach (var poly in polys)
{
if (poly.Holes.Count == 0)
{
continue;
}
List <GeneralPolygon2d> outer_inset = ClipperUtil.MiterOffset(
new GeneralPolygon2d(poly.Outer), -offset);
List <GeneralPolygon2d> hole_polys = new List <GeneralPolygon2d>();
foreach (var hole in poly.Holes)
{
hole.Reverse();
hole_polys.Add(new GeneralPolygon2d(hole));
}
//List<GeneralPolygon2d> contracted = ClipperUtil.MiterOffset(hole_polys, -offset, 0.01);
//List<GeneralPolygon2d> dilated = ClipperUtil.MiterOffset(hole_polys, offset, 0.01);
List <GeneralPolygon2d> dilated = ClipperUtil.Intersection(hole_polys, outer_inset, 0.01);
poly.ClearHoles();
List <Polygon2d> new_holes = new List <Polygon2d>();
foreach (var dpoly in dilated)
{
dpoly.Outer.Reverse();
poly.AddHole(dpoly.Outer, false, false);
}
}
}
public bool Compute()
{
if (InsetFromInputPolygon)
{
double inset = ToolWidth * InsetFromInputPolygonX;
var current = ClipperUtil.ComputeOffsetPolygon(Polygon, -inset, true);
foreach (var poly in current)
{
FillCurveSet2d fillPaths = ComputeFillPaths(poly);
if (fillPaths != null)
{
FillCurves.Add(fillPaths);
}
}
}
else
{
FillCurveSet2d fillPaths = ComputeFillPaths(Polygon);
if (fillPaths != null)
{
FillCurves.Add(fillPaths);
}
}
return(true);
}
protected virtual List <GeneralPolygon2d> make_solid(GeneralPolygon2d poly, bool bIsSupportSolid)
{
// always do a self-union of outer polygon. This allows Clipper to clean up many
// problems in input polygons, eg self-intersections and other junk
GeneralPolygon2d gouter = new GeneralPolygon2d(poly.Outer);
List <GeneralPolygon2d> resolvedSolid =
ClipperUtil.Union(gouter, gouter, MIN_AREA);
// solid may contain overlapping holes. We need to resolve these before continuing,
// otherwise those overlapping regions will be filled by Clipper even/odd rules
foreach (Polygon2d hole in poly.Holes)
{
GeneralPolygon2d holePoly = new GeneralPolygon2d(hole);
resolvedSolid = ClipperUtil.PolygonBoolean(resolvedSolid, holePoly, ClipperUtil.BooleanOp.Difference, MIN_AREA);
}
if (bIsSupportSolid == false && Thickened != null)
{
// Subtract away any clearance solids
foreach (var pair in Thickened)
{
if (pair.Key != poly)
{
resolvedSolid = ClipperUtil.Difference(resolvedSolid, pair.Value);
}
}
}
return(filter_solids(resolvedSolid));
}
/*
* functions for subclasses to override to customize behavior
*/
protected virtual GeneralPolygon2d[] process_input_polys_before_sort(GeneralPolygon2d[] polys)
{
if (Offsets.Count == 0)
{
return(polys);
}
List <GeneralPolygon2d> newPolys = new List <GeneralPolygon2d>();
bool modified = false;
foreach (var poly in polys)
{
double offset;
if (Offsets.TryGetValue(poly, out offset) && Math.Abs(offset) > MathUtil.ZeroTolerancef)
{
List <GeneralPolygon2d> offsetPolys = ClipperUtil.MiterOffset(poly, offset);
foreach (var newpoly in offsetPolys)
{
transfer_tags(poly, newpoly);
newPolys.Add(newpoly);
}
modified = true;
}
else
{
newPolys.Add(poly);
}
}
if (modified == false)
{
return(polys);
}
return(newPolys.ToArray());
}
protected virtual List <GeneralPolygon2d> ApplyValidRegions(List <GeneralPolygon2d> polygonsIn)
{
if (ValidRegions == null || ValidRegions.Count == 0)
{
return(polygonsIn);
}
return(ClipperUtil.Intersection(polygonsIn, ValidRegions));
}
protected virtual List <PolyLine2d> ApplyValidRegions(List <PolyLine2d> plinesIn)
{
if (ValidRegions == null || ValidRegions.Count == 0)
{
return(plinesIn);
}
List <PolyLine2d> clipped = new List <PolyLine2d>();
foreach (var pline in plinesIn)
{
clipped.AddRange(ClipperUtil.ClipAgainstPolygon(ValidRegions, pline, true));
}
return(clipped);
}
protected virtual GeneralPolygon2d[] process_input_polys_after_sort(GeneralPolygon2d[] solids)
{
// construct thickened solids
Thickened = new Dictionary <GeneralPolygon2d, List <GeneralPolygon2d> >();
for (int k = 0; k < solids.Length; ++k)
{
double clearance;
if (Clearances.TryGetValue(solids[k], out clearance) && clearance > 0)
{
Thickened.Add(solids[k], ClipperUtil.MiterOffset(solids[k], clearance));
}
}
return(solids);
}
private LayerCache build_cache(PrintLayerData layerData)
{
LayerCache cache = new LayerCache();
cache.SupportAreas = ClipperUtil.MiterOffset(layerData.SupportAreas, layerData.Settings.Machine.NozzleDiamMM);
cache.SupportAreaBounds = new AxisAlignedBox2d[cache.SupportAreas.Count];
cache.AllSupportBounds = AxisAlignedBox2d.Empty;
for (int i = 0; i < cache.SupportAreas.Count; ++i)
{
cache.SupportAreaBounds[i] = cache.SupportAreas[i].Bounds;
cache.AllSupportBounds.Contain(cache.SupportAreaBounds[i]);
}
return(cache);
}
virtual protected void cache_brim_polys()
{
combined_solid = new List <GeneralPolygon2d>();
combined_support = new List <GeneralPolygon2d>();
subtract = new List <GeneralPolygon2d>();
Frame3f cutPlane = new Frame3f((float)layer_height * 0.5f * Vector3f.AxisY, Vector3f.AxisY);
foreach (var so in CC.Objects.PrintMeshes)
{
if (so.Settings.ObjectType == PrintMeshSettings.ObjectTypes.Ignored)
{
continue;
}
SOSectionPlane section = new SOSectionPlane(so);
section.UpdateSection(cutPlane, CoordSpace.SceneCoords);
List <GeneralPolygon2d> solids = section.GetSolids();
// [TODO] should subtract holes explicitly here, like we do in slicer?
if (so.Settings.ObjectType == PrintMeshSettings.ObjectTypes.Cavity)
{
subtract = ClipperUtil.Union(solids, subtract);
}
else if (so.Settings.ObjectType == PrintMeshSettings.ObjectTypes.Support)
{
combined_support = ClipperUtil.Union(solids, combined_support);
}
else if (so.Settings.ObjectType == PrintMeshSettings.ObjectTypes.Solid)
{
combined_solid = ClipperUtil.Union(solids, combined_solid);
}
}
if (subtract.Count > 0)
{
combined_solid = ClipperUtil.Difference(combined_solid, subtract);
}
combined_all = ClipperUtil.Union(combined_solid, combined_support);
combined_all = CurveUtils2.FilterDegenerate(combined_all, 0.001);
foreach (var poly in combined_all)
{
poly.Simplify(path_width * 0.02);
}
}
protected override List <GeneralPolygon2d> make_solid(GeneralPolygon2d poly, bool bIsSupportSolid)
{
List <GeneralPolygon2d> solid = base.make_solid(poly, bIsSupportSolid);
if (bIsSupportSolid == false && Thickened != null)
{
// subtract clearance solids
foreach (var pair in Thickened)
{
if (pair.Key != poly)
{
solid = ClipperUtil.Difference(solid, pair.Value);
}
}
}
return(solid);
}
protected virtual List <GeneralPolygon2d> remove_cavity(List <GeneralPolygon2d> solids, GeneralPolygon2d cavity)
{
double offset = 0;
if (Cavity_Clearances.ContainsKey(cavity))
{
offset = Cavity_Clearances[cavity];
}
if (Cavity_Offsets.ContainsKey(cavity))
{
offset += Cavity_Offsets[cavity];
}
if (Math.Abs(offset) > 0.0001)
{
var offset_cavities = ClipperUtil.MiterOffset(cavity, offset, MIN_AREA);
return(ClipperUtil.Difference(solids, offset_cavities, MIN_AREA));
}
else
{
return(ClipperUtil.Difference(solids, cavity, MIN_AREA));
}
}
public bool Compute()
{
if (InsetFromInputPolygon)
{
BoundaryPolygonCache = new SegmentSet2d(Polygon);
List <GeneralPolygon2d> current = ClipperUtil.ComputeOffsetPolygon(Polygon, -ToolWidth / 2, true);
foreach (GeneralPolygon2d poly in current)
{
SegmentSet2d polyCache = new SegmentSet2d(poly);
Paths.Add(ComputeFillPaths(poly, polyCache));
}
}
else
{
List <GeneralPolygon2d> boundary = ClipperUtil.ComputeOffsetPolygon(Polygon, ToolWidth / 2, true);
BoundaryPolygonCache = new SegmentSet2d(boundary);
SegmentSet2d polyCache = new SegmentSet2d(Polygon);
Paths.Add(ComputeFillPaths(Polygon, polyCache));
}
return(true);
}
public static List <GeneralPolygon2d> ComputeOffsetPolygon(Polygon2d poly, double fOffset, bool bSharp = false)
{
double nIntScale = GetIntScale(poly.Vertices);
List <IntPoint> clipper_poly = ClipperUtil.ConvertToClipper(poly, nIntScale);
CPolygonList clipper_polys = new CPolygonList()
{
clipper_poly
};
CPolygonList dilate_solution = new CPolygonList();
try {
ClipperOffset co = new ClipperOffset();
if (bSharp)
{
co.AddPaths(clipper_polys, JoinType.jtMiter, EndType.etClosedPolygon);
}
else
{
co.AddPaths(clipper_polys, JoinType.jtRound, EndType.etClosedPolygon);
}
co.Execute(ref dilate_solution, fOffset * nIntScale);
} catch /*( Exception e )*/ {
//System.Diagnostics.Debug.WriteLine("ClipperUtil.ComputeOffsetPolygon: Clipper threw exception: " + e.Message);
return(new List <GeneralPolygon2d>());
}
if (dilate_solution.Count == 0)
{
return(new List <GeneralPolygon2d>());
}
List <GeneralPolygon2d> polys = ClipperUtil.ConvertFromClipper(dilate_solution, nIntScale);
return(polys);
}
protected virtual List <GeneralPolygon2d> remove_cavity(List <GeneralPolygon2d> solids, GeneralPolygon2d cavity)
{
return(ClipperUtil.Difference(solids, cavity, MIN_AREA));
}
public bool Compute()
{
AxisAlignedBox2d bounds = Polygon.Bounds;
ScaleGridIndexer2 index = new ScaleGridIndexer2()
{
CellSize = TileSize
};
Vector2i min = index.ToGrid(bounds.Min) - Vector2i.One;
Vector2i max = index.ToGrid(bounds.Max);
List <Tile> Tiles = new List <Tile>();
for (int y = min.y; y <= max.y; ++y)
{
for (int x = min.x; x <= max.x; ++x)
{
Tile t = new Tile();
t.index = new Vector2i(x, y);
Vector2d tile_min = index.FromGrid(t.index);
Vector2d tile_max = index.FromGrid(t.index + Vector2i.One);
AxisAlignedBox2d tile_box = new AxisAlignedBox2d(tile_min, tile_max);
tile_box.Expand(TileOverlap);
t.poly = new Polygon2d(new Vector2d[] { tile_box.GetCorner(0), tile_box.GetCorner(1), tile_box.GetCorner(2), tile_box.GetCorner(3) });
Tiles.Add(t);
}
}
gParallel.ForEach(Tiles, (tile) =>
{
tile.regions =
ClipperUtil.PolygonBoolean(Polygon, new GeneralPolygon2d(tile.poly), ClipperUtil.BooleanOp.Intersection);
});
List <ICurvesFillPolygon> all_fills = new List <ICurvesFillPolygon>();
foreach (Tile t in Tiles)
{
if (t.regions.Count == 0)
{
continue;
}
t.fills = new ICurvesFillPolygon[t.regions.Count];
for (int k = 0; k < t.regions.Count; ++k)
{
t.fills[k] = TileFillGeneratorF(t.regions[k], t.index);
if (t.fills[k] != null)
{
all_fills.Add(t.fills[k]);
}
}
}
gParallel.ForEach(all_fills, (fill) =>
{
fill.Compute();
});
FillCurves = new List <FillCurveSet2d>();
foreach (ICurvesFillPolygon fill in all_fills)
{
List <FillCurveSet2d> result = fill.GetFillCurves();
if (result != null && result.Count > 0)
{
FillCurves.AddRange(result);
}
}
return(true);
}
/// <summary>
/// Slice the meshes and return the slice stack.
/// </summary>
public Result Compute()
{
Result result = new Result();
if (Meshes.Count == 0)
{
return(result);
}
// find Z interval we want to slice in
Interval1d zrange = Interval1d.Empty;
foreach (var meshinfo in Meshes)
{
zrange.Contain(meshinfo.bounds.Min.z);
zrange.Contain(meshinfo.bounds.Max.z);
}
if (SetMinZValue != double.MinValue)
{
zrange.a = SetMinZValue;
}
result.TopZ = Math.Round(zrange.b, PrecisionDigits);
result.BaseZ = Math.Round(zrange.a, PrecisionDigits);
// [TODO] might be able to make better decisions if we took flat regions
// into account when constructing initial Z-heights? if we have large flat
// region just below Zstep, might make sense to do two smaller Z-steps so we
// can exactly hit it??
// construct list of clearing Z-heights
List <double> clearingZLayers = new List <double>();
double cur_layer_z = zrange.b;
int layer_i = 0;
while (cur_layer_z > zrange.a)
{
double layer_height = get_layer_height(layer_i);
cur_layer_z -= layer_height;
double z = Math.Round(cur_layer_z, PrecisionDigits);
clearingZLayers.Add(z);
layer_i++;
}
if (clearingZLayers.Last() < result.BaseZ)
{
clearingZLayers[clearingZLayers.Count - 1] = result.BaseZ;
}
if (clearingZLayers.Last() == clearingZLayers[clearingZLayers.Count - 2])
{
clearingZLayers.RemoveAt(clearingZLayers.Count - 1);
}
// construct layer slices from Z-heights
List <PlanarSlice> clearing_slice_list = new List <PlanarSlice>();
layer_i = 0;
for (int i = 0; i < clearingZLayers.Count; ++i)
{
double layer_height = (i == clearingZLayers.Count - 1) ?
(result.TopZ - clearingZLayers[i]) : (clearingZLayers[i + 1] - clearingZLayers[i]);
double z = clearingZLayers[i];
Interval1d zspan = new Interval1d(z, z + layer_height);
if (SliceLocation == SliceLocations.EpsilonBase)
{
z += 0.001;
}
PlanarSlice slice = SliceFactoryF(zspan, z, layer_i);
clearing_slice_list.Add(slice);
layer_i++;
}
int NH = clearing_slice_list.Count;
if (NH > MaxLayerCount)
{
throw new Exception("MeshPlanarSlicer.Compute: exceeded layer limit. Increase .MaxLayerCount.");
}
PlanarSlice[] clearing_slices = clearing_slice_list.ToArray();
// assume Resolve() takes 2x as long as meshes...
TotalCompute = (Meshes.Count * NH) + (2 * NH);
Progress = 0;
// compute slices separately for each mesh
for (int mi = 0; mi < Meshes.Count; ++mi)
{
if (Cancelled())
{
break;
}
DMesh3 mesh = Meshes[mi].mesh;
PrintMeshOptions mesh_options = Meshes[mi].options;
// [TODO] should we hang on to this spatial? or should it be part of assembly?
DMeshAABBTree3 spatial = new DMeshAABBTree3(mesh, true);
AxisAlignedBox3d bounds = Meshes[mi].bounds;
bool is_cavity = mesh_options.IsCavity;
bool is_crop = mesh_options.IsCropRegion;
bool is_support = mesh_options.IsSupport;
bool is_closed = (mesh_options.IsOpen) ? false : mesh.IsClosed();
var useOpenMode = (mesh_options.OpenPathMode == PrintMeshOptions.OpenPathsModes.Default) ?
DefaultOpenPathMode : mesh_options.OpenPathMode;
if (is_crop || is_support)
{
throw new Exception("Not supported!");
}
// each layer is independent so we can do in parallel
gParallel.ForEach(Interval1i.Range(NH), (i) => {
if (Cancelled())
{
return;
}
double z = clearing_slices[i].Z;
if (z < bounds.Min.z || z > bounds.Max.z)
{
return;
}
// compute cut
Polygon2d[] polys; PolyLine2d[] paths;
ComputeSlicePlaneCurves(mesh, spatial, z, is_closed, out polys, out paths);
if (is_closed)
{
// construct planar complex and "solids"
// (ie outer polys and nested holes)
PlanarComplex complex = new PlanarComplex();
foreach (Polygon2d poly in polys)
{
complex.Add(poly);
}
PlanarComplex.FindSolidsOptions options
= PlanarComplex.FindSolidsOptions.Default;
options.WantCurveSolids = false;
options.SimplifyDeviationTolerance = 0.001;
options.TrustOrientations = true;
options.AllowOverlappingHoles = true;
PlanarComplex.SolidRegionInfo solids = complex.FindSolidRegions(options);
List <GeneralPolygon2d> solid_polygons = ApplyValidRegions(solids.Polygons);
if (is_cavity)
{
add_cavity_polygons(clearing_slices[i], solid_polygons, mesh_options);
}
else
{
if (ExpandStockAmount > 0)
{
solid_polygons = ClipperUtil.MiterOffset(solid_polygons, ExpandStockAmount);
}
add_solid_polygons(clearing_slices[i], solid_polygons, mesh_options);
}
}
Interlocked.Increment(ref Progress);
}); // end of parallel.foreach
} // end mesh iter
// resolve planar intersections, etc
gParallel.ForEach(Interval1i.Range(NH), (i) => {
if (Cancelled())
{
return;
}
clearing_slices[i].Resolve();
Interlocked.Add(ref Progress, 2);
});
// add to clearing stack
result.Clearing = SliceStackFactoryF();
for (int k = 0; k < clearing_slices.Length; ++k)
{
result.Clearing.Add(clearing_slices[k]);
}
/*
* Horizontal planar regions finishing pass.
* First we find all planar horizontal Z-regions big enough to mill.
* Then we add slices at the Z's we haven't touched yet.
*
* Cannot just 'fill' planar regions because we will miss edges that might
* be millable. So we grow region and then intersect with full-slice millable area.
*/
// find set of horizontal flat regions
Dictionary <double, List <PlanarRegion> > flat_regions = FindPlanarZRegions(ToolDiameter);
if (flat_regions.Count == 0)
{
goto done_slicing;
}
// if we have already milled this exact Z-height in clearing pass, then we can skip it
List <double> doneZ = new List <double>();
foreach (double z in flat_regions.Keys)
{
if (clearingZLayers.Contains(z))
{
doneZ.Add(z);
}
}
foreach (var z in doneZ)
{
flat_regions.Remove(z);
}
// create slice for each layer
PlanarSlice[] horz_slices = new PlanarSlice[flat_regions.Count];
List <double> flatZ = new List <double>(flat_regions.Keys);
flatZ.Sort();
for (int k = 0; k < horz_slices.Length; ++k)
{
double z = flatZ[k];
Interval1d zspan = new Interval1d(z, z + LayerHeightMM);
horz_slices[k] = SliceFactoryF(zspan, z, k);
// compute full millable region slightly above this slice.
PlanarSlice clip_slice = ComputeSolidSliceAtZ(z + 0.0001, false);
clip_slice.Resolve();
// extract planar polys
List <Polygon2d> polys = GetPlanarPolys(flat_regions[z]);
PlanarComplex complex = new PlanarComplex();
foreach (Polygon2d poly in polys)
{
complex.Add(poly);
}
// convert to planar solids
PlanarComplex.FindSolidsOptions options
= PlanarComplex.FindSolidsOptions.SortPolygons;
options.SimplifyDeviationTolerance = 0.001;
options.TrustOrientations = true;
options.AllowOverlappingHoles = true;
PlanarComplex.SolidRegionInfo solids = complex.FindSolidRegions(options);
List <GeneralPolygon2d> solid_polygons = ApplyValidRegions(solids.Polygons);
// If planar solid has holes, then when we do inset later, we might lose
// too-thin parts. Shrink the holes to avoid this case.
//FilterHoles(solid_polygons, 0.55 * ToolDiameter);
// ok now we need to expand region and intersect with full region.
solid_polygons = ClipperUtil.MiterOffset(solid_polygons, ToolDiameter * 0.5, 0.0001);
solid_polygons = ClipperUtil.Intersection(solid_polygons, clip_slice.Solids, 0.0001);
// Same idea as above, but if we do after, we keep more of the hole and
// hence do less extra clearing.
// Also this could then be done at the slicer level instead of here...
// (possibly this entire thing should be done at slicer level, except we need clip_slice!)
FilterHoles(solid_polygons, 1.1 * ToolDiameter);
add_solid_polygons(horz_slices[k], solid_polygons, PrintMeshOptions.Default());
}
// resolve planar intersections, etc
int NF = horz_slices.Length;
gParallel.ForEach(Interval1i.Range(NF), (i) => {
if (Cancelled())
{
return;
}
horz_slices[i].Resolve();
Interlocked.Add(ref Progress, 2);
});
// add to clearing stack
result.HorizontalFinish = SliceStackFactoryF();
for (int k = 0; k < horz_slices.Length; ++k)
{
result.HorizontalFinish.Add(horz_slices[k]);
}
done_slicing:
return(result);
}
protected virtual void fill_bridge_region_decompose(GeneralPolygon2d poly, IFillPathScheduler2d scheduler, PrintLayerData layer_data)
{
poly.Simplify(0.1, 0.01, true);
TriangulatedPolygonGenerator generator = new TriangulatedPolygonGenerator()
{
Polygon = poly, Subdivisions = 16
};
DMesh3 mesh = generator.Generate().MakeDMesh();
//Util.WriteDebugMesh(mesh, "/Users/rms/scratch/bridgemesh.obj");
//List<Polygon2d> polys = decompose_mesh_recursive(mesh);
List <Polygon2d> polys = decompose_cluster_up(mesh);
Util.WriteDebugMesh(mesh, "/Users/rms/scratch/bridgemesh_reduce.obj");
double spacing = Settings.BridgeFillPathSpacingMM();
foreach (Polygon2d polypart in polys)
{
Box2d box = polypart.MinimalBoundingBox(0.00001);
Vector2d axis = (box.Extent.x > box.Extent.y) ? box.AxisY : box.AxisX;
double angle = Math.Atan2(axis.y, axis.x) * MathUtil.Rad2Deg;
GeneralPolygon2d gp = new GeneralPolygon2d(polypart);
ShellsFillPolygon shells_fill = new ShellsFillPolygon(gp);
shells_fill.PathSpacing = Settings.SolidFillPathSpacingMM();
shells_fill.ToolWidth = Settings.Machine.NozzleDiamMM;
shells_fill.Layers = 1;
shells_fill.InsetFromInputPolygonX = 0.25;
shells_fill.ShellType = ShellsFillPolygon.ShellTypes.BridgeShell;
shells_fill.FilterSelfOverlaps = false;
shells_fill.Compute();
scheduler.AppendCurveSets(shells_fill.GetFillCurves());
var fillPolys = shells_fill.InnerPolygons;
double offset = Settings.Machine.NozzleDiamMM * Settings.SolidFillBorderOverlapX;
fillPolys = ClipperUtil.MiterOffset(fillPolys, offset);
foreach (var fp in fillPolys)
{
BridgeLinesFillPolygon fill_gen = new BridgeLinesFillPolygon(fp)
{
InsetFromInputPolygon = false,
PathSpacing = spacing,
ToolWidth = Settings.Machine.NozzleDiamMM,
AngleDeg = angle,
};
fill_gen.Compute();
scheduler.AppendCurveSets(fill_gen.GetFillCurves());
}
}
// fit bbox to try to find fill angle that has shortest spans
//Box2d box = poly.Outer.MinimalBoundingBox(0.00001);
//Vector2d axis = (box.Extent.x > box.Extent.y) ? box.AxisY : box.AxisX;
//double angle = Math.Atan2(axis.y, axis.x) * MathUtil.Rad2Deg;
// [RMS] should we do something like this?
//if (Settings.SolidFillBorderOverlapX > 0) {
// double offset = Settings.Machine.NozzleDiamMM * Settings.SolidFillBorderOverlapX;
// fillPolys = ClipperUtil.MiterOffset(fillPolys, offset);
//}
}
public bool Compute()
{
bool enable_thin_check = false;
double thin_check_offset = ToolWidth * 0.45;
double thin_check_thresh_sqr = ToolWidth * 0.3;
thin_check_thresh_sqr *= thin_check_thresh_sqr;
// first shell is either polygon, or inset from that polygon
List <GeneralPolygon2d> current = null;
if (InsetFromInputPolygonX != 0)
{
current = ComputeInitialInsetPolygon(PreserveInputInsetTopology);
}
else
{
current = new List <GeneralPolygon2d>()
{
Polygon
};
}
List <GeneralPolygon2d> current_prev = null;
if (current.Count == 0)
{
HandleTinyPolygon();
return(true);
}
// convert previous layer to shell, and then compute next layer
List <GeneralPolygon2d> failedShells = new List <GeneralPolygon2d>();
List <GeneralPolygon2d> nextShellTooThin = new List <GeneralPolygon2d>();
for (int i = 0; i < Layers; ++i)
{
FillCurveSet2d paths = ShellPolysToPaths(current, i);
Shells.Add(paths);
List <GeneralPolygon2d> all_next = new List <GeneralPolygon2d>();
foreach (GeneralPolygon2d gpoly in current)
{
List <GeneralPolygon2d> offsets =
ClipperUtil.ComputeOffsetPolygon(gpoly, -PathSpacing, true);
List <GeneralPolygon2d> filtered = new List <GeneralPolygon2d>();
foreach (var v in offsets)
{
bool bTooSmall = (v.Perimeter < DiscardTinyPerimterLengthMM ||
v.Area < DiscardTinyPolygonAreaMM2);
if (bTooSmall)
{
continue;
}
if (enable_thin_check && is_too_thin(v, thin_check_offset, thin_check_thresh_sqr))
{
nextShellTooThin.Add(v);
}
else
{
filtered.Add(v);
}
}
if (filtered.Count == 0)
{
failedShells.Add(gpoly);
}
else
{
all_next.AddRange(filtered);
}
}
current_prev = current;
current = all_next;
}
// failedShells have no space for internal contours. But
// we might be able to fit a single line...
//foreach (GeneralPolygon2d gpoly in failedShells) {
// if (gpoly.Perimeter < DiscardTinyPerimterLengthMM ||
// gpoly.Area < DiscardTinyPolygonAreaMM2)
// continue;
// List<FillPolyline2d> thin_shells = thin_offset(gpoly);
// Shells[Shells.Count - 1].Append(thin_shells);
//}
// remaining inner polygons
if (InsetInnerPolygons)
{
InnerPolygons = current;
InnerPolygons.AddRange(nextShellTooThin);
}
else
{
InnerPolygons = current_prev;
InnerPolygons.AddRange(nextShellTooThin);
}
return(true);
}
protected virtual List <GeneralPolygon2d> combine_solids(List <GeneralPolygon2d> all_solids, List <GeneralPolygon2d> new_solids)
{
return(ClipperUtil.PolygonBoolean(all_solids, new_solids, ClipperUtil.BooleanOp.Union, MIN_AREA));
}
/// <summary>
/// Convert assembly of polygons, polylines, etc, into a set of printable solids and paths
/// </summary>
public virtual void Resolve()
{
// combine solids, process largest-to-smallest
if (InputSolids.Count > 0)
{
GeneralPolygon2d[] solids = InputSolids.ToArray();
solids = process_input_polys_before_sort(solids);
// sort by decreasing weight
double[] weights = new double[solids.Length];
for (int i = 0; i < solids.Length; ++i)
{
weights[i] = sorting_weight(solids[i]);
}
Array.Sort(weights, solids); Array.Reverse(solids);
solids = process_input_polys_after_sort(solids);
Solids = new List <GeneralPolygon2d>();
for (int k = 0; k < solids.Length; ++k)
{
// convert this polygon into the solid we want to use
List <GeneralPolygon2d> resolvedSolid = make_solid(solids[k], false);
// now union in with accumulated solids
if (Solids.Count == 0)
{
Solids.AddRange(resolvedSolid);
}
else
{
Solids = combine_solids(Solids, resolvedSolid);
}
}
}
// subtract input cavities
foreach (var cavity in InputCavities)
{
Solids = remove_cavity(Solids, cavity);
}
// subtract thickened embedded paths from solids
if (EmbeddedPaths.Count > 0 && EmbeddedPathWidth == 0)
{
throw new Exception("PlanarSlice.Resolve: must set embedded path width!");
}
foreach (var path in EmbeddedPaths)
{
Polygon2d thick_path = make_thickened_path(path, EmbeddedPathWidth);
Solids = ClipperUtil.Difference(Solids, new GeneralPolygon2d(thick_path), MIN_AREA);
Paths.Add(path);
}
// cleanup
Solids = filter_solids(Solids);
// subtract solids from clipped paths
foreach (var path in ClippedPaths)
{
List <PolyLine2d> clipped = ClipperUtil.ClipAgainstPolygon(Solids, path);
foreach (var cp in clipped)
{
Paths.Add(cp);
}
}
// combine support solids, while also subtracting print solids and thickened paths
if (InputSupportSolids.Count > 0)
{
// make assembly of path solids
// [TODO] do we need to boolean these?
List <GeneralPolygon2d> path_solids = null;
if (Paths.Count > 0)
{
path_solids = new List <GeneralPolygon2d>();
foreach (var path in Paths)
{
path_solids.Add(new GeneralPolygon2d(make_thickened_path(path, EmbeddedPathWidth)));
}
}
foreach (var solid in InputSupportSolids)
{
// convert this polygon into the solid we want to use
List <GeneralPolygon2d> resolved = make_solid(solid, true);
// now subtract print solids
resolved = ClipperUtil.PolygonBoolean(resolved, Solids, ClipperUtil.BooleanOp.Difference, MIN_AREA);
// now subtract paths
if (path_solids != null)
{
resolved = ClipperUtil.PolygonBoolean(resolved, path_solids, ClipperUtil.BooleanOp.Difference, MIN_AREA);
}
// now union in with accumulated support solids
if (SupportSolids.Count == 0)
{
SupportSolids.AddRange(resolved);
}
else
{
SupportSolids = ClipperUtil.PolygonBoolean(SupportSolids, resolved, ClipperUtil.BooleanOp.Union, MIN_AREA);
}
}
SupportSolids = filter_solids(SupportSolids);
}
// apply crop regions
if (InputCropRegions.Count > 0)
{
// combine crop regions
var CropRegions = make_solid(InputCropRegions[0], false);
for (int k = 1; k < InputCropRegions.Count; ++k)
{
CropRegions = combine_solids(CropRegions, make_solid(InputCropRegions[k], false));
}
Solids = ClipperUtil.Intersection(CropRegions, Solids, MIN_AREA);
Solids = filter_solids(Solids);
List <PolyLine2d> cropped_paths = new List <PolyLine2d>();
foreach (var path in Paths)
{
cropped_paths.AddRange(ClipperUtil.ClipAgainstPolygon(CropRegions, path, true));
}
// TODO: filter paths
SupportSolids = ClipperUtil.Intersection(CropRegions, SupportSolids, MIN_AREA);
SupportSolids = filter_solids(SupportSolids);
}
}
virtual public void PreRender()
{
if (in_shutdown())
{
return;
}
if (parameters_dirty)
{
// offset
List <GeneralPolygon2d> offset = ClipperUtil.RoundOffset(combined_all, offset_distance);
// aggressively simplify after round offset...
foreach (var poly in offset)
{
poly.Simplify(path_width);
}
// subtract initial and add tiny gap so these don't get merged by slicer
if (SubtractSolids)
{
offset = ClipperUtil.Difference(offset, combined_solid);
offset = ClipperUtil.MiterOffset(offset, -path_width * 0.1);
}
offset = CurveUtils2.FilterDegenerate(offset, 0.001);
foreach (var poly in offset)
{
poly.Simplify(path_width * 0.02);
}
DMesh3 mesh = new DMesh3();
MeshEditor editor = new MeshEditor(mesh);
foreach (var poly in offset)
{
TriangulatedPolygonGenerator polygen = new TriangulatedPolygonGenerator()
{
Polygon = poly
};
editor.AppendMesh(polygen.Generate().MakeDMesh());
}
MeshTransforms.ConvertZUpToYUp(mesh);
if (mesh.TriangleCount > 0)
{
MeshExtrudeMesh extrude = new MeshExtrudeMesh(mesh);
extrude.ExtrudedPositionF = (v, n, vid) => {
return(v + Layers * layer_height * Vector3d.AxisY);
};
extrude.Extrude();
MeshTransforms.Translate(mesh, -mesh.CachedBounds.Min.y * Vector3d.AxisY);
}
PreviewSO.ReplaceMesh(mesh, true);
//Vector3d translate = scene_bounds.Point(1, -1, 1);
//translate.x += spiral.Bounds.Width + PathWidth;
//Frame3f sceneF = Frame3f.Identity.Translated((Vector3f)translate);
//PreviewSO.SetLocalFrame(sceneF, CoordSpace.SceneCoords);
parameters_dirty = false;
}
}