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));
}
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));
}
}
/// <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;
}
}
protected virtual List <GeneralPolygon2d> remove_cavity(List <GeneralPolygon2d> solids, GeneralPolygon2d cavity)
{
return(ClipperUtil.Difference(solids, cavity, MIN_AREA));
}