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intersection working

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LarsBrubaker 2021-11-19 08:44:15 -08:00
parent fdcebacbc3
commit 803cee880a
2 changed files with 51 additions and 0 deletions
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1
MatterControl.MeshOperations/BooleanProcessing.cs
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@ -407,6 +407,7 @@ namespace MatterHackers.PolygonMesh
break;
case CsgModes.Intersect:
coPlanarFaces.IntersectFaces(plane, transformedMeshes, resultsMesh, flattenedMatrix, faceIndicesToRemove);
break;
}

50
MatterControl.MeshOperations/CoPlanarFaces.cs
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@ -155,6 +155,56 @@ namespace MatterHackers.PolygonMesh
polygonShape.Vertices().TriangulateFaces(null, resultsMesh, 0, flattenedMatrix.Inverted);
}
public void IntersectFaces(Plane plane, List<Mesh> transformedMeshes, Mesh resultsMesh, Matrix4X4 flattenedMatrix, HashSet<int> faceIndicesToRemove)
{
// get all meshes that have faces on this plane
var meshesWithFaces = MeshIndicesForPlane(plane).ToList();
// we need more than one mesh
if (meshesWithFaces.Count < 2)
{
// no faces to add
return;
}
// add the faces that we should remove
foreach (var meshIndex in meshesWithFaces)
{
foreach (var faces in FacesSetsForPlaneAndMesh(plane, meshIndex))
{
faceIndicesToRemove.Add(faces.destFaceIndex);
}
}
var polygonsByMesh = new List<Polygons>();
// iterate all the meshes that need to be intersected
for (int meshIndex = 0; meshIndex < meshesWithFaces.Count; meshIndex++)
{
var unionedPoygons = new Polygons();
foreach (var removeFaceSets in FacesSetsForPlaneAndMesh(plane, meshIndex))
{
unionedPoygons = unionedPoygons.Union(GetFacePolygon(transformedMeshes[meshIndex], removeFaceSets.sourceFaceIndex, plane, flattenedMatrix));
}
polygonsByMesh.Add(unionedPoygons);
}
var total = new Polygons(polygonsByMesh[0]);
for (int i=1; i<polygonsByMesh.Count; i++)
{
var polygonShape = new Polygons();
var clipper = new Clipper();
clipper.AddPaths(total, PolyType.ptSubject, true);
clipper.AddPaths(polygonsByMesh[i], PolyType.ptClip, true);
clipper.Execute(ClipType.ctIntersection, polygonShape);
total = polygonShape;
}
// teselate and add all the new polygons
total.Vertices().TriangulateFaces(null, resultsMesh, 0, flattenedMatrix.Inverted);
}
public void UnionFaces(Plane plane, List<Mesh> transformedMeshes, Mesh resultsMesh, Matrix4X4 flattenedMatrix)
{
// get all meshes that have faces on this plane