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Make sure that added vertices are aligned when possible with source vertices

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This commit is contained in:
LarsBrubaker 2021-11-22 22:42:22 -08:00
parent ce314d51f3
commit d4655f2d20
2 changed files with 31 additions and 4 deletions
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33
MatterControl.MeshOperations/CsgBySlicing.cs
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@ -35,6 +35,7 @@ using ClipperLib;
using MatterHackers.Agg;
using MatterHackers.DataConverters3D;
using MatterHackers.PolygonMesh.Csg;
using MatterHackers.PolygonMesh.Processors;
using MatterHackers.RayTracer;
using MatterHackers.VectorMath;
@ -197,11 +198,37 @@ namespace MatterHackers.PolygonMesh
var preAddCount = resultsMesh.Vertices.Count;
// mesh the new polygon and add it to the resultsMesh
polygonShape.Vertices(1).TriangulateFaces(null, resultsMesh, 0, transformTo0Planes[cutPlane].inverted);
var postAddCount = resultsMesh.Vertices.Count;
// TODO: map all the added vertices that can be back to the original polygon positions
// for (int i = preAddCount; i< resultsMesh.Vertices.Count; i++)
for (int addedIndex = preAddCount; addedIndex < postAddCount; addedIndex++)
{
// TODO: map all the added vertices that can be back to the original polygon positions
for (int meshIndex = 0; meshIndex < transformedMeshes.Count; meshIndex++)
{
var bvhAccelerator = bvhAccelerators[meshIndex];
var mesh = transformedMeshes[meshIndex];
var addedPosition = resultsMesh.Vertices[addedIndex];
var touchingBvhItems = bvhAccelerator.GetTouching(new Vector3(addedPosition), .0001);
foreach (var touchingBvhItem in touchingBvhItems)
{
if (touchingBvhItem is TriangleShape triangleShape)
{
var sourceFaceIndex = triangleShape.Index;
var sourceFace = mesh.Faces[sourceFaceIndex];
var sourceVertexIndices = new int[] { sourceFace.v0, sourceFace.v1, sourceFace.v2 };
foreach (var sourceVertexIndex in sourceVertexIndices)
{
var sourcePosition = mesh.Vertices[sourceVertexIndex];
var deltaSquared = (addedPosition - sourcePosition).LengthSquared;
if (deltaSquared > 0 && deltaSquared < .00001)
{
// add the vertex and set the face position index to the new vertex
resultsMesh.Vertices[addedIndex] = sourcePosition;
}
}
}
}
}
}
}