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experimental implicit surface

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This commit is contained in:
Lars Brubaker 2021-06-18 17:47:58 -07:00
parent 61aa0bd24a
commit 2a6809c016
1 changed files with 22 additions and 1 deletions
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23
MatterControl.MeshOperations/BooleanProcessing.cs
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@ -131,7 +131,7 @@ namespace MatterHackers.PolygonMesh
break;
}
var marchingCells = resolution;
var implicitCells = resolution;
var implicitCells = resolution * 4;
var implicitMeshs = new List<BoundedImplicitFunction3d>();
foreach (var item in items)
@ -384,12 +384,33 @@ namespace MatterHackers.PolygonMesh
return null;
}
class MWNImplicit : BoundedImplicitFunction3d
{
public DMeshAABBTree3 MeshAABBTree3;
public AxisAlignedBox3d Bounds() { return MeshAABBTree3.Bounds; }
public double Value(ref Vector3d pt)
{
return -(MeshAABBTree3.FastWindingNumber(pt) - 0.5);
}
}
public static BoundedImplicitFunction3d GetImplicitFromMesh(Mesh mesh, Matrix4X4 matrix, int numCells)
{
var meshCopy = mesh.Copy(CancellationToken.None);
meshCopy.Transform(matrix);
var meshA3 = meshCopy.ToDMesh3();
// Interesting experiment, this produces an extreamely accurate surface representation but is quite slow (even though fast) compared to voxel lookups.
#if false
DMeshAABBTree3 meshAABBTree3 = new DMeshAABBTree3(meshA3, true);
meshAABBTree3.FastWindingNumber(Vector3d.Zero); // build approximation
return new MWNImplicit()
{
MeshAABBTree3 = meshAABBTree3
};
#endif
double meshCellsize = meshA3.CachedBounds.MaxDim / numCells;
var signedDistance = new MeshSignedDistanceGrid(meshA3, meshCellsize);
signedDistance.Compute();