RhinoCommon API
Namespaces
Rhino.Geometry
Mesh Class
Mesh Methods
Append Method
Check Method
ClearSurfaceData Method
ClearTextureData Method
ClosestMeshPoint Method
ClosestPoint Method
CollapseFacesByArea Method
CollapseFacesByByAspectRatio Method
CollapseFacesByEdgeLength Method
ColorAt Method
Compact Method
ComputeCurvatureApproximation Method
ComputeThickness Method
CopyFrom Method
CreateBooleanDifference Method
CreateBooleanIntersection Method
CreateBooleanSplit Method
CreateBooleanUnion Method
CreateContourCurves Method
CreateConvexHull3D Method
CreateExtrusion Method
CreateFromBox Method
CreateFromBrep Method
CreateFromClosedPolyline Method
CreateFromCone Method
CreateFromCurveExtrusion Method
CreateFromCurvePipe Method
CreateFromCylinder Method
CreateFromExtrusion Method
CreateFromFilteredFaceList Method
CreateFromIterativeCleanup Method
CreateFromLines Method
CreateFromPatchSingleFace Method
CreateFromPlanarBoundary Method
CreateFromPlane Method
CreateFromSphere Method
CreateFromSubD Method
CreateFromSubDControlNet Method
CreateFromSubDControlNetWithTextureCoordinates Method
CreateFromSurface Method
CreateFromSurfaceControlNet Method
CreateFromTessellation Method
CreateFromTorus Method
CreateIcoSphere Method
CreatePartitions Method
CreatePatch Method
CreateQuadSphere Method
CreateVertexColorsFromBitmap Method
DestroyPartition Method
DestroyTopology Method
DestroyTree Method
Duplicate Method
DuplicateMesh Method
EvaluateMeshGeometry Method
ExplodeAtUnweldedEdges Method
ExtendSelectionByEdgeRidge Method
ExtendSelectionByFaceLoop Method
ExtractNonManifoldEdges Method
FileHole Method
FillHoles Method
Flip Method
GetCachedTextureCoordinates Method
GetNakedEdgePointStatus Method
GetNakedEdges Method
GetNgonAndFacesCount Method
GetNgonAndFacesEnumerable Method
GetOutlines Method
GetPartition Method
GetSelfIntersections Method
GetUnsafeLock Method
HealNakedEdges Method
InvalidateCachedTextureCoordinates Method
IsManifold Method
IsPointInside Method
MatchEdges Method
MergeAllCoplanarFaces Method
NonConstOperation Method
NormalAt Method
Offset Method
OnSwitchToNonConst Method
PatchSingleFace Method
PointAt Method
PullCurve Method
PullPointsToMesh Method
QuadRemesh Method
QuadRemeshAsync Method
QuadRemeshBrep Method
QuadRemeshBrepAsync Method
RebuildNormals Method
Reduce Method
ReleaseUnsafeLock Method
RequireIterativeCleanup Method
SetCachedTextureCoordinates Method
SetCachedTextureCoordinatesFromMaterial Method
SetSurfaceParametersFromTextureCoordinates Method
SetTextureCoordinates Method
ShrinkWrap Method
Smooth Method
SolidOrientation Method
Split Method
SplitDisjointPieces Method
SplitWithProjectedPolylines Method
Subdivide Method
UnifyNormals Method
Unweld Method
UnweldEdge Method
UnweldVertices Method
Volume Method
Weld Method
WithDisplacement Method
WithEdgeSoftening Method
WithShutLining Method
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MeshCollapseFacesByEdgeLength Method

Collapses multiple mesh faces, with greater/less than edge length, based on the principles found in Stan Melax's mesh reduction PDF, see http://pomax.nihongoresources.com/downloads/PolygonReduction.pdf

Namespace:  Rhino.Geometry
Assembly:  RhinoCommon (in RhinoCommon.dll)
Since: 6.0
Syntax
Copy
public int CollapseFacesByEdgeLength(
	bool bGreaterThan,
	double edgeLength
)

Parameters

bGreaterThan
Type: SystemBoolean
Determines whether edge with lengths greater than or less than edgeLength are collapsed.
edgeLength
Type: SystemDouble
Length with which to compare to edge lengths.

Return Value

Type: Int32
Number of edges (faces) that were collapsed, -1 for general failure (like bad topology or index out of range) or -2 if all of the edges would be collapsed and the resulting mesh would be invalid.
Remarks
This number may differ from the initial number of edges that meet the input criteria because the lengths of some initial edges may be altered as other edges are collapsed.
See Also