API Reference > geometry-core > Polyface > PolyfaceVisitor PolyfaceVisitor Interface A PolyfaceVisitor manages data while walking through facets. The polyface visitor holds data for one facet at a time. The caller can request the position in the addressed facets as a "readIndex." The readIndex value (as a number) is not promised to be sequential. (I.e. it might be a simple facet count or might be Extends PolyfaceData Implemented by IndexedPolyfaceVisitor Methods Name Description clearArrays(): void clear the contents of all arrays. clientAuxIndex(i: number): number Return the aux data index of vertex i within the currently loaded facet clientColorIndex(i: number): number Return the color index of vertex i within the currently loaded facet clientNormalIndex(i: number): number Return the normal index of vertex i within the currently loaded facet clientParamIndex(i: number): number Return the param index of vertex i within the currently loaded facet clientPointIndex(i: number): number Return the point index of vertex i within the currently loaded facet clientPolyface(): undefined | Polyface return the client polyface currentReadIndex(): number Return the readIndex of the currently loaded facet moveToNextFacet(): boolean Load data for the next facet. moveToReadIndex(index: number): boolean Load data for the facet with given index. pushDataFrom(other: PolyfaceVisitor, index: number): void transfer data from a specified index of the other visitor as new data in this visitor. pushInterpolatedDataFrom(other: PolyfaceVisitor, index0: number, fraction: number, index1: number): void transfer interpolated data from the other visitor. reset(): void Reset to initial state for reading all facets sequentially with moveToNextFacet setNumWrap(numWrap: number): void Set the number of vertices to replicate in visitor arrays. Inherited methods Name Inherited from Description clone(): PolyfaceData PolyfaceData Return a depp clone. compress(): void PolyfaceData * Search for duplication of coordinates within points, normals, and params. copyNormalTo(i: number, dest: Vector3d): void PolyfaceData Copy the contents (not pointer) of normal[i] into dest. copyParamTo(i: number, dest: Point2d): void PolyfaceData Copy the contents (not pointer) of param[i] into dest. copyPointTo(i: number, dest: Point3d): void PolyfaceData Copy the contents (not pointer) of point[i] into dest. gatherIndexedData(other: PolyfaceData, index0: number, index1: number, numWrap: number): void PolyfaceData * Copy data from other to this. getColor(i: number): number PolyfaceData return indexed color getEdgeVisible(i: number): boolean PolyfaceData return indexed visibility getNormal(i: number): undefined | Vector3d PolyfaceData return indexed normal. getParam(i: number): undefined | Point2d PolyfaceData return indexed param. getPoint(i: number, out?: Point3d): undefined | Point3d PolyfaceData return indexed point. isAlmostEqual(other: PolyfaceData): boolean PolyfaceData Test for equal indices and nearly equal coordinates isAlmostEqualParamIndexUV(index: number, u: number, v: number): boolean PolyfaceData test if normal at a specified index matches uv range(result?: Range3d, transform?: Transform): Range3d PolyfaceData Return the range of the point array (optionally transformed) resizeAllDataArrays(length: number): void PolyfaceData Resize all data arrays to specified length reverseIndices(facetStartIndex?: number[]): void PolyfaceData reverse indices facet-by-facet, with the given facetStartIndex array delimiting faces. reverseIndicesSingleFacet(facetId: number, facetStartIndex: number[]): void PolyfaceData reverse indices facet-by-facet, with the given facetStartIndex array delimiting faces. reverseNormals(): void PolyfaceData Scale all the normals by -1 setTaggedNumericData(data: undefined | TaggedNumericData): void PolyfaceData set the taggedNumericData member trimAllIndexArrays(length: number): void PolyfaceData Trim all index arrays to stated length. tryTransformInPlace(transform: Transform): boolean PolyfaceData Apply transform to point and normal arrays and to auxData. Inherited properties Name Type Inherited from Description auxData undefined | PolyfaceAuxData PolyfaceData Auxiliary data color undefined | number[] PolyfaceData Color values. colorIndex undefined | number[] PolyfaceData Indices of colors at facet vertices. edgeVisible boolean[] PolyfaceData booleans indicating visibility of corresponding edges face FacetFaceData[] PolyfaceData Face data will remain empty until a face is specified. normal undefined | GrowableXYZArray PolyfaceData Coordinates of normal vectors, packed as numbers in a contiguous array normalIndex undefined | number[] PolyfaceData indices of normals at facet vertices. param undefined | GrowableXYArray PolyfaceData Coordinates of uv parameters, packed as numbers in a contiguous array. paramIndex undefined | number[] PolyfaceData Indics of params at facet vertices. point GrowableXYZArray PolyfaceData Coordinate data for points in the facets, packed as numbers in a contiguous array. pointIndex number[] PolyfaceData Indices of points at facet vertices. taggedNumericData undefined | TaggedNumericData PolyfaceData Tagged geometry data colorCount Accessor ReadOnly number PolyfaceData Get the color count expectedClosure Accessor number PolyfaceData boolean tag indicating if the facets are viewable from the back faceCount Accessor ReadOnly number PolyfaceData Get the number of faces.* Note that a "face" is not a facet.* A "face" is a subset of facets grouped for application purposes. indexCount Accessor ReadOnly number PolyfaceData Get the index count. Note that there is one count, and all index arrays (point, normal, param, color) must match normalCount Accessor ReadOnly number PolyfaceData Get the normal count paramCount Accessor ReadOnly number PolyfaceData Get the param count pointCount Accessor ReadOnly number PolyfaceData Get the point count requireNormals Accessor ReadOnly boolean PolyfaceData Ask if normals are required in this mesh. twoSided Accessor boolean PolyfaceData boolean tag indicating if the facets are viewable from the back Defined in polyface/Polyface.ts Line 560 Last Updated: 11 June, 2024