API Reference › core-geometry› Serialization › IModelJson › IModelJson.IndexedMeshProps

IModelJson.IndexedMeshProps Interface

Interface for an indexed mesh.

  • IMPORTANT: All indices are one-based.
  • i.e. vertex index given as 11 appears at index 10 in the data array.
  • This is to allow a negated index to mean "don't draw the following edge"
  • Although negative indices are not allowed for normalIndex, colorIndex, or paramIndex, the "one based" style is used for them so that all indices within the indexedMesh json object are handled similarly.
  • In all index arrays, a ZERO indicates "end of facet".

Properties

Name Type Description
auxData IModelJson.AuxDataProps | undefined Optional analytical data at the vertices of the mesh  
color [number] | undefined 32 bit color values  
colorIndex [number] | undefined ONE BASED ZERO TERMINATED array of color indices.  
expectedClosure number | undefined Indicates if mesh closure is unknown (0 | undefined), open sheet (1), or closed solid (2).  
normal [XYZProps] | undefined surface normals  
normalIndex [number] | undefined ONE BASED ZERO TERMINATED array of normal indices.  
numPerFace number | undefined Optional fixed block size for indices.  
param [XYProps] | undefined texture space (uv parameter) coordinates  
paramIndex [number] | undefined ONE BASED ZERO TERMINATED array of param indices.  
point [XYZProps] vertex coordinates  
pointIndex [number] SIGNED ONE BASED ZERO TERMINATED array of point indices.  
tags IModelJson.TaggedNumericDataProps | undefined Optional array of tagged geometry (such as to request subdivision surface)  
twoSided boolean | undefined Optional flag indicating if mesh display must assume both sides are visible.  

Defined in

Last Updated: 17 December, 2024