DrawnVertices

Which node and which element each drawn vertex of a passenger item shows (field-presentation §FVG-1).

In the namespace construct::asset. Declared in src/libs/libconstruct/construct/asset/RenderStream.hpp.

Detailed description

A tet volume draws its boundary faces, a mesh item its 3-node elements, three vertices per triangle with no index. A curved Tet10 face draws as four triangles through its midside nodes. A render stream reads a node field at `nodes[v]` and an element field at `elements[v]`.

A cut cap's vertex lies on an edge of its element (field-presentation §FVG-11): it reads a node field between `nodes[v]` and `nodesB[v]`, at the weight `weightsB[v]` of the second node. Each stream interpolates per component, which is exact for a field that is linear on the edge. Both lists are empty for vertices at nodes.