Quad Mesh Primitives and Texture Mapping for Grids // Generate quad mesh primitives from the compact specification of a regular grid, its dimension and extent. Provides fast generation of mesh indexes and vertices, an unexpanded intermediate form (the grid edge coordinates), and a compact serializable specification for meshes that are generated on demand. Meshes are 'mesh3d' objects as used by the 'rgl' package, constructed without requiring any graphics engine, with support for texture mapping (Heckbert (1986) doi:10.1109/MCG.1986.276672) where an image is draped over a mesh whose density is independent of the image resolution. A C++ header library is installed so that other packages may generate mesh components via 'LinkingTo'.