Changes in version 0.1.0 (2026-07-21)                  

  - Preparing for CRAN release, textures is now the core mesh-generation
    package that quadmesh will import.

  - The quad header library is vendored into
    inst/include/textures/quad.h, removing the GitHub-only 'quad'
    dependency. Other packages may use it via LinkingTo: textures.

  - Behaviour change: quads are now emitted in cell order, x fastest
    (the matrix()/image() convention, and raster cell order when ydown =
    TRUE). Previously the C++ path emitted quads y fastest. Vertices are
    unchanged; only the column order of ib (and so face-value alignment)
    changes.

  - New core primitives quad_index(), quad_edges(), quad_vertex().
    quad_edges() is the unexpanded intermediate form (the grid margin
    coordinates). quad_index() transparently returns double storage for
    grids whose vertex count or index length exceeds the integer
    maximum.

  - New compact specification form quad_spec(), a plain serializable
    recipe for a generatable mesh, with quad_mesh() to materialize it as
    mesh3d. With rgl installed, as.mesh3d() also works on a quad_spec
    (delayed S3 registration).

  - rgl and scales are no longer Imports: mesh3d objects are constructed
    directly, rgl (in Suggests) is only needed for 3D display.
    set_scene() and png_plot3d() require rgl at runtime.

  - plot.mesh3d() is rewritten in base graphics (previously used grid
    and gridBase, which were not declared dependencies); its triangle
    branch indexing bug is fixed.

  - quad_texture() with an empty texture path now warns 'no texture file
    given' rather than 'texture file given does not exist'.

                        Changes in version 0.0.1                        

  - Add segs() function.

  - Convert to use headers package {quad}.

  - Convert to cpp11.

  - Now using 'main' as default branch in git.

  - Added 'extent' to quad().

                     Changes in version 0.0.0.9020                      

  - quad.h now provides matrix version of vertex table, with or without
    z-h.

  - New function png_plot3d() to directly plot from a PNG file.

  - Modify R functions to leverage C++ versions of quad vertex and quad
    index constructors.

  - Aligned to R's matrix orientation as a basis for quad creation.