textures 0.1.0

• 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’.

textures 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().

textures 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.