Michael Sumner

We don't have sfc, sfg methods or the sp ones (or not many). Belongs [here with plot3d refactor](https://github.com/hypertidy/anglr/issues/98) but I doubt I'll do it before release

Could look at a PATH/PATH0 and detect if every path has four vertices (and better, 5 references) and allow a QUAD interpretation. So, `spex::polygonize` and `sf::st_make_grid` outputs are candidates, but...

Two modes: * all the tiles are triangles (`$x` is length 3) * not all triangles, create as PATH0 and then DEL0

A helper function to go to mesh3d, with basic sanity checks - to avoid decomposing the GC we could do it efficiently

scatter dem

1

This is fun, mesh a set of points in xy and plot in rgl or as 2D, options: - control max area `a`, and othe rproperties of `RTriangle::triangulate` eg. `D`...

allow texture map of a raw array

2

We could default to [0,1, 0, 1] but more generally the underlying mapping functions should accept an array, raster-palette, or raster-RGB (and allow set xmin,xmax,ymin,ymax) - see FIXME in texture_mapping

de-normalization of DEL vertices for Z

3

Everything is filtered out as being a hole, why? What about sc? ```R library(sf) f

generic TODO / explore list

11

Hawaii example ```R library(rangl) library(raster) library(marmap) ## has topo data data(hawaii) library(rgeos) haw

https://github.com/hypertidy/silicate/issues/77

lazy QUAD

1

I'd lost sight of how enormous this is, unnecessarily - the size comes from having structures for quads to belong to objects, and vertices to quads - but arguably none...