internal rgl functions
rgl.bool(x)
rgl.numeric(x)
rgl.range(x, low, high)
rgl.vertex(x, y = NULL, z = NULL)
rgl.nvertex(vertex)
rgl.color(color)
rgl.mcolor(colors)
rgl.clamp(value, low, high)
rgl.attr(vattr, nvertex)
rgl.enum(name, ..., multi = FALSE)
rgl.enum.gl2ps(postscripttype)
rgl.enum.nodetype(type)
rgl.enum.pixfmt(fmt)
rgl.enum.polymode(mode)
rgl.enum.textype(textype)
rgl.enum.fogtype(fogtype)
rgl.enum.primtype(primtype)
rgl.enum.halign(halign)
rgl.enum.texmagfilter(magfiltertype)
rgl.enum.texminfilter(minfiltertype)
rgl.selectstate()
rgl.setselectstate(state)
edgemap(size)
edgeindex(from, to, size, row, col)These are not to be called by the user.