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Edge glyph prototypes

Source: R/gspace-glyph-constructor.R, R/gspace-glyph-collection.R
glyph_collection.Rd

A collection of prototypes for the symbols drawn at an edge end (arrows, bars, empty ends, ...). Each is a static, self-contained gs_glyph object built with glyph_proto: a fixed shape in a canonical local frame (reference point at the origin, +x outward along the edge, +y to its left, unit size), together with the arrowType token(s) that select it. Glyphs carry no positioning, size, or colour; those are edge attributes applied at render time (see arrow_size in geom_edgespace).

Usage

GlyphArrow

GlyphBar

GlyphNone

GlyphTriangle1

GlyphTriangle2

GlyphHarpoon1

GlyphHarpoon2

GlyphDiamond1

GlyphDiamond2

GlyphChevron1

GlyphChevron2

GlyphArrowBar1

GlyphArrowBar2

GlyphDoubleArrow1

GlyphDoubleArrow2

GlyphBarredArrow1

GlyphBarredArrow2

GlyphBlock1

GlyphBlock2

GlyphCircle1

GlyphCircle2

GlyphSquare1

GlyphSquare2

GlyphStar1

GlyphStar2

GlyphCross1

GlyphCross2

GlyphNotch1

GlyphNotch2

GlyphDoubleBar1

GlyphDoubleBar2

GlyphReverseArrow1

GlyphReverseArrow2

Format

Objects of class gs_glyph.

Details

The basic glyphs (group "basic": arrow, bar, and no glyph) follow common conventions for positive and negative effects. The arrow and bar are also the primitives of the vee-like and tee-like extended glyphs, grouped by the silhouette they form with the edge: "vee-like" glyphs end in a point, and "tee-like" glyphs end in a wider shape. The extended glyphs are numbered within their group (e.g. ">01", "|03"). Most shapes come in pairs of consecutive numbers: a filled form (odd) followed by its open form (even). The numbered glyphs carry no predefined meaning; explain them with a legend (see glyph_legend).

These prototypes define RGraphSpace's built-in glyph vocabulary. They are discovered automatically at package load: any gs_glyph object in the package namespace becomes available through its declared token(s). Use glyph_list to see the available tokens and glyph_proto for how a new glyph is added.

Adding a glyph

New glyphs are contributed by adding an exported Glyph* object to the package's gspace-glyph-collection.R source file, which documents the full recipe. There is no runtime registration.

See also

glyph_proto, glyph_list, geom_edgespace

Examples

GlyphArrow
#> <glyph 'arrow': 3 points, draw = polyline, token = >>
plot(GlyphArrow)

plot(GlyphArrow, GlyphTriangle1, GlyphDiamond1)