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This vignette covers statistical summaries, curve/contour layers,
filled regions, raster grids, annotations, and fixed-scale facets.
Evaluation is disabled during CRAN, package checks, and CI unless
explicitly enabled with GGWEBGL_EVAL_COVERAGE_VIGNETTE=true
or NOT_CRAN=true. Live WebGL widgets are additionally
disabled unless GGWEBGL_EVAL_LIVE_WIDGETS=true is set; rich
local or pkgdown builds should set both
GGWEBGL_EVAL_COVERAGE_VIGNETTE=true and
GGWEBGL_EVAL_LIVE_WIDGETS=true.
Example chunks are shown but not evaluated in this build. Set
GGWEBGL_EVAL_COVERAGE_VIGNETTE=trueorNOT_CRAN=trueto evaluate them during a local non-CI render.
Frequency polygons, density curves, two-dimensional density contours,
and regular contour lines all serialize to line/path primitives. The
statistical work remains with ggplot2.
geom_density2d_webgl() uses ggplot2’s
two-dimensional density statistic, which requires MASS at
render time. The chunk is skipped when that optional runtime dependency
is unavailable.
volcano_df <- as.data.frame(as.table(volcano))
names(volcano_df) <- c("x", "y", "z")
volcano_df$x <- as.numeric(volcano_df$x)
volcano_df$y <- as.numeric(volcano_df$y)
p <- ggplot(volcano_df, aes(x, y, z = z)) +
geom_contour_webgl(bins = 8) +
labs(title = "Gridded contour lines")
ggplot_webgl(p, height = 420)Range and summary geoms combine segment, point, and rectangle primitives.
summary_df <- data.frame(
group = factor(c("a", "b", "c")),
y = c(4.1, 5.3, 6.0),
ymin = c(3.6, 4.7, 5.4),
ymax = c(4.8, 6.1, 6.8)
)
p <- ggplot(summary_df, aes(group, y, ymin = ymin, ymax = ymax)) +
geom_linerange_webgl(linewidth = 1.2) +
geom_pointrange_webgl(colour = "#2563eb") +
labs(title = "Linerange and pointrange")
ggplot_webgl(p, height = 420)Ribbon, area, and simple polygon layers are filled-region APIs. They are useful for compact displays, but complex polygon topology such as holes or self-intersections should be treated as outside the current core contract.
band <- data.frame(
x = seq(0, 2 * pi, length.out = 80)
)
band$y <- sin(band$x)
band$ymin <- band$y - 0.15
band$ymax <- band$y + 0.15
p <- ggplot(band, aes(x, ymin = ymin, ymax = ymax)) +
geom_ribbon_webgl(fill = "#93c5fd", alpha = 0.6) +
geom_line_webgl(aes(y = y), colour = "#1d4ed8") +
labs(title = "Ribbon band")
ggplot_webgl(p, height = 420)Raster layers are intended for regular cell displays. Text and label layers are overlay metadata, not full WebGL glyph rendering.
labels <- data.frame(
x = c(2, 6),
y = c(2, 5),
label = c("low", "high")
)
p <- ggplot(small_raster, aes(x, y, fill = value)) +
geom_tile_webgl(alpha = 0.55) +
geom_text_webgl(data = labels, aes(x = x, y = y, label = label), inherit.aes = FALSE) +
geom_rug_webgl(colour = "#334155") +
labs(title = "Text and rug overlays")
ggplot_webgl(p, height = 420)Fixed-scale facets are supported across the primitive families. Free-scale facets are serialized conservatively as metadata unless panel-local scaling is available for the layer combination being rendered.
p <- ggplot(mtcars, aes(wt, mpg, colour = factor(cyl))) +
geom_point_webgl() +
facet_wrap(~am) +
labs(title = "Fixed-scale facets")
ggplot_webgl(p, height = 420)Unsupported geoms remain visible to the extraction layer as
unsupported metadata rather than being silently claimed as WebGL
primitives. When a plot needs exact ggplot2 parity for an
unsupported layer, keep that layer in a static ggplot or replace it with
one of the supported WebGL primitives above.
These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.