Skip to contents

Visualize Focus–Glue–Context (FGC) Fisheye Transformation

plot_fisheye_fgc.Rd

Creates a side-by-side scatterplot comparing the original and transformed coordinates of a dataset under the Focus–Glue–Context fisheye mapping. Points are colored according to whether they fall in the focus, glue, or context zones, and boundary circles are drawn for clarity.

Usage

plot_fisheye_fgc(
  original_coords,
  transformed_coords,
  cx = 0,
  cy = 0,
  r_in = 0.34,
  r_out = 0.5
)

Arguments

original_coords

A matrix or data frame with at least two columns representing the original (x, y) coordinates.

transformed_coords

A matrix or data frame with the transformed (x, y) coordinates (same number of rows as original_coords).

cx, cy

Numeric. The x and y coordinates of the fisheye center (default = 0, 0).

r_in

Numeric. Radius of the inner focus boundary (default = 0.34).

r_out

Numeric. Radius of the outer glue boundary (default = 0.5).

Value

A ggplot2 object showing original vs transformed coordinates, colored by zone, with boundary circles overlaid.

See also

create_test_grid(), fisheye_fgc()

Examples

library(ggplot2)

# Generate test grid and apply fisheye
grid <- create_test_grid(range = c(-1, 1), spacing = 0.1)
warped <- fisheye_fgc(grid, r_in = 0.4, r_out = 0.7)

# Visualize transformation
plot_fisheye_fgc(grid, warped, r_in = 0.4, r_out = 0.7)