Create a Regular Test Grid of Coordinates

Generates a 2D grid of equally spaced points, useful for testing fisheye transformations and other spatial warping functions.

Usage

create_test_grid(range = c(-1, 1), spacing = 0.1)

Arguments

range

Numeric vector of length 2 giving the x and y limits of the grid (default = c(-1, 1)).

spacing

Numeric. Distance between adjacent grid points along each axis (default = 0.1).

Value

A numeric matrix with two columns (x, y) containing the coordinates of the grid points.

See also

plot_fisheye_fgc(), fisheye_fgc()

Examples

# Create a grid from -1 to 1 with spacing 0.25
grid <- create_test_grid(range = c(-1, 1), spacing = 0.25)
head(grid)
#>          x  y
#> [1,] -1.00 -1
#> [2,] -0.75 -1
#> [3,] -0.50 -1
#> [4,] -0.25 -1
#> [5,]  0.00 -1
#> [6,]  0.25 -1