Convert Quad XY to Icosa Triangle coordinates

Inverse transformation from quad coordinates back to icosahedral triangle coordinates. Useful for projecting cell centers back to lon/lat.

Usage

hexify_quad_xy_to_icosa_tri(quad, quad_x, quad_y)

Arguments

quad

Quad number (0-11)

quad_x

Continuous X coordinate in quad space

quad_y

Continuous Y coordinate in quad space

Value

List with components:

icosa_triangle_face

Triangle face number (0-19)

icosa_triangle_x

X coordinate on triangle face

icosa_triangle_y

Y coordinate on triangle face

See also

Other coordinate conversion: hexify_cell_id_to_quad_ij(), hexify_cell_to_icosa_tri(), hexify_cell_to_lonlat(), hexify_cell_to_plane(), hexify_cell_to_quad_ij(), hexify_cell_to_quad_xy(), hexify_grid_cell_to_lonlat(), hexify_grid_to_cell(), hexify_icosa_tri_to_plane(), hexify_icosa_tri_to_quad_ij(), hexify_icosa_tri_to_quad_xy(), hexify_lonlat_to_cell(), hexify_lonlat_to_plane(), hexify_lonlat_to_quad_ij(), hexify_quad_ij_to_cell(), hexify_quad_ij_to_icosa_tri(), hexify_quad_ij_to_xy(), hexify_quad_xy_to_cell(), hexify_roundtrip_test()

Examples

if (FALSE) { # \dontrun{
# Convert quad XY back to triangle coordinates
tri <- hexify_quad_xy_to_icosa_tri(quad = 1, quad_x = 0.5, quad_y = 0.3)
print(tri)
} # }