Changes in version 0.3.7 (2024-11-21)                  

  - Fix: Updated progressive packing vignette example to use
    ggiraph::girafe() function and fix CRAN warning (thanks to David
    Gohel).

  - Use the checkmate package to check arguments to functions.

                 Changes in version 0.3.6 (2023-09-08)                  

  - Fix: Minor change to conform to CRAN package doc conventions.

                 Changes in version 0.3.5 (2022-11-22)                  

  - Fix: Updated ggiraph dependency to version 0.8.4 to fix error when
    building one of the vignettes.

                 Changes in version 0.3.4 (2020-12-12)                  

  - Fix: Minor updates to comply with R extensions convention for using
    packages listed under 'Suggests'.

                 Changes in version 0.3.3 (2018-09-18)                  

  - Fix: Minor updates to comply with the planned introduction of
    STRICT_R_HEADERS in Rcpp.

                 Changes in version 0.3.2 (2018-04-28)                  

  - Minor change in pads_circle_pack.cpp (graph-based circle packing) to
    address a CRAN warning.

                 Changes in version 0.3.1 (2018-01-09)                  

  - Fixed a problem where function circleProgressiveLayout sometimes
    returned a layout with overlapping circles. Thanks to Jeffrey Lewis
    for reporting and Peter Menzel for code changes.

                 Changes in version 0.3.0 (2017-11-24)                  

  - Feature: Added circleRemoveOverlaps which takes a set of circles and
    identifies a subset of non-overlapping circles. The function can
    also be set to allow some degree of overlap or require space between
    circles. The function uses either a fast heuristic algorithm
    (several choices) or linear programming (requires package lpSolve).

  - Fix: Replaced use of sprintf with snprintf in pads_circle_pack.cpp
    (graph-based circle packing) to address CRAN warning.

                 Changes in version 0.2.0 (2017-04-06)                  

  - Feature: Added circleProgressiveLayout which deterministically
    places each circle in turn such that it is externally tangent to two
    previously placed circles while avoiding overlaps.

  - Feature: Replaced circleLayout with a new function
    circleRepelLayout. The original function is retained for backwards
    compatibility but is deprecated and will be removed in a future
    release. Important note: the new function accepts circles sizes as
    either areas or radii. The default is area, unlike circleLayout
    which assumed sizes were radii. The type of size value can be
    specified using the sizetype argument.

  - Feature: Replaced circlePlotData with a new function
    circleLayoutVertices. The original function is retained for
    backwards compatibility but is deprecated and will be removed in a
    future release. The new function has a sizetype argument to specify
    whether the input circle sizes are areas or radii. By default,
    radius is assumed as this matches the output of the layout functions
    but I realize it's a bit confusing.

  - Internal: Removed gridExtra from suggested packages.

  - Internal: Added ggiraph (used for vignette).

  - Docs: Re-wrote the introductory vignette and added a new vignette
    for circleProgressiveLayout.

  - Docs: Edited function docs and examples.

  - Internal: Added file for native routine registration as now required
    by CRAN.