qualpalr 0.4.4

Minor changes

• The dependency on RcppParallel has been dropped. As a result, the
  argument n_threads is now deprecated (and has no effect).

qualpalr 0.4.3

Minor changes

• qualpal() gains an argument, n_threads, for specifying the number
  of threads to use when computing the distance matrix between colors.
• C++ functions call namespaces explicitly using ::.
• Documentation for hue and saturation in qualpal() has been fixed.
  (Closes #2, thanks @jflycn).

qualpalr 0.4.2

Major changes

• Palettes are no longer generated randomly. qualpalr previuosly started
  with a random sample of colors before running the optimization scheme but now
  instead picks a starting set of linearly spaced colors.

Minor changes

• C++ functions are registered via Rcpp.

Bug fixes

• autopal() erroneously required colorspace to be a string.

qualpalr 0.4.1

Bug fixes

• Fixed autopal() which was broken since the minimum color difference
  returned was always 0 due to a bug in qualpal().

Minor changes

• Now registers compiled functions.

qualpalr 0.4.0

Major changes

• autopal() is a new function that tweaks the amount of color vision
  deficiency adapation to match a target color difference.
• qualpal() argument colorspace now also accepts a matrix or
  data.frame of RGB colors.

Minor changes

• qualpal() sorts palettes in order of increasing color distinctness.
• qualpal() argument colorblind has been made defunct.
• Documentation for qualpal() has been improved.
• Colors are now generated with randtoolbox::torus() instead of
  randtoolbox::sobol().

qualpalr 0.3.1

Bug fixes

• Dropped a C++ header that caused the package build to fail
  on some platforms.
• Fixed issues with unitialized variables in the internal farthest points
  optimizer.

qualpalr 0.3.0

New features

• Improved algorithm for finding distinct colors. (For details
  see this.)
• Revamped the color deficiency handling to include almost all cases of color
  deficiency using the methods described in
  Machado 2010,
  now including tritanopia as well as anomalous trichromacies (deuteranomaly,
  tritanomaly, and protanomaly). This is controlled via the cvd_severity
  argument to qualpal() that allows the user to set the severity of color
  deficiency to adapt to: 0 for normal vision and 1 for dichromatic vision
  (protanopia, deuteranopia, or tritanopia).

Minor improvements

• Distance and color picking algorithms have been rewritten in C++ using Rcpp,
  RcppParallel, and RcppArmadillo.
• Phased out the ... argument to qualpal.
• Lightness range of the predefined rainbow palette increased to [0, 1].
• Changed argument name of colorblind to cvd (for color vision deficiency)
  since the function now adapts to less severe versions of color deficiency. Using
  colorblind is deprecated and will throw a warning.

Bug fixes

• Fixed typos and invalid links in the Introduction to qualpalr vignette.

qualpalr 0.2.1

New features

• qualpalr can now adapt to color deficiencies by transforming the given color
  subspace to simulate protanopia or deuteranopia and then picks colors. This
  has the side-effect of decreasing the distinctness of color palettes when
  colorblind is used, but is more consistent with user input.
• Redesigned the method by which qualpal picks colors. Now initializes a point
  cloud of colors, projects it to DIN99d space, and picks points greedily.
• The introduction to qualpalr vignette has been expanded with a thorough
  description of how qualpalr picks colors.

Bug fixes and minor improvements

• Simulations for tritanopia were dropped since there is no reliable source
  to explain how sRGB ranges should be converted (as there is for deuteranopia
  and protanopia in Vienot et al 1999).
• Added tests using data from Vienot et al 1999 to check that color blind
  simulations work properly.
• Fixed a sampling bug wherein the square root of saturation was taken after
  scaling to the provided range, which generated different ranges than intended.
• Switched to the sobol quasi-random sequence instead of torus.
• Moved from using grDevices::convertColor to formulas from
  Bruce Lindbloom for color conversions,
  since the former function inaccurately converts colors.
• Deprecated ... in qualpal since the function no longer uses an optimizer.