Therion 6.4.0 (2026-05-07):

therion:

• added scan command to include STL 3D mesh into cave 3D model
• added point borehole
• added 'gps' as alias for 'position' team role [#711]
• added \monthname, \fullmonthname and \twodigit TeX macros
• added support for a non-breakable space (U+00A0) in map texts
• added splay and approximate shot flags to DB export
• allow any projection with point section [#699]
• new config command: scrap-sort on/off [#686]
• bugs fixed:
  • fixed nosurvey length calculation with equate [#652]
  • fixed floating point number logging
  • added point stalactites/stalagmites to the speleothems group (fixes [#683])
  • fix multi-level map shift [#687]
  • support font <size:x> for named sizes and percentages outside of MP
  • date formatting bugfix [#728]
  • map reference processing bugfix [#733]
  • documentation improvements [#647, #704, #708, #709, #715, #747, #748]

xtherion:

• removed 'Help / Calibrate bitmap' function (Therion produces standard
  geospatial PDF files starting with 6.3.0)
• bugs fixed:
  • fixed segment subtype context menu
  • fixed right-click behavior in XTherion for Tcl/Tk 9 on macOS [#735]

infrastructure and compiler:

• removed Makefiles [#703]
• enabled C++20 [#668]
• code improvements: simplified printing functions [#655];
  thscan improvements [#660]; cleanup of includes [#666, #667, #753];
  use more fmt::format [#672]; thprintf() replacement [#674, #677, #678, #679];
  removed fmt::sprintf [#680, #684, #685]; use std::numbers::pi [#696, #713,
  #750]; C++20: replaced thmatch templates with std::span [#675];
  refactored macro thexp_set_ext_fmt [#697]; remove LXDEPCHECK [#707];
  remove dependency on X11 [#706]; refactoring of thlibrarydata [#721, #725];
  thinput improvements [#722]; refactoring of thbuffer [#734]
• code reorganization: split lxMath.h [#671];
  move sources to src [#714, #717] and tests [#719];
  move TR library to extern [#720]; refactored library therion-tex [#736];
  refactored library therion-mpost [#738];
  refactored thsymbolsetlist generation [#739];
  refactored thlang generation [#749]; moved thcsdata build definition [#752]
• enabled Loch compilation using MSVC [#740]
• fix new clang tidy warnings [#659]; enabled pedantic warnings [#724];
  silence Clang 22 warning [#742]
• CMake: option ENABLE_WERROR [#661]; removed toolchain files [#670];
  don't define _GNU_SOURCE [#701]; simplify -Werror [#702];
  option to disable unit tests [#705];
  fixed Loch help archive creation on macOS (libarchive xattr issue) [#732];
  localization of loch on macOS [#489]
• fix MSYS2 pipelines [#664]
• Github Actions: allow c:/ drive along with d:/; macOS updates [#695, #743];
  CMake test output on failure; fix workflow permissions; update GHA scripts
• support compilation on Android (in termux)
• Proj 9.8.0 included to the testing script