History - mkraska/meclib GitHub Wiki

Uncommitted

2026 10 07

  • fb_fix13_names(): removed a dead check on an unassigned variable (no H/V/x/y naming check for fix13, which has exactly one reaction force); wording of the "single letter" message aligned with fb_fix1_name()
  • fb_unit(): added the missing   to four English messages (too large, too small, sign, mantissa)
  • fb_coeffs(): removed a double gap between the variable name and the coefficient feedback; new wiki page fb_coeffs()
  • fb_q(): relative magnitude check now uses the absolute relative error, so too large values are detected as well
  • fb_fix1(), fb_fix12(), fb_fix123(), fb_fix13(): removed a double space in the "not deactivated" message
  • Offline regression tests for the Maxima feedback functions (Maxima/tests/), see Maxima/tests/README.md

2026 10 06

  • Internationalization ([lang](/mkraska/meclib/wiki/lang)) completed for the remaining Group-2 feedback functions (fb_fix13, fb_fix13_names, fb_force_hvxy)
  • Restructured all internationalized free-body-diagram feedback functions (fb_name, fb_force, fb_force_hvxy, fb_fix1, fb_fix12, fb_fix12_name, fb_fix123, fb_fix123_name, fb_fix13, fb_fix13_names, fb_unidir, fb_contact) to a "split-parts" architecture: every language-specific text fragment is a named local variable declared once at block entry; dynamic values are plain-concatenated at the point of use instead of being rebuilt per call
  • Settled convention: developer-facing diagnostic messages (question-authoring errors, not student mistakes) stay English, inline, unhoisted
  • Fixed inconsistency in fb_contact()'s unresolved-targetRef message (was German/unwrapped, now English, matching the above)

Dev Branch

2026 10 05

  • fb_force(): signature extended for a unit-tagged toldist (grid-scaled distance tolerance)
  • fb_name(): made more robust — new optional [opt] parameter to silence the "no match" message; name comparison now normalizes CAS symbols vs. strings before comparing
  • fb_contact(): add a compression/tension sign check (a contact can only push, never pull)

2026 10 04

  • fb_force(): added a line-of-action distance tolerance (plain number or unit-tagged [tol,"unit"]); multi-name LaTeX rendering and castext() formatting fixes
  • Add fb_force(): general-purpose check for a single active force not tied to a support/contact index (direction + line-of-action-through-a-point check)

2026 10 03

  • fb_contact() / fb_resolve_ref(): targetRef may now be a list, so one contact can cut away several environment objects at once (e.g. two wall segments meeting at a corner)

2026 09 30

  • Adjust the formatting of result strings in fb_system() and fb_reactions()
  • Fix the error handling in fb_unit()
  • Avoid unintended units activation in fb_unit()
  • Fixed problem in fb_coeffs() and make it bilingual
  • Extend fb_dir() and add fb_reaction_name()
  • Adjust the signature of fb_varsOK() to match fb_vars()

Main Branch

2026 09 29

  • Adjust a feedback string in fb_contact()

2026 09 29

  • Add active option to "dir" object for choosing a coordinate direction; new sum_dir(), contributor(), and Feedback for "dir" (fb_dir())
  • fb_coeffs()/fb_vars() gained a coefficient tolerance parameter, filtering out numerically negligible terms before checking for missing/spurious variables
  • New deg2rad() in fb_value.mac for grading answers that use the deg unit symbolically
  • Feedback for "contact": dropped the quotes around the referenced object's name in the "not deactivated" message

2026 09 26

  • Add "contact" object for free body diagrams

2026 09 22

  • Fix #63, Infobox not displayed for points with children, due to a temporary regression in JSXGraph 1.12.1 and 1.12.2

2026 04 09

  • Fix #57, was due to buggy version comparison

2026 04 08

2026 03 07

  • Make multilingual string constants in feedback functions local (for fb_value.mac)
  • Add constants for multilingual syntax hints Multilingual questions

2025 05 13

2025 03 30

  • Fix grid spacing for JSXGraph 1.10.1

2025 03 28

  • Fix the decimal separator in the feedback provided by fb_unit

2025 03 04

  • Bilingual version of fb_unit with updated unit test question

2025 03 02

  • Bilingual version of fb_vars with updated interactive and unit test questions

2025 02 18

  • Handle missing decsep attribute if fbd_names object is available (as in ONYX)

2025 02 17

  • Implemented #51 (decimal separator synchronized with STACK)
  • Adjust placement of version info

2024 11 26

  • cleanupName() in meclib.js modified to avoid spurious spaces

2024 11 25

  • fb_reactions() corrected
  • sums_xyM() created

2024 11 24

2024 11 21

2024 11 16

  • Re-implementation of "rope" (only in meclib.js, not in imeclib.js)

2024 10 24

  • Fix "polygon" (only in meclib.js, not in imeclib.js)

2024 10 14

  • Adjust color and layer of axes defined by "grid"

2024 09 24

  • Takeover of dynamic objects
  • Fix default of drawZero option for grid

2024 04 02

  • Fix serialization of "circle" (method data())

2024 03 08

  • Fix of #47, detection of resultants of "q"
  • Fix tick label digits in "grid"

2024 03 04

2024 03 02

2024 02 23

2024 02 21

  • Enforce snaptogrid of "force" objects when dragging the vector

2024 02 19

  • Fix #46, update of input fields by "force" object

2024 02 17

  • Modify behaviour of fb_vars (nonzero numeric tans values now aren't ignored).
  • Add unit test for fb_vars.

2023 12 05

  • Implement #32 (avoid zero length of force vectors)

2023 12 02

2023 10 06

  • Enforce grid distance of one axis unit (sometimes sub-gridlines were drawn)

2023 08 03

  • Switch off automatic point names (relevant for script-generated points)

2023 07 08

  • Auto-correction of input in "momentGen" and "forceGen" to avoid complaints by STACK about forbidden names (with more then one character before the first underscore).

2023 06 28

2023 06 09

  • Fix issue #33 in "grid" (formatting of axes tick labels in JSXGraph 1.5)

2023 05 12

2023 05 08

2023 05 04

  • Adjust container sizing logics in "grid" to upcoming new STACK version
  • Add "Change" event in the update() function for notification of changed input in new STACK version

2023 04 30

  • Change layer of "grid" to 8. This puts axes and grid to the foreground. Grid should be in the background. See issue #37

2023 04 29

  • Extend "polygon", can have multiple holes now.
  • Color of "line" objects can be specified via "name" argument
  • Color of "node" objects can be specified via optional argument

2023 04 16

2023 04 09

2023 04 08

  • Change the test concept for fb_unit. Test is split into an interactive one (quiz mode adaptive) and a non-interactive one (quiz mode direct). This was enforced by the non-interactive test suite failing by timeout in adaptive quiz mode, which is better for interactive tests.
  • Add interactive test question for fb_vars.
  • Add unit test question for Feedback for unidirectional supports.

2023 04 07

2023 02 07

  • Add tests T03a and T03b to unit test QA 01 for fb_unit. They adress cases with zero tolerance.

2023 01 23

2023 01 21

2023 01 17

2023 01 16

  • Fix fb_unit feedback for correct results

2023 01 13

  • Deactivate snaptopoint for inactive forces to prevent unintended misplacement.

2022 12 16

  • Create function fb_bar_name and corresponding unit test (QA 02 in the Demo Moodle Course)
  • Improve function toTEX() in meclib. Better display of multi-character indices.

2022 12 11

  • Improvements of unitless value handling in fb_unit

2022 12 09

  • Add diagnostic message to init() function (for unknown object specifications)

2022 12 02

2022 11 25

2022 11 23

  • "grid" Support for inverted axes directions
  • Avoid empty names in names input field by converting empty names to NONAME.

2022 11 05

  • Version info string modified. Now JSXGraph version and Meclib version are displayed.

2022 10 30

  • "spline" with option pure has no grid snap of the control points. This ensures that the control points are set as specified.

2022 10 16

  • Refactoring of fb_unit More reliable handling of zero values.
  • Test question for fb_unit.

2022 10 02

  • Add check for units mismatch to fb_unit. The default feedback of the answer test can be switched off.

2022 10 01

  • Introduction of boolean versions of the feedback functions for values (fb_numberOK(), fb_varsOK(), fb_unitOK()), see e.g. fb_vars
  • Implementation of fb_dim, dimensional check of expressions with physical quantities.
  • Handle student's answer = 0 in fb_number and fb_unit.

2022 09 22

  • Consistent naming and signature of feedback functions for free body diagrams to fb_xxx_name(obj, names, index)

2022 08 15

  • Adjustment of "circle2p" to newer JSXGraph (modified signature of intersection object)

2022 08 09

  • "line2p" got an optional perpendicular line (thus enabling of setting the normal to a line)

2022 08 02

2022 08 02

  • Move source of feedback functions for free body diagrams from the wiki to the source file
  • Successful test of include mechanism in question variables and question text (new in STACK 4.4)

2022 07 31

  • Adjustment to JSXGraph 1.4.5 (there were problems with text input fields)

2022 07 22

  • Add state option "silent" to "force", suppresses the infobox at the point
  • Make phi argument of "q" optional (resolves #16)

2022 07 19

  • Improvement of the precision feedback in fb_unit and fb_number. The percent deviation is given with just one significant figure. "Deviation is at least xxx%".

2022 05 13

2022 05 11

2022 05 09

  • Introduction of the constant loadColor
  • Enforce consistent appearance of "force", "moment" and "q" objects
  • Change was required due to modified default colors in JSXGraph 1.4.3

2022 04 25

2021 06 15

  • Initial commit, project started