WIP. Add stereonet module for plotting structural geology stereonets (Schmidt/Wulff) - #9178
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Esteban82 wants to merge 17 commits into
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WIP. Add stereonet module for plotting structural geology stereonets (Schmidt/Wulff)#9178Esteban82 wants to merge 17 commits into
Esteban82 wants to merge 17 commits into
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Review fixes on the stereonet module: - Fix a segfault: a bare -W (no pen argument) together with -Tl left W.string NULL while W.active was already true, so aliasing the pen onto -L called strdup(NULL). - Reject dips/plunges outside 0-90 and rakes outside 0-180. Such values projected onto the far hemisphere, where they are clipped away, so the module quietly produced a figure with missing data instead of an error. - Accept a negative rake as the usual shorthand for a rake measured from the opposite end of the strike, folding it into the 0-180 range (-25 is read as 155), matching the convention used by mplstereonet. The docs previously claimed negatives were rejected, which was never enforced. - Restore test/geology/minimal.sh as a classic-mode test producing $ps so the test harness can compare it, and drop the minimal.png/minimal.txt artifacts that were committed by accident.
New modules must add themselves to four separate hardcoded name lists in gmt_modern.c, or their modern name silently misbehaves in ways that only show up once you specifically go looking (this is not mentioned in devdocs/custom_supplements.rst): - gmt_current_name(): without this, every GMT_Report message (errors, warnings, info) prints the classic name "psstereonet" even when the user typed "stereonet" and is in modern mode. - gmtlib_get_active_name(): same classic->modern translation, used by a different set of callers. - gmtlib_is_modern_name(): without this, "gmt stereonet -^" (or any bare invocation outside a session, e.g. querying usage) fails outright with "Shared GMT module not found: stereonet", because the modern-mode leniency that lets a bare modern name grab usage/purpose text before a session exists never triggers. Found by testing "gmt stereonet ..." against the exact same scenarios for core module ternary and supplement modules polar/coupe (same pattern, already correctly registered) and diffing the behavior.
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Opening this as a draft/WIP specifically to get feedback before going further. @rhum1-geo, your suggestions (density contouring, Fisher stats, notation auto-detection, richer -S/vector options) are noted and intentionally not in this first PR — the plan is to land plotting first, then follow up with statistics in a later PR once the plotting side is settled.
What's implemented:
-T[d|l|p]— planes as strike/dip (right-hand rule) or dip-direction/dip, or lines as trend/plunge-W/-S/-L/-G— cyclographic traces and poles (or lines), styled like plot-A/-B— azimuth ring and the net's own grid mesh, both opt-in-T+u— upper hemisphereTested with (no automated tests yet — these are the scripts I manually ran and checked; anyone from #9156 is welcome to run them too):
0_Empty_Nets.sh— empty Schmidt and Wulff nets, with title, grid, and azimuth ring, no data1_Plot_Data.sh— a plane + its pole from strike/dip (RHR) input, styled independently2_Plot_Data_Inverted.sh— same data with columns swapped;-:and-i1,0should reproduce script 1 exactly3_Plot_Planes_Conventions.sh— the same plane entered as-Tp(strike/dip, RHR) and-Td(dip-direction/dip); traces should coincide4_Plot_Poles_Conventions.sh—-Tpand-Tdpoles for the same two planes should coincide (red under blue);-Tlreuses the same numbers as a line's trend/plunge instead, which is a different quantity and lands elsewhere on purpose5_Annotations.sh— fractional azimuth interval (-A22.5) with a title and-ViModel/effort: Claude Opus 5 for design and code review, Claude Sonnet 5 for iteration and testing.
Related to #9156.