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GeoCalculatorAuthor R J Holcombe

Version HistoryVersion 1.0 November 1993Version 2.0 prepared in VB 4 for Windows 95 January-April, 1997Version 3.0 compiled in VB5 25/7/97Version 4.0 compiled in VB6 10/3/2000

________________________________________________________Debugs (Youngest to oldest - dates in day/month/year format):

13/4/09 Fixed cramped labels in interface. Channged oriented core routine so that solutions

giving horizontal planes or vertical lines report the same dip/plunge direction as the core9/8/07 Fixed glitch in calculation of drillhole apparent dips introduced in previous change.26/7/07 Add Convention option to choose 'upcore' trend for upwardly inclined drillholes

instead of the geological convention of downward trend of a line. Madecosmetic changes to correct for overlapping options in Conventions pagefor low resolution monitors.

6/12/05 Ver 4.9. Fixed bug not allowing decimal values in quadrant notations.Allowed for comma decimal locales, with the ability to take input values

using either period or comma delimiters, but allowing the Results output

to be fixed to the non-locale setting. Fixed bug not convertingstrike/dip/sense to RH strike correctly. Fixed bug giving wrong quadrant

sensefor some line values in unfolding routines.Compiled to new .exe name so that ver 4.9 can be run simultaneously with

ver 4.827/6/05 Version 4.8. Added option to simultaneously calculate apparent dips fororiented core plane procedures.

Also added new results windows to show the full orientation of any ambiguous results from the

partially oriented core options. Added options to include these new results windows in output files.Added option for appending labels to results columns in output fileFixed bug in App Dip and PlungeToPitch calcs giving answer of 0 pitch fo

r 90 degree planesFixed bug with stereo not plotting core axes entered as zeniths correctl

y.Fixed bug causing crash when changing some strike dip conventions with q

uadrant notations.

3/4/05 Corrected problem with partially oriented core procedures not being completely constrained

by the dip dirn when dip dirn or full orientation was used as the refere

nce control.Added "zenith" option for core orientations. Added indication of ambigui

ty to partiallyoriented core calculations.

20/2/05 Corrected bug giving wrong sense in apparent dip calculations.20/12/04 Recompiled and repackaged to eliminate problem in download package.13/12/04 Fixed bug in drillcore line calculation options where the ellipse/coreangle

to the plane (delta angle) was set at 0 or 180; and the (beta) line angle

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in the plane was set at 270. Added option to not display -ve signs inthe Results, for lines with upward polarity. Added option to separatelydefine whether core 'Bottom' Marks or 'Top' Marks are used as the refere

nce lineChanged default drillcore names to current alpha, beta, gamma usage.Changed Helpfiles to reflect changes. Added more explanation to drillcor

e help files.Changed Unregistered limitations to allow a limited number of drillcore

calculations.

30/11/04 Ver 4.7 Added new calculations for partially oriented drillcore.Corrected a bug causing incorrect resultsin the partially oriented core

calculations.12/12/03 Ver 4.6. Added calculation of trend of a line in a plane given its plunge

(and general sense of plunge).1/12/03 Added two new unfolding calculations.27/10/03 Fixed bug causing crash in drillhole 'line-in-ellipse' calculation whendata entered

from file or clipboard. Added option to retain header line in file output.

Added counters to keep track of progress during file input of large datasets.

Widened column display in File Format dialog.

22/7/03 Add option to set default -ve sign for downward plunging core25/2/03 Fixed obscure bug in drillhole calc that gave gave 90 dip for geographically

horizontal planes. Cosmetic changes made to Conventions page.Forced option changes made in Nomenclature dialog to be reflected inoption buttons on Conventions page.

28/9/02 Cosmetic changes to Registration module22/7/02 Corrected bug in pitch/rake calculations introduced during 29/6/02 corrections.23/6/02 Improved legend in stereo module to prevent character cramping.29/3/02 Corrected a couple of annoyances/bugs in drill-hole calculation:

1) non-acceptance of +- 90 beta angle convention; change of this convention

to +-180 to allow for either beta convention to be used for polar lines;Corrected bug giving incorrect sign for some beta line calculations using

top-of-ellipse alpha convention. Corrected incorrect convention labelling

of alpha convention in help window. Expanded some labels in stereo window

to avoid cramping and illegibility in some displays.20/12/01 Corrected bug in file output procedure that caused no delimiter to be set

between the results columns and the appended input data columns;also corrected bug causing misalignment when the input file containsmissing data elements.

9/9/01 Ver 4.5: Added paste capability, plane bisecting 2 lines,user-defined nomenclature. Corrected bug in pop-up menu selection.

19/8/01 corrected bug causing rare incorrect solution in Pitch to Plunge calculation6/3/01 Corrected bugs causing crash in drillhole beta line calculation (particularly for

unregistered users). Some cosmetic changes correcting text distortion inlower resolution

monitors.17/6/00 Altered limitations for unregistered users: Allowed up to 5 file input d

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ata(instead of zero access); Allowed access to 3 drillhole applications to

allowfor evaluation.

11/5/00 Corrected bug in file input for some calculations (e.g. pitch to plunge)where

the convention for planes was strike/dip/sense.Corrected a couple of captions in the calculation window.

26/3/2000 Version 4 completed.Recompiled using VB6. Version 4 requires new registration codes.Added new calculation options:pitch of line of intersectionof two planes; line and plane bisectors of two planes, plane normal to t

wo otherplanes;Added stereographic projection window for displaying data and results wi

thability to copy results to clipboard with GEOrient format (Registered us

ers only).Added ability to show delta angle small circles in the stereographic rep

resentationof drillhole data. Added two new drillhole calculations (that require us

ing thestereoplot for the final solution).Changed file I/O interface and simplified file input format to one simil

ar to that used in GEOrient.Fixed several minor bugs and improved interface. Viz. in pitch-to-plunge

where plane dip was zero orpitch was zero; fixed rounding routine for some decimal numbers. Added '

pitch'/'rake' naming options.Fixed bug in rotation routines that was incorrectly handling "up"-plunge

solutions.'End of version 3 bugs ______________________________________

5/8/99 Fixed bug that prevented pitches being calculated from input file17/7/99 Version 3.1

Fixed bug that caused incorrect dip senses for some results in which plane

conventions were set to strike, dip, senseFixed problem with button refresh (hopefully).Added calculation of line with given trend lying in a given plane.Allowed fractional dip and strike entry and results

23/10/98 Corrected problem with File Input-Output option to include Input Filelines

in Output file not working.30/1/98 Corrected bug that prevented Planes as dip/dip dir'n from being entered

correctly into windowsCorrected problem with non-data file line options

22/8/97 Bug in processing strike, dip and sense data in some formats.15/8/97 Bug in not recognizing various input conventions for file input.25/7/97 Bug in Registration procedures corrected

1/7/97 corrected incorrect ClearWindow C bug when inputting drillhole data.20-2-95 incorrect calculation in Apparent Dips4-6-95 incorrect file input for pitches and hades

Corrected problem with non-data file line options