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charts3.cpp
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/*
** Astrolog (Version 7.20) File: charts3.cpp
**
** IMPORTANT NOTICE: Astrolog and all chart display routines and anything
** not enumerated below used in this program are Copyright (C) 1991-2021 by
** Walter D. Pullen ([email protected], http://www.astrolog.org/astrolog.htm).
** Permission is granted to freely use, modify, and distribute these
** routines provided these credits and notices remain unmodified with any
** altered or distributed versions of the program.
**
** The main ephemeris databases and calculation routines are from the
** library SWISS EPHEMERIS and are programmed and copyright 1997-2008 by
** Astrodienst AG. The use of that source code is subject to the license for
** Swiss Ephemeris Free Edition, available at http://www.astro.com/swisseph.
** This copyright notice must not be changed or removed by any user of this
** program.
**
** Additional ephemeris databases and formulas are from the calculation
** routines in the program PLACALC and are programmed and Copyright (C)
** 1989,1991,1993 by Astrodienst AG and Alois Treindl ([email protected]). The
** use of that source code is subject to regulations made by Astrodienst
** Zurich, and the code is not in the public domain. This copyright notice
** must not be changed or removed by any user of this program.
**
** The original planetary calculation routines used in this program have
** been copyrighted and the initial core of this program was mostly a
** conversion to C of the routines created by James Neely as listed in
** 'Manual of Computer Programming for Astrologers', by Michael Erlewine,
** available from Matrix Software.
**
** Atlas composed using data from https://www.geonames.org/ licensed under a
** Creative Commons Attribution 4.0 License. Time zone changes composed using
** public domain TZ database: https://data.iana.org/time-zones/tz-link.html
**
** The PostScript code within the core graphics routines are programmed
** and Copyright (C) 1992-1993 by Brian D. Willoughby ([email protected]).
**
** More formally: This program is free software; you can redistribute it
** and/or modify it under the terms of the GNU General Public License as
** published by the Free Software Foundation; either version 2 of the
** License, or (at your option) any later version. This program is
** distributed in the hope that it will be useful and inspiring, but
** WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
** General Public License for more details, a copy of which is in the
** LICENSE.HTM file included with Astrolog, and at http://www.gnu.org
**
** Initial programming 8/28-30/1991.
** X Window graphics initially programmed 10/23-29/1991.
** PostScript graphics initially programmed 11/29-30/1992.
** Last code change made 4/11/2021.
*/
#include "astrolog.h"
/*
******************************************************************************
** Multiple Chart Scanning Routines.
******************************************************************************
*/
// Display a list of transit events. Called from ChartInDaySearch().
void PrintInDays(InDayInfo *pid, int occurcount, int counttotal, flag fProg)
{
char sz[cchSzDef];
int fVoid, nVoid, i, j, k, s1, s2, s3;
#ifdef EXPRESS
int nEclipse;
real rEclipse;
#endif
for (i = 0; i < occurcount; i++) {
// Detect whether this aspect indicates the Moon going void of course, and
// if so how long the Moon is v/c before entering next sign. This requires
// the sign change event to be in the same list as the Moon aspect.
nVoid = -1;
fVoid = FAspectVoid(pid[i].source, pid[i].dest, pid[i].aspect);
#ifdef EXPRESS
// Adjust whether this aspect can be going v/c if AstroExpression says so.
if (!us.fExpOff && FSzSet(us.szExpVoid)) {
ExpSetN(iLetterV, 0);
ExpSetN(iLetterW, pid[i].source);
ExpSetN(iLetterX, pid[i].aspect);
ExpSetN(iLetterY, pid[i].dest);
ExpSetN(iLetterZ, fVoid);
ParseExpression(us.szExpVoid);
fVoid = NExpGet(iLetterZ);
}
#endif
if (fVoid) {
for (j = i+1; j < counttotal; j++) {
fVoid = FAspectVoid(pid[j].source, pid[j].dest, pid[j].aspect);
#ifdef EXPRESS
// Adjust whether aspect can be going v/c if AstroExpression says so.
if (!us.fExpOff && FSzSet(us.szExpVoid)) {
ExpSetN(iLetterV, 0);
ExpSetN(iLetterW, pid[j].source);
ExpSetN(iLetterX, pid[j].aspect);
ExpSetN(iLetterY, pid[j].dest);
ExpSetN(iLetterZ, fVoid);
ParseExpression(us.szExpVoid);
fVoid = NExpGet(iLetterZ);
}
#endif
if (fVoid)
break;
fVoid = (pid[j].aspect == aSig && pid[j].source == oMoo);
#ifdef EXPRESS
// Adjust whether event can be ending v/c if AstroExpression says so.
if (!us.fExpOff && FSzSet(us.szExpVoid)) {
ExpSetN(iLetterV, 1);
ExpSetN(iLetterW, pid[j].source);
ExpSetN(iLetterX, pid[j].aspect);
ExpSetN(iLetterY, pid[j].dest);
ExpSetN(iLetterZ, fVoid);
ParseExpression(us.szExpVoid);
fVoid = NExpGet(iLetterZ);
}
#endif
if (fVoid) {
nVoid = pid[j].day - pid[i].day;
if (nVoid < 0)
nVoid += DayInMonth(pid[i].mon, pid[i].yea);
nVoid *= 24*60*60;
nVoid += (int)((pid[j].time - pid[i].time) * 60.0);
break;
}
}
}
// Display the current transit event.
s1 = (int)pid[i].time/60;
s2 = (int)pid[i].time-s1*60;
s3 = us.fSeconds ? (int)(pid[i].time*60.0)-((s1*60+s2)*60) : -1;
SetCI(ciSave, pid[i].mon, pid[i].day, pid[i].yea,
pid[i].time / 60.0, Dst, Zon, Lon, Lat);
if ((!us.fExpOff && FSzSet(us.szExpDay)) || (us.fEclipse &&
!us.fParallel && (pid[i].aspect == aCon || pid[i].aspect == aOpp))) {
ciCore = ciSave;
CastChart(-1);
}
#ifdef EXPRESS
// May want to skip current event if AstroExpression says to do so.
if (!us.fExpOff && FSzSet(us.szExpDay)) {
nEclipse = etUndefined; rEclipse = 0.0;
if (us.fEclipse && !us.fParallel) {
if (pid[i].aspect == aCon)
nEclipse = NCheckEclipse(pid[i].source, pid[i].dest, &rEclipse);
else if (pid[i].aspect == aOpp && pid[i].source == oSun &&
ObjOrbit(pid[i].dest) == us.objCenter)
nEclipse = NCheckEclipseLunar(us.objCenter, pid[i].dest, &rEclipse);
}
ExpSetN(iLetterU, pid[i].source);
ExpSetN(iLetterV, pid[i].aspect);
ExpSetN(iLetterW, pid[i].dest);
ExpSetN(iLetterX, nVoid);
ExpSetN(iLetterY, nEclipse);
ExpSetR(iLetterZ, rEclipse);
if (!NParseExpression(us.szExpDay))
continue;
}
#endif
#ifdef GRAPH
// May want to draw current event within a graphic calendar box.
if (gi.rgzCalendar) {
for (j = i; j >= 0 && pid[j].day == pid[i].day; j--)
;
for (k = i; k < occurcount && pid[k].day == pid[i].day; k++)
;
DrawCalendarAspect(&pid[i], i-j, k-j, nVoid);
continue;
}
#endif
k = DayOfWeek(pid[i].mon, pid[i].day, pid[i].yea);
AnsiColor(kRainbowA[k + 1]);
sprintf(sz, "%.3s ", szDay[k]); PrintSz(sz);
AnsiColor(kDefault);
sprintf(sz, "%s %s ",
SzDate(pid[i].mon, pid[i].day, pid[i].yea, fFalse),
SzTime(s1, s2, s3)); PrintSz(sz);
PrintAspect(pid[i].source, pid[i].pos1, pid[i].ret1, pid[i].aspect,
pid[i].dest, pid[i].pos2, pid[i].ret2, (char)(fProg ? 'e' : 'd'));
PrintInDayEvent(pid[i].source, pid[i].aspect, pid[i].dest, nVoid);
}
}
// Search through a day or longer period, and print out the times of exact
// aspects among planets during that day, as specified with the -d switch,
// as well as times when planets changes sign or direction. To do this, cast
// charts for the beginning and end of the day (or a part of a day) and do a
// linear equation check to see if anything happens during the interval.
void ChartInDaySearch(flag fProg)
{
InDayInfo id[MAXINDAY], idT, *pid = id;
int yea0, yea1, yea2, mon0, mon1, mon2, day0, day1, day2, counttotal = 0,
occurcount, maxinday = MAXINDAY, division, div, divSign,
i, j, k, l, s1, s2;
real divsiz, d1, d2, e1, e2, f1, f2, g;
flag fYear, fVoid, fPrint = fTrue;
// If parameter 'fProg' is set, look for changes in a progressed chart.
#ifdef GRAPH
fPrint &= (gi.rgzCalendar == NULL);
#endif
fYear = us.fInDayMonth && us.fInDayYear;
fVoid = !FIgnore(oMoo) && !us.fIgnoreSign && us.fInDayMonth;
division = (fYear || fProg) ? (us.nDivision + 9) / 10 : us.nDivision;
divsiz = 24.0 / (real)division*60.0;
divSign = cSign * us.nSignDiv;
// If -dY in effect, then search through a range of years.
yea1 = yea2 = !fProg ? Yea : YeaT;
if (fYear && us.nEphemYears != 0) {
if (us.nEphemYears < 0)
yea1 += (us.nEphemYears + 1);
else
yea2 += (us.nEphemYears - 1);
}
for (yea0 = yea1; yea0 <= yea2; yea0++) {
// If -dy in effect, then search through the whole year, month by month.
if (fYear) {
mon1 = 1; mon2 = 12;
} else
mon1 = mon2 = !fProg ? Mon : MonT;
// Start searching the month or months in question for exciting events.
for (mon0 = mon1; mon0 <= mon2; mon0++) {
if (us.fInDayMonth) {
day1 = 1;
day2 = DayInMonth(mon0, yea0);
} else
day1 = day2 = !fProg ? Day : DayT;
// Start searching the day or days in question for exciting events.
for (day0 = day1; day0 <= day2; day0 = AddDay(mon0, day0, yea0, 1)) {
occurcount = 0;
maxinday = MAXINDAY - (int)(pid - id);
// Cast chart for beginning of day and store it for future use.
SetCI(ciCore, mon0, day0, yea0, 0.0, Dst, Zon, Lon, Lat);
if (us.fProgress = fProg) {
is.JDp = MdytszToJulian(mon0, day0, yea0, 0.0, Dst, Zon);
ciCore = ciMain;
}
CastChart(-1);
cp2 = cp0;
// Now divide the day into segments and search each segment in turn.
// More segments is slower, but has slightly better time accuracy.
for (div = 1; div <= division; div++) {
// Cast the chart for the ending time of the present segment. The
// beginning time chart is copied from the previous end time chart.
SetCI(ciCore, mon0, day0, yea0,
24.0*(real)div/(real)division, Dst, Zon, Lon, Lat);
if (fProg) {
is.JDp = MdytszToJulian(mon0, day0, yea0, TT, Dst, Zon);
ciCore = ciMain;
}
CastChart(-1);
cp1 = cp2; cp2 = cp0;
// Now search through the present segment for anything exciting.
for (i = 0; i <= is.nObj; i++)
if (!FIgnore(i) && (fProg || us.fGraphAll || FThing(i))) {
s1 = SFromZ(cp1.obj[i])-1;
s2 = SFromZ(cp2.obj[i])-1;
// Does the current planet change into the next or previous sign?
if (!us.fIgnoreSign && FAllow(i) && occurcount < maxinday) {
l = NAbs(s1-s2);
if (s1 != s2 && (l == 1 || l == cSign-1)) {
pid[occurcount].source = i;
pid[occurcount].aspect = aSig;
pid[occurcount].dest = s2+1;
pid[occurcount].time = MinDistance(cp1.obj[i],
(real)(cp1.dir[i] >= 0.0 ? s2 : s1) * 30.0) / MinDistance(
cp1.obj[i], cp2.obj[i])*divsiz + (real)(div-1)*divsiz;
pid[occurcount].pos1 = pid[occurcount].pos2 = ZFromS(s1+1);
pid[occurcount].ret1 = pid[occurcount].ret2 =
(int)RSgn(cp1.dir[i]) + (int)RSgn(cp2.dir[i]);
pid[occurcount].mon = mon0;
pid[occurcount].day = day0;
pid[occurcount].yea = yea0;
occurcount++;
// Does the current planet change into next or previous degree?
} else if (us.nSignDiv > 1) {
j = (int)(cp1.obj[i] / (rDegMax / (real)divSign));
k = (int)(cp2.obj[i] / (rDegMax / (real)divSign));
l = NAbs(j-k);
if (j != k && (l == 1 || l == divSign-1)) {
l = k;
if (j == k+1 || j == k-(divSign-1))
l = j;
pid[occurcount].source = i;
pid[occurcount].aspect = aDeg;
pid[occurcount].dest = l;
pid[occurcount].time = MinDistance(cp1.obj[i],
(real)l * (rDegMax / (real)divSign)) / MinDistance(cp1.obj[i],
cp2.obj[i])*divsiz + (real)(div-1)*divsiz;
pid[occurcount].pos1 = pid[occurcount].pos2 = cp1.obj[i];
pid[occurcount].ret1 = pid[occurcount].ret2 = (l == k) ? 1 : -1;
pid[occurcount].mon = mon0;
pid[occurcount].day = day0;
pid[occurcount].yea = yea0;
occurcount++;
}
}
}
// Does the current planet go retrograde or direct?
if (!us.fIgnoreDir && (cp1.dir[i] < 0.0) != (cp2.dir[i] < 0.0) &&
FAllow(i) && occurcount < maxinday) {
pid[occurcount].source = i;
pid[occurcount].aspect = aDir;
pid[occurcount].dest = cp2.dir[i] < 0.0;
pid[occurcount].time = RAbs(cp1.dir[i])/(RAbs(cp1.dir[i])+
RAbs(cp2.dir[i]))*divsiz + (real)(div-1)*divsiz;
pid[occurcount].pos1 = pid[occurcount].pos2 =
RAbs(cp1.dir[i])/(RAbs(cp1.dir[i])+RAbs(cp2.dir[i])) *
(cp2.obj[i]-cp1.obj[i]) + cp1.obj[i];
pid[occurcount].ret1 = pid[occurcount].ret2 = 0;
pid[occurcount].mon = mon0;
pid[occurcount].day = day0;
pid[occurcount].yea = yea0;
occurcount++;
}
// Does the current planet reach maximum or minimum latitude?
if (!us.fIgnoreDiralt && (cp1.diralt[i] < 0.0) != (cp2.diralt[i] < 0.0)
&& FAllow(i) && occurcount < maxinday) {
pid[occurcount].source = i;
pid[occurcount].aspect = aAlt;
pid[occurcount].dest = cp2.diralt[i] < 0.0;
pid[occurcount].time = RAbs(cp1.diralt[i])/(RAbs(cp1.diralt[i])+
RAbs(cp2.diralt[i]))*divsiz + (real)(div-1)*divsiz;
pid[occurcount].pos1 = pid[occurcount].pos2 =
RAbs(cp1.diralt[i])/(RAbs(cp1.diralt[i])+RAbs(cp2.diralt[i])) *
(cp2.obj[i]-cp1.obj[i]) + cp1.obj[i];
pid[occurcount].ret1 = pid[occurcount].ret2 =
(int)RSgn(cp1.dir[i]) + (int)RSgn(cp2.dir[i]);
pid[occurcount].mon = mon0;
pid[occurcount].day = day0;
pid[occurcount].yea = yea0;
occurcount++;
}
// Does the current planet reach maximum or minimum distance?
if (!us.fIgnoreDirlen && (cp1.dirlen[i] < 0.0) != (cp2.dirlen[i] < 0.0)
&& FAllow(i) && occurcount < maxinday) {
pid[occurcount].source = i;
pid[occurcount].aspect = aLen;
pid[occurcount].dest = cp2.dirlen[i] < 0.0;
pid[occurcount].time = RAbs(cp1.dirlen[i])/(RAbs(cp1.dirlen[i])+
RAbs(cp2.dirlen[i]))*divsiz + (real)(div-1)*divsiz;
pid[occurcount].pos1 = pid[occurcount].pos2 =
RAbs(cp1.dirlen[i])/(RAbs(cp1.dirlen[i])+RAbs(cp2.dirlen[i])) *
(cp2.obj[i]-cp1.obj[i]) + cp1.obj[i];
pid[occurcount].ret1 = pid[occurcount].ret2 =
(int)RSgn(cp1.dir[i]) + (int)RSgn(cp2.dir[i]);
pid[occurcount].mon = mon0;
pid[occurcount].day = day0;
pid[occurcount].yea = yea0;
occurcount++;
}
// Now search for anything making an aspect to the current planet.
for (j = i+1; j <= is.nObj; j++)
if (!FIgnore(j) && (fProg || us.fGraphAll || FThing(j)))
if (!us.fParallel) {
for (k = 1; k <= us.nAsp; k++) if (FAcceptAspect(i, -k, j)) {
d1 = cp1.obj[i]; d2 = cp2.obj[i];
e1 = cp1.obj[j]; e2 = cp2.obj[j];
if (MinDistance(d1, d2) < MinDistance(e1, e2)) {
SwapR(&d1, &e1);
SwapR(&d2, &e2);
}
// Search each potential aspect in turn. First subtract the size
// of the aspect from the angular difference, so can then treat it
// like a conjunction.
if (MinDistance(e1, Mod(d1-rAspAngle[k])) <
MinDistance(e2, Mod(d2+rAspAngle[k]))) {
e1 = Mod(e1+rAspAngle[k]);
e2 = Mod(e2+rAspAngle[k]);
} else {
e1 = Mod(e1-rAspAngle[k]);
e2 = Mod(e2-rAspAngle[k]);
}
// Check to see if the aspect actually occurs during this segment,
// making sure to take into account if one or both planets are
// retrograde or if they cross the Aries point.
f1 = e1-d1;
if (RAbs(f1) > rDegHalf)
f1 -= RSgn(f1)*rDegMax;
f2 = e2-d2;
if (RAbs(f2) > rDegHalf)
f2 -= RSgn(f2)*rDegMax;
if (MinDistance(Midpoint(d1, d2), Midpoint(e1, e2)) < rDegQuad &&
RSgn(f1) != RSgn(f2) && occurcount < maxinday) {
pid[occurcount].source = i;
pid[occurcount].aspect = k;
pid[occurcount].dest = j;
pid[occurcount].mon = mon0;
pid[occurcount].day = day0;
pid[occurcount].yea = yea0;
// Horray! The aspect occurs sometime during the interval. Now
// just have to solve an equation in two variables to find out
// where their "lines" of motion cross, i.e. the aspect's time.
f1 = d2-d1;
if (RAbs(f1) > rDegHalf)
f1 -= RSgn(f1)*rDegMax;
f2 = e2-e1;
if (RAbs(f2) > rDegHalf)
f2 -= RSgn(f2)*rDegMax;
g = (RAbs(d1-e1) > rDegHalf ?
(d1-e1)-RSgn(d1-e1)*rDegMax : d1-e1)/(f2-f1);
pid[occurcount].time = g*divsiz + (real)(div-1)*divsiz;
pid[occurcount].pos1 = Mod(cp1.obj[i] +
RSgn(cp2.obj[i]-cp1.obj[i])*
(RAbs(cp2.obj[i]-cp1.obj[i]) > rDegHalf ? -1 : 1)*
RAbs(g)*MinDistance(cp1.obj[i], cp2.obj[i]));
pid[occurcount].pos2 = Mod(cp1.obj[j] +
RSgn(cp2.obj[j]-cp1.obj[j])*
(RAbs(cp2.obj[j]-cp1.obj[j]) > rDegHalf ? -1 : 1)*
RAbs(g)*MinDistance(cp1.obj[j], cp2.obj[j]));
pid[occurcount].ret1 =
(int)RSgn(cp1.dir[i]) + (int)RSgn(cp2.dir[i]);
pid[occurcount].ret2 =
(int)RSgn(cp1.dir[j]) + (int)RSgn(cp2.dir[j]);
occurcount++;
}
}
} else {
for (k = 1; k <= Min(us.nAsp, aOpp); k++)
if (FAcceptAspect(i, -k, j)) {
d1 = cp1.alt[i]; d2 = cp2.alt[i];
e1 = cp1.alt[j]; e2 = cp2.alt[j];
g = cp1.obj[i]; EclToEqu(&g, &d1);
g = cp2.obj[i]; EclToEqu(&g, &d2);
g = cp1.obj[j]; EclToEqu(&g, &e1);
g = cp2.obj[j]; EclToEqu(&g, &e2);
// Search each potential aspect in turn. Negate the sign of the
// aspect if needed, so can then treat it like a parallel.
if (k == aOpp) {
neg(e1);
neg(e2);
}
// Check if the aspect actually occurs during this segment, making
// sure to take into account if one or both planets are retrograde.
f1 = e1-d1;
f2 = e2-d2;
if (RSgn(f1) != RSgn(f2) && occurcount < maxinday) {
pid[occurcount].source = i;
pid[occurcount].aspect = k;
pid[occurcount].dest = j;
pid[occurcount].mon = mon0;
pid[occurcount].day = day0;
pid[occurcount].yea = yea0;
// Horray! The aspect occurs sometime during the interval. Now
// just have to solve an equation in two variables to find out
// where their "lines" of motion cross, i.e. the aspect's time.
f1 = d2-d1;
f2 = e2-e1;
g = (d1-e1)/(f2-f1);
pid[occurcount].time = g*divsiz + (real)(div-1)*divsiz;
pid[occurcount].pos1 = Mod(cp1.obj[i]+
RSgn(cp2.obj[i]-cp1.obj[i])*
(RAbs(cp2.obj[i]-cp1.obj[i]) > rDegHalf ? -1 : 1)*
RAbs(g)*MinDistance(cp1.obj[i], cp2.obj[i]));
pid[occurcount].pos2 = Mod(cp1.obj[j]+
RSgn(cp2.obj[j]-cp1.obj[j])*
(RAbs(cp2.obj[j]-cp1.obj[j]) > rDegHalf ? -1 : 1)*
RAbs(g)*MinDistance(cp1.obj[j], cp2.obj[j]));
pid[occurcount].ret1 =
(int)RSgn(cp1.dir[i]) + (int)RSgn(cp2.dir[i]);
pid[occurcount].ret2 =
(int)RSgn(cp1.dir[j]) + (int)RSgn(cp2.dir[j]);
occurcount++;
}
}
} // us.fParallel
} // i
} // div
// After all the aspects and evemts in the day have been located, sort
// them by time at which they occur, so can print them in order.
for (i = 1; i < occurcount; i++) {
j = i-1;
while (j >= 0 && pid[j].time > pid[j+1].time) {
idT = pid[j]; pid[j] = pid[j+1]; pid[j+1] = idT;
j--;
}
}
// Finally, loop through and display each aspect and when it occurs.
if (!fVoid || (day0 >= day2 && mon0 >= mon2 && yea0 >= yea2)) {
// If no v/c aspects, or reached end of period, output all at once.
if (fVoid) {
occurcount += (int)(pid - id);
pid = id;
}
PrintInDays(id, occurcount, occurcount, fProg);
} else {
// Output a chunk of events, knowing there's more to come.
pid += occurcount;
j = MAXINDAY >> 2;
if (pid - id > j << 1) {
#ifdef GRAPH
if (gi.rgzCalendar != NULL && id[j].day != id[0].day) {
// Don't split day when drawing within calendar boxes.
while (j > 0 && id[j].day == id[j-1].day)
j--;
}
#endif
PrintInDays(id, j, pid - id, fProg);
for (i = 0; i < pid - id - j; i++)
id[i] = id[i + j];
pid -= j;
}
}
if (occurcount >= maxinday && fPrint)
PrintSz("Too many transit events found.\n");
counttotal += occurcount;
} // day0
} // mon0
} // yea0
if (counttotal == 0 && fPrint)
PrintSz("No transit events found.\n");
// Recompute original chart placements as have overwritten them.
ciCore = ciMain;
CastChart(1);
}
// Search through a month, year, or years, and print out the times of exact
// transits where planets in the time frame make aspect to the planets in
// some other chart, as specified with the -t switch. To do this, cast charts
// for the start and end of each month, or within a month, and do an equation
// check for aspects to the other base chart during the interval.
void ChartTransitSearch(flag fProg)
{
real time[MAXINDAY];
char sz[cchSzDef];
int source[MAXINDAY], aspect[MAXINDAY], dest[MAXINDAY], isret[MAXINDAY],
M1, M2, Y1, Y2, counttotal = 0, occurcount, division, div, nAsp, fNoCusp,
i, j, k, s1, s2, s3, s4;
real pos[MAXINDAY],
divsiz, daysiz, d, e1, e2, f1, f2, mc = is.MC, ob = is.OB;
CP cpT = cp0;
CI ciT;
// Save away natal chart and initialize things.
ciT = ciTran;
if (fProg)
fNoCusp = fFalse;
else {
fNoCusp = fTrue;
for (i = cuspLo; i <= cuspHi; i++)
fNoCusp &= ignore2[i];
}
division = us.nDivision;
if (!fProg && !fNoCusp)
division = Max(division, 96);
nAsp = is.fReturn ? aCon : us.nAsp;
if (us.fParallel)
nAsp = Min(nAsp, aOpp);
Y1 = Y2 = YeaT;
M1 = M2 = MonT;
if (us.fInDayYear) {
M1 = 1; M2 = 12;
if (us.nEphemYears != 0) {
if (us.nEphemYears < 0)
Y1 += (us.nEphemYears + 1);
else
Y2 += (us.nEphemYears - 1);
}
}
// Start searching the year or years in question for any transits.
for (YeaT = Y1; YeaT <= Y2; YeaT++)
// Start searching the month or months in question for any transits.
for (MonT = M1; MonT <= M2; MonT++) {
daysiz = (real)(us.fInDayMonth ? DayInMonth(MonT, YeaT) : 1)*24.0*60.0;
divsiz = daysiz / (real)division;
// Cast chart for beginning of month and store it for future use.
SetCI(ciCore, MonT, us.fInDayMonth ? 1 : DayT, YeaT, 0.0, DstT, ZonT,
LonT, LatT);
if (us.fProgress = fProg) {
is.JDp = MdytszToJulian(MM, DD, YY, 0.0, SS, ZZ);
ciCore = ciMain;
}
for (i = 0; i <= oNorm; i++)
SwapN(ignore[i], ignore2[i]);
CastChart(-1);
for (i = 0; i <= oNorm; i++)
SwapN(ignore[i], ignore2[i]);
cp2 = cp0;
// Divide month into segments and then search each segment in turn.
for (div = 1; div <= division; div++) {
occurcount = 0;
// Cast the chart for the ending time of the present segment, and copy
// the start time chart from the previous end time chart.
d = (us.fInDayMonth ? 1.0 : (real)DayT) +
(daysiz/24.0/60.0)*(real)div/(real)division;
SetCI(ciCore, MonT, (int)d, YeaT, RFract(d)*24.0,
DstT, ZonT, LonT, LatT);
if (fProg) {
is.JDp = MdytszToJulian(MM, DD, YY, 0.0, SS, ZZ);
ciCore = ciMain;
}
for (i = 0; i <= oNorm; i++)
SwapN(ignore[i], ignore2[i]);
CastChart(-1);
for (i = 0; i <= oNorm; i++)
SwapN(ignore[i], ignore2[i]);
cp1 = cp2; cp2 = cp0;
// Now search through the present segment for any transits. Note that
// stars can be transited, but they can't make transits themselves.
for (i = 0; i <= is.nObj; i++) {
// Check if 3D house change occurs during time segment.
if (us.fHouse3D && !us.fIgnoreSign && !FIgnore2(i)) {
is.MC = mc; is.OB = ob;
e1 = cp1.obj[i]; f1 = RHousePlaceIn3D(e1, cp1.alt[i]);
e2 = cp2.obj[i]; f2 = RHousePlaceIn3D(e2, cp2.alt[i]);
s1 = SFromZ(f1)-1; s2 = SFromZ(f2)-1;
k = NAbs(s1-s2);
if (s1 != s2 && (k == 1 || k == cSign-1) && !FIgnore(cuspLo+s2) &&
occurcount < MAXINDAY) {
source[occurcount] = i;
aspect[occurcount] = aHou;
dest[occurcount] = s2+1;
time[occurcount] = MinDistance(f1,
(real)(cp1.dir[i] >= 0.0 ? s2 : s1) * 30.0) /
MinDistance(f1, f2)*divsiz + (real)(div-1)*divsiz;
pos[occurcount] = cp1.obj[i];
isret[occurcount] = (int)RSgn(cp1.dir[i]) +
(int)RSgn(cp2.dir[i]);
occurcount++;
}
}
if (FIgnore(i))
continue;
for (j = 0; j <= oNorm; j++) {
if ((is.fReturn ? i != j : FIgnore2(j)) || (fNoCusp && !FThing(j)))
continue;
// Between each pair of planets, check if they make any aspects.
if (!us.fParallel) {
for (k = 1; k <= nAsp; k++) if (FAcceptAspect(i, k, j)) {
d = cpT.obj[i]; e1 = cp1.obj[j]; e2 = cp2.obj[j];
if (MinDistance(e1, Mod(d-rAspAngle[k])) <
MinDistance(e2, Mod(d+rAspAngle[k]))) {
e1 = Mod(e1+rAspAngle[k]);
e2 = Mod(e2+rAspAngle[k]);
} else {
e1 = Mod(e1-rAspAngle[k]);
e2 = Mod(e2-rAspAngle[k]);
}
// Check to see if the present aspect actually occurs during the
// segment, making sure we check any Aries point crossings.
f1 = e1-d;
if (RAbs(f1) > rDegHalf)
f1 -= RSgn(f1)*rDegMax;
f2 = e2-d;
if (RAbs(f2) > rDegHalf)
f2 -= RSgn(f2)*rDegMax;
if (MinDistance(d, Midpoint(e1, e2)) < rDegQuad &&
RSgn(f1) != RSgn(f2) && occurcount < MAXINDAY) {
// Ok, have found a transit! Now determine the time and save
// this transit in our list to be printed.
source[occurcount] = j;
aspect[occurcount] = k;
dest[occurcount] = i;
time[occurcount] = RAbs(f1)/(RAbs(f1)+RAbs(f2))*divsiz +
(real)(div-1)*divsiz;
pos[occurcount] = Mod(
MinDistance(cp1.obj[j], Mod(d-rAspAngle[k])) <
MinDistance(cp2.obj[j], Mod(d+rAspAngle[k])) ?
d-rAspAngle[k] : d+rAspAngle[k]);
isret[occurcount] = (int)RSgn(cp1.dir[j]) +
(int)RSgn(cp2.dir[j]);
occurcount++;
}
}
} else {
for (k = 1; k <= nAsp; k++) if (FAcceptAspect(i, k, j)) {
d = cpT.alt[i]; e1 = cp1.alt[j]; e2 = cp2.alt[j];
if (k == aOpp) {
neg(e1);
neg(e2);
}
// Check if parallel aspect occurs during time segment.
f1 = e1-d;
f2 = e2-d;
if (RSgn(f1) != RSgn(f2) && occurcount < MAXINDAY) {
// Ok, found a parallel transit. Now determine the time and save
// this transit in the list to be printed.
source[occurcount] = j;
aspect[occurcount] = k;
dest[occurcount] = i;
time[occurcount] = RAbs(f1)/(RAbs(f1)+RAbs(f2))*divsiz +
(real)(div-1)*divsiz;
pos[occurcount] = cpT.obj[i];
isret[occurcount] = (int)RSgn(cp1.dir[j]) +
(int)RSgn(cp2.dir[j]);
occurcount++;
}
}
} // us.fParallel
} // j
} // i
// After all transits located, sort them by time at which they occur.
for (i = 1; i < occurcount; i++) {
j = i-1;
while (j >= 0 && time[j] > time[j+1]) {
SwapN(source[j], source[j+1]);
SwapN(aspect[j], aspect[j+1]);
SwapN(dest[j], dest[j+1]);
SwapR(&time[j], &time[j+1]);
SwapR(&pos[j], &pos[j+1]);
SwapN(isret[j], isret[j+1]);
j--;
}
}
// Now loop through list and display all the transits.
for (i = 0; i < occurcount; i++) {
j = (int)(time[i] * 60.0);
if (us.fInDayMonth) {
s1 = j / (24*60*60);
j = j - s1 * (24*60*60);
} else
s1 = DayT-1;
s2 = j / (60*60);
k = j - s2 * (60*60);
s3 = k / 60;
s4 = us.fSeconds ? k - s3*60 : -1;
SetCI(ciSave, MonT, s1+1, YeaT, (real)j / (60.0*60.0),
DstT, ZonT, LonT, LatT);
#ifdef EXPRESS
// May want to skip this transit if AstroExpression says to do so.
if (!us.fExpOff && FSzSet(us.szExpTra)) {
ciCore = ciSave;
CastChart(-1);
ExpSetN(iLetterX, source[i]);
ExpSetN(iLetterY, aspect[i]);
ExpSetN(iLetterZ, dest[i]);
if (!NParseExpression(us.szExpTra))
continue;
}
#endif
if (us.fSeconds) {
k = DayOfWeek(MonT, s1+1, YeaT);
AnsiColor(kRainbowA[k + 1]);
sprintf(sz, "%.3s ", szDay[k]); PrintSz(sz);
AnsiColor(kDefault);
}
sprintf(sz, "%s %s ",
SzDate(MonT, s1+1, YeaT, fFalse), SzTime(s2, s3, s4)); PrintSz(sz);
PrintAspect(source[i], pos[i], isret[i], aspect[i],
dest[i], cpT.obj[dest[i]], (int)RSgn(cpT.dir[dest[i]]),
(char)(fProg ? 'u' : 't'));
// Check for a Solar, Lunar, or any other return.
if (aspect[i] == aCon && source[i] == dest[i]) {
AnsiColor(kWhiteA);
sprintf(sz, " (%s Return)", source[i] == oSun ? "Solar" :
(source[i] == oMoo ? "Lunar" : szObjDisp[source[i]]));
PrintSz(sz);
}
PrintL();
#ifdef INTERPRET
if (us.fInterpret)
InterpretTransit(source[i], aspect[i], dest[i]);
#endif
AnsiColor(kDefault);
}
if (occurcount >= MAXINDAY)
PrintSz("Too many transits found.\n");
counttotal += occurcount;
} // div
} // MonT
if (counttotal == 0)
PrintSz("No transits found.\n");
// Recompute original chart placements as have overwritten them.
ciCore = ciMain; ciTran = ciT;
cp0 = cpT;
us.fProgress = fFalse;
CastChart(1);
}
// Print a chart graphing transits over time. This covers both transit
// to transit (-B switch) and transit to natal (-V switch). Each aspect
// present during the period has its own row, showing its strength from 0-9
// (blank=aspect out of orb, "0"=0-9% of max strength, "9"=90-100% exact).
void ChartTransitGraph(flag fTrans, flag fProg)
{
TransGraInfo *rgEph;
word **ppw, *pw, *pw2;
char sz[cchSzDef];
int cAsp, cSlice, cYea, dYea, occurcount = 0, ymin, x0, y0, x, y, asp,
iw, iwFocus, nMax, n, ch, obj, et;
flag fMonth = us.fInDayMonth, fYear = us.fInDayYear, fMark, fEclipse =
us.fEclipse && !fTrans && !us.fParallel;
CI ciT;
real rT, rPct;
// Initialize variables.
rgEph = (TransGraInfo *)PAllocate(sizeof(TransGraInfo),
"transit graph grid");
if (rgEph == NULL)
goto LDone;
ClearB((pbyte)(*rgEph), sizeof(TransGraInfo));
if (!fTrans && !fProg)
ciT = ciMain;
else
ciT = ciTran;
cAsp = fTrans && is.fReturn ? aCon : us.nAsp;
ymin = 1-fTrans;
// Determine character width of chart based on time period being graphed.
if (!fMonth) {
cSlice = 49;
iwFocus = (int)(ciT.tim / 0.5);
} else if (!fYear) {
cSlice = (DayInMonth(ciT.mon, ciT.yea) << 1) + 1;
iwFocus = ((ciT.day-1) << 1) + (ciT.tim >= 12.0);
} else if (us.nEphemYears <= 1) {
cSlice = 12*5;
iwFocus = (ciT.mon-1)*5 + (Min(ciT.day, 30)-1)/6;
} else {
cYea = Max(us.nEphemYears, 2); cYea = Min(cYea, 21);
dYea = (cYea - 1) >> 1;
cSlice = cYea*12;
iwFocus = dYea*12 + (ciT.mon-1);
}
if (iwFocus == 0 && ciT.tim <= 0.0)
iwFocus = -1;
// Calculate and fill out aspect strength arrays for each aspect present.
if (fTrans || fProg) {
ciCore = ciMain;
us.fProgress = fFalse;
CastChart(0);
cp1 = cp0;
}
for (iw = 0; iw < cSlice; iw++) {
// Cast chart for current time slice.
ciCore = ciT;
if (!fMonth) {
TT = (real)iw * 0.5;
} else if (!fYear) {
DD = (iw >> 1) + 1;
TT = FOdd(iw) ? 12.0 : 0.0;
} else if (us.nEphemYears <= 1) {
MM = (iw / 5) + 1;
DD = (iw % 5) * 5 + 1;
TT = 0.0;
} else {
MM = (iw % 12) + 1;
DD = 1;
YY = YY - dYea + (iw / 12);
TT = 0.0;
}
if (fTrans)
for (obj = 0; obj <= oNorm; obj++)
SwapN(ignore[obj], ignore2[obj]);
if (us.fProgress = fProg) {
is.JDp = MdytszToJulian(MM, DD, YY, TT, SS, ZZ);
ciCore = ciMain;
}
CastChart(-1);
if (fTrans)
for (obj = 0; obj <= oNorm; obj++)
SwapN(ignore[obj], ignore2[obj]);
// Compute aspects present for current time slice.
if (!fTrans) {
if (!FCreateGrid(fFalse))
goto LDone;
} else {
cp2 = cp0;
if (!FCreateGridRelation(fFalse))
goto LDone;
}
// For each aspect present in slice, add its strength to array.
for (y = ymin; y <= is.nObj; y++) {
if (FIgnore(y) || (!fTrans && !FProperGraph(y)))
continue;
for (x = 0; x < (fTrans ? is.nObj+1 : y); x++) {
if (!fTrans ? FIgnore(x) || !FProperGraph(x) :
FIgnore2(x) || !FProperGraph(x) || (is.fReturn && x != y))
continue;
asp = grid->n[x][y];
if (!FBetween(asp, aCon, cAsp))
continue;
ppw = &(*rgEph)[x][y][asp];
if (*ppw == NULL) {
*ppw = (word *)PAllocate(cSlice * sizeof(word),
"transit ephemeris entry");
if (*ppw == NULL)
goto LDone;
pw = *ppw;
ClearB((pbyte)pw, cSlice * sizeof(word));
} else
pw = *ppw;
n = grid->v[x][y];
rT = (real)NAbs(n) / 3600.0;
rT /= GetOrb(x, y, asp);
pw[iw] = 65535 - (int)(rT * (65536.0 - rSmall));
// Check for and add eclipse information to array too.
if (fEclipse) {
et = etNone;
if (asp == aCon)
et = NCheckEclipse(x, y, &rPct);
else if (asp == aOpp && x == oSun && ObjOrbit(y) == us.objCenter)