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xcharts1.cpp
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xcharts1.cpp
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/*
** Astrolog (Version 7.70) File: xcharts1.cpp
**
** IMPORTANT NOTICE: Astrolog and all chart display routines and anything
** not enumerated below used in this program are Copyright (C) 1991-2024 by
** Walter D. Pullen (Astara@msn.com, 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. Use of that source code is subject to license for Swiss
** Ephemeris Free Edition at https://www.astro.com/swisseph/swephinfo_e.htm.
** 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 (alois@astro.ch). 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 (brianw@sounds.wa.com).
**
** 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 4/22/2024.
*/
#include "astrolog.h"
#ifdef GRAPH
/*
******************************************************************************
** Single Chart Graphics Routines.
******************************************************************************
*/
// Draw a wheel chart, in which the 12 signs and houses are delineated, and
// the planets are inserted in their proper places. This is the default
// graphics chart to generate, as is done when the -v or -w (or no) switches
// are included with -X. Draw the aspects in the middle of chart, too.
void XChartWheel()
{
real xsign[cSign+1], xhouse[cSign+1], xplanet[objMax], symbol[objMax];
int cx, cy, i, j;
real unitx, unity;
// Set up variables and temporarily automatically decrease the horizontal
// chart size to leave room for the sidebar, if that mode is in effect.
if (gs.fText && !us.fVelocity)
gs.xWin -= xSideT;
cx = gs.xWin/2 - 1; cy = gs.yWin/2 - 1;
unitx = (real)cx; unity = (real)cy;
gi.rAsc = gs.objLeft ? planet[NAbs(gs.objLeft)-1] +
rDegQuad*(gs.objLeft < 0) : chouse[1];
if (us.fIndian)
gi.rAsc = gs.objLeft ? (gs.objLeft < 0 ? 120.0 : -60.0)-gi.rAsc : 0.0;
// Fill out arrays with the angular degree on the circle of where to
// place each object, cusp, and sign glyph based on the chart mode.
if (gi.nMode == gWheel) {
for (i = 1; i <= cSign; i++)
xhouse[i] = PZ(chouse[i]);
} else {
gi.rAsc -= chouse[1];
for (i = 1; i <= cSign; i++)
xhouse[i] = PZ(ZFromS(i));
}
for (i = 1; i <= cSign; i++)
xsign[i] = PZ(HousePlaceInX(ZFromS(i), 0.0));
for (i = 0; i <= is.nObj; i++)
xplanet[i] = PZ(HousePlaceInX(planet[i], planetalt[i]));
// Go draw the outer sign and house rings.
DrawWheel(xsign, xhouse, cx, cy, unitx, unity, 0.65, 0.75, 0.80);
// For each planet, draw a small dot indicating where it is, and then a
// line from that point to the planet's glyph.
DrawRing(1, 1, xplanet, symbol, cx, cy, 0.0, 0.0, 0.0,
0.50, 0.52, 0.56, 0.60, 1.0);
FProcessCommandLine(szWheelX[0]);
// Draw lines connecting planets which have aspects between them.
if (!gs.fEquator) { // Don't draw aspects in equator mode.
if (!FCreateGrid(fFalse))
return;
for (j = is.nObj; j >= 1; j--)
for (i = j-1; i >= 0; i--)
if (grid->n[i][j] && FProper(i) && FProper(j))
DrawAspectLine(i, j, cx, cy, xplanet[i], xplanet[j], unitx, unity,
0.48);
}
// Go draw sidebar with chart information and positions if need be.
DrawSidebar();
}
// Draw an astro-graph chart on a map of the world, i.e. the draw the
// Ascendant, Descendant, Midheaven, and Nadir lines corresponding to the
// time in the chart. This chart is done when the -L switch is combined
// with the -X switch.
void XChartAstroGraph()
{
real planet1[objMax], planet2[objMax],
end1[cObj*2+2], end2[cObj*2+2],
symbol1[cObj*2+2], symbol2[cObj*2+2],
lon = Lon, longm, x, y, z, ad, oa, am, od, dm, lat;
int unit = gi.nScale, fVector, lat1 = -60, lat2 = 75, y1, y2, xold1, xold2,
xmid, i, j, k, l;
// Erase top and bottom parts of map. We don't draw the astro-graph lines
// above certain latitudes, and this gives us room for glyph labels, too.
y1 = (90-lat1)*gi.nScale;
y2 = (90-lat2)*gi.nScale;
DrawColor(gi.kiOff);
DrawBlock(0, 1, gs.xWin-1, y2-1);
DrawBlock(0, y1+1, gs.xWin-1, gs.yWin-2);
DrawColor(gi.kiLite);
i = gs.yWin/2;
if (gs.fEquator)
DrawDash(0, i, gs.xWin-2, i, 4); // Draw equator.
DrawColor(gi.kiOn);
DrawLine(1, y2, gs.xWin-2, y2);
DrawLine(1, y1, gs.xWin-2, y1);
for (i = 0; i <= is.nObj*2+1; i++)
end1[i] = end2[i] = -rLarge;
// Draw small hatches every 5 degrees along edges of world map.
DrawColor(gi.kiLite);
for (i = lat1+5; i < lat2; i += 5) {
j = (90-i)*gi.nScale;
k = (2+(i%10 == 0)+2*(i%30 == 0))*gi.nScaleT;
DrawLine(1, j, k, j);
DrawLine(gs.xWin-2, j, gs.xWin-1-k, j);
}
for (i = -nDegHalf+5; i < nDegHalf; i += 5) {
j = (nDegHalf-i)*gi.nScale;
k = (2+(i%10 == 0)+2*(i%30 == 0)+(i%90 == 0))*gi.nScaleT;
DrawLine(j, y2+1, j, y2+k);
DrawLine(j, y1-1, j, y1-k);
}
if (us.fLatitudeCross) {
DrawColor(kPurpleB);
i = (int)((rDegQuad - Lat)*(real)gi.nScale);
DrawLine(0, i, gs.xWin-1, i);
}
// Calculate zenith locations of each planet.
for (i = 0; i <= is.nObj; i++) if (!ignore[i]) {
planet1[i] = Tropical(planet[i]);
planet2[i] = planetalt[i];
EclToEqu(&planet1[i], &planet2[i]);
}
// Draw the Midheaven lines and zenith location markings.
if (lon < 0.0)
lon += rDegMax;
for (i = 0; i <= is.nObj; i++) if (FProper(i)) {
x = cp0.lonMC - planet1[i];
if (x < 0.0)
x += rDegMax;
if (x > rDegHalf)
x -= rDegMax;
z = lon + x;
if (z > rDegHalf)
z -= rDegMax;
j = (int)(Mod(rDegHalf-z+gs.rRot)*(real)gi.nScale);
if (!ignorez[arMC]) {
DrawColor(kElemB[eEar]);
DrawLine(j, y1+unit*4, j, y2-unit*1);
}
end2[i*2] = (real)j;
y = planet2[i];
k = (int)((rDegQuad-y)*(real)gi.nScale);
if (FBetween((int)y, lat1, lat2) && !ignorez[arMC]) {
DrawColor(gi.kiLite);
DrawBlock(j-gi.nScaleT, k-gi.nScaleT, j+gi.nScaleT, k+gi.nScaleT);
DrawColor(gi.kiOff);
DrawBlock(j, k, j, k);
}
// Draw Nadir lines assuming we aren't in bonus chart mode.
if (!gs.fAlt && !ignorez[arIC]) {
j += 180*gi.nScale;
if (j >= gs.xWin)
j -= gs.xWin;
end1[i*2] = (real)j;
DrawColor(kElemB[eWat]);
DrawLine(j, y1+unit*2, j, y2-unit*2);
}
}
// Now, normally (unless are in bonus chart mode) will go on to draw the
// the Ascendant and Descendant lines here.
longm = Mod(cp0.lonMC + lon);
if (!gs.fAlt && (!ignorez[arAsc] || !ignorez[arDes]))
for (i = 1; i <= is.nObj; i++) if (FProper(i)) {
xold1 = xold2 = nNegative;
// Normally the Ascendant and Descendant line segments are drawn
// simultaneously. However, for the PostScript and metafile vector
// graphics, that would cause the file to get inordinately large due
// to the constant thrashing between the Asc and Desc colors. Hence
// for these chart formats only, do two passes for Asc and Desc.
fVector = (gs.ft == ftPS || gs.ft == ftWmf);
for (l = 0; l <= fVector; l++)
for (lat = (real)lat1; lat <= (real)lat2;
lat += 1.0/(real)(gi.nScale/gi.nScaleT)) {
// First compute and draw the current segment of Ascendant line.
j = (int)((rDegQuad-lat)*(real)gi.nScale);
ad = RTanD(planet2[i])*RTanD(lat);
if (ad*ad > 1.0)
ad = rLarge;
else {
ad = RAsin(ad);
oa = planet1[i] - DFromR(ad);
if (oa < 0.0)
oa += rDegMax;
am = oa - rDegQuad;
if (am < 0.0)
am += rDegMax;
z = longm-am;
if (z < 0.0)
z += rDegMax;
if (z > rDegHalf)
z -= rDegMax;
k = (int)(Mod(rDegHalf-z+gs.rRot)*(real)gi.nScale);
if (!fVector || !l) {
if (!ignorez[arAsc]) {
DrawColor(kElemB[eFir]);
DrawWrap(xold1, j+gi.nScaleT, k, j, 1, gs.xWin-2);
}
// Line segment pointing to Ascendant.
if (lat == (real)lat1) {
if (!ignorez[arAsc])
DrawLine(k, y1, k, y1+unit*4);
end2[i*2+1] = (real)k;
}
} else if (lat == (real)lat1)
end2[i*2+1] = (real)k;
xold1 = k;
}
// The curving Ascendant and Descendant lines actually touch at low or
// high latitudes. Sometimes when loop starts out, a particular planet's
// lines haven't appeared yet, i.e. are scanning at a latitude at which
// the planet's lines don't exist. If this is the case, then when they
// finally do start, draw a thin horizontal line connecting the
// Ascendant and Descendant lines so they don't just start in space.
// Note that these connected lines aren't labeled with glyphs.
if (ad == rLarge) {
if (xold1 >= 0) {
if ((!fVector || !l) && !ignorez[arAsc] && !ignorez[arDes]) {
xmid = (xold1+xold2)/2;
if (NAbs(xold2-xold1) > (gs.xWin >> 1)) {
xmid += (gs.xWin >> 1);
if (xmid >= gs.xWin)
xmid -= gs.xWin;
}
DrawColor(kElemB[eFir]);
DrawWrap(xold1, j+1, xmid, j+1, 1, gs.xWin-2);
DrawColor(kElemB[eAir]);
DrawWrap(xmid, j+1, xold2, j+1, 1, gs.xWin-2);
}
lat = rDegQuad;
}
} else {
// Then compute and draw corresponding segment of Descendant line.
od = planet1[i] + DFromR(ad);
dm = od + rDegQuad;
z = longm-dm;
if (z < 0.0)
z += rDegMax;
if (z > rDegHalf)
z -= rDegMax;
k = (int)(Mod(rDegHalf-z+gs.rRot)*(real)gi.nScale);
if (xold2 < 0 && lat > (real)lat1 && (!fVector || l) &&
!ignorez[arDes]) {
xmid = (xold1+k)/2;
if (NAbs(k-xold1) > (gs.xWin >> 1)) {
xmid += (gs.xWin >> 1);
if (xmid >= gs.xWin)
xmid -= gs.xWin;
}
DrawColor(kElemB[eFir]);
DrawWrap(xold1, j, xmid, j, 1, gs.xWin-2);
DrawColor(kElemB[eAir]);
DrawWrap(xmid, j, k, j, 1, gs.xWin-2);
}
if ((!fVector || l) && !ignorez[arDes]) {
DrawColor(kElemB[eAir]);
DrawWrap(xold2, j+gi.nScaleT, k, j, 1, gs.xWin-2);
// Line segment pointing to Descendant.
if (lat == (real)lat1)
DrawLine(k, y1, k, y1+unit*2);
}
xold2 = k;
}
}
// Draw segments pointing to top of Ascendant and Descendant lines.
if (ad != rLarge) {
if (!ignorez[arAsc]) {
DrawColor(kElemB[eFir]);
DrawLine(xold1, y2, xold1, y2-unit*1);
}
if (!ignorez[arDes]) {
DrawColor(kElemB[eAir]);
DrawLine(k, y2, k, y2-unit*2);
}
end1[i*2+1] = (real)k;
}
}
// Plot chart location.
DrawColor(kMagentaB);
i = (int)(Mod(rDegHalf - Lon + gs.rRot)*(real)gi.nScale);
j = (int)((rDegQuad - Lat)*(real)gi.nScale);
if (us.fLatitudeCross)
DrawSpot(i, j);
else
DrawPoint(i, j);
// Determine where to draw the planet glyphs. There are four sets of each
// planet (each planet's glyph appearing in the chart up to four times) one
// for each type of line. The Midheaven and Ascendant lines are always
// labeled at the bottom of the chart, while the Nadir and Descendant lines
// at the top. Therefore need to place two sets of glyphs, twice.
for (i = 0; i <= is.nObj*2+1; i++) {
symbol1[i] = end1[i];
symbol2[i] = end2[i];
}
FillSymbolLine(symbol1);
FillSymbolLine(symbol2);
// Now actually draw the planet glyphs.
for (i = 0; i <= is.nObj*2+1; i++) {
j = i >> 1;
if (FProper(j)) {
if ((gi.xTurtle = (int)symbol1[i]) > 0 && gs.fLabel &&
!ignorez[FOdd(i) ? arDes : arIC]) {
DrawColor(ret[j] < 0.0 ? gi.kiGray : gi.kiOn);
DrawDash((int)end1[i], y2-unit*2, (int)symbol1[i], y2-unit*4,
(ret[i] < 0.0 ? 1 : 0) - gs.fColor);
DrawObject(j, gi.xTurtle, y2-unit*10);
}
if ((gi.xTurtle = (int)symbol2[i]) > 0 && gs.fLabel &&
!ignorez[FOdd(i) ? arAsc : arMC]) {
DrawColor(ret[j] < 0.0 ? gi.kiGray : gi.kiOn);
DrawDash((int)end2[i], y1+unit*4, (int)symbol2[i], y1+unit*8,
(ret[i] < 0.0 ? 1 : 0) - gs.fColor);
DrawObject(j, gi.xTurtle, y1+unit*14);
k = FOdd(i) ? oAsc : oMC;
l = kObjB[k]; kObjB[k] = kObjB[j];
DrawObject(k, (int)symbol2[i], y1+unit*24-gi.nScaleT);
kObjB[k] = l;
}
}
}
}
// Compose a string to display within a graphic aspect grid cell.
KI FormatGridCell(char *sz, int x, int y, int type, flag fWide)
{
char szT[cchSzDef];
int n, d, m, s;
real v;
KI ki = -1;
if (x < 0) {
v = rgpcp[-x-1]->obj[y];
n = SFromZ(v); v = v - ZFromS(n);
} else {
n = grid->n[x][y]; v = grid->v[x][y];
}
*szT = chNull;
s = NAbs((int)(v*3600.0)); m = s/60; d = m/60; m %= 60; s %= 60;
// For aspect cells, print orb in degrees and minutes.
if (type == 1) {
if (n > 0) {
if (us.fDistance && !us.fParallel) {
sprintf(sz, "%c%f", rgchAppSep[us.nAppSep*2 + (v >= 0.0)],
RAbs(v));
sprintf(&sz[fWide ? 8 : 5], "%s", "%");
} else if (us.nDegForm != df360) {
if (fWide)
sprintf(szT, "%02d", s);
sprintf(sz, "%c%d%c%02d'%s", rgchAppSep[us.nAppSep*2 + (v >= 0.0)],
d, chDegL, m, szT);
sz[fWide ? (d >= 100 ? 8 : 9) : (d >= 100 ? 5 : 6)] = chNull;
} else {
sprintf(sz, "%c%f", rgchAppSep[us.nAppSep*2 + (v >= 0.0)], RAbs(v));
sz[fWide ? 8 : 5] = chNull;
}
} else
*sz = chNull;
}
// For midpoint cells, print degrees and minutes.
else if (type == 2 || (type == 0 && us.nDegForm == dfHM)) {
if (us.nDegForm == dfHM) {
sprintf(sz, "%s", SzZodiac((real)((n-1)*30) + v));
sz[3] = sz[4]; sz[4] = sz[5]; sz[5] = 'm';
if (fWide)
sprintf(sz+6, "%s", sz+8);
sz[fWide ? 8 : 6] = chNull;
} else if (us.nDegForm != df360) {
if (fWide)
sprintf(szT, "%02d", s);
sprintf(sz, "%2d%c%02d'%s", d, chDegL, m, szT);
} else
sprintf(sz, fWide ? "%8.5f" : "%5.2f", RAbs(v));
}
// For main diagonal cells, print sign and degree of the planet.
else {
ki = kSignB(n);
if (us.nDegForm != df360) {
if (fWide)
sprintf(szT, "%c%02d", chDegL, m);
sprintf(sz, "%.3s %02d%s", szSignName[n], d, szT);
} else
sprintf(sz, fWide ? "%8.4f" : "%5.1f", RAbs((real)((n-1)*30) + v));
}
return ki;
}
// Draw an aspect and midpoint grid in the window, with planets labeled down
// the diagonal. This chart is done when the -g switch is combined with the
// -X switch. The chart always has a certain number of cells, hence based on
// how the restrictions are set up, there may be blank columns and rows, or
// else only the first number of unrestricted objects will be included.
void XChartGrid(int x0, int y0)
{
char sz[cchSzDef];
int nScale, unit, siz, x, y, i, j, k, i0, j0, ig, jg;
KI c;
nScale = gi.nScale/gi.nScaleT;
unit = CELLSIZE*gi.nScale; siz = gi.nGridCell*unit;
i = us.fSmartCusp; us.fSmartCusp = fFalse;
j = us.objRequire; us.objRequire = -1;
if (!FCreateGrid(gs.fAlt))
return;
us.fSmartCusp = i; us.objRequire = j;
// Loop through each cell in each row and column of grid.
for (y = 1, j0 = -1; y <= gi.nGridCell; y++) {
do {
j0++;
j = rgobjList[j0];
} while (!FProper(j) && j0 <= is.nObj);
DrawColor(gi.kiGray);
DrawDash(x0, y0 + y*unit, x0 + siz, y0 + y*unit, !gs.fColor);
DrawDash(x0 + y*unit, y0, x0 + y*unit, y0 + siz, !gs.fColor);
if (j0 <= is.nObj) for (x = 1, i0 = -1; x <= gi.nGridCell; x++) {
do {
i0++;
i = rgobjList[i0];
} while (!FProper(i) && i0 <= is.nObj);
ig = i; jg = j;
if ((i > j) != (i0 > j0))
SwapN(ig, jg);
if (i0 <= is.nObj) {
gi.xTurtle = x*unit-unit/2;
gi.yTurtle = y*unit-unit/2 - (nScale > 2 ? 5*gi.nScaleT : 0);
k = grid->n[ig][jg];
// If this is an aspect cell, draw glyph of aspect in effect.
if (gs.fAlt ? x > y : x < y) {
if (k) {
DrawColor(c = kAspB[k]);
DrawAspect(k + (NCheckEclipseAny(ig, k, jg, NULL) >
etNone)*cAspect2, x0 + gi.xTurtle, y0 + gi.yTurtle);
}
// If this is a midpoint cell, draw glyph of sign of midpoint.
} else if (gs.fAlt ? x < y : x > y) {
DrawColor(c = kSignB(grid->n[ig][jg]));
DrawSign(grid->n[ig][jg], x0 + gi.xTurtle, y0 + gi.yTurtle);
// For cells on main diagonal, draw glyph of planet.
} else {
if (gs.fLabelAsp) {
DrawColor(kDkBlueB);
DrawBlock(x0 + (x-1)*unit+1, y0 + (y-1)*unit+1,
x0 + x*unit-1, y0 + y*unit-1);
}
DrawColor(gi.kiLite);
DrawEdge(x0 + (x-1)*unit, y0 + (y-1)*unit, x0 + x*unit, y0 + y*unit);
DrawObject(i, x0 + gi.xTurtle, y0 + gi.yTurtle);
}
// When the scale size is 300+, can print text in each cell.
if (nScale > 2 && gs.fLabel) {
// For the aspect portion, print the orb in degrees and minutes.
if (x != y)
c = FormatGridCell(sz, ig, jg, 1 + (gs.fAlt ? x < y : x > y),
nScale > 3 && us.fSeconds);
// For the main diagonal, print degree and sign of each planet.
else
c = FormatGridCell(sz, ig, jg, 0, nScale > 3 && us.fSeconds);
if (c >= 0)
DrawColor(c);
DrawSz(sz, x0 + x*unit-unit/2, y0 + y*unit-3*gi.nScaleT, dtBottom);
}
}
}
}
}
// Translate zodiac position (or other type of coordinates) into chart pixel
// coordinates representing local horizon position, for the rectangular
// -Z -X switch chart.
void PlotHorizon(real lon, real lat, int x1, int y1, int xs, int ys,
int *xp, int *yp)
{
lat = rDegQuad - lat;
*xp = x1 + (int)((real)xs*lon/rDegMax + rRound);
*yp = y1 + (int)((real)ys*lat/rDegHalf + rRound);
}
void LocToHorizon(real lon, real lat, int x1, int y1, int xs, int ys,
int *xp, int *yp)
{
if (!gs.fEcliptic) {
lon = Mod(rDegQuad - lon);
if (us.fRefract)
lat = SwissRefract(lat);
PlotHorizon(lon, lat, x1, y1, xs, ys, xp, yp);
} else {
lon = rDegMax - lon;
CoorXform(&lon, &lat, Lat - rDegQuad);
lon = Mod(cp0.lonMC - lon + rDegQuad);
EquToHorizon(lon, lat, x1, y1, xs, ys, xp, yp);
}
}
void EquToHorizon(real lon, real lat, int x1, int y1, int xs, int ys,
int *xp, int *yp)
{
if (!gs.fEcliptic) {
lon = Mod(cp0.lonMC - lon + rDegQuad);
EquToLocal(&lon, &lat, rDegQuad - Lat);
lon = rDegMax - lon;
LocToHorizon(lon, lat, x1, y1, xs, ys, xp, yp);
} else {
EquToEcl(&lon, &lat);
lon = Mod(Untropical(lon));
EclToHorizon(lon, lat, x1, y1, xs, ys, xp, yp);
}
}
void EclToHorizon(real lon, real lat, int x1, int y1, int xs, int ys,
int *xp, int *yp)
{
if (!gs.fEcliptic) {
lon = Tropical(lon);
EclToEqu(&lon, &lat);
EquToHorizon(lon, lat, x1, y1, xs, ys, xp, yp);
} else
PlotHorizon(lon, lat, x1, y1, xs, ys, xp, yp);
}
void PriToHorizon(real lon, real lat, int x1, int y1, int xs, int ys,
int *xp, int *yp)
{
lon = rDegMax - lon;
CoorXform(&lon, &lat, rDegQuad);
LocToHorizon(lon, lat, x1, y1, xs, ys, xp, yp);
}
void EarToHorizon(real lon, real lat, int x1, int y1, int xs, int ys,
int *xp, int *yp)
{
lon = Mod(lon + rDegHalf);
CoorXform(&lon, &lat, rDegQuad - Lat);
LocToHorizon(Mod(lon - rDegHalf), lat, x1, y1, xs, ys, xp, yp);
}
void EquToHorizon2(real lon, real lat, int x1, int y1, int xs, int ys,
int *xp, int *yp, flag fFlip)
{
if (!fFlip)
EquToHorizon(lon, lat, x1, y1, xs, ys, xp, yp);
else {
EquToEcl(&lon, &lat);
EclToHorizon(rDegMax - lon, lat, x1, y1, xs, ys, xp, yp);
}
}
#define NDashAspect(i, j, asp, orb) (gs.nDashMax >= 0 ? \
NAbs((int)(orb*3600.0)) / (60*60*2) : NAbs((int)(orb*3600.0)) * \
NAbs(gs.nDashMax) / (int)(GetOrb(i, j, asp)*3600.0))
// Draw the local horizon, and draw in the planets where they are at the time
// in question, as done when the -Z is combined with the -X switch.
void XChartHorizon()
{
int cx, cy, unit, x1, y1, x2, y2, xs, ys, xp, yp, i, j, k;
real rT;
ObjDraw rgod[objMax];
char sz[cchSzDef];
flag fHouse3D = !us.fHouse3D, fFlip = gs.fEcliptic && us.rHarmonic < 0.0;
ES es;
#ifdef CONSTEL
int m1, n1, m2, n2, xpT, ypT;
#endif
#ifdef SWISS
ES *pes1, *pes2;
int xp2, yp2;
#endif
unit = Max(12, 6*gi.nScale);
unit = Max(unit, yFontT);
x1 = y1 = unit; x2 = gs.xWin-1-unit; y2 = gs.yWin-1-unit;
xs = x2-x1; ys = y2-y1; cx = (x1+x2)/2; cy = (y1+y2)/2;
// Calculate the local horizon coordinates of each planet. First convert
// zodiac position and declination to zenith longitude and latitude.
ClearB((pbyte)rgod, sizeof(rgod));
for (i = 0; i <= is.nObj; i++) if (FProper(i)) {
EclToHorizon(planet[i], planetalt[i], x1, y1, xs, ys,
&rgod[i].x, &rgod[i].y);
rgod[i].obj = i;
rgod[i].kv = ~0;
rgod[i].f = fTrue;
}
// Draw planet disks (which become visible if large enough).
if (!gs.fAlt)
for (i = 0; i <= is.nObj; i++) if (FProper(i) && i != us.objCenter) {
rT = RObjDiam(i);
if (rT <= 0.0)
continue;
rT = RAtnD((rT / 2.0) / (PtLen(space[i]) * rAUToKm));
j = (int)(rT * (real)xs / rDegMax);
k = (int)(rT * (real)ys / rDegHalf);
if (j > 1 || k > 1) {
DrawColor(kDkGreenB);
DrawCircle2(rgod[i].x, rgod[i].y, j, k);
}
}
// Draw Earth's equator.
if (gs.fEquator) {
DrawColor(kPurpleB);
for (i = 0; i <= nDegMax; i++) {
EquToHorizon((real)i, 0.0, x1, y1, xs, ys, &xp, &yp);
DrawPoint(xp, yp);
}
}
#ifdef CONSTEL
// Draw constellations.
if (gs.fConstel) {
EnumConstelLines(NULL, NULL, NULL, NULL, NULL);
while (EnumConstelLines(&m1, &n1, &m2, &n2, &i)) {
EquToHorizon2((real)(nDegMax-m1), (real)(90-n1), x1, y1, xs, ys,
&xp, &yp, fFlip);
if (i <= 0) {
DrawColor(kPurpleB);
EquToHorizon2((real)(nDegMax-m2), (real)(90-n2), x1, y1, xs, ys,
&xpT, &ypT, fFlip);
DrawWrap(xp, yp, xpT, ypT, x1, x2);
} else {
DrawColor(gi.kiGray);
DrawSz(szCnstlAbbrev[i], xp, yp, dtCent | dtScale2);
}
}
}
#endif
// Draw zodiac sign boundary wedges.
if (us.fIndian) {
if (!gs.fColorSign)
DrawColor(kDkBlueB);
for (i = 0; i < nDegMax; i++) {
if (gs.fColorSign && i%30 == 0) {
k = i/30 + 1;
DrawColor(kSignB(!fFlip ? k : cSign+1 - k));
}
EclToHorizon((real)i, 0.0, x1, y1, xs, ys, &xp, &yp);
DrawPoint(xp, yp);
}
for (i = 0; i < nDegMax; i += 30) {
if (gs.fColorSign) {
k = i/30 + 1;
DrawColor(kSignB(!fFlip ? k : Mod12(cSign+2 - k)));
}
for (j = -90; j <= 90; j++) {
EclToHorizon((real)i, (real)j, x1, y1, xs, ys, &xp, &yp);
DrawPoint(xp, yp);
}
}
k = gi.nScale;
gi.nScale = gi.nScaleTextT;
for (j = -80; j <= 80; j += 160)
for (i = 1; i <= cSign; i++) {
EclToHorizon((real)(i-1)*30.0+15.0, (real)j, x1, y1, xs, ys,
&xp, &yp);
if (gs.fColorSign)
DrawColor(kSignB(!fFlip ? i : cSign+1 - i));
DrawSign(!fFlip ? i : cSign+1 - i, xp, yp);
}
gi.nScale = k;
}
// Draw house boundary wedges.
if (gs.fHouseExtra) {
if (!gs.fColorHouse)
DrawColor(kDkGreenB);
if (fHouse3D) {
for (j = 1; j <= cSign; j++) {
if (!gs.fEcliptic) {
if ((j == sCap && FSameR(chouse[j], is.MC)) ||
(j == sCan && FSameR(chouse[j], Mod(is.MC + rDegHalf))))
continue;
if (us.nHouse3D == hmPrime &&
((j == sAri && FSameR(chouse[j], is.Asc)) ||
(j == sLib && FSameR(chouse[j], Mod(is.Asc + rDegHalf)))))
continue;
if (us.nHouse3D == hmHorizon &&
((j == (Lat >= 0.0 ? sAri : sLib) &&
FSameR(chouse[j], Mod(is.Vtx + rDegHalf))) ||
(j == (Lat >= 0.0 ? sLib : sAri) && FSameR(chouse[j], is.Vtx))))
continue;
}
if (gs.fColorHouse)
DrawColor(kSignB(j));
rT = chouse3[j];
if (us.nHouse3D == hmHorizon)
rT = (rT + rDegQuad) * (Lat < 0.0 ? -1.0 : 1.0) - rDegQuad;
for (i = -89; i < 90; i++) {
if (us.nHouse3D == hmPrime)
PriToHorizon(rT, i, x1, y1, xs, ys, &xp, &yp);
else if (us.nHouse3D == hmHorizon)
LocToHorizon(rT, i, x1, y1, xs, ys, &xp, &yp);
else
EarToHorizon(rT, i, x1, y1, xs, ys, &xp, &yp);
DrawPoint(xp, yp);
}
}
for (i = 1; i <= cSign; i++) {
rT = Midpoint(chouse3[i], chouse3[Mod12(i+1)]);
if (us.nHouse3D == hmPrime)
PriToHorizon(rT, 0.0, x1, y1, xs, ys, &xp, &yp);
else if (us.nHouse3D == hmHorizon) {
rT = (rT + rDegQuad) * (Lat < 0.0 ? -1.0 : 1.0) - rDegQuad;
LocToHorizon(rT, 0.0, x1, y1, xs, ys, &xp, &yp);
} else
EarToHorizon(rT, 0.0, x1, y1, xs, ys, &xp, &yp);
if (gs.fColorHouse)
DrawColor(kSignB(i));
DrawHouse(i, xp, yp);
}
} else {
for (i = 1; i <= cSign; i++) {
if (gs.fColorHouse)
DrawColor(kSignB(SFromZ(chouse[i])));
for (j = -90; j <= 90; j++) {
EclToHorizon(chouse[i], (real)j, x1, y1, xs, ys,
&xp, &yp);
DrawPoint(xp, yp);
}
}
for (j = -75; j <= 75; j += 150)
for (i = 1; i <= cSign; i++) {
EclToHorizon(Midpoint(chouse[i], chouse[Mod12(i+1)]), (real)j,
x1, y1, xs, ys, &xp, &yp);
if (gs.fColorHouse)
DrawColor(kSignB(i));
DrawHouse(i, xp, yp);
}
}
}
// Draw vertical lines dividing our rectangle into four areas. In our
// local space chart, the middle line represents due south, the left line
// due east, the right line due west, and the edges due north. A fourth
// horizontal line divides that which is above and below the horizon.
if (gs.fHouseExtra && fHouse3D && !gs.fEcliptic) {
DrawColor(gs.fColorHouse ? kSignB(sCap) : kDkGreenB);
DrawDash(cx, y1, cx, cy, 1);
DrawColor(gs.fColorHouse ? kSignB(sCan) : kDkGreenB);
DrawDash(cx, cy, cx, y2, 1);
}
if (!(us.fIndian && gs.fEcliptic)) {
DrawColor(gi.kiGray);
if (!(gs.fHouseExtra && fHouse3D && !gs.fEcliptic))
DrawDash(cx, y1, cx, y2, 1);
DrawDash((cx+x1)/2, y1, (cx+x1)/2, y2, 1);
DrawDash((cx+x2)/2, y1, (cx+x2)/2, y2, 1);
}
DrawColor(gi.kiOn);
DrawEdge(x1, y1, x2, y2);
if (!(us.fIndian && gs.fEcliptic)) {
if (gs.fHouseExtra && fHouse3D) {
if (gs.fColorHouse)
DrawColor(kSignB(sAri));
DrawDash(x1, cy, cx, cy, 1);
if (gs.fColorHouse)
DrawColor(kSignB(sLib));
DrawDash(cx, cy, x2, cy, 1);
} else
DrawDash(x1, cy, x2, cy, 1);
}
// Make a slightly smaller rectangle within the window to draw the planets
// in. Make segments on all four edges marking 5 degree increments.
DrawColor(gi.kiLite);
for (i = 5; i < 180; i += 5) {
j = y1+(int)((real)i*(real)ys/rDegHalf);
k = (2+(i%10 == 0)+2*(i%30 == 0))*gi.nScaleT;
DrawLine(x1+1, j, x1+1+k, j);
DrawLine(x2-1, j, x2-1-k, j);
}
for (i = 0; i <= nDegMax; i += 5) {
j = x1+(int)((real)i*(real)xs/rDegMax);
if (i > 0 && i < nDegMax) {
k = (2+(i%10 == 0)+2*(i%30 == 0))*gi.nScaleT;
DrawLine(j, y1+1, j, y1+1+k);
DrawLine(j, y2-1, j, y2-1-k);
}
if (i%90 == 0) {
k = !fFlip ? i : nDegMax-i;
if (!gs.fEcliptic)
sprintf(sz, "%c", *rgszDir[k/90 & 3]);
else if (us.nDegForm == dfZod)
sprintf(sz, "%3.3s", szSignName[Mod12((k / 90)*3 + 1)]);
else if (us.nDegForm == dfHM)
sprintf(sz, "%dh", k/15);
else
sprintf(sz, "%d", k);
DrawSz(sz, j, y1-2*gi.nScaleT, dtBottom | dtScale2);
}
}
#ifdef SWISS
// Draw extra stars.
if (gs.fAllStar) {
DrawColor(gi.kiGray);
SwissComputeStar(0.0, NULL);
while (SwissComputeStar(is.T, &es)) {
EclToHorizon(es.lon, es.lat, x1, y1, xs, ys, &xp, &yp);
DrawStar(xp, yp, &es);
}
// Draw constellation lines between stars.
DrawColor(gi.kiLite);
EnumStarsLines(fTrue, NULL, NULL);
while (EnumStarsLines(fFalse, &pes1, &pes2)) {
EclToHorizon(pes1->lon, pes1->lat, x1, y1, xs, ys, &xp, &yp);
EclToHorizon(pes2->lon, pes2->lat, x1, y1, xs, ys, &xp2, &yp2);
DrawWrap(xp, yp, xp2, yp2, x1, x2);
}
}
// Draw extra asteroids.
if (gs.nAstLo > 0) {
DrawColor(gi.kiGray);
SwissComputeAsteroid(0.0, NULL, fTrue);
while (SwissComputeAsteroid(is.T, &es, fTrue)) {
EclToHorizon(es.lon, es.lat, x1, y1, xs, ys, &xp, &yp);
DrawStar(xp, yp, &es);
}
}
#endif
// Draw exoplanets.
if (gs.fAllExo) {
EnumExoplanets(NULL);
while (EnumExoplanets(&es)) {
EquToEcl(&es.lon, &es.lat);
EclToHorizon(es.lon, es.lat, x1, y1, xs, ys, &xp, &yp);
DrawStar(xp, yp, &es);
}
}
// Draw lines connecting planets which have aspects between them.
if (gs.fLabelCity) {
if (!FCreateGrid(fFalse))
return;
k = gi.nScale;
gi.nScale = gi.nScaleTextT;
for (j = is.nObj; j >= 1; j--)
for (i = j-1; i >= 0; i--)
if (grid->n[i][j] && FProper(i) && FProper(j)) {
DrawColor(kAspB[grid->n[i][j]]);
DrawDash(rgod[i].x, rgod[i].y, rgod[j].x, rgod[j].y,
NDashAspect(i, j, grid->n[i][j], grid->v[i][j]));
if (gs.fLabelAsp)
DrawAspect(grid->n[i][j],
(rgod[i].x + rgod[j].x) >> 1, (rgod[i].y + rgod[j].y) >> 1);
}
gi.nScale = k;
}
// Draw planet glyphs, and spots for actual planet locations.
DrawObjects(rgod, is.nObj+1, unit);
}
// Translate zodiac position (or other type of coordinates) into chart pixel
// coordinates representing local horizon position, for the circular -Z0 -X
// switch chart.
void PlotHorizonSky(real lon, real lat, CONST CIRC *pcr, int *xp, int *yp)
{
real s, x, y, rx, ry;
rx = (real)pcr->xr; ry = (real)pcr->yr;
s = (rDegQuad-lat)/rDegQuad;
if (s > 1.0) {
x = rx * (rSqr2 - 1.0);
y = ry * (rSqr2 - 1.0);
if (lon < 45.0 || lon >= rDegMax-45.0 ||
FBetween(lon, rDegHalf-45.0, rDegHalf+45.0))
s = 1.0 + (s - 1.0) * (((rx + x)/RAbs(RCosD(lon))-rx) / rx);
else if (lon < 135.0 || lon >= rDegMax-135.0)
s = 1.0 + (s - 1.0) * (((ry + y)/RAbs(RCosD(lon-90.0))-ry) / ry);
}
*xp = pcr->xc + (!gs.fEcliptic && FOdd(us.nHorizon) ? -1 : 1) *
(int)(rx*s*RCosD(rDegHalf+lon)+rRound);
*yp = pcr->yc + (!gs.fEcliptic && (us.nHorizon >= 4) ? -1 : 1) *
(int)(ry*s*RSinD(rDegHalf+lon)+rRound);
}
void LocToHorizonSky(real lon, real lat, CONST CIRC *pcr, int *xp, int *yp)
{
if (!gs.fEcliptic) {
if (us.fRefract)
lat = SwissRefract(lat);
PlotHorizonSky(lon, lat, pcr, xp, yp);