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xcharts1.cpp
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/*
** Astrolog (Version 6.40) File: xcharts1.cpp
**
** IMPORTANT NOTICE: Astrolog and all chart display routines and anything
** not enumerated below used in this program are Copyright (C) 1991-2018 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. 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 (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.
**
** 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 7/22/2018.
*/
#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.fVedic)
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 <= cObj; 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, 0.70, 0.75, 0.80, 0.875);
for (i = 0; i <= cObj; i++) /* Figure out where to put planet glyphs. */
symbol[i] = xplanet[i];
FillSymbolRing(symbol, 1.0);
/* For each planet, draw a small dot indicating where it is, and then */
/* a line from that point to the planet's glyph. */
DrawSymbolRing(symbol, xplanet, ret, cx, cy, unitx, unity,
0.50, 0.52, 0.56, 0.60);
/* Draw lines connecting planets which have aspects between them. */
if (!gs.fAlt) { /* Don't draw aspects in bonus mode. */
if (!FCreateGrid(fFalse))
return;
for (j = cObj; 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(cx+POINT1(unitx, 0.48, PX(xplanet[i])),
cy+POINT1(unity, 0.48, PY(xplanet[i])),
cx+POINT1(unitx, 0.48, PX(xplanet[j])),
cy+POINT1(unity, 0.48, PY(xplanet[j])),
NAbs(grid->v[i][j]/(60*60*2)));
}
}
/* 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,
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 <= cObj*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(kRainbowB[7]);
i = (int)((rDegQuad - Lat)*(real)gi.nScale);
DrawLine(0, i, gs.xWin-1, i);
}
/* Calculate zenith locations of each planet. */
for (i = 0; i <= cObj; i++) if (!ignore[i] || i == oMC) {
planet1[i] = Tropical(i == oMC ? is.MC : 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 <= cObj; i++) if (FProper(i)) {
x = planet1[oMC]-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-2)
j -= (gs.xWin-2);
end1[i*2] = (real)j;
DrawColor(kElemB[eWat]);
DrawLine(j, y1+unit*2, j, y2-unit*2);
}
}
/* Now, normally, unless we are in bonus chart mode, we will go on to draw */
/* the Ascendant and Descendant lines here. */
longm = Mod(planet1[oMC] + lon);
if (!gs.fAlt && (!ignorez[arAsc] || !ignorez[arDes]))
for (i = 1; i <= cObj; i++) if (FProper(i)) {
xold1 = xold2 = nNegative;
/* Hack: Normally we draw the Ascendant and Descendant line segments */
/* simultaneously. However, for the PostScript and metafile vector */
/* graphics, this will cause the file to get inordinately large due */
/* to the constant thrashing between the Asc and Desc colors. Hence */
/* for these charts only, we'll do two passes for Asc and Desc. */
fVector = gs.fPS || gs.fMeta;
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);
}
if (lat == (real)lat1) { /* Line segment */
if (!ignorez[arAsc]) /* pointing to */
DrawLine(k, y1, k, y1+unit*4); /* Ascendant. */
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 we start out, a particular planet's */
/* lines haven't appeared yet, i.e. we are scanning at a latitude */
/* where our 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]) {
DrawColor(gi.kiGray);
DrawWrap(xold1, 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]) {
DrawColor(gi.kiGray);
DrawWrap(xold1, 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);
if (lat == (real)lat1) /* Line segment */
DrawLine(k, y1, k, y1+unit*2); /* pointing to */
} /* Descendant. */
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(kMainB[8]);
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. We have 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 we need to place two sets of glyphs, twice. */
for (i = 0; i <= cObj*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 <= cObj*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;
}
}
}
}
/* 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 */
/* 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()
{
char sz[cchSzDef], szT[cchSzDef];
int nScale, unit, siz, x, y, i, j, k, l;
KI c;
nScale = gi.nScale/gi.nScaleT;
unit = CELLSIZE*gi.nScale; siz = gi.nGridCell*unit;
sprintf(szT, "");
i = us.fSmartCusp; us.fSmartCusp = fFalse;
if (!FCreateGrid(gs.fAlt))
return;
us.fSmartCusp = i;
/* Loop through each cell in each row and column of grid. */
for (y = 1, j = oEar-1; y <= gi.nGridCell; y++) {
do {
j++;
} while (!FProper(j) && j <= cObj);
DrawColor(gi.kiGray);
DrawDash(0, y*unit, siz, y*unit, !gs.fColor);
DrawDash(y*unit, 0, y*unit, siz, !gs.fColor);
if (j <= cObj) for (x = 1, i = oEar-1; x <= gi.nGridCell; x++) {
do {
i++;
} while (!FProper(i) && i <= cObj);
if (i <= cObj) {
gi.xTurtle = x*unit-unit/2;
gi.yTurtle = y*unit-unit/2 - (nScale > 2 ? 5*gi.nScaleT : 0);
k = grid->n[i][j];
/* 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, gi.xTurtle, 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[i][j]));
DrawSign(grid->n[i][j], gi.xTurtle, gi.yTurtle);
/* For cells on main diagonal, draw glyph of planet. */
} else {
DrawColor(gi.kiLite);
DrawEdge((y-1)*unit, (y-1)*unit, y*unit, y*unit);
DrawObject(i, gi.xTurtle, gi.yTurtle);
}
/* When the scale size is 300+, we can print text in each cell: */
if (nScale > 2 && gs.fLabel) {
l = NAbs(grid->v[i][j]); k = l / 60; l %= 60;
if (nScale > 3 && is.fSeconds)
sprintf(szT, "%s%02d", x == y ? "'" : "", l);
/* For the aspect portion, print the orb in degrees and minutes. */
if (gs.fAlt ? x > y : x < y) {
if (grid->n[i][j]) {
sprintf(sz, "%c%d%c%02d'%s", grid->v[i][j] < 0 ?
(us.fAppSep ? 'a' : '-') : (us.fAppSep ? 's' : '+'),
k/60, chDeg2, k%60, szT);
if (nScale == 3)
sz[7] = chNull;
} else
sprintf(sz, "");
/* For the midpoint portion, print the degrees and minutes. */
} else if (gs.fAlt ? x < y : x > y)
sprintf(sz, "%2d%c%02d'%s", k/60, chDeg2, k%60, szT);
/* For the main diagonal, print degree and sign of each planet. */
else {
c = kSignB(grid->n[i][j]);
sprintf(sz, "%.3s %02d%s", szSignName[grid->n[i][j]], k, szT);
}
DrawColor(c);
DrawSz(sz, x*unit-unit/2, y*unit-3*gi.nScaleT, dtBottom);
}
}
}
}
}
/* Translate zodiac position to 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)
{
*xp = x1 + (int)((real)xs*(Mod(rDegQuad-lon))/rDegMax + rRound);
*yp = y1 + (int)((real)ys*(rDegQuad-lat)/rDegHalf + rRound);
}
void EquToHorizon(real lon, real lat, real lonM, real latM,
int x1, int y1, int xs, int ys, int *xp, int *yp)
{
lon = Mod(lonM - lon + rDegQuad);
EquToLocal(&lon, &lat, rDegQuad - latM);
lon = rDegMax - lon;
PlotHorizon(lon, lat, x1, y1, xs, ys, xp, yp);
}
void EclToHorizon(real lon, real lat, real lonM, real latM,
int x1, int y1, int xs, int ys, int *xp, int *yp)
{
lon = Tropical(lon);
EclToEqu(&lon, &lat);
EquToHorizon(lon, lat, lonM, latM, x1, y1, xs, ys, xp, yp);
}
/* 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 x[objMax], y[objMax], m[objMax], n[objMax],
cx, cy, unit, x1, y1, x2, y2, xs, ys, xp, yp, i, j, k, l;
real lonM, latM, lonH, latH;
char sz[2];
#ifdef SWISS
real lonS, latS, magS;
#endif
unit = Max(12, 6*gi.nScale);
x1 = unit; y1 = unit; x2 = gs.xWin-1-unit; y2 = gs.yWin-1-unit;
unit = 12*gi.nScale;
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. */
lonM = Tropical(is.MC); latM = 0.0;
EclToEqu(&lonM, &latM);
latM = Lat;
for (i = 0; i <= cObj; i++) if (FProper(i)) {
EclToHorizon(planet[i], planetalt[i], lonM, latM, x1, y1, xs, ys,
&x[i], &y[i]);
m[i] = x[i]; n[i] = y[i]+unit/2;
}
/* Draw Earth's equator. */
if (gs.fEquator) {
DrawColor(kRainbowB[7]);
for (i = 0; i <= nDegMax; i++) {
EquToHorizon((real)i, 0.0, lonM, latM, x1, y1, xs, ys, &xp, &yp);
DrawPoint(xp, yp);
}
}
/* Draw sign and house boundaries if 3D house setting is in effect. */
if (us.fVedic) {
/* Draw zodiac sign orange wedges. */
if (!gs.fColorSign)
DrawColor(kMainB[7]);
for (i = 0; i < nDegMax; i++) {
if (gs.fColorSign && i%30 == 0)
DrawColor(kSignB(i/30 + 1));
EclToHorizon((real)i, 0.0, lonM, latM, x1, y1, xs, ys, &xp, &yp);
DrawPoint(xp, yp);
}
for (i = 0; i < nDegMax; i += 30) {
if (gs.fColorSign)
DrawColor(kSignB(i/30 + 1));
for (j = -90; j <= 90; j++) {
EclToHorizon((real)i, (real)j, lonM, latM, x1, y1, xs, ys, &xp, &yp);
DrawPoint(xp, yp);
}
}
k = gi.nScale;
gi.nScale = gi.nScaleText * gi.nScaleT;
for (j = -80; j <= 80; j += 160)
for (i = 1; i <= cSign; i++) {
EclToHorizon((real)(i-1)*30.0+15.0, (real)j, lonM, latM, x1, y1,
xs, ys, &xp, &yp);
if (gs.fColorSign)
DrawColor(kSignB(i));
DrawSign(i, xp, yp);
}
gi.nScale = k;
}
if (gs.fHouseExtra) {
/* Draw house orange wedges. */
if (!gs.fColorHouse)
DrawColor(kMainB[5]);
if (!us.fHouse3D) {
for (j = 2; j <= cSign; j += (j%3 == 0 ? 2 : 1)) {
if (gs.fColorHouse)
DrawColor(kSignB(j));
for (i = 0; i < nDegHalf; i++) {
lonH = (real)(i + !FBetween(j, sCan, sSag)*180); latH = 0.0;
k = (j < sCan ? j-1 : (j < sCap ? j-7 : j-13))*30;
CoorXform(&lonH, &latH, (real)k);
PlotHorizon(Mod(lonH + rDegQuad), latH, x1, y1, xs, ys,
&xp, &yp);
DrawPoint(xp, yp);
}
}
for (i = 1; i <= cSign; i++) {
xp = FBetween(i, sCan, sSag) * nDegHalf;
yp = i < sCan ? 15-30*i : (i < sCap ? 30*i-195 : 375-30*i);
PlotHorizon((real)xp, (real)yp, 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, lonM, latM, 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,
lonM, latM, 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 && !us.fHouse3D) {
DrawColor(gs.fColorHouse ? kSignB(sCap) : kMainB[5]);
DrawDash(cx, y1, cx, cy, 1);
DrawColor(gs.fColorHouse ? kSignB(sCan) : kMainB[5]);
DrawDash(cx, cy, cx, y2, 1);
}
DrawColor(gi.kiGray);
if (!(gs.fHouseExtra && !us.fHouse3D))
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 (gs.fHouseExtra && !us.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);
}
sz[1] = chNull;
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) {
*sz = *szDir[i/90 & 3];
DrawSz(sz, j, y1-2*gi.nScaleT, dtBottom);
}
}
#ifdef SWISS
/* Draw extra stars. */
if (gs.fAllStar) {
DrawColor(gi.kiGray);
for (i = 1; i < cStarSwiss; i++) {
if (!SwissComputeStar(is.T, i, &lonS, &latS, &magS))
break;
EclToHorizon(lonS, latS, lonM, latM, x1, y1, xs, ys, &xp, &yp);
DrawPointStar(xp, yp, magS);
}
}
#endif
/* As in the DrawGlobe() routine, we now determine where to draw the */
/* glyphs in relation to the actual points, so that the glyphs aren't */
/* drawn on top of each other if possible. Again, we assume that we'll */
/* put the glyph right under the point, unless there would be some */
/* overlap and the above position is better off. */
for (i = 0; i <= cObj; i++) if (FProper(i)) {
k = l = gs.xWin+gs.yWin;
for (j = 0; j < i; j++) if (FProper(j)) {
k = Min(k, NAbs(m[i]-m[j])+NAbs(n[i]-n[j]));
l = Min(l, NAbs(m[i]-m[j])+NAbs(n[i]-unit-n[j]));
}
if (k < unit || l < unit)
if (k < l)
n[i] -= unit;
}
for (i = cObj; i >= 0; i--) if (FProper(i)) /* Draw planet's glyph. */
DrawObject(i, m[i], n[i]);
for (i = cObj; i >= 0; i--) if (FProper(i)) {
DrawColor(kObjB[i]);
if (!gs.fAlt || i > oNorm)
DrawPoint(x[i], y[i]); /* Draw small or large dot */
else /* near glyph indicating */
DrawSpot(x[i], y[i]); /* exact local location. */
}
}
/* Translate zodiac position to chart pixel coordinates representing local */
/* horizon position, for the circular -Z0 -X switch chart. */
void PlotHorizonSky(real lon, real lat, int cx, int cy, real rx, real ry,
int *xp, int *yp)
{
real s, x, y;
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 = cx+(int)(rx*s*RCosD(rDegHalf+lon)+rRound);
*yp = cy+(int)(ry*s*RSinD(rDegHalf+lon)+rRound);
}
void EquToHorizonSky(real lon, real lat, real lonM, real latM,
int cx, int cy, real rx, real ry, int *xp, int *yp)
{
lon = Mod(lonM - lon + rDegQuad);
EquToLocal(&lon, &lat, rDegQuad - latM);
lon = rDegMax - lon;
PlotHorizonSky(lon, lat, cx, cy, rx, ry, xp, yp);
}
void EclToHorizonSky(real lon, real lat, real lonM, real latM,
int cx, int cy, real rx, real ry, int *xp, int *yp)
{
lon = Tropical(lon);
EclToEqu(&lon, &lat);
EquToHorizonSky(lon, lat, lonM, latM, cx, cy, rx, ry, xp, yp);
}
/* Draw the local horizon, and draw in the planets where they are at the */
/* time in question. This chart is done when the -Z0 is combined with the */
/* -X switch. This is an identical function to XChartHorizon(); however, */
/* that routine's chart is entered on the horizon and meridian. Here we */
/* center the chart around the center of the sky straight up from the */
/* local horizon, with the horizon itself being an encompassing circle. */
void XChartHorizonSky()
{
int x[objMax], y[objMax], m[objMax], n[objMax],
cx, cy, unit, x1, y1, x2, y2, xs, ys, xp, yp, i, j, k, l;
real lonM, latM, lonH, latH, rx, ry, s;
#ifdef SWISS
real lonS, latS, magS;
#endif
unit = Max(12, 6*gi.nScale);
x1 = unit; y1 = unit; x2 = gs.xWin-1-unit; y2 = gs.yWin-1-unit;
unit = 12*gi.nScale;
xs = x2-x1; ys = y2-y1; cx = (x1+x2)/2; cy = (y1+y2)/2;
rx = (real)xs/2.0/rSqr2; ry = (real)ys/2.0/rSqr2;
/* Calculate the local horizon coordinates of each planet. First convert */
/* zodiac position and declination to zenith longitude and latitude. */
lonM = Tropical(is.MC); latM = 0.0;
EclToEqu(&lonM, &latM);
latM = Lat;
for (i = 0; i <= cObj; i++) if (FProper(i)) {
EclToHorizonSky(planet[i], planetalt[i], lonM, latM, cx, cy, rx, ry,
&x[i], &y[i]);
m[i] = x[i]; n[i] = y[i]+unit/2;
}
/* Draw Earth's equator. */
if (gs.fEquator) {
DrawColor(kRainbowB[7]);
for (i = 0; i <= nDegMax; i++) {
EquToHorizonSky((real)i, 0.0, lonM, latM, cx, cy, rx, ry, &xp, &yp);
DrawPoint(xp, yp);
}
}
/* Draw sign and house boundaries if 3D house setting is in effect. */
if (us.fVedic) {
/* Draw zodiac sign orange wedges. */
if (!gs.fColorSign)
DrawColor(kMainB[7]);
for (i = 0; i < nDegMax; i++) {
if (gs.fColorSign && i%30 == 0)
DrawColor(kSignB(i/30 + 1));
EclToHorizonSky((real)i, 0.0, lonM, latM, cx, cy, rx, ry, &xp, &yp);
DrawPoint(xp, yp);
}
for (i = 0; i < nDegMax; i += 30) {
if (gs.fColorSign)
DrawColor(kSignB(i/30 + 1));
for (j = -90; j <= 90; j++) {
EclToHorizonSky((real)i, (real)j, lonM, latM, cx, cy, rx, ry,
&xp, &yp);
DrawPoint(xp, yp);
}
}
k = gi.nScale;
gi.nScale = gi.nScaleText * gi.nScaleT;
for (j = -80; j <= 80; j += 160)
for (i = 1; i <= cSign; i++) {
EclToHorizonSky((real)(i-1)*30.0+15.0, (real)j, lonM, latM, cx, cy,
rx, ry, &xp, &yp);
if (gs.fColorSign)
DrawColor(kSignB(i));
DrawSign(i, xp, yp);
}
gi.nScale = k;
}
if (gs.fHouseExtra) {
/* Draw house orange wedges. */
if (!gs.fColorHouse)
DrawColor(kMainB[5]);
if (!us.fHouse3D) {
for (j = 2; j <= cSign; j += (j%3 == 0 ? 2 : 1)) {
if (gs.fColorHouse)
DrawColor(kSignB(j));
for (i = 0; i < nDegHalf; i++) {
lonH = (real)(i + !FBetween(j, sCan, sSag)*180); latH = 0.0;
k = (j < sCan ? j-1 : (j < sCap ? j-7 : j-13))*30;
CoorXform(&lonH, &latH, (real)k);
PlotHorizonSky(Mod(lonH + rDegQuad), latH, cx, cy,
rx, ry, &xp, &yp);
DrawPoint(xp, yp);
}
}
for (i = 1; i <= cSign; i++) {
xp = FBetween(i, sCan, sSag) * nDegHalf;
yp = i < sCan ? 15-30*i : (i < sCap ? 30*i-195 : 375-30*i);
PlotHorizonSky((real)xp, (real)yp, cx, cy, rx, ry, &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++) {
EclToHorizonSky(chouse[i], (real)j, lonM, latM, cx, cy, rx, ry,
&xp, &yp);
DrawPoint(xp, yp);
}
}
for (j = -75; j <= 75; j += 150)
for (i = 1; i <= cSign; i++) {
EclToHorizonSky(Midpoint(chouse[i], chouse[Mod12(i+1)]), (real)j,
lonM, latM, cx, cy, rx, ry, &xp, &yp);
if (gs.fColorHouse)
DrawColor(kSignB(i));
DrawHouse(i, xp, yp);
}
}
}
/* Draw a circle in window to indicate horizon line, lines dividing */
/* the window into quadrants to indicate n/s and w/e meridians, and */
/* segments on these lines and the edges marking 5 degree increments. */
DrawColor(gi.kiGray);
DrawDash(cx, y1, cx, y2, 1);
DrawDash(x1, cy, x2, cy, 1);
DrawColor(gi.kiLite);
for (i = -125; i <= 125; i += 5) {
k = (2+(i/10*10 == i ? 1 : 0)+(i/30*30 == i ? 2 : 0))*gi.nScaleT;
s = 1.0/(rDegQuad*rSqr2);
j = cy+(int)(s*ys/2*i);
DrawLine(cx-k, j, cx+k, j);
j = cx+(int)(s*xs/2*i);
DrawLine(j, cy-k, j, cy+k);
}
for (i = 5; i < 55; i += 5) {
k = (2+(i/10*10 == i ? 1 : 0)+(i/30*30 == i ? 2 : 0))*gi.nScaleT;
s = 1.0/(rDegHalf-rDegQuad*rSqr2);
j = (int)(s*ys/2*i);
DrawLine(x1, y1+j, x1+k, y1+j);
DrawLine(x1, y2-j, x1+k, y2-j);
DrawLine(x2, y1+j, x2-k, y1+j);
DrawLine(x2, y2-j, x2-k, y2-j);
j = (int)(s*xs/2*i);
DrawLine(x1+j, y1, x1+j, y1+k);
DrawLine(x2-j, y1, x2-j, y1+k);
DrawLine(x1+j, y2, x1+j, y2-k);
DrawLine(x2-j, y2, x2-j, y2-k);
}
DrawSz("N", cx, y1-2*gi.nScaleT, dtBottom);
DrawSz("E", x1/2, cy+2*gi.nScaleT, dtCent);
DrawSz("W", (gs.xWin+x2)/2, cy+2*gi.nScaleT, dtCent);
if (!gs.fText)
DrawSz("S", cx, gs.yWin-3*gi.nScaleT, dtBottom);
DrawColor(gi.kiOn);
DrawEdge(x1, y1, x2, y2);
DrawCircle(cx, cy, (int)rx, (int)ry);
for (i = 0; i < nDegMax; i += 5) {
k = (2+(i/10*10 == i ? 1 : 0)+(i/30*30 == i ? 2 : 0))*gi.nScaleT;
DrawLine(cx+(int)((rx-k)*RCosD((real)i)), cy+(int)((ry-k)*RSinD((real)i)),
cx+(int)((rx+k)*RCosD((real)i)), cy+(int)((ry+k)*RSinD((real)i)));
}
#ifdef SWISS
/* Draw extra stars. */
if (gs.fAllStar) {
DrawColor(gi.kiGray);
for (i = 1; i < cStarSwiss; i++) {
if (!SwissComputeStar(is.T, i, &lonS, &latS, &magS))
break;
EclToHorizonSky(lonS, latS, lonM, latM, cx, cy, rx, ry, &xp, &yp);
DrawPointStar(xp, yp, magS);
}
}
#endif
/* As in the DrawGlobe() routine, we now determine where to draw the */
/* glyphs in relation to the actual points, so that the glyphs aren't */
/* drawn on top of each other if possible. Again, we assume that we'll */
/* put the glyph right under the point, unless there would be some */
/* overlap and the above position is better off. */
for (i = 0; i <= cObj; i++) if (FProper(i)) {
k = l = gs.xWin+gs.yWin;
for (j = 0; j < i; j++) if (FProper(j)) {
k = Min(k, NAbs(m[i]-m[j])+NAbs(n[i]-n[j]));
l = Min(l, NAbs(m[i]-m[j])+NAbs(n[i]-unit-n[j]));
}
if (k < unit || l < unit)
if (k < l)
n[i] -= unit;
}
for (i = cObj; i >= 0; i--) if (FProper(i)) /* Draw glyph. */
DrawObject(i, m[i], n[i]);
for (i = cObj; i >= 0; i--) if (FProper(i)) {
DrawColor(kObjB[i]);
if (!gs.fAlt || i > oNorm)
DrawPoint(x[i], y[i]); /* Draw small or large dot */
else /* near glyph indicating */
DrawSpot(x[i], y[i]); /* exact local location. */
}
}
/* This is a subprocedure of XChartOrbit(). Adjust the coordinates of a */
/* planet so its distance from the central body is on a logarithmic scale. */
void OrbitPlot(real *pxp, real *pyp, real *pzp, real sz)
{
real xp, yp, zp, rDist;
/* Copy input parameters. Only care about Z-axis in 3D wireframe charts. */
xp = *pxp; yp = *pyp;
zp = pzp != NULL ? *pzp : 0.0;
/* Compute distance, determine ratio, and recompute coordinates. */