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Sky.c
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Sky.c
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/*
Sky Window procedure
Since the telescope and horizon views have so much in common wit
the sky window, their dialogue handlers are also in this file.
*/
#include "Sunclock.h"
#include "Project.h"
#define WM_U_UPDATESCOPE (WM_USER + 1) // Update telescope to location picked in sky window
double skyLimitMag = 5.5; // Limiting magnitude of sky map
int skyShowName = TRUE; // Show star names in sky map ?
int telShowName = TRUE; // Show star names in telescope ?
int horShowName = TRUE; // Show star names at horizon ?
double skyNameMag = 2; // Maximum magnitude to show names in sky
double telNameMag = 3.5; // Maximum magnitude to show names in telescope
double horNameMag = 2; // Maximum magnitude to show names at horizon
int skyShowBflam = TRUE; // Show Bayer/Flamsteed numbers in sky ?
int telShowBflam = TRUE; // Show Bayer/Flamsteed numbers in telescope ?
int horShowBflam = TRUE; // Show Bayer/Flamsteed numbers at horizon ?
double skyBflamMag = 2.5; // Maximum magnitude to show Bayer/Flamsteed in sky
double telBflamMag = 4; // Maximum magnitude to show Bayer/Flamsteed in telescope
double horBflamMag = 2.5; // Maximum magnitude to show Bayer/Flamsteed at horizon
int skyShowMag = FALSE; // Show magnitudes in sky ?
int telShowMag = FALSE; // Show magnitudes in telescope ?
int horShowMag = FALSE; // Show magnitudes at horizon ?
double telShowMagMax = -1.5, telShowMagMin = 6; // Telescope show magnitude limits
int skyShowDeep = TRUE; // Show deep sky objects in sky ?
int telShowDeep = TRUE; // Show deep sky objects in telescope ?
int horShowDeep = TRUE; // Show deep sky objects at horizon ?
double skyDeepMag = 2.5; // Maximum magnitude to show deep sky objects in sky
double telDeepMag = 6.5; // Maximum magnitude to show deep sky objects in telescope
double horDeepMag = 2.5; // Maximum magnitude to show deep sky objects at horizon
int telSouthUp = FALSE; // South up in telescope ?
int skyShowConstellations = TRUE; // Show constellations
int skyShowConbounds = TRUE; // Show constellation boundaries ?
int skyShowConnames = TRUE; // Show constellation names ?
int skyAlignConnames = FALSE; // Align constellation names with map boundary ?
int skyShowCoords = TRUE; // Show coordinate grid ?
int skyShowPlanets = TRUE; // Show solar system objects ?
int telShowConstellations = TRUE; // Show constellations in telescope ?
int telShowConbounds = TRUE; // Show constellation boundaries in telescope ?
static int telAlignConnames = FALSE; // Align constellation names ? (Always FALSE for telescope)
int telShowConnames = TRUE; // Show constellation names in telescope ?
int telShowCoords = TRUE; // Show coordinate grid in telescope ?
int telShowPlanets = TRUE; // Show solar system objects in telescope ?
int horShowConstellations = TRUE; // Show constellations at horizon ?
int horShowConbounds = TRUE; // Show constellation boundaries at horizon ?
static int horAlignConnames = FALSE; // Align constellation names ? (Always FALSE for horizon)
int horShowConnames = TRUE; // Show constellation names at horizon ?
int horShowCoords = TRUE; // Show coordinate grid at horizon ?
int horShowPlanets = TRUE; // Show solar system objects at horizon ?
int horShowTerrain = TRUE; // Show terrain at horizon ?
int horShowScenery = TRUE; // Show scenery at horizon ?
double horSceneryRoughness = 0.7; // Fractal dimension of terrain at horizon
char userCat[64] = "-"; // User catalogue file name
int precessionCalculation = PrecAuto; // Precession calculation mode
#pragma pack(1) // starMapData must be byte-packed
struct starMapData {
unsigned short lon;
short lat;
unsigned short mag;
unsigned char spectral;
};
#pragma pack()
static HWND scopeDlg = NULL; // Telescope dialogue window
static HWND horizonDlg = NULL; // Horizon dialogue window
static HINSTANCE starMapLib = 0; // Star map DLL instance handle
static HGLOBAL starMapRes = NULL; // Star map resource global block handle
static HRSRC starMapHandle = NULL; // Star map resource handle
static HBITMAP smbitmap = NULL; // Screen restore bitmap
static int bitmapValid = FALSE; // Is bitmap current ?
static HBITMAP tvbitmap = NULL; // Telescope restore bitmap
static int tvbitmapValid = FALSE; // Is telescope bitmap current ?
static HPALETTE starPal = NULL; // Star colour rendering palette
static HBITMAP hobitmap = NULL; // Horizon bitmap
static int hobitmapValid = FALSE; // Is horizon bitmap current ?
#define Power1FOV 45.0 // Field of view for telescope power 1
int telActive = FALSE; // Telescope active flag
double telra = 0, teldec = 0, telalt = 0, telazi = 0; // Telescope aim point
static double telfov = Power1FOV, telpower = 1, telimag = 5.5; // Telescope settings
static double horfov = 45, horazi = 0, horlimag = 5.5; // Horizon settings
static double skyLham; // Local hour angle offset at last sky map generation
static int Flip = 1; // 1 if Northern hemisphere, -1 if Southern
static double skyLast = -1E10;
static double skyInterval = CalculationInterval(30);
static double skyCalcTime = CalculationInterval(30),
telCalcTime = CalculationInterval(30),
hoCalcTime = CalculationInterval(30);
static int lastSatX = -2000, lastSatY; // Last satellite position in sky
HICON planetIcons[12] = {NULL}; // Solar system object icon handles
static HICON starIcons[9] = {NULL}; // Star stamper icon handles
static HICON deepIcons[10] = {NULL}; // Deep sky object icons
static int pirefc = 0; // Planet icons reference count
static int clientOverheadX, clientOverheadY; /* Window to client overhead in
pixels for resizing */
static BOOL draggingSize = FALSE; // Is user dragging window ?
int starCatalogue = 0; // Star catalogue selection
int starQuality = 0; // Star quality/time tradeoff
int showStarColours = TRUE; // Show star colours ?
static char *starCatResName[] = { // Star catalogue resource names (don't translate these)
"Yale", // 0: Yale bright star catalogue
"Sao" // 1: SAO star database
};
static DLGPROC editReturnProc = NULL, // Special edit control procedures
editTabReturnProc = NULL;
static DLGPROC scopeDlgProc = NULL, // Telescope dialogue procedure
horizonDlgProc = NULL; // Horizon dialogue procedure
#define BrightestMag -1
#define DimmestMag 18
#define BinsPerMag 2
static void updateTelescope(void), updateHorizon(void);
/* LAUNCHSKYWINDOW -- Activate the sky window, if it's not already open. */
void launchSkyWindow(void)
{
if (skyViewPanel == NULL) {
RECT r;
DWORD skyStyle =
WS_CAPTION | // Title and Min/Max
WS_SYSMENU | // Add system menu box
WS_MAXIMIZEBOX | // Add maximise box
WS_MINIMIZEBOX | // Add minimise box
WS_THICKFRAME | // Thick frame: allow resize
WS_CLIPCHILDREN | // don't draw in child windows areas
WS_OVERLAPPED; // this is a conventional overlapped window
r.left = r.top = 0;
r.right = r.bottom = 400;
AdjustWindowRect(&r, skyStyle, TRUE);
clientOverheadX = (r.right - r.left) - 400;
clientOverheadY = (r.bottom - r.top) - 400;
skyViewPanel = CreateWindow(
"SkyWindow", // Window class name
"", // Window's title
skyStyle, // Window style
CW_USEDEFAULT, 0, // Use default X, Y
r.right - r.left, // Window width
r.bottom - r.top, // Window height
NULL, // Parent window's handle
NULL, // Default to Class Menu
hInst, // Instance of window
NULL); // Create struct for WM_CREATE
ShowWindow(skyViewPanel, TRUE); /* Display main window */
}
}
/* LOADPLANETICONS -- Load the planet icons from the resource file. */
void loadPlanetIcons(void)
{
if (pirefc < 1) {
int i;
for (i = 0; i < ELEMENTS(planetIcons); i++) {
planetIcons[i] = LoadIcon(hInst, MAKEINTRESOURCE(IDR_PLANETS + i));
}
for (i = 0; i < ELEMENTS(starIcons); i++) {
starIcons[i] = LoadIcon(hInst, MAKEINTRESOURCE(IDR_STARS + i));
}
for (i = 0; i < ELEMENTS(deepIcons); i++) {
deepIcons[i] = LoadIcon(hInst, MAKEINTRESOURCE(IDR_DEEP + i));
}
}
pirefc++;
}
/* UNLOADPLANETICONS -- Release the planet icons when we're done with them. */
void unloadPlanetIcons(void)
{
pirefc--;
if (pirefc < 1) {
int i;
for (i = 0; i < ELEMENTS(planetIcons); i++) {
DestroyIcon(planetIcons[i]);
planetIcons[i] = NULL;
}
for (i = 0; i < ELEMENTS(starIcons); i++) {
DestroyIcon(starIcons[i]);
starIcons[i] = NULL;
}
for (i = 0; i < ELEMENTS(deepIcons); i++) {
DestroyIcon(deepIcons[i]);
deepIcons[i] = NULL;
}
}
}
/* PAINTSKY -- Paint the sky window. */
#define paintTEL 0 // Telescope
#define paintSKY 1 // Sky
#define paintHOR 2 // Horizon
static HDC hhDC; // Hidden HDC argument to D_movedraw
static int skyMode; // Current window being plotted
static double lham; // Local hour angle in radians
static void calcAltAz(double dec, double ra, double *alt, double *az)
{
double lha = lham - dtr(ra);
*az = fixangle(180 - rtd(atan2(sin(lha), cos(lha) * sin(dtr(siteLat)) -
tan(dtr(dec)) * cos(dtr(siteLat)))));
*alt = rtd(asin(sin(dtr(siteLat)) * sin(dtr(dec)) +
cos(dtr(siteLat)) * cos(dtr(dec)) * cos(lha)));
}
static void altaz(double *dec, double *ra)
{
if (skyMode == paintHOR) {
double rra, rdec;
calcAltAz(*dec, *ra, &rdec, &rra);
*dec = rdec;
*ra = rra;
}
}
void D_movedraw(int xloc1, int yloc1, int xloc2, int yloc2, int line_style)
{
MoveTo(hhDC, xloc1, yloc1);
LineTo(hhDC, xloc2, yloc2);
}
/* Note: plotLine may be used only to plot segments of great circles.
To plot other lines, call clipr_xform() and drawcurveline() yourself
with FALSE great_circle arguments. */
static void plotLine(double fdec, double fra, double tdec, double tra)
{
int vx, vy, vx2, vy2;
double cdec1, cra1, cdec2, cra2;
altaz(&fdec, &fra);
altaz(&tdec, &tra);
if (clipr_xform(fdec, fra, tdec, tra, &vx, &vy, &vx2, &vy2, FALSE,
&cdec1, &cra1, &cdec2, &cra2)) {
drawcurveline(cdec1, cra1, cdec2, cra2, vx, vy, vx2, vy2, 0, TRUE, 0);
}
}
static void paintSky(int skyTel, HDC hDC, RECT *br, double limag)
{
int i, vx, vy, vis, vm, vx2, vy2, smhand = -1, pflip, precess;
void far *smap;
double igmst, ra, dec, mag;
unsigned char smex[4];
#define ST(x, y, z) ((skyTel > 0) ? ((skyTel == paintHOR) ? (z) : (x)) : (y))
#define SorT(x) ST(sky##x, tel##x, hor##x)
hhDC = hDC;
skyMode = skyTel;
if ((precessionCalculation == PrecAlways) ||
((precessionCalculation == PrecAuto) && (abs(PrecEpoch - faketime) >
(PrecYears * 365.25)))) {
definePrecession(2000.0 + ((faketime - PrecEpoch) / 365.25));
precess = TRUE;
} else {
precess = FALSE;
}
#define Prd(x, y) if (precess) { precessObject(x, y, &x, &y); }
if (skyTel == paintSKY) {
igmst = gmst(faketime);
lham = skyLham = dtr((igmst * 15) - siteLon);
skywin.width = br->right - br->left;
skywin.height = br->bottom - br->top;
skywin.x_offset = br->left;
skywin.y_offset = br->top;
skywin.proj_mode = STEREOGR;
pflip = skywin.invert = Flip > 0;
skywin.mirror = !skywin.invert;
igmst = gmst(faketime);
skywin.racen = fixangle((igmst * 15) - siteLon);
skywin.dlcen = siteLat;
skywin.scale = 90.0;
initxform(&skywin);
} else if (skyTel == paintTEL) {
igmst = gmst(faketime);
lham = skyLham = dtr((igmst * 15) - siteLon);
telwin.width = br->right - br->left;
telwin.height = br->bottom - br->top;
telwin.x_offset = br->left;
telwin.y_offset = br->top;
telwin.proj_mode = (telpower > 0.75) ? GNOMONIC : STEREOGR;
pflip = telwin.invert = !telSouthUp;
telwin.mirror = !telwin.invert;
telwin.racen = telra;
telwin.dlcen = teldec;
telwin.scale = Power1FOV / telpower;
initxform(&telwin);
} else {
igmst = gmst(faketime);
lham = skyLham = dtr((igmst * 15) - siteLon);
horwin.width = br->right - br->left;
horwin.height = br->bottom - br->top;
horwin.x_offset = br->left;
horwin.y_offset = br->top;
horwin.proj_mode = GNOMONIC;
pflip = horwin.invert = TRUE;
horwin.mirror = FALSE;
horwin.racen = -horazi;
horwin.dlcen = (horfov / 2 * max(horwin.width, horwin.height)) / horwin.width;
horwin.scale = horfov;
initxform(&horwin);
}
// Draw coordinate grid markers, if requested
if (SorT(ShowCoords)) {
int i, hi;
HPEN cpen, open;
double epsilon, esin, ecos, eqra, eqdec, eqlat, pera, pedec;
HFONT ofont, cfont;
#define tickWid 0.75
cfont = CreateFont(max(15, (br->right - br->left) / 40), 0, 0, 0, FW_NORMAL,
FALSE, FALSE, FALSE, ANSI_CHARSET, OUT_DEFAULT_PRECIS,
CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, VARIABLE_PITCH | FF_SWISS,
NULL);
ofont = SelectObject(hDC, cfont);
SetBkMode(hDC, TRANSPARENT);
SetTextAlign(hDC, TA_CENTER | TA_BASELINE | TA_NOUPDATECP);
SetTextColor(hDC, RGB(0, 128, 128));
open = SelectObject(hDC, (cpen = CreatePen(PS_SOLID, 0, RGB(0, 128, 128))));
for (i = -1; i <= 1; i += 2) {
// Equinoctual colures
plotLine(88.0 * i, 0.0, 90.0 * i, 0.0);
plotLine(88.0 * i, 180.0, 90.0 * i, 180.0);
// Solstitial colures
plotLine(88.0 * i, 90.0, 90.0 * i, 90.0);
plotLine(88.0 * i, 270.0, 90.0 * i, 270.0);
}
#define axform(lat, lon, x, y, in) { double la, lo; la = (lat); lo = (lon); altaz(&la, &lo); \
xform(la, lo, x, y, in); }
// Celestial equator
// hi = skyTel == paintHOR ? 5 : 15;
hi = 15;
for (i = 0; i < 360; i += hi) { // Draw the tick marks at hour angle intervals
char hlab[4];
int vx, vy, vis;
plotLine(0.0, (double) i, 0.0, (double) (i + hi));
plotLine(-tickWid, (double) i, tickWid, (double) i);
if ((i % 15) == 0) {
sprintf(hlab, Format(42), i / 15);
axform(tickWid * (pflip ? 1 : -1), (double) i, &vx, &vy, &vis);
if (vis) {
TextOut(hDC, vx, vy, hlab, strlen(hlab));
}
}
}
SelectObject(hDC, open);
DeleteObject(cpen);
// Ecliptic
open = SelectObject(hDC, (cpen = CreatePen(PS_SOLID, 0, RGB(128, 0, 0))));
epsilon = dtr(obliqeq(faketime)); // Get current obliquity of ecliptic
esin = sin(epsilon);
ecos = cos(epsilon);
SetTextColor(hDC, RGB(128, 0, 0));
pera = pedec = 0.0; // Dirty trick: ecliptic intersects equator at 0 longitude !
for (i = 1; i <= 32; i++) { // Draw the ecliptic itself
eqlat = ((PI * 2) / 32.0) * i;
eqra = fixangle(rtd(atan2(ecos * sin(eqlat), cos(eqlat))));
eqdec = rtd(asin(esin * sin(eqlat)));
plotLine(pedec, pera, eqdec, eqra);
pera = eqra;
pedec = eqdec;
}
for (i = 0; i < 360; i += 15) { // Draw the tick marks at 15 degree intervals
char hlab[6];
int vx, vy, vis;
eqlat = ((PI * 2) / 360.0) * i;
pera = fixangle(rtd(atan2((ecos * sin(eqlat) -
(tan(dtr(-tickWid)) * esin)), cos(eqlat))));
pedec = rtd(asin((esin * sin(eqlat) * cos(dtr(-tickWid))) +
(sin(dtr(-tickWid)) * ecos)));
eqra = fixangle(rtd(atan2((ecos * sin(eqlat) -
(tan(dtr(tickWid)) * esin)), cos(eqlat))));
eqdec = rtd(asin((esin * sin(eqlat) * cos(dtr(tickWid))) +
(sin(dtr(tickWid)) * ecos)));
plotLine(pedec, pera, eqdec, eqra);
sprintf(hlab, Format(43), i);
axform(!pflip ? pedec : eqdec, !pflip ? pera : eqra, &vx, &vy, &vis);
if (vis) {
TextOut(hDC, vx, vy, hlab, strlen(hlab));
}
}
#undef tickWid
SelectObject(hDC, open);
DeleteObject(cpen);
SelectObject(hDC, ofont);
DeleteObject(cfont);
}
// Draw constellation names, if requested
if (SorT(ShowConnames)) {
FILE *fp = fopen(rstring(IDS_CNAMES_FILENAME), "r");
if (fp != NULL) {
char cl[80], cn[80];
char *vfmt = Format(40);
unsigned int tra;
int tdec;
HFONT ofont, cfont;
if (!SorT(AlignConnames)) {
cfont = CreateFont(max(15, (br->right - br->left) / 36), 0, 0, 0, FW_NORMAL,
FALSE, FALSE, FALSE, ANSI_CHARSET, OUT_DEFAULT_PRECIS,
CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, VARIABLE_PITCH | FF_SWISS,
NULL);
ofont = SelectObject(hDC, cfont);
}
SetBkMode(hDC, TRANSPARENT);
SetTextColor(hDC, RGB(255, 255, 0));
SetTextAlign(hDC, TA_CENTER | TA_BASELINE | TA_NOUPDATECP);
while (fgets(cl, sizeof cl, fp) != NULL) {
cl[strlen(cl) - 1] = EOS;
if (strlen(cl) == 0 || isspace(cl[0]) || cl[0] == ';') {
continue;
}
sscanf(cl, vfmt, &tra, &tdec, cn);
if (strchr(cn, '_') != NULL) {
*strchr(cn, '_') = ' ';
}
ra = tra / (24000.0 / 360.0);
dec = tdec / (9000.0 / 90.0);
Prd(ra, dec);
axform(dec, ra, &vx, &vy, &vis);
if (vis) {
if (SorT(AlignConnames)) {
int iangle;
double eangle;
vx2 = vx - (br->left + (br->right - br->left) / 2);
vy2 = vy - (br->top + (br->bottom - br->top) / 2);
if (vx2 == vy2) {
eangle = 0;
} else {
eangle = rtd(atan2((double) vy2, (double) vx2));
if (eangle >= 0) {
eangle -= 90;
} else {
eangle += 90;
}
}
eangle = - eangle;
iangle = (int) (eangle * 10);
cfont = CreateFont(max(15, (br->right - br->left) / 36), 0, iangle, iangle, FW_NORMAL,
FALSE, FALSE, FALSE, ANSI_CHARSET, OUT_DEFAULT_PRECIS,
CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, VARIABLE_PITCH | FF_SWISS,
NULL);
ofont = SelectObject(hDC, cfont);
}
TextOut(hDC, vx, vy, cn, strlen(cn));
if (SorT(AlignConnames)) {
SelectObject(hDC, ofont);
DeleteObject(cfont);
}
}
}
fclose(fp);
if (!SorT(AlignConnames)) {
SelectObject(hDC, ofont);
DeleteObject(cfont);
}
}
}
// Draw constellation outlines, if requested
if (SorT(ShowConstellations)) {
FILE *fp = fopen(rstring(IDS_CONLINE_FILENAME), "r");
if (fp != NULL) {
char cl[80], cn[10];
char *vfmt = Format(36);
unsigned int fra, tra;
int fdec, tdec;
double ra2, dec2, cra1, cdec1, cra2, cdec2;
HPEN cpen, open;
open = SelectObject(hDC, (cpen = CreatePen(PS_SOLID, 0, RGB(128, 128, 128))));
while (fgets(cl, sizeof cl, fp) != NULL) {
cl[strlen(cl) - 1] = EOS;
if (strlen(cl) == 0 || isspace(cl[0]) || cl[0] == ';') {
continue;
}
sscanf(cl, vfmt, cn, &fra, &fdec, &tra, &tdec);
ra = fra / (24000.0 / 360.0);
dec = fdec / (9000.0 / 90.0);
Prd(ra, dec);
ra2 = tra / (24000.0 / 360.0);
dec2 = tdec / (9000.0 / 90.0);
Prd(ra2, dec2);
altaz(&dec, &ra);
altaz(&dec2, &ra2);
if (clipr_xform(dec, ra, dec2, ra2, &vx, &vy, &vx2, &vy2, FALSE,
&cdec1, &cra1, &cdec2, &cra2)) {
MoveTo(hDC, vx, vy);
LineTo(hDC, vx2, vy2);
}
}
SelectObject(hDC, open);
DeleteObject(cpen);
fclose(fp);
}
}
// Draw constellation boundaries, if requested
if (SorT(ShowConbounds)) {
FILE *fp = fopen(rstring(IDS_CONBOUND_FILENAME), "r");
if (fp != NULL) {
char cl[80];
char *vfmt = Format(39);
unsigned int fra, tra;
int mdraw, fdec, tdec;
double ra2, dec2, cra1, cdec1, cra2, cdec2;
HPEN cpen, open;
open = SelectObject(hDC, (cpen = CreatePen(PS_SOLID, 0, RGB(0, 128, 0))));
while (fgets(cl, sizeof cl, fp) != NULL) {
cl[strlen(cl) - 1] = EOS;
if (strlen(cl) == 0 || isspace(cl[0]) || cl[0] == ';') {
continue;
}
sscanf(cl, vfmt, &mdraw, &tra, &tdec);
if (mdraw) {
ra = fra / (24000.0 / 360.0);
dec = fdec / (9000.0 / 90.0);
Prd(ra, dec);
ra2 = tra / (24000.0 / 360.0);
dec2 = tdec / (9000.0 / 90.0);
Prd(ra2, dec2);
if (skyMode == paintHOR) {
int n;
double alt = dec, az = ra, alt2 = dec2, az2 = ra2;
altaz(&alt, &az);
altaz(&alt2, &az2);
if (clipr_xform(alt, az, alt2, az2, &vx, &vy, &vx2, &vy2, FALSE,
&cdec1, &cra1, &cdec2, &cra2)) {
if (ra == ra2) {
// No need to curve great circles
MoveTo(hDC, vx, vy);
LineTo(hDC, vx2, vy2);
} else {
// Make sure we go the short way around the circle
if ((ra - ra2) > 180.0) {
ra = ra - 360.0;
} else if ((ra2 - ra) > 180.0) {
ra2 = ra2 - 360.0;
}
for (n = 0; n < 10; n++) {
alt = dec + n * ((dec2 - dec) / 10);
az = ra + n * ((ra2 - ra) / 10);
alt2 = dec + (n + 1) * ((dec2 - dec) / 10);
az2 = ra + (n + 1) * ((ra2 - ra) / 10);
altaz(&alt, &az);
altaz(&alt2, &az2);
if (clipr_xform(alt, az, alt2, az2, &vx, &vy, &vx2, &vy2, FALSE,
&cdec1, &cra1, &cdec2, &cra2)) {
MoveTo(hDC, vx, vy);
LineTo(hDC, vx2, vy2);
}
}
}
}
} else {
if (clipr_xform(dec, ra, dec2, ra2, &vx, &vy, &vx2, &vy2, FALSE,
&cdec1, &cra1, &cdec2, &cra2)) {
drawcurveline(cdec1, cra1, cdec2, cra2, vx, vy, vx2, vy2, 0, FALSE, 0);
}
}
}
fra = tra;
fdec = tdec;
}
SelectObject(hDC, open);
DeleteObject(cpen);
fclose(fp);
}
}
// Scan the star map and draw the stars
if (starMapLib == NULL || starMapHandle == NULL || starMapRes == NULL) {
smap = NULL;
smhand = -1;
} else {
smap = LockResource(starMapRes);
}
if (smap != NULL || smhand != -1) {
struct starMapData *smp = smap;
int imag, erad;
short ipmra, ipmdec;
unsigned int ilimag;
HFONT ofont, cfont, gfont;
HPEN spen, open;
HBRUSH sbrush, obrush;
HGLOBAL scolourH = NULL;
LPCSTR scolour = NULL;
cfont = CreateFont(max(15, (br->right - br->left) / 40), 0, 0, 0, FW_NORMAL,
FALSE, FALSE, FALSE, ANSI_CHARSET, OUT_DEFAULT_PRECIS,
CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, VARIABLE_PITCH | FF_SWISS,
NULL);
gfont = CreateFont(max(15, (br->right - br->left) / 40), 0, 0, 0, FW_NORMAL,
FALSE, FALSE, FALSE, SYMBOL_CHARSET, OUT_DEFAULT_PRECIS,
CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, VARIABLE_PITCH | FF_SWISS,
rstring(IDS_GREEK_FONTNAME));
ofont = SelectObject(hDC, cfont);
SetBkMode(hDC, TRANSPARENT);
SetTextAlign(hDC, TA_LEFT | TA_BASELINE | TA_NOUPDATECP);
if (showStarColours && starQuality != 2) {
scolourH = LoadResource(hInst, FindResource(hInst, "SColour", "StarCat"));
if (scolourH != NULL) {
scolour = LockResource(scolourH);
}
}
SetTextColor(hDC, RGB(255, 128, 128));
ilimag = (unsigned int) ((limag + 1.5) * 100); // For quick tests against limiting magnitude
while (TRUE) {
char *sname;
memset(smex, 0, sizeof smex);
sname = ((char *) smp) + sizeof(struct starMapData);
if (smp->mag & 0x2000) {
memcpy(smex, sname, 3);
sname += 3;
}
if (smp->mag & 0x1000) {
memcpy(&ipmra, sname, sizeof ipmra);
memcpy(&ipmdec, sname + sizeof ipmra, sizeof ipmdec);
sname += sizeof ipmra + sizeof ipmdec;
} else {
ipmra = ipmdec = 0;
}
ra = smp->lon / (65536.0 / 360.0) +
(((faketime - PrecEpoch) / (JulianCentury / 100)) * (ipmra / (1000.0 * 60 * 60)));
dec = smp->lat / (32767.0 / 90.0) +
(((faketime - PrecEpoch) / (JulianCentury / 100)) * (ipmdec / (1000.0 * 60 * 60)));
Prd(ra, dec);
axform(dec, ra, &vx, &vy, &vis);
if (vis) {
double mbase = 3.5;
mag = ((smp->mag & 0xFFF) / 100.0) - 1.5;
{
int named = FALSE;
/* If star is bright enough to meet the "show name" criterion
and it has a name, display it. */
if ((smp->mag & 0x8000) && SorT(ShowName) && (mag < SorT(NameMag))) {
SelectObject(hDC, cfont);
TextOut(hDC, vx + 8, vy + 2, sname, lstrlen(sname));
named = TRUE;
}
// See if the Bayer/Flamsteed code should be drawn
if ((smex[0] != 0) && SorT(ShowBflam) && (mag < SorT(BflamMag))) {
SelectObject(hDC, smex[0] < 32 ? gfont : cfont);
if (smex[0] < 32) {
smex[0] += ('a' - 1);
}
TextOut(hDC, vx + (named ? -16 : 8), vy + 2,
smex, strlen(smex));
}
// See if the magnitude should be plotted beneath the star
if (SorT(ShowMag) && (mag >= min(telShowMagMin, telShowMagMax)) &&
(mag <= max(telShowMagMin, telShowMagMax))) {
char maggit[20];
int im = sgn(mag) * (int) ((abs(mag) + 0.05) * 10);
UINT ota;
SelectObject(hDC, cfont);
ota = SetTextAlign(hDC, TA_CENTER | TA_TOP | TA_NOUPDATECP);
SetTextColor(hDC, RGB(192, 192, 192));
wsprintf(maggit, "%d", im);
TextOut(hDC, vx, vy + 2, maggit, strlen(maggit));
SetTextAlign(hDC, ota);
}
// Finally, paint the star according to its magnitude and the quality setting
if (starQuality == 0) {
mbase = 4;
erad = 0;
} else if (starQuality == 2) {
imag = ((int) ELEMENTS(starIcons)) - ((int) (mag - BrightestMag));
if (limag < (ELEMENTS(starIcons) - 2)) {
imag -= (ELEMENTS(starIcons) - ((int) limag)) - 1;
}
imag = min(max(imag, 0), ELEMENTS(starIcons) - 1);
DrawIcon(hDC, vx - 16, vy - 16, starIcons[imag]);
} else {
imag = ((int) (mag + 2.5)) - 1;
erad = 6 - imag;
if (erad < 1) {
vm = (int) (255 - (mag - mbase) * (128 / (8 - mbase)));
vm = min(255, max(vm, 32));
if (scolour) {
LPCSTR rgb = scolour + (3 * smp->spectral);
SetPixel(hDC, vx, vy, PALETTERGB((vm * rgb[0]) / 255, (vm * rgb[1]) / 255, (vm * rgb[2]) / 255));
} else {
SetPixel(hDC, vx, vy, RGB(vm, vm, vm));
}
} else {
if (scolour) {
LPCSTR rgb = scolour + (3 * smp->spectral);
sbrush = CreateSolidBrush(PALETTERGB(rgb[0], rgb[1], rgb[2]));
obrush = SelectObject(hDC, sbrush);
spen = CreatePen(PS_SOLID, 0, PALETTERGB(rgb[0], rgb[1], rgb[2]));
open = SelectObject(hDC, spen);
}
Ellipse(hDC, vx - erad, vy - erad, vx + erad, vy + erad);
if (scolour != NULL) {
SelectObject(hDC, obrush);
DeleteObject(sbrush);
SelectObject(hDC, open);
DeleteObject(spen);
}
}
}
}
}
/* Quit if we hit the end of file or exceed the limiting magnitude.
Note the assumption that the catalogue is sorted by magnitude! */
if ((smp->mag & 0x4000) || (((unsigned int) (smp->mag & 0xFFF)) > ilimag)) {
break;
}
if (smap != NULL) {
smp = (struct starMapData *) (sname + ((smp->mag & 0x8000) ? (strlen(sname) + 1) : 0));
}
}
SelectObject(hDC, ofont);
DeleteObject(cfont);
DeleteObject(gfont);
if (smap != NULL) {
UnlockResource(starMapRes);
} else {
_lclose(smhand);
}
if (scolourH != NULL) {
if (scolour != NULL) {
UnlockResource(scolourH);
}
FreeResource(scolourH);
}
}
// Plot deep sky objects, if requested
if (SorT(ShowDeep)) {
FILE *fp = fopen(rstring(IDS_DEEP_FILENAME), "r");
char *dcode = rstring(IDS_DEEP_CODES), *vfmt = Format(41);
HFONT ofont, cfont;
cfont = CreateFont(max(15, (br->right - br->left) / 40), 0, 0, 0, FW_NORMAL,
FALSE, FALSE, FALSE, ANSI_CHARSET, OUT_DEFAULT_PRECIS,
CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, VARIABLE_PITCH | FF_SWISS,
NULL);
ofont = SelectObject(hDC, cfont);
SetBkMode(hDC, TRANSPARENT);
SetTextColor(hDC, PALETTERGB(255, 128, 128));
SetTextAlign(hDC, TA_LEFT | TA_BASELINE | TA_NOUPDATECP);
if (fp != NULL) {
char cl[132], cn[80], dc;
double ra, dec, mag;
while (fgets(cl, sizeof cl, fp) != NULL) {
cl[strlen(cl) - 1] = EOS;
if (strlen(cl) == 0 || isspace(cl[0]) || cl[0] == ';') {
continue;
}
if (sscanf(cl, vfmt, &ra, &dc, &dec, &dc, &mag, &dc, cn) < 7) {
continue;
}
if (mag > SorT(DeepMag)) {
break;
}
Prd(ra, dec);
axform(dec, ra, &vx, &vy, &vis);
if (vis) {
char *objclass, *popname;
int i;
HICON di = NULL;
popname = strchr(cn, ',');
if (popname != NULL) {
*popname++ = EOS;
if ((objclass = strchr(popname, ',')) != NULL) {
*strchr(popname, ',') = EOS;
}
if (objclass != NULL) {
objclass++;
if (strchr(objclass, ',') != NULL) {
*strchr(objclass, ',') = EOS;
}
for (i = 0; i < ELEMENTS(deepIcons); i++) {
if (strncmp(objclass, dcode + (i * 2), 2) == 0) {
di = deepIcons[i];
break;
}
}
if (di != NULL) {
char *dname = strlen(popname) > 0 ? popname : cn;
DrawIcon(hDC, vx - 16, vy - 16, di);
TextOut(hDC, vx + 8, vy + 2, dname, lstrlen(dname));
}
}
}
}
}
SelectObject(hDC, ofont);
DeleteObject(cfont);
fclose(fp);
}
}
// If a user catalogue is selected, plot items in it.
if (userCat[0] != '-') {
FILE *fp = fopen(userCat, "r");
char *dcode;
HFONT ofont, cfont;
HPEN open, cpen;
static COLORREF stdColour[10] = {
RGB(0, 0, 0),
RGB(255, 0, 0),
RGB(255, 255, 0),
RGB(0, 255, 0),
RGB(0, 255, 255),
RGB(0, 0, 255),
RGB(255, 0, 255),
RGB(255, 255, 255),
RGB(192, 192, 192),
RGB(128, 1280, 128)
};
cpen = CreatePen(PS_SOLID, 0, stdColour[7]);
open = SelectObject(hDC, cpen);
cfont = CreateFont(max(15, (br->right - br->left) / 40), 0, 0, 0, FW_NORMAL,
FALSE, FALSE, FALSE, ANSI_CHARSET, OUT_DEFAULT_PRECIS,
CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, VARIABLE_PITCH | FF_SWISS,
NULL);
ofont = SelectObject(hDC, cfont);
SetBkMode(hDC, TRANSPARENT);
SetTextColor(hDC, PALETTERGB(255, 255, 255));
SetTextAlign(hDC, TA_LEFT | TA_TOP | TA_NOUPDATECP);
if (fp != NULL) {
char cl[350], cn[80];
double ra, dec, cra1, cdec1, cra2, cdec2, fromRA, fromDec;
int gotHeader = FALSE, rafield = -1, decfield = -1,
typefield = -1, labelfield = -1, n = 0;
while (fgets(cl, sizeof cl, fp) != NULL) {
cl[strlen(cl) - 1] = EOS;
if (strlen(cl) == 0 || cl[0] == ';') {
continue;
}
CSVscanInit(cl);
if (!gotHeader) {
n = 0;
while (CSVscanField(cn)) {
if (strcmp(cn, rstring(IDS_OC_RA)) == 0) {
rafield = n;
} else if (strcmp(cn, rstring(IDS_OC_DEC)) == 0) {
decfield = n;
} else if (strcmp(cn, rstring(IDS_OC_TYPE)) == 0) {
typefield = n;
} else if (strcmp(cn, rstring(IDS_OC_LABEL)) == 0) {
labelfield = n;
}
n++;
}
// Ditch catalogue if required information isn't present.
if (rafield < 0 || decfield < 0 || (typefield < 0 && labelfield < 0)) {
break;
}
dcode = rstring(IDS_DEEP_CODES);
gotHeader = TRUE;
} else {
char cra[20], cdec[20], ctype[20], clabel[80];
n = 0;
cra[0] = cdec[0] = ctype[0] = clabel[0] = EOS;
while (CSVscanField(cn)) {
if (n == rafield) {
strcpy(cra, cn);
} else if (n == decfield) {
strcpy(cdec, cn);
} else if (n == typefield) {
strcpy(ctype, cn);
} else if (n == labelfield) {
strcpy(clabel, cn);
}
n++;
}
parseRaDec(cra, cdec, &ra, &dec);
Prd(ra, dec);
if (strlen(ctype) > 0) {
int i, f= FALSE;
char *ct = ctype;
while (strlen(ct) > 0) {
// Draw deep space icon if type matches
for (i = 0; i < ELEMENTS(deepIcons); i++) {
if (_strnicmp(ct, dcode + (i * 2), 2) == 0) {
axform(dec, ra, &vx, &vy, &vis);
if (vis) {
DrawIcon(hDC, vx - 16, vy - 16, deepIcons[i]);
}
f = TRUE;
break;
}
}
if (!f) {
char cm[3];
memcpy(cm, ct, 2);
cm[2] = EOS;
if (isalpha(cm[0]) && islower(cm[0])) {
cm[0] = toupper(cm[0]);
}
if (isalpha(cm[1]) && islower(cm[1])) {
cm[1] = toupper(cm[1]);
}
// Sn: Star icon
if (cm[0] == 'S' && isdigit(cm[1])) {