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ccd_simulator.cpp
1615 lines (1338 loc) · 51.1 KB
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ccd_simulator.cpp
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/*******************************************************************************
Copyright(c) 2017 Jasem Mutlaq. All rights reserved.
Copyright(c) 2010 Gerry Rozema. All rights reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License version 2 as published by the Free Software Foundation.
.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*******************************************************************************/
#include "ccd_simulator.h"
#include "indicom.h"
#include "stream/streammanager.h"
#include "locale_compat.h"
#include <libnova/julian_day.h>
#include <libastro.h>
#include <cmath>
#include <unistd.h>
#include <sys/types.h>
#include <dirent.h>
#include <sys/stat.h>
#include <algorithm>
static pthread_cond_t cv = PTHREAD_COND_INITIALIZER;
static pthread_mutex_t condMutex = PTHREAD_MUTEX_INITIALIZER;
static std::unique_ptr<CCDSim> ccdsim(new CCDSim());
CCDSim::CCDSim() : INDI::FilterInterface(this)
{
currentRA = RA;
currentDE = Dec;
terminateThread = false;
time(&RunStart);
// Filter stuff
FilterSlotN[0].min = 1;
FilterSlotN[0].max = 8;
}
bool CCDSim::setupParameters()
{
SetCCDParams(SimulatorSettingsNP[SIM_XRES].getValue(),
SimulatorSettingsNP[SIM_YRES].getValue(),
16,
SimulatorSettingsNP[SIM_XSIZE].getValue(),
SimulatorSettingsNP[SIM_YSIZE].getValue());
m_MaxNoise = SimulatorSettingsNP[SIM_NOISE].getValue();
m_SkyGlow = SimulatorSettingsNP[SIM_SKYGLOW].getValue();
m_MaxVal = SimulatorSettingsNP[SIM_MAXVAL].getValue();
m_Bias = OffsetNP[0].getValue();
m_LimitingMag = SimulatorSettingsNP[SIM_LIMITINGMAG].getValue();
m_SaturationMag = SimulatorSettingsNP[SIM_SATURATION].getValue();
// An oag is offset this much from center of scope position (arcminutes);
m_OAGOffset = SimulatorSettingsNP[SIM_OAGOFFSET].getValue();
m_PolarError = SimulatorSettingsNP[SIM_POLAR].getValue();
m_PolarDrift = SimulatorSettingsNP[SIM_POLARDRIFT].getValue();
m_PEPeriod = SimulatorSettingsNP[SIM_PE_PERIOD].getValue();
m_PEMax = SimulatorSettingsNP[SIM_PE_MAX].getValue();
m_TimeFactor = SimulatorSettingsNP[SIM_TIME_FACTOR].getValue();
RotatorAngle = SimulatorSettingsNP[SIM_ROTATION].getValue();
uint32_t nbuf = PrimaryCCD.getXRes() * PrimaryCCD.getYRes() * PrimaryCCD.getBPP() / 8;
PrimaryCCD.setFrameBufferSize(nbuf);
Streamer->setPixelFormat(INDI_MONO, 16);
Streamer->setSize(PrimaryCCD.getXRes(), PrimaryCCD.getYRes());
return true;
}
bool CCDSim::Connect()
{
streamPredicate = 0;
terminateThread = false;
pthread_create(&primary_thread, nullptr, &streamVideoHelper, this);
SetTimer(getCurrentPollingPeriod());
return true;
}
bool CCDSim::Disconnect()
{
pthread_mutex_lock(&condMutex);
streamPredicate = 1;
terminateThread = true;
pthread_cond_signal(&cv);
pthread_mutex_unlock(&condMutex);
return true;
}
const char * CCDSim::getDefaultName()
{
return "CCD Simulator";
}
bool CCDSim::initProperties()
{
INDI::CCD::initProperties();
CaptureFormat format = {"INDI_MONO", "Mono", 16, true};
addCaptureFormat(format);
SimulatorSettingsNP[SIM_XRES].fill("SIM_XRES", "CCD X resolution", "%4.0f", 512, 8192, 512, 1280);
SimulatorSettingsNP[SIM_YRES].fill("SIM_YRES", "CCD Y resolution", "%4.0f", 512, 8192, 512, 1024);
SimulatorSettingsNP[SIM_XSIZE].fill("SIM_XSIZE", "CCD X Pixel Size", "%4.2f", 1, 30, 5, 5.2);
SimulatorSettingsNP[SIM_YSIZE].fill("SIM_YSIZE", "CCD Y Pixel Size", "%4.2f", 1, 30, 5, 5.2);
SimulatorSettingsNP[SIM_MAXVAL].fill("SIM_MAXVAL", "CCD Maximum ADU", "%4.0f", 255, 65000, 1000, 65000);
SimulatorSettingsNP[SIM_SATURATION].fill("SIM_SATURATION", "Saturation Mag", "%4.1f", 0, 20, 1, 1.0);
SimulatorSettingsNP[SIM_LIMITINGMAG].fill("SIM_LIMITINGMAG", "Limiting Mag", "%4.1f", 0, 20, 1, 17.0);
SimulatorSettingsNP[SIM_NOISE].fill("SIM_NOISE", "CCD Noise", "%4.0f", 0, 6000, 500, 10);
SimulatorSettingsNP[SIM_SKYGLOW].fill("SIM_SKYGLOW", "Sky Glow (magnitudes)", "%4.1f", 0, 6000, 500, 19.5);
SimulatorSettingsNP[SIM_OAGOFFSET].fill("SIM_OAGOFFSET", "Oag Offset (arcminutes)", "%4.1f", 0, 6000, 500, 0);
SimulatorSettingsNP[SIM_POLAR].fill("SIM_POLAR", "PAE (arcminutes)", "%4.1f", -600, 600, 100, 0);
SimulatorSettingsNP[SIM_POLARDRIFT].fill("SIM_POLARDRIFT", "PAE Drift (minutes)", "%4.1f", 0, 60, 5, 0);
SimulatorSettingsNP[SIM_PE_PERIOD].fill("SIM_PEPERIOD", "PE Period (seconds)", "%4.1f", 0, 60, 5, 0);
SimulatorSettingsNP[SIM_PE_MAX].fill("SIM_PEMAX", "PE Max (arcsec)", "%4.1f", 0, 6000, 500, 0);
SimulatorSettingsNP[SIM_TIME_FACTOR].fill("SIM_TIME_FACTOR", "Time Factor (x)", "%.2f", 0.01, 100, 10, 1);
SimulatorSettingsNP[SIM_ROTATION].fill("SIM_ROTATION", "CCD Rotation", "%.2f", 0, 360, 10, 0);
SimulatorSettingsNP.fill(getDeviceName(), "SIMULATOR_SETTINGS",
"Settings", SIMULATOR_TAB, IP_RW, 60, IPS_IDLE);
// RGB Simulation
SimulateBayerSP[INDI_ENABLED].fill("INDI_ENABLED", "Enabled", ISS_OFF);
SimulateBayerSP[INDI_DISABLED].fill("INDI_DISABLED", "Disabled", ISS_ON);
SimulateBayerSP.fill(getDeviceName(), "SIMULATE_BAYER", "Bayer", SIMULATOR_TAB, IP_RW,
ISR_1OFMANY, 60, IPS_IDLE);
// Simulate focusing
FocusSimulationNP[SIM_FOCUS_POSITION].fill("SIM_FOCUS_POSITION", "Focus", "%.f", 0.0, 100000.0, 1.0, 36700.0);
FocusSimulationNP[SIM_FOCUS_MAX].fill("SIM_FOCUS_MAX", "Max. Position", "%.f", 0.0, 100000.0, 1.0, 100000.0);
FocusSimulationNP[SIM_SEEING].fill("SIM_SEEING", "Seeing (arcsec)", "%4.2f", 0, 60, 0, 3.5);
FocusSimulationNP.fill(getDeviceName(), "SIM_FOCUSING", "Focus Simulation",
SIMULATOR_TAB, IP_RW, 60, IPS_IDLE);
// Simulate Crash
CrashSP[0].fill("CRASH", "Crash driver", ISS_OFF);
CrashSP.fill(getDeviceName(), "CCD_SIMULATE_CRASH", "Crash", SIMULATOR_TAB, IP_WO,
ISR_ATMOST1, 0, IPS_IDLE);
// Periodic Error
EqPENP[AXIS_RA].fill("RA_PE", "RA (hh:mm:ss)", "%010.6m", 0, 24, 0, 0);
EqPENP[AXIS_DE].fill("DEC_PE", "DEC (dd:mm:ss)", "%010.6m", -90, 90, 0, 0);
EqPENP.fill(getDeviceName(), "EQUATORIAL_PE", "EQ PE", SIMULATOR_TAB, IP_RW, 60,
IPS_IDLE);
// FWHM
auto focuser = ActiveDeviceT[ACTIVE_FOCUSER].text ? ActiveDeviceT[ACTIVE_FOCUSER].text : "";
IUFillNumber(&FWHMN[0], "SIM_FWHM", "FWHM (arcseconds)", "%4.2f", 0, 60, 0, 7.5);
IUFillNumberVector(&FWHMNP, FWHMN, 1, focuser, "FWHM", "FWHM", OPTIONS_TAB, IP_RO, 60, IPS_IDLE);
// Cooler
CoolerSP[INDI_ENABLED].fill("COOLER_ON", "ON", ISS_OFF);
CoolerSP[INDI_DISABLED].fill("COOLER_OFF", "OFF", ISS_ON);
CoolerSP.fill(getDeviceName(), "CCD_COOLER", "Cooler", MAIN_CONTROL_TAB, IP_WO,
ISR_1OFMANY, 0, IPS_IDLE);
// Gain
GainNP[0].fill("GAIN", "value", "%.f", 0, 100, 10, 90);
GainNP.fill(getDeviceName(), "CCD_GAIN", "Gain", MAIN_CONTROL_TAB, IP_RW, 60, IPS_IDLE);
// Offset
OffsetNP[0].fill("OFFSET", "value", "%.f", 0, 6000, 500, 0);
OffsetNP.fill(getDeviceName(), "CCD_OFFSET", "Offset", MAIN_CONTROL_TAB, IP_RW, 60, IPS_IDLE);
// Directory to read images from. This is useful to test real images captured by camera
// For each capture, one file is read (sorted by name) and is sent to client.
DirectoryTP[0].fill("LOCATION", "Location", getenv("HOME"));
DirectoryTP.fill(getDeviceName(), "CCD_DIRECTORY_LOCATION", "Directory", SIMULATOR_TAB, IP_RW, 60, IPS_IDLE);
DirectoryTP.load();
// Toggle Directory Reading. If enabled. The simulator will just read images from the directory and not generate them.
DirectorySP[INDI_ENABLED].fill("INDI_ENABLED", "Enabled", ISS_OFF);
DirectorySP[INDI_DISABLED].fill("INDI_DISABLED", "Disabled", ISS_ON);
DirectorySP.fill(getDeviceName(), "CCD_DIRECTORY_TOGGLE", "Use Dir.", SIMULATOR_TAB, IP_RW, ISR_1OFMANY, 60, IPS_IDLE);
// Resolution
for (uint8_t i = 0; i < Resolutions.size(); i++)
{
std::ostringstream ss;
ss << Resolutions[i].first << " x " << Resolutions[i].second;
ResolutionSP[i].fill(ss.str().c_str(), ss.str().c_str(), i == 0 ? ISS_ON : ISS_OFF);
}
ResolutionSP.fill(getDeviceName(), "CCD_RESOLUTION", "Resolution", SIMULATOR_TAB, IP_RW, ISR_1OFMANY, 60, IPS_IDLE);
auto mount = ActiveDeviceT[ACTIVE_TELESCOPE].text ? ActiveDeviceT[ACTIVE_TELESCOPE].text : "";
#ifdef USE_EQUATORIAL_PE
IDSnoopDevice(mount, "EQUATORIAL_PE");
#else
IDSnoopDevice(mount, "EQUATORIAL_EOD_COORD");
#endif
IDSnoopDevice(focuser, "FWHM");
uint32_t cap = 0;
cap |= CCD_CAN_ABORT;
cap |= CCD_CAN_BIN;
cap |= CCD_CAN_SUBFRAME;
cap |= CCD_HAS_COOLER;
cap |= CCD_HAS_GUIDE_HEAD;
cap |= CCD_HAS_SHUTTER;
cap |= CCD_HAS_ST4_PORT;
cap |= CCD_HAS_STREAMING;
cap |= CCD_HAS_DSP;
#ifdef HAVE_WEBSOCKET
cap |= CCD_HAS_WEB_SOCKET;
#endif
SetCCDCapability(cap);
// This should be called after the initial SetCCDCapability (above)
// as it modifies the capabilities.
setBayerEnabled(m_SimulateBayer);
INDI::FilterInterface::initProperties(FILTER_TAB);
FilterSlotN[0].min = 1;
FilterSlotN[0].max = 8;
addDebugControl();
setDriverInterface(getDriverInterface() | FILTER_INTERFACE);
return true;
}
void CCDSim::setBayerEnabled(bool onOff)
{
if (onOff)
{
SetCCDCapability(GetCCDCapability() | CCD_HAS_BAYER);
IUSaveText(&BayerT[0], "0");
IUSaveText(&BayerT[1], "0");
IUSaveText(&BayerT[2], "RGGB");
}
else
{
SetCCDCapability(GetCCDCapability() & ~CCD_HAS_BAYER);
}
}
void CCDSim::ISGetProperties(const char * dev)
{
INDI::CCD::ISGetProperties(dev);
defineProperty(SimulatorSettingsNP);
defineProperty(EqPENP);
defineProperty(FocusSimulationNP);
defineProperty(SimulateBayerSP);
defineProperty(CrashSP);
}
bool CCDSim::updateProperties()
{
INDI::CCD::updateProperties();
if (isConnected())
{
if (HasCooler())
defineProperty(CoolerSP);
defineProperty(GainNP);
defineProperty(OffsetNP);
defineProperty(DirectoryTP);
defineProperty(DirectorySP);
defineProperty(ResolutionSP);
setupParameters();
if (HasGuideHead())
{
SetGuiderParams(500, 290, 16, 9.8, 12.6);
GuideCCD.setFrameBufferSize(GuideCCD.getXRes() * GuideCCD.getYRes() * 2);
}
// Define the Filter Slot and name properties
INDI::FilterInterface::updateProperties();
}
else
{
if (HasCooler())
deleteProperty(CoolerSP.getName());
deleteProperty(GainNP.getName());
deleteProperty(OffsetNP.getName());
deleteProperty(DirectoryTP);
deleteProperty(DirectorySP);
deleteProperty(ResolutionSP);
INDI::FilterInterface::updateProperties();
}
return true;
}
int CCDSim::SetTemperature(double temperature)
{
TemperatureRequest = temperature;
if (fabs(temperature - TemperatureN[0].value) < 0.1)
{
TemperatureN[0].value = temperature;
return 1;
}
auto isCooling = TemperatureRequest < temperature;
CoolerSP[INDI_ENABLED].setState(isCooling ? ISS_ON : ISS_OFF);
CoolerSP[INDI_DISABLED].setState(isCooling ? ISS_OFF : ISS_ON);
CoolerSP.setState(isCooling ? IPS_BUSY : IPS_IDLE);
CoolerSP.apply();
return 0;
}
bool CCDSim::StartExposure(float duration)
{
// for the simulator, we can just draw the frame now
// and it will get returned at the right time
// by the timer routines
AbortPrimaryFrame = false;
ExposureRequest = duration;
PrimaryCCD.setExposureDuration(duration);
gettimeofday(&ExpStart, nullptr);
// Leave the proper time showing for the draw routines
if (PrimaryCCD.getFrameType() == INDI::CCDChip::LIGHT_FRAME && DirectorySP[INDI_ENABLED].getState() == ISS_ON)
{
if (loadNextImage() == false)
return false;
}
else
DrawCcdFrame(&PrimaryCCD);
// Now compress the actual wait time
ExposureRequest = duration * m_TimeFactor;
InExposure = true;
return true;
}
bool CCDSim::StartGuideExposure(float n)
{
GuideExposureRequest = n;
AbortGuideFrame = false;
GuideCCD.setExposureDuration(n);
DrawCcdFrame(&GuideCCD);
gettimeofday(&GuideExpStart, nullptr);
InGuideExposure = true;
return true;
}
bool CCDSim::AbortExposure()
{
if (!InExposure)
return true;
AbortPrimaryFrame = true;
return true;
}
bool CCDSim::AbortGuideExposure()
{
//IDLog("Enter AbortGuideExposure\n");
if (!InGuideExposure)
return true; // no need to abort if we aren't doing one
AbortGuideFrame = true;
return true;
}
float CCDSim::CalcTimeLeft(timeval start, float req)
{
double timesince;
double timeleft;
struct timeval now
{
0, 0
};
gettimeofday(&now, nullptr);
timesince =
(double)(now.tv_sec * 1000.0 + now.tv_usec / 1000) - (double)(start.tv_sec * 1000.0 + start.tv_usec / 1000);
timesince = timesince / 1000;
timeleft = req - timesince;
return timeleft;
}
void CCDSim::TimerHit()
{
uint32_t nextTimer = getCurrentPollingPeriod();
// No need to reset timer if we are not connected anymore
if (!isConnected())
return;
if (InExposure)
{
if (AbortPrimaryFrame)
{
InExposure = false;
AbortPrimaryFrame = false;
}
else
{
float timeleft;
timeleft = CalcTimeLeft(ExpStart, ExposureRequest);
//IDLog("CCD Exposure left: %g - Request: %g\n", timeleft, ExposureRequest);
if (timeleft < 0)
timeleft = 0;
PrimaryCCD.setExposureLeft(timeleft);
if (timeleft < 1.0)
{
if (timeleft <= 0.001)
{
InExposure = false;
// We don't bin for raw images.
if (DirectorySP[INDI_DISABLED].getState() == ISS_ON)
PrimaryCCD.binFrame();
ExposureComplete(&PrimaryCCD);
}
else
{
// set a shorter timer
nextTimer = timeleft * 1000;
}
}
}
}
if (InGuideExposure)
{
double timeleft = CalcTimeLeft(GuideExpStart, GuideExposureRequest);
if (timeleft < 0)
timeleft = 0;
GuideCCD.setExposureLeft(timeleft);
if (timeleft < 1.0)
{
if (timeleft <= 0.001)
{
InGuideExposure = false;
if (!AbortGuideFrame)
{
GuideCCD.binFrame();
ExposureComplete(&GuideCCD);
if (InGuideExposure)
{
// the call to complete triggered another exposure
timeleft = CalcTimeLeft(GuideExpStart, GuideExposureRequest);
if (timeleft < 1.0)
{
nextTimer = timeleft * 1000;
}
}
}
else
{
//IDLog("Not sending guide frame cuz of abort\n");
}
AbortGuideFrame = false;
}
else
{
nextTimer = timeleft * 1000; // set a shorter timer
}
}
}
if (TemperatureNP.s == IPS_BUSY)
{
if (TemperatureRequest < TemperatureN[0].value)
TemperatureN[0].value = std::max(TemperatureRequest, TemperatureN[0].value - 0.5);
else
TemperatureN[0].value = std::min(TemperatureRequest, TemperatureN[0].value + 0.5);
if (std::abs(TemperatureN[0].value - m_LastTemperature) > 0.1)
{
m_LastTemperature = TemperatureN[0].value;
IDSetNumber(&TemperatureNP, nullptr);
}
// Above 20, cooler is off
if (TemperatureN[0].value >= 20)
{
CoolerSP[INDI_ENABLED].setState(ISS_OFF);
CoolerSP[INDI_DISABLED].setState(ISS_ON);
CoolerSP.setState(IPS_IDLE);
CoolerSP.apply();
}
}
SetTimer(nextTimer);
}
double CCDSim::flux(double mag) const
{
// The limiting magnitude provides zero ADU whatever the exposure
// The saturation magnitude provides max ADU in one second
double const z = m_LimitingMag;
double const k = 2.5 * log10(m_MaxVal) / (m_LimitingMag - m_SaturationMag);
return pow(10, (z - mag) * k / 2.5);
}
int CCDSim::DrawCcdFrame(INDI::CCDChip * targetChip)
{
// CCD frame is 16 bit data
float exposure_time;
uint16_t * ptr = reinterpret_cast<uint16_t *>(targetChip->getFrameBuffer());
if (targetChip->getXRes() == 500)
exposure_time = GuideExposureRequest * 4;
else if (Streamer->isStreaming())
exposure_time = (ExposureRequest < 1) ? (ExposureRequest * 100) : ExposureRequest * 2;
else
exposure_time = ExposureRequest;
exposure_time *= (1 + sqrt(GainNP[0].getValue()));
auto targetFocalLength = ScopeInfoNP[FOCAL_LENGTH].getValue() > 0 ? ScopeInfoNP[FOCAL_LENGTH].getValue() : snoopedFocalLength;
if (ShowStarField)
{
float PEOffset {0};
float decDrift {0};
// telescope ra in degrees
double rad {0};
// telescope ra in radians
double rar {0};
// telescope dec in radians;
double decr {0};
int nwidth = 0, nheight = 0;
if (m_PEPeriod > 0)
{
double timesince;
time_t now;
time(&now);
// Lets figure out where we are on the pe curve
timesince = difftime(now, RunStart);
// This is our spot in the curve
double PESpot = timesince / m_PEPeriod;
// Now convert to radians
PESpot = PESpot * 2.0 * 3.14159;
PEOffset = m_PEMax * std::sin(PESpot);
// convert to degrees
PEOffset = PEOffset / 3600;
}
// Spin up a set of plate constants that will relate
// ra/dec of stars, to our fictitious ccd layout
// to account for various rotations etc
// we should spin up some plate constants here
// then we can use these constants to rotate and offset
// the standard co-ordinates on each star for drawing
// a ccd frame;
double pa, pb, pc, pd, pe, pf;
// Pixels per radian
double pprx, ppry;
// Scale in arcsecs per pixel
double Scalex;
double Scaley;
// CCD width in pixels
double ccdW = targetChip->getXRes();
// Pixels per radian
pprx = targetFocalLength / targetChip->getPixelSizeX() * 1000;
ppry = targetFocalLength / targetChip->getPixelSizeY() * 1000;
// we do a simple scale for x and y locations
// based on the focal length and pixel size
// focal length in mm, pixels in microns
// JM: 2015-03-17: Using a simpler formula, Scalex and Scaley are in arcsecs/pixel
Scalex = (targetChip->getPixelSizeX() / targetFocalLength) * 206.3;
Scaley = (targetChip->getPixelSizeY() / targetFocalLength) * 206.3;
#if 0
DEBUGF(
INDI::Logger::DBG_DEBUG,
"pprx: %g pixels per radian ppry: %g pixels per radian ScaleX: %g arcsecs/pixel ScaleY: %g arcsecs/pixel",
pprx, ppry, Scalex, Scaley);
#endif
double theta = 270;
if (!std::isnan(RotatorAngle))
theta += RotatorAngle;
if (pierSide == 1)
theta -= 180; // rotate 180 if on East
theta = range360(theta);
// JM: 2015-03-17: Next we do a rotation assuming CW for angle theta
pa = pprx * cos(theta * M_PI / 180.0);
pb = ppry * sin(theta * M_PI / 180.0);
pd = pprx * -sin(theta * M_PI / 180.0);
pe = ppry * cos(theta * M_PI / 180.0);
nwidth = targetChip->getXRes();
pc = nwidth / 2;
nheight = targetChip->getYRes();
pf = nheight / 2;
ImageScalex = Scalex;
ImageScaley = Scaley;
#ifdef USE_EQUATORIAL_PE
if (!usePE)
{
#endif
currentRA = RA;
currentDE = Dec;
if (std::isnan(currentRA))
{
currentRA = 0;
currentDE = 0;
}
INDI::IEquatorialCoordinates epochPos { 0, 0 }, J2000Pos { 0, 0 };
double jd = ln_get_julian_from_sys();
epochPos.rightascension = currentRA;
epochPos.declination = currentDE;
// Convert from JNow to J2000
INDI::ObservedToJ2000(&epochPos, jd, &J2000Pos);
currentRA = J2000Pos.rightascension;
currentDE = J2000Pos.declination;
//LOGF_DEBUG("DrawCcdFrame JNow %f, %f J2000 %f, %f", epochPos.ra, epochPos.dec, J2000Pos.ra, J2000Pos.dec);
//INDI::IEquatorialCoordinates jnpos;
//INDI::J2000toObserved(&J2000Pos, jd, &jnpos);
//LOGF_DEBUG("J2000toObserved JNow %f, %f J2000 %f, %f", jnpos.ra, jnpos.dec, J2000Pos.ra, J2000Pos.dec);
currentDE += guideNSOffset;
currentRA += guideWEOffset;
#ifdef USE_EQUATORIAL_PE
}
#endif
// calc this now, we will use it a lot later
rad = currentRA * 15.0 + PEOffset;
rar = rad * 0.0174532925;
// offsetting the dec by the guide head offset
float cameradec;
cameradec = currentDE + m_OAGOffset / 60;
decr = cameradec * 0.0174532925;
decDrift = (m_PolarDrift * m_PolarError * cos(decr)) / 3.81;
// Add declination drift, if any.
decr += decDrift / 3600.0 * 0.0174532925;
// now lets calculate the radius we need to fetch
double radius = sqrt((Scalex * Scalex * targetChip->getXRes() / 2.0 * targetChip->getXRes() / 2.0) +
(Scaley * Scaley * targetChip->getYRes() / 2.0 * targetChip->getYRes() / 2.0));
// we have radius in arcseconds now
// convert to arcminutes
radius = radius / 60;
#if 0
LOGF_DEBUG("Lookup radius %4.2f", radius);
#endif
// A saturationmag star saturates in one second
// and a limitingmag produces a one adu level in one second
// solve for zero point and system gain
//k = (m_SaturationMag - m_LimitingMag) / ((-2.5 * log(m_MaxVal)) - (-2.5 * log(1.0 / 2.0)));
//z = m_SaturationMag - k * (-2.5 * log(m_MaxVal));
// Should probably do some math here to figure out the dimmest
// star we can see on this exposure
// and only fetch to that magnitude
// for now, just use the limiting mag number with some room to spare
double lookuplimit = m_LimitingMag;
if (radius > 60)
lookuplimit = 11;
// if this is a light frame, we need a star field drawn
INDI::CCDChip::CCD_FRAME ftype = targetChip->getFrameType();
std::unique_lock<std::mutex> guard(ccdBufferLock);
// Start by clearing the frame buffer
memset(targetChip->getFrameBuffer(), 0, targetChip->getFrameBufferSize());
if (ftype == INDI::CCDChip::LIGHT_FRAME)
{
AutoCNumeric locale;
char gsccmd[250];
FILE * pp;
int drawn = 0;
sprintf(gsccmd, "gsc -c %8.6f %+8.6f -r %4.1f -m 0 %4.2f -n 3000",
range360(rad),
rangeDec(cameradec),
radius,
lookuplimit);
pp = popen(gsccmd, "r");
if (pp != nullptr)
{
char line[256];
int stars = 0;
int lines = 0;
while (fgets(line, 256, pp) != nullptr)
{
// ok, lets parse this line for specifics we want
char id[20];
char plate[6];
char ob[6];
float mag;
float mage;
float ra;
float dec;
float pose;
int band;
float dist;
int dir;
int c;
int rc = sscanf(line, "%10s %f %f %f %f %f %d %d %4s %2s %f %d", id, &ra, &dec, &pose, &mag, &mage,
&band, &c, plate, ob, &dist, &dir);
if (rc == 12)
{
lines++;
stars++;
// Convert the ra/dec to standard co-ordinates
double sx; // standard co-ords
double sy; //
double srar; // star ra in radians
double sdecr; // star dec in radians;
double ccdx;
double ccdy;
srar = ra * 0.0174532925;
sdecr = dec * 0.0174532925;
// Handbook of astronomical image processing
// page 253
// equations 9.1 and 9.2
// convert ra/dec to standard co-ordinates
sx = cos(sdecr) * sin(srar - rar) /
(cos(decr) * cos(sdecr) * cos(srar - rar) + sin(decr) * sin(sdecr));
sy = (sin(decr) * cos(sdecr) * cos(srar - rar) - cos(decr) * sin(sdecr)) /
(cos(decr) * cos(sdecr) * cos(srar - rar) + sin(decr) * sin(sdecr));
// now convert to pixels
ccdx = pa * sx + pb * sy + pc;
ccdy = pd * sx + pe * sy + pf;
// Invert horizontally
ccdx = ccdW - ccdx;
rc = DrawImageStar(targetChip, mag, ccdx, ccdy, exposure_time);
drawn += rc;
#ifdef __DEV__
if (rc == 1)
{
LOGF_DEBUG("star %s scope %6.4f %6.4f star %6.4f %6.4f ccd %6.2f %6.2f", id, rad, decPE, ra, dec, ccdx, ccdy);
LOGF_DEBUG("star %s ccd %6.2f %6.2f", id, ccdx, ccdy);
}
#endif
}
}
pclose(pp);
}
else
{
LOG_ERROR("Error looking up stars, is gsc installed with appropriate environment variables set ??");
}
if (drawn == 0)
{
LOG_ERROR("Got no stars, is gsc installed with appropriate environment variables set ??");
}
}
// now we need to add background sky glow, with vignetting
// this is essentially the same math as drawing a dim star with
// fwhm equivalent to the full field of view
if (ftype == INDI::CCDChip::LIGHT_FRAME || ftype == INDI::CCDChip::FLAT_FRAME)
{
// calculate flux from our zero point and gain values
float glow = m_SkyGlow * 1.3;
if (ftype == INDI::CCDChip::FLAT_FRAME)
{
// Assume flats are done with a diffuser
// in broad daylight, so, the sky magnitude
// is much brighter than at night
glow = m_SkyGlow / 10;
}
// Flux represents one second, scale up linearly for exposure time
float const skyflux = flux(glow) * exposure_time;
uint16_t * pt = reinterpret_cast<uint16_t *>(targetChip->getFrameBuffer());
nheight = targetChip->getSubH();
nwidth = targetChip->getSubW();
for (int y = 0; y < nheight; y++)
{
float const sy = nheight / 2 - y;
for (int x = 0; x < nwidth; x++)
{
float const sx = nwidth / 2 - x;
// Vignetting parameter in arcsec
float const vig = std::min(nwidth, nheight) * ImageScalex;
// Squared distance to center in arcsec (need to make this account for actual pixel size)
float const dc2 = sx * sx * ImageScalex * ImageScalex + sy * sy * ImageScaley * ImageScaley;
// Gaussian falloff to the edges of the frame
float const fa = exp(-2.0 * 0.7 * dc2 / (vig * vig));
// Get the current value of the pixel, add the sky glow and scale for vignetting
float fp = (pt[0] + skyflux) * fa;
// Clamp to limits, store minmax
if (fp > m_MaxVal) fp = m_MaxVal;
if (fp < pt[0]) fp = pt[0];
if (fp > maxpix) maxpix = fp;
if (fp < minpix) minpix = fp;
// And put it back
pt[0] = fp;
pt++;
}
}
}
// Now we add some bias and read noise
int subX = targetChip->getSubX();
int subY = targetChip->getSubY();
int subW = targetChip->getSubW() + subX;
int subH = targetChip->getSubH() + subY;
if (m_MaxNoise > 0)
{
for (int x = subX; x < subW; x++)
{
for (int y = subY; y < subH; y++)
{
int noise;
noise = random();
noise = noise % m_MaxNoise; //
AddToPixel(targetChip, x, y, m_Bias + noise);
}
}
}
}
else
{
testvalue++;
if (testvalue > 255)
testvalue = 0;
uint16_t val = testvalue;
int nbuf = targetChip->getSubW() * targetChip->getSubH();
for (int x = 0; x < nbuf; x++)
{
*ptr = val++;
ptr++;
}
}
return 0;
}
int CCDSim::DrawImageStar(INDI::CCDChip * targetChip, float mag, float x, float y, float exposure_time)
{
int sx, sy;
int drew = 0;
//int boxsizex = 5;
int boxsizey = 5;
float flux;
int subX = targetChip->getSubX();
int subY = targetChip->getSubY();
int subW = targetChip->getSubW() + subX;
int subH = targetChip->getSubH() + subY;
if ((x < subX) || (x > subW || (y < subY) || (y > subH)))
{
// this star is not on the ccd frame anyways
return 0;
}
// calculate flux from our zero point and gain values
flux = this->flux(mag);
// ok, flux represents one second now
// scale up linearly for exposure time
flux = flux * exposure_time;
float qx;
// we need a box size that gives a radius at least 3 times fwhm
qx = seeing / ImageScalex;
qx = qx * 3;
//boxsizex = (int)qx;
//boxsizex++;
qx = seeing / ImageScaley;
qx = qx * 3;
boxsizey = static_cast<int>(qx);
boxsizey++;
//IDLog("BoxSize %d %d\n",boxsizex,boxsizey);
for (sy = -boxsizey; sy <= boxsizey; sy++)
{
for (sx = -boxsizey; sx <= boxsizey; sx++)
{
int rc;
// Squared distance to center in arcsec (need to make this account for actual pixel size)
float const dc2 = sx * sx * ImageScalex * ImageScalex + sy * sy * ImageScaley * ImageScaley;
// Use a gaussian of unitary integral, scale it with the source flux
// f(x) = 1/(sqrt(2*pi)*sigma) * exp( -x² / (2*sigma²) )
// FWHM = 2*sqrt(2*log(2))*sigma => sigma = seeing/(2*sqrt(2*log(2)))
float const sigma = seeing / ( 2 * sqrt(2 * log(2)));
float const fa = 1 / (sigma * sqrt(2 * 3.1416)) * exp( -dc2 / (2 * sigma * sigma));
// The source contribution is the gaussian value, stretched by seeing/FWHM
float fp = fa * flux;
if (fp < 0)
fp = 0;
rc = AddToPixel(targetChip, x + sx, y + sy, fp);
if (rc != 0)
drew = 1;
}
}
return drew;
}
int CCDSim::AddToPixel(INDI::CCDChip * targetChip, int x, int y, int val)
{
int nwidth = targetChip->getSubW();
int nheight = targetChip->getSubH();
x -= targetChip->getSubX();
y -= targetChip->getSubY();
int drew = 0;
if (x >= 0)
{
if (x < nwidth)
{
if (y >= 0)
{
if (y < nheight)
{
unsigned short * pt;
int newval;
drew++;
pt = reinterpret_cast<uint16_t *>(targetChip->getFrameBuffer());
pt += (y * nwidth);
pt += x;