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import unittest 

import numpy as np 

import lsst.utils.tests 

 

from lsst.sims.utils import ObservationMetaData 

from lsst.sims.utils import raDecFromAltAz 

from lsst.sims.coordUtils import pixelCoordsFromRaDec 

from lsst.sims.coordUtils import _pixelCoordsFromRaDec 

from lsst.sims.coordUtils import raDecFromPixelCoords 

from lsst.sims.coordUtils import _raDecFromPixelCoords 

from lsst.sims.coordUtils import pupilCoordsFromPixelCoords 

from lsst.sims.coordUtils import pixelCoordsFromPupilCoords 

 

from lsst.sims.GalSimInterface import GalSimCameraWrapper 

from lsst.sims.GalSimInterface import LSSTCameraWrapper 

from lsst.sims.coordUtils import lsst_camera 

 

import lsst.afw.cameraGeom.testUtils as camTestUtils 

from lsst.afw.cameraGeom import FOCAL_PLANE 

from lsst.afw.cameraGeom import TAN_PIXELS, FIELD_ANGLE, PIXELS 

 

from lsst.sims.coordUtils import chipNameFromPupilCoordsLSST 

from lsst.sims.coordUtils import focalPlaneCoordsFromPupilCoordsLSST 

from lsst.sims.coordUtils import pupilCoordsFromFocalPlaneCoordsLSST 

from lsst.sims.coordUtils import pupilCoordsFromPixelCoordsLSST 

from lsst.sims.coordUtils import pixelCoordsFromPupilCoordsLSST 

from lsst.sims.coordUtils import raDecFromPixelCoordsLSST 

from lsst.sims.coordUtils import lsst_camera 

 

from lsst.sims.coordUtils import clean_up_lsst_camera 

 

def setup_module(module): 

lsst.utils.tests.init() 

 

 

class Camera_Wrapper_Test_Class(unittest.TestCase): 

 

longMessage = True 

 

@classmethod 

def tearDownClass(cls): 

clean_up_lsst_camera() 

 

def test_generic_camera_wrapper(self): 

""" 

Test that GalSimCameraWrapper wraps its methods as expected. 

This is mostly to catch changes in afw API. 

""" 

camera = camTestUtils.CameraWrapper().camera 

camera_wrapper = GalSimCameraWrapper(camera) 

 

obs_mjd = ObservationMetaData(mjd=60000.0) 

ra, dec = raDecFromAltAz(35.0, 112.0, obs_mjd) 

obs = ObservationMetaData(pointingRA=ra, pointingDec=dec, 

mjd=obs_mjd.mjd, 

rotSkyPos=22.4) 

 

rng = np.random.RandomState(8124) 

 

for detector in camera: 

name = detector.getName() 

bbox = camera[name].getBBox() 

bbox_wrapper = camera_wrapper.getBBox(name) 

self.assertEqual(bbox.getMinX(), bbox_wrapper.getMinX()) 

self.assertEqual(bbox.getMaxX(), bbox_wrapper.getMaxX()) 

self.assertEqual(bbox.getMinY(), bbox_wrapper.getMinY()) 

self.assertEqual(bbox.getMaxY(), bbox_wrapper.getMaxY()) 

 

center_point = camera[name].getCenter(FOCAL_PLANE) 

pixel_system = camera[name].makeCameraSys(PIXELS) 

center_pix = camera.transform(center_point, FOCAL_PLANE, pixel_system) 

center_pix_wrapper = camera_wrapper.getCenterPixel(name) 

self.assertEqual(center_pix.getX(), center_pix_wrapper.getX()) 

self.assertEqual(center_pix.getY(), center_pix_wrapper.getY()) 

 

pupil_system = camera[name].makeCameraSys(FIELD_ANGLE) 

center_pupil = camera.transform(center_point, FOCAL_PLANE, pupil_system) 

center_pupil_wrapper = camera_wrapper.getCenterPupil(name) 

self.assertEqual(center_pupil.getX(), center_pupil_wrapper.getX()) 

self.assertEqual(center_pupil.getY(), center_pupil_wrapper.getY()) 

 

corner_pupil_wrapper = camera_wrapper.getCornerPupilList(name) 

corner_point_list = camera[name].getCorners(FOCAL_PLANE) 

for point in corner_point_list: 

point_pupil = camera.transform(point, FOCAL_PLANE, pupil_system) 

dd_min = 1.0e10 

for wrapper_point in corner_pupil_wrapper: 

dd = np.sqrt((point_pupil.getX()-wrapper_point.getX())**2 + 

(point_pupil.getY()-wrapper_point.getY())**2) 

 

if dd < dd_min: 

dd_min = dd 

self.assertLess(dd_min, 1.0e-20) 

 

xpix_min = None 

xpix_max = None 

ypix_min = None 

ypix_max = None 

focal_to_tan_pix = camera[name].getTransform(FOCAL_PLANE, TAN_PIXELS) 

for point in corner_point_list: 

pixel_point = focal_to_tan_pix.applyForward(point) 

xx = pixel_point.getX() 

yy = pixel_point.getY() 

if xpix_min is None or xx<xpix_min: 

xpix_min = xx 

if ypix_min is None or yy<ypix_min: 

ypix_min = yy 

if xpix_max is None or xx>xpix_max: 

xpix_max = xx 

if ypix_max is None or yy>ypix_max: 

ypix_max = yy 

 

pix_bounds_wrapper = camera_wrapper.getTanPixelBounds(name) 

self.assertEqual(pix_bounds_wrapper[0], xpix_min) 

self.assertEqual(pix_bounds_wrapper[1], xpix_max) 

self.assertEqual(pix_bounds_wrapper[2], ypix_min) 

self.assertEqual(pix_bounds_wrapper[3], ypix_max) 

 

x_pup = rng.random_sample(10)*0.005-0.01 

y_pup = rng.random_sample(10)*0.005-0.01 

x_pix, y_pix = pixelCoordsFromPupilCoords(x_pup, y_pup, chipName=name, 

camera=camera) 

 

(x_pix_wrapper, 

y_pix_wrapper) = camera_wrapper.pixelCoordsFromPupilCoords(x_pup, y_pup, 

name, obs) 

 

nan_x = np.where(np.isnan(x_pix)) 

self.assertEqual(len(nan_x[0]), 0) 

np.testing.assert_array_equal(x_pix, x_pix_wrapper) 

np.testing.assert_array_equal(y_pix, y_pix_wrapper) 

 

x_pix = rng.random_sample(10)*100.0-200.0 

y_pix = rng.random_sample(10)*100.0-200.0 

x_pup, y_pup = pupilCoordsFromPixelCoords(x_pix, y_pix, chipName=name, 

camera=camera) 

 

(x_pup_wrapper, 

y_pup_wrapper) = camera_wrapper.pupilCoordsFromPixelCoords(x_pix, y_pix, name, 

obs) 

 

nan_x = np.where(np.isnan(x_pup)) 

self.assertEqual(len(nan_x[0]), 0) 

np.testing.assert_array_equal(x_pup, x_pup_wrapper) 

np.testing.assert_array_equal(y_pup, y_pup_wrapper) 

 

ra, dec = raDecFromPixelCoords(x_pix, y_pix, name, camera=camera, 

obs_metadata=obs) 

 

(ra_wrapper, 

dec_wrapper) = camera_wrapper.raDecFromPixelCoords(x_pix, y_pix, name, obs) 

 

nan_ra = np.where(np.isnan(ra)) 

self.assertEqual(len(nan_ra[0]), 0) 

np.testing.assert_array_equal(ra, ra_wrapper) 

np.testing.assert_array_equal(dec, dec_wrapper) 

 

ra, dec = _raDecFromPixelCoords(x_pix, y_pix, name, camera=camera, 

obs_metadata=obs) 

 

(ra_wrapper, 

dec_wrapper) = camera_wrapper._raDecFromPixelCoords(x_pix, y_pix, name, obs) 

 

nan_ra = np.where(np.isnan(ra)) 

self.assertEqual(len(nan_ra[0]), 0) 

np.testing.assert_array_equal(ra, ra_wrapper) 

np.testing.assert_array_equal(dec, dec_wrapper) 

 

ra = obs.pointingRA + (rng.random_sample(10)*50.0-100.0)/60.0 

dec = obs.pointingDec + (rng.random_sample(10)*50.0-100.0)/60.0 

 

x_pix, y_pix = pixelCoordsFromRaDec(ra, dec, chipName=name, camera=camera, 

obs_metadata=obs) 

 

(x_pix_wrapper, 

y_pix_wrapper) = camera_wrapper.pixelCoordsFromRaDec(ra, dec, chipName=name, 

obs_metadata=obs) 

 

nan_x = np.where(np.isnan(x_pix)) 

self.assertEqual(len(nan_x[0]), 0) 

np.testing.assert_array_equal(x_pix, x_pix_wrapper) 

np.testing.assert_array_equal(y_pix, y_pix_wrapper) 

 

ra = np.radians(ra) 

dec = np.radians(dec) 

 

x_pix, y_pix = _pixelCoordsFromRaDec(ra, dec, chipName=name, camera=camera, 

obs_metadata=obs) 

 

(x_pix_wrapper, 

y_pix_wrapper) = camera_wrapper._pixelCoordsFromRaDec(ra, dec, chipName=name, 

obs_metadata=obs) 

 

nan_x = np.where(np.isnan(x_pix)) 

self.assertEqual(len(nan_x[0]), 0) 

np.testing.assert_array_equal(x_pix, x_pix_wrapper) 

np.testing.assert_array_equal(y_pix, y_pix_wrapper) 

 

del camera 

 

def test_LSST_camera_wrapper(self): 

""" 

Test that LSSTCameraWrapper wraps its methods as expected. 

 

Recall that the LSSTCameraWrapper applies the 90 degree rotation 

to go from DM pixel coordinates to Camera team pixel coordinates. 

Namely, 

 

Camera +y = DM +x 

Camera +x = DM -y 

""" 

camera = lsst_camera() 

camera_wrapper = LSSTCameraWrapper() 

 

obs_mjd = ObservationMetaData(mjd=60000.0) 

ra, dec = raDecFromAltAz(35.0, 112.0, obs_mjd) 

obs = ObservationMetaData(pointingRA=ra, pointingDec=dec, 

mjd=obs_mjd.mjd, 

rotSkyPos=22.4, 

bandpassName='u') 

 

rng = np.random.RandomState(8124) 

 

for detector in camera: 

name = detector.getName() 

bbox = camera[name].getBBox() 

bbox_wrapper = camera_wrapper.getBBox(name) 

self.assertEqual(bbox.getMinX(), bbox_wrapper.getMinY()) 

self.assertEqual(bbox.getMaxX(), bbox_wrapper.getMaxY()) 

self.assertEqual(bbox.getMinY(), bbox_wrapper.getMinX()) 

self.assertEqual(bbox.getMaxY(), bbox_wrapper.getMaxX()) 

self.assertGreater(bbox_wrapper.getMaxY()-bbox_wrapper.getMinY(), 

bbox_wrapper.getMaxX()-bbox_wrapper.getMinX()) 

 

center_point = camera[name].getCenter(FOCAL_PLANE) 

pixel_system = camera[name].makeCameraSys(PIXELS) 

center_pix = camera.transform(center_point, FOCAL_PLANE, pixel_system) 

center_pix_wrapper = camera_wrapper.getCenterPixel(name) 

self.assertEqual(center_pix.getX(), center_pix_wrapper.getY()) 

self.assertEqual(center_pix.getY(), center_pix_wrapper.getX()) 

 

# Note that DM and the Camera team agree on the orientation 

# of the pupil coordinate/field angle axes 

pupil_system = camera[name].makeCameraSys(FIELD_ANGLE) 

center_pupil = camera.transform(center_point, FOCAL_PLANE, pupil_system) 

center_pupil_wrapper = camera_wrapper.getCenterPupil(name) 

self.assertEqual(center_pupil.getX(), center_pupil_wrapper.getX()) 

self.assertEqual(center_pupil.getY(), center_pupil_wrapper.getY()) 

 

corner_pupil_wrapper = camera_wrapper.getCornerPupilList(name) 

corner_point_list = camera[name].getCorners(FOCAL_PLANE) 

for point in corner_point_list: 

point_pupil = camera.transform(point, FOCAL_PLANE, pupil_system) 

dd_min = 1.0e10 

for wrapper_point in corner_pupil_wrapper: 

dd = np.sqrt((point_pupil.getX()-wrapper_point.getX())**2 + 

(point_pupil.getY()-wrapper_point.getY())**2) 

 

if dd < dd_min: 

dd_min = dd 

self.assertLess(dd_min, 1.0e-20) 

 

xpix_min = None 

xpix_max = None 

ypix_min = None 

ypix_max = None 

focal_to_tan_pix = camera[name].getTransform(FOCAL_PLANE, TAN_PIXELS) 

for point in corner_point_list: 

pixel_point = focal_to_tan_pix.applyForward(point) 

xx = pixel_point.getX() 

yy = pixel_point.getY() 

if xpix_min is None or xx<xpix_min: 

xpix_min = xx 

if ypix_min is None or yy<ypix_min: 

ypix_min = yy 

if xpix_max is None or xx>xpix_max: 

xpix_max = xx 

if ypix_max is None or yy>ypix_max: 

ypix_max = yy 

 

pix_bounds_wrapper = camera_wrapper.getTanPixelBounds(name) 

self.assertEqual(pix_bounds_wrapper[0], ypix_min) 

self.assertEqual(pix_bounds_wrapper[1], ypix_max) 

self.assertEqual(pix_bounds_wrapper[2], xpix_min) 

self.assertEqual(pix_bounds_wrapper[3], xpix_max) 

 

# generate some random pupil coordinates; 

# verify that the relationship between the DM and Camera team 

# pixel coordinates corresponding to those pupil coordinates 

# is as expected 

x_pup = rng.random_sample(10)*0.005-0.01 

y_pup = rng.random_sample(10)*0.005-0.01 

x_pix, y_pix = pixelCoordsFromPupilCoordsLSST(x_pup, y_pup, chipName=name, 

band=obs.bandpass) 

 

(x_pix_wrapper, 

y_pix_wrapper) = camera_wrapper.pixelCoordsFromPupilCoords(x_pup, y_pup, 

name, obs) 

 

nan_x = np.where(np.isnan(x_pix)) 

self.assertEqual(len(nan_x[0]), 0) 

np.testing.assert_allclose(x_pix-center_pix.getX(), 

y_pix_wrapper-center_pix_wrapper.getY(), 

atol=1.0e-10, rtol=0.0) 

np.testing.assert_allclose(y_pix-center_pix.getY(), 

center_pix_wrapper.getX()-x_pix_wrapper, 

atol=1.0e-10, rtol=0.0) 

 

# use camera_wrapper.pupilCoordsFromPixelCoords to go back to pupil 

# coordinates from x_pix_wrapper, y_pix_wrapper; make sure you get 

# the original pupil coordinates back out 

(x_pup_wrapper, 

y_pup_wrapper) = camera_wrapper.pupilCoordsFromPixelCoords(x_pix_wrapper, 

y_pix_wrapper, 

name, obs) 

msg = 'worst error %e' % np.abs(x_pup-x_pup_wrapper).max() 

np.testing.assert_allclose(x_pup, x_pup_wrapper, atol=1.0e-10, rtol=0.0, err_msg=msg) 

msg = 'worst error %e' % np.abs(y_pup-y_pup_wrapper).max() 

np.testing.assert_allclose(y_pup, y_pup_wrapper, atol=1.0e-10, rtol=0.0, err_msg=msg) 

 

# generate some random sky coordinates; verify that the methods that 

# convert between (RA, Dec) and pixel coordinates behave as expected. 

# NOTE: x_pix, y_pix will be in DM pixel coordinate convention 

x_pix = bbox.getMinX() + rng.random_sample(10)*(bbox.getMaxX()-bbox.getMinX()) 

y_pix = bbox.getMinY() + rng.random_sample(10)*(bbox.getMaxY()-bbox.getMinY()) 

 

ra, dec = raDecFromPixelCoordsLSST(x_pix, y_pix, name, obs_metadata=obs, 

band=obs.bandpass) 

 

(ra_wrapper, 

dec_wrapper) = camera_wrapper.raDecFromPixelCoords(2.0*center_pix.getY()-y_pix, 

x_pix, name, obs) 

 

nan_ra = np.where(np.isnan(ra)) 

self.assertEqual(len(nan_ra[0]), 0) 

np.testing.assert_allclose(ra, ra_wrapper, atol=1.0e-10, rtol=0.0) 

np.testing.assert_allclose(dec, dec_wrapper, atol=1.0e-10, rtol=0.0) 

 

# make sure that the method that returns RA, Dec in radians agrees with 

# the method that returns RA, Dec in degrees 

(ra_rad, 

dec_rad) = camera_wrapper._raDecFromPixelCoords(2.0*center_pix.getY()-y_pix, 

x_pix, name, obs) 

 

np.testing.assert_allclose(np.radians(ra_wrapper), ra_rad, atol=1.0e-10, rtol=0.0) 

np.testing.assert_allclose(np.radians(dec_wrapper), dec_rad, atol=1.0e-10, rtol=0.0) 

 

# Go back to pixel coordinates with pixelCoordsFromRaDec; verify that 

# the result relates to the original DM pixel coordinates as expected 

# (x_pix_inv, y_pix_inv will be in Camera pixel coordinates) 

(x_pix_inv, 

y_pix_inv) = camera_wrapper.pixelCoordsFromRaDec(ra_wrapper, dec_wrapper, 

chipName=name, 

obs_metadata=obs) 

 

np.testing.assert_allclose(y_pix_inv, x_pix, atol=1.0e-4, rtol=0.0) 

np.testing.assert_allclose(x_pix_inv, 2.0*center_pix.getY()-y_pix, atol=1.0e-4, rtol=0.0) 

 

ra = np.radians(ra_wrapper) 

dec = np.radians(dec_wrapper) 

 

# check that the the method that accepts RA, Dec in radians agrees with the 

# method that accepts RA, Dec in degrees 

(x_pix_wrapper, 

y_pix_wrapper) = camera_wrapper._pixelCoordsFromRaDec(ra, dec, chipName=name, 

obs_metadata=obs) 

 

np.testing.assert_allclose(x_pix_inv, x_pix_wrapper, atol=1.0e-10, rtol=0.0) 

np.testing.assert_allclose(y_pix_inv, y_pix_wrapper, atol=1.0e-10, rtol=0.0) 

 

del camera 

del camera_wrapper 

del lsst_camera._lsst_camera 

 

def test_dmPixFromCameraPix(self): 

""" 

Test that the method to return DM pixel coordinates from 

Camera Team pixel coordinates works. 

""" 

camera = lsst_camera() 

camera_wrapper = LSSTCameraWrapper() 

obs = ObservationMetaData(bandpassName='u') 

 

npts = 100 

rng = np.random.RandomState(1824) 

dm_x_pix_list = rng.random_sample(npts)*4000.0 

dm_y_pix_list = rng.random_sample(npts)*4000.0 

name_list = [] 

for det in camera: 

name_list.append(det.getName()) 

chip_name_list = rng.choice(name_list, size=npts) 

 

(xPup_list, 

yPup_list) = pupilCoordsFromPixelCoordsLSST(dm_x_pix_list, 

dm_y_pix_list, 

chipName=chip_name_list, 

band=obs.bandpass) 

 

(cam_x_pix_list, 

cam_y_pix_list) = camera_wrapper.pixelCoordsFromPupilCoords(xPup_list, 

yPup_list, 

chip_name_list, 

obs) 

 

(dm_x_test, 

dm_y_test) = camera_wrapper.dmPixFromCameraPix(cam_x_pix_list, 

cam_y_pix_list, 

chip_name_list) 

 

np.testing.assert_array_almost_equal(dm_x_test, dm_x_pix_list, 

decimal=4) 

np.testing.assert_array_almost_equal(dm_y_test, dm_y_pix_list, 

decimal=4) 

 

# test transformations made one at a time 

for ii in range(len(cam_x_pix_list)): 

dm_x, dm_y = camera_wrapper.dmPixFromCameraPix(cam_x_pix_list[ii], 

cam_y_pix_list[ii], 

chip_name_list[ii]) 

 

self.assertAlmostEqual(dm_x_pix_list[ii], dm_x, 4) 

self.assertAlmostEqual(dm_y_pix_list[ii], dm_y, 4) 

 

# test case where an array of points is on a single chip 

chip_name = chip_name_list[10] 

 

(xPup_list, 

yPup_list) = pupilCoordsFromPixelCoordsLSST(dm_x_pix_list, 

dm_y_pix_list, 

chipName=chip_name, 

band=obs.bandpass) 

 

(cam_x_pix_list, 

cam_y_pix_list) = camera_wrapper.pixelCoordsFromPupilCoords(xPup_list, 

yPup_list, 

chip_name, 

obs) 

 

(dm_x_test, 

dm_y_test) = camera_wrapper.dmPixFromCameraPix(cam_x_pix_list, 

cam_y_pix_list, 

chip_name) 

 

np.testing.assert_array_almost_equal(dm_x_test, dm_x_pix_list, 

decimal=4) 

np.testing.assert_array_almost_equal(dm_y_test, dm_y_pix_list, 

decimal=4) 

 

del camera 

del camera_wrapper 

del lsst_camera._lsst_camera 

 

def test_camPixFromDMpix(self): 

""" 

test that camPixFromDMpix inverts dmPixFromCamPix 

""" 

camera_wrapper = LSSTCameraWrapper() 

rng = np.random.RandomState() 

npts = 200 

cam_x_in = rng.random_sample(npts)*4000.0 

cam_y_in = rng.random_sample(npts)*4000.0 

dm_x, dm_y = camera_wrapper.dmPixFromCameraPix(cam_x_in, cam_y_in, 'R:1,1 S:2,2') 

cam_x, cam_y = camera_wrapper.cameraPixFromDMPix(dm_x, dm_y, 'R:1,1 S:2,2') 

np.testing.assert_array_almost_equal(cam_x_in, cam_x, decimal=10) 

np.testing.assert_array_almost_equal(cam_y_in, cam_y, decimal=10) 

del camera_wrapper 

del lsst_camera._lsst_camera 

 

 

class MemoryTestClass(lsst.utils.tests.MemoryTestCase): 

pass 

 

 

474 ↛ 475line 474 didn't jump to line 475, because the condition on line 474 was never trueif __name__ == "__main__": 

lsst.utils.tests.init() 

unittest.main()