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# 

# LSST Data Management System 

# Copyright 2008-2017 AURA/LSST. 

# 

# This product includes software developed by the 

# LSST Project (http://www.lsst.org/). 

# 

# 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 3 of the License, or 

# (at your option) any later version. 

# 

# This program 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 General Public License for more details. 

# 

# You should have received a copy of the LSST License Statement and 

# the GNU General Public License along with this program. If not, 

# see <http://www.lsstcorp.org/LegalNotices/>. 

# 

 

import unittest 

 

import numpy as np 

 

import lsst.geom 

import lsst.afw.geom 

import lsst.meas.base 

import lsst.utils.tests 

 

 

class ShapeTransformMatrixTestCase(lsst.utils.tests.TestCase): 

 

def testIdentity(self): 

# A no-op coordinate transform translates to a no-op shape transform 

a = lsst.geom.AffineTransform() 

np.testing.assert_array_equal(a.getMatrix(), np.identity(3)) 

m = lsst.meas.base.makeShapeTransformMatrix(a.getLinear()) 

np.testing.assert_array_equal(m, np.identity(3)) 

 

def testVsTransform(self): 

# Transforming an ellipse by multiplying by the matrix should be 

# equivalent to calling its transform() method. 

lt = lsst.geom.LinearTransform.makeRotation(lsst.geom.Angle(np.random.random())) 

e = lsst.afw.geom.Quadrupole(np.random.random(), np.random.random(), 

np.random.random()) 

np.testing.assert_array_almost_equal(np.dot(lsst.meas.base.makeShapeTransformMatrix(lt), 

e.getParameterVector()), 

e.transform(lt).getParameterVector()) 

 

def testVales(self): 

# Test that the analytically-derived correct values are computed 

lt = lsst.geom.LinearTransform(np.random.random((2, 2))) 

m = lsst.meas.base.makeShapeTransformMatrix(lt) 

 

self.assertEqual(m[0, 0], lt[0, 0]*lt[0, 0]) 

self.assertEqual(m[0, 1], lt[0, 1]*lt[0, 1]) 

self.assertEqual(m[0, 2], 2*lt[0, 0]*lt[0, 1]) 

 

self.assertEqual(m[1, 0], lt[1, 0]*lt[1, 0]) 

self.assertEqual(m[1, 1], lt[1, 1]*lt[1, 1]) 

self.assertEqual(m[1, 2], 2*lt[1, 0]*lt[1, 1]) 

 

self.assertEqual(m[2, 0], lt[0, 0]*lt[1, 0]) 

self.assertEqual(m[2, 1], lt[0, 1]*lt[1, 1]) 

self.assertEqual(m[2, 2], lt[0, 0]*lt[1, 1] + lt[0, 1]*lt[1, 0]) 

 

 

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

pass 

 

 

def setup_module(module): 

lsst.utils.tests.init() 

 

 

78 ↛ 79line 78 didn't jump to line 79, because the condition on line 78 was never trueif __name__ == "__main__": 

lsst.utils.tests.init() 

unittest.main()