1 // Copyright (C) 2007-2008 CEA/DEN, EDF R&D
3 // This library is free software; you can redistribute it and/or
4 // modify it under the terms of the GNU Lesser General Public
5 // License as published by the Free Software Foundation; either
6 // version 2.1 of the License.
8 // This library is distributed in the hope that it will be useful,
9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 // Lesser General Public License for more details.
13 // You should have received a copy of the GNU Lesser General Public
14 // License along with this library; if not, write to the Free Software
15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
19 #include "TransformedTriangleTest.hxx"
23 using namespace INTERP_KERNEL;
29 * Creates the TransformedTriangle objects used by the tests.
32 void TransformedTriangleTest::setUp()
34 // tri1 -> no unstable double products - no changes brought about by preCalculateDoubleProducts
35 // this allows the testing of calcUnstableT
36 // tri2 -> unstable double products - for testing calcStableC / preCalculateDoubleProducts
38 // triangle to test unstable C and T calculations
39 p1[0] = -1.5 ; p1[1] = 0.5; p1[2] = 0.5;
40 q1[0] = 2.0 ; q1[1] = 0.4; q1[2] = 0.6;
41 r1[0] = 1.0 ; r1[1] = 2.4; r1[2] = 1.2;
42 hp1 = 1 - p1[0] - p1[1] - p1[2];
43 hq1 = 1 - q1[0] - q1[1] - q1[2];
44 hr1 = 1 - r1[0] - r1[1] - r1[2];
45 Hp1 = 1 - p1[0] - p1[1];
46 Hq1 = 1 - q1[0] - q1[1];
47 Hr1 = 1 - r1[0] - r1[1];
49 // std::cout <<std::endl<< "constructing tri1..." << std::endl;
50 tri1 = new TransformedTriangle(p1, q1, r1);
53 // triangle to test stable C calculation
54 const double err = 1.5e-3;
56 p2[0] = 0.000000000084654984189118; p2[1] = -0.000000000000000027536546231654231688873; p2[2] = 0.0000000000000001649875466831349431;
57 q2[0] = -p2[0] +err; q2[1] = -p2[1] + err; q2[2] = -p2[2] +err;
58 r2[0] = 2.01 ; r2[1] = 1.8; r2[2] = 0.92;
60 hp2 = 1 - p2[0] - p2[1] - p2[2];
61 hq2 = 1 - q2[0] - q2[1] - q2[2];
62 hr2 = 1 - r2[0] - r2[1] - r2[2];
63 Hp2 = 1 - p2[0] - p2[1];
64 Hq2 = 1 - q2[0] - q2[1];
65 Hr2 = 1 - r2[0] - r2[1];
67 tri2 = new TransformedTriangle(p2, q2, r2);
74 * Liberates the transformed triangle objects used by the test suite
77 void TransformedTriangleTest::tearDown()
83 /// Tests that _coords has correct values after construction of object is finished
84 /// \brief Status : pass
85 void TransformedTriangleTest::test_constructor() {
86 // test that _coords has correct values after constructor is called
88 double good_values1[15] =
90 p1[0], p1[1], p1[2], hp1, Hp1,
91 q1[0], q1[1], q1[2], hq1, Hq1,
92 r1[0], r1[1], r1[2], hr1, Hr1
95 double good_values2[15] =
97 p2[0], p2[1], p2[2], hp2, Hp2,
98 q2[0], q2[1], q2[2], hq2, Hq2,
99 r2[0], r2[1], r2[2], hr2, Hr2
103 for(int i = 0 ; i < 15 ; ++i)
105 CPPUNIT_ASSERT_DOUBLES_EQUAL(good_values1[i], tri1->_coords[i], ERR_TOL);
106 CPPUNIT_ASSERT_DOUBLES_EQUAL(good_values2[i], tri2->_coords[i], ERR_TOL);
109 CPPUNIT_ASSERT_EQUAL(true, tri1->_is_double_products_calculated);
110 CPPUNIT_ASSERT_EQUAL(true, tri2->_is_double_products_calculated);
113 /// Tests the calculation of double products (without the corrections)
114 /// \brief Status : pass
115 void TransformedTriangleTest::test_calcUnstableC() {
116 typedef TransformedTriangle::TriSegment TriSegment;
118 // test that the correct c-values are calculated
120 double correct_c_vals[24] =
122 p1[0] * q1[1] - p1[1] * q1[0],
123 p1[1] * q1[2] - p1[2] * q1[1],
124 p1[2] * q1[0] - p1[0] * q1[2],
125 p1[0] * hq1 - hp1 * q1[0],
126 p1[1] * hq1 - hp1 * q1[1],
127 p1[2] * hq1 - hp1 * q1[2],
128 Hp1 * q1[0] - p1[0] * Hq1,
129 p1[1] * Hq1 - Hp1 * q1[1],
130 q1[0] * r1[1] - q1[1] * r1[0],
131 q1[1] * r1[2] - q1[2] * r1[1],
132 q1[2] * r1[0] - q1[0] * r1[2],
133 q1[0] * hr1 - hq1 * r1[0],
134 q1[1] * hr1 - hq1 * r1[1],
135 q1[2] * hr1 - hq1 * r1[2],
136 Hq1 * r1[0] - q1[0] * Hr1,
137 q1[1] * Hr1 - Hq1 * r1[1],
138 r1[0]*p1[1]-r1[1]*p1[0],
139 r1[1]*p1[2]-r1[2]*p1[1],
140 r1[2]*p1[0]-r1[0]*p1[2],
141 r1[0] * hp1 - hr1 * p1[0],
142 r1[1] * hp1 - hr1 * p1[1],
143 r1[2] * hp1 - hr1 * p1[2],
144 Hr1 * p1[0] - r1[0] * Hp1,
145 r1[1] * Hp1 - Hr1 * p1[1]
148 double c_vals[3 * 8];
149 for(TriSegment seg = TransformedTriangle::PQ ; seg <= TransformedTriangle::RP ; seg = TriSegment(seg + 1)) {
151 c_vals[seg*8 + 0] = tri1->calcUnstableC(seg, TransformedTriangle::C_XY);
152 c_vals[seg*8 + 1] = tri1->calcUnstableC(seg, TransformedTriangle::C_YZ);
153 c_vals[seg*8 + 2] = tri1->calcUnstableC(seg, TransformedTriangle::C_ZX);
154 c_vals[seg*8 + 3] = tri1->calcUnstableC(seg, TransformedTriangle::C_XH);
155 c_vals[seg*8 + 4] = tri1->calcUnstableC(seg, TransformedTriangle::C_YH);
156 c_vals[seg*8 + 5] = tri1->calcUnstableC(seg, TransformedTriangle::C_ZH);
157 c_vals[seg*8 + 6] = tri1->calcUnstableC(seg, TransformedTriangle::C_01);
158 c_vals[seg*8 + 7] = tri1->calcUnstableC(seg, TransformedTriangle::C_10);
162 for(int i = 0 ; i < 3*8 ; ++i) {
163 CPPUNIT_ASSERT_DOUBLES_EQUAL( correct_c_vals[i], c_vals[i], ERR_TOL );
169 /// Tests the calculation of triple products (without corrections)
170 /// \brief Status : pass
171 void TransformedTriangleTest::test_calcUnstableT()
173 typedef TransformedTriangle::TetraCorner TetraCorner;
175 // correct values calculated by determinants (Grandy, [15])
176 const double correct_t_vals[4] =
178 p1[0]*(q1[1]*r1[2] - q1[2]*r1[1]) -
179 q1[0]*(p1[1]*r1[2] - p1[2]*r1[1]) +
180 r1[0]*(p1[1]*q1[2] - p1[2]*q1[1]),
182 -(hp1*(q1[1]*r1[2] - q1[2]*r1[1]) -
183 hq1*(p1[1]*r1[2] - p1[2]*r1[1]) +
184 hr1*(p1[1]*q1[2] - p1[2]*q1[1])),
186 -(p1[0]*(hq1*r1[2] - q1[2]*hr1) -
187 q1[0]*(hp1*r1[2] - p1[2]*hr1) +
188 r1[0]*(hp1*q1[2] - p1[2]*hq1)),
190 -(p1[0]*(q1[1]*hr1 - r1[1]*hq1) -
191 q1[0]*(p1[1]*hr1 - r1[1]*hp1) +
192 r1[0]*(p1[1]*hq1 - q1[1]*hp1))
196 // test that triple products are correctly calculated
197 for(TetraCorner corner = TransformedTriangle::O ; corner <= TransformedTriangle::Z ; corner = TetraCorner(corner + 1))
200 for(int row = 1 ; row < 4 ; ++row)
202 const double t = tri1->calcTByDevelopingRow(corner, row, false);
203 // std::cout << std::endl << " Corner = " << corner << " Row = " << row << " got: " << t <<
204 // " expected: " << correct_t_vals[corner]<< std::endl;
205 CPPUNIT_ASSERT_DOUBLES_EQUAL(correct_t_vals[corner], t, ERR_TOL);
210 /// Tests the consistency correction
211 /// \brief Status : fails because it is not significant - the consistency correction is not brought into play
212 void TransformedTriangleTest::test_calcStableC_Consistency()
215 typedef TransformedTriangle::TriSegment TriSegment;
216 typedef TransformedTriangle::TetraCorner TetraCorner;
219 double correct_c_vals[24] =
221 p2[0] * q2[1] - p2[1] * q2[0],
222 p2[1] * q2[2] - p2[2] * q2[1],
223 p2[2] * q2[0] - p2[0] * q2[2],
224 p2[0] * hq2 - hp2 * q2[0],
225 p2[1] * hq2 - hp2 * q2[1],
226 p2[2] * hq2 - hp2 * q2[2],
227 Hp2 * q2[0] - p2[0] * Hq2,
228 p2[1] * Hq2 - Hp2 * q2[1],
229 q2[0] * r2[1] - q2[1] * r2[0],
230 q2[1] * r2[2] - q2[2] * r2[1],
231 q2[2] * r2[0] - q2[0] * r2[2],
232 q2[0] * hr2 - hq2 * r2[0],
233 q2[1] * hr2 - hq2 * r2[1],
234 q2[2] * hr2 - hq2 * r2[2],
235 Hq2 * r2[0] - q2[0] * Hr2,
236 q2[1] * Hr2 - Hq2 * r2[1],
237 r2[0]*p2[1]-r2[1]*p2[0],
238 r2[1]*p2[2]-r2[2]*p2[1],
239 r2[2]*p2[0]-r2[0]*p2[2],
240 r2[0] * hp2 - hr2 * p2[0],
241 r2[1] * hp2 - hr2 * p2[1],
242 r2[2] * hp2 - hr2 * p2[2],
243 Hr2 * p2[0] - r2[0] * Hp2,
244 r2[1] * Hp2 - Hr2 * p2[1]
248 // number of inconsistent cases found :
249 // should be (at least) 1 for the test to be meaningful
252 // find unstable products to check for consistency (Grandy [46])
253 for(TriSegment seg = TransformedTriangle::PQ ; seg <= TransformedTriangle::RP ; seg = TriSegment(seg + 1))
255 const double c_xy = tri2->calcUnstableC(seg, TransformedTriangle::C_XY);
256 const double c_yz = tri2->calcUnstableC(seg, TransformedTriangle::C_YZ);
257 const double c_zx = tri2->calcUnstableC(seg, TransformedTriangle::C_ZX);
258 const double c_xh = tri2->calcUnstableC(seg, TransformedTriangle::C_XH);
259 const double c_yh = tri2->calcUnstableC(seg, TransformedTriangle::C_YH);
260 const double c_zh = tri2->calcUnstableC(seg, TransformedTriangle::C_ZH);
262 const int num_zero = (c_yz*c_xh == 0.0 ? 1 : 0) + (c_zx*c_yh == 0.0 ? 1 : 0) + (c_xy*c_zh == 0.0 ? 1 : 0);
263 const int num_neg = (c_yz*c_xh < 0.0 ? 1 : 0) + (c_zx*c_yh < 0.0 ? 1 : 0) + (c_xy*c_zh < 0.0 ? 1 : 0);
265 if((num_zero == 1 && num_neg != 1) || num_zero == 2 || num_neg == 0 && num_zero !=3 || num_neg == 3 )
269 double min_dist = -1.0; // initialised first time through loop
270 TetraCorner min_corner = TransformedTriangle::O;
272 for(TetraCorner corner = TransformedTriangle::O ; corner <= TransformedTriangle::Z ; corner = TetraCorner(corner + 1))
274 // calculate distance from each corner of tetraeder to the segment
275 // formula : ( (Q-P) x (P - corner) )^2 / norm(Q-P)^2
277 const double ptP[3] = { tri2->_coords[5*seg], tri2->_coords[5*seg + 1], tri2->_coords[5*seg + 2] };
278 const double ptQ[3] = { tri2->_coords[5*( (seg+1) % 3)], tri2->_coords[5*( (seg+1) % 3) + 1], tri2->_coords[5*( (seg+1) % 3) + 2] };
279 const double ptCorner[3] = {
280 corner == TransformedTriangle::X ? 1.0 : 0.0,
281 corner == TransformedTriangle::Y ? 1.0 : 0.0,
282 corner == TransformedTriangle::Z ? 1.0 : 0.0,
285 const double diff_21[3] = { ptQ[0] - ptP[0], ptQ[1] - ptP[1], ptQ[2] - ptP[2] };
286 const double diff_1_corner[3] = { ptP[0] - ptCorner[0], ptP[1] - ptCorner[1], ptP[2] - ptCorner[2] };
288 const double cross[3] = {
289 diff_21[1]*diff_1_corner[2] - diff_21[2]*diff_1_corner[1],
290 diff_21[2]*diff_1_corner[0] - diff_21[0]*diff_1_corner[2],
291 diff_21[0]*diff_1_corner[1] - diff_21[1]*diff_1_corner[0]
294 const double cross_sq = cross[0]*cross[0] + cross[1]*cross[1] + cross[2]*cross[2];
296 const double norm_pq = diff_21[0]*diff_21[0] + diff_21[1]*diff_21[1] + diff_21[2]*diff_21[2];
298 if(corner == TransformedTriangle::O || (cross_sq / norm_pq) < min_dist)
300 min_dist = cross_sq / norm_pq;
305 // now check if the corresponding double products are zero
306 static const DoubleProduct DOUBLE_PRODUCTS[12] =
308 TransformedTriangle::C_YZ, TransformedTriangle::C_XY, TransformedTriangle::C_ZX, // O
309 TransformedTriangle::C_ZH, TransformedTriangle::C_YZ, TransformedTriangle::C_YH, // X
310 TransformedTriangle::C_ZH, TransformedTriangle::C_ZX, TransformedTriangle::C_XH, // Y
311 TransformedTriangle::C_XY, TransformedTriangle::C_YH, TransformedTriangle::C_XH // Z
314 for(int i = 0; i < 3 ; ++i)
316 DoubleProduct dp = DOUBLE_PRODUCTS[3*min_corner + i];
317 // std::cout << std::endl << "in test inconsistent (seg,dp) :(" << seg <<", " << dp << ")" << std::endl;
318 CPPUNIT_ASSERT_EQUAL(0.0, tri2->calcStableC(seg, dp));
319 correct_c_vals[8*seg + dp] = 0.0;
327 CPPUNIT_FAIL("Consistency test not pertinent");
330 // std::cout << std::endl << "Number of geometric inconsistencies : " << num_cases << std::endl;
332 // check that all other double products have right value too
335 for(TriSegment seg = TransformedTriangle::PQ ; seg <= TransformedTriangle::RP ; seg = TriSegment(seg + 1)) {
337 c_vals[seg*8 + 0] = tri2->calcStableC(seg, TransformedTriangle::C_XY);
338 c_vals[seg*8 + 1] = tri2->calcStableC(seg, TransformedTriangle::C_YZ);
339 c_vals[seg*8 + 2] = tri2->calcStableC(seg, TransformedTriangle::C_ZX);
340 c_vals[seg*8 + 3] = tri2->calcStableC(seg, TransformedTriangle::C_XH);
341 c_vals[seg*8 + 4] = tri2->calcStableC(seg, TransformedTriangle::C_YH);
342 c_vals[seg*8 + 5] = tri2->calcStableC(seg, TransformedTriangle::C_ZH);
343 c_vals[seg*8 + 6] = tri2->calcStableC(seg, TransformedTriangle::C_01);
344 c_vals[seg*8 + 7] = tri2->calcStableC(seg, TransformedTriangle::C_10);
348 for(int i = 0 ; i < 24 ; ++i)
350 CPPUNIT_ASSERT_DOUBLES_EQUAL(correct_c_vals[i], c_vals[i], ERR_TOL);