1 #include <utest/utest.h>
2 #include <libnr/nr-matrix.h>
3 #include <libnr/nr-matrix-fns.h>
4 #include <libnr/nr-matrix-ops.h>
5 #include <libnr/nr-matrix-rotate-ops.h>
6 #include <libnr/nr-matrix-scale-ops.h>
7 #include <libnr/nr-point-matrix-ops.h>
8 #include <libnr/nr-rotate.h>
9 #include <libnr/nr-rotate-ops.h>
10 #include <libnr/nr-scale-ops.h>
11 #include <libnr/nr-scale-translate-ops.h>
12 #include <libnr/nr-translate.h>
13 #include <libnr/nr-translate-ops.h>
14 #include <libnr/nr-translate-scale-ops.h>
15 using NR::Matrix;
16 using NR::X;
17 using NR::Y;
19 inline bool point_equalp(NR::Point const &a, NR::Point const &b)
20 {
21 return ( NR_DF_TEST_CLOSE(a[X], b[X], 1e-5) &&
22 NR_DF_TEST_CLOSE(a[Y], b[Y], 1e-5) );
23 }
25 int main(int argc, char *argv[])
26 {
27 int rc = EXIT_SUCCESS;
29 Matrix const m_id(NR::identity());
30 NR::rotate const r_id(NR::Point(1, 0));
31 NR::translate const t_id(0, 0);
33 utest_start("Matrix");
35 Matrix const c16(1.0, 2.0,
36 3.0, 4.0,
37 5.0, 6.0);
38 UTEST_TEST("basic constructors, operator=") {
39 Matrix const c16_copy(c16);
40 Matrix c16_eq(m_id);
41 c16_eq = c16;
42 for(unsigned i = 0; i < 6; ++i) {
43 UTEST_ASSERT( c16[i] == 1.0 + i );
44 UTEST_ASSERT( c16[i] == c16_copy[i] );
45 UTEST_ASSERT( c16[i] == c16_eq[i] );
46 UTEST_ASSERT( m_id[i] == double( i == 0 || i == 3 ) );
47 }
48 }
50 UTEST_TEST("scale constructor") {
51 NR::scale const s(2.0, 3.0);
52 NR::Matrix const ms(s);
53 NR::Point const p(5.0, 7.0);
54 UTEST_ASSERT( p * s == NR::Point(10.0, 21.0) );
55 UTEST_ASSERT( p * ms == NR::Point(10.0, 21.0) );
56 }
58 NR::rotate const r86(NR::Point(.8, .6));
59 NR::Matrix const mr86(r86);
60 UTEST_TEST("rotate constructor") {
61 NR::Point const p0(1.0, 0.0);
62 NR::Point const p90(0.0, 1.0);
63 UTEST_ASSERT( p0 * r86 == NR::Point(.8, .6) );
64 UTEST_ASSERT( p0 * mr86 == NR::Point(.8, .6) );
65 UTEST_ASSERT( p90 * r86 == NR::Point(-.6, .8) );
66 UTEST_ASSERT( p90 * mr86 == NR::Point(-.6, .8) );
67 UTEST_ASSERT(matrix_equalp(Matrix( r86 * r86 ),
68 mr86 * mr86,
69 1e-14));
70 }
72 NR::translate const t23(2.0, 3.0);
73 UTEST_TEST("translate constructor") {
74 NR::Matrix const mt23(t23);
75 NR::Point const b(-2.0, 3.0);
76 UTEST_ASSERT( b * t23 == b * mt23 );
77 }
79 NR::scale const s_id(1.0, 1.0);
80 UTEST_TEST("test_identity") {
81 UTEST_ASSERT(m_id.test_identity());
82 UTEST_ASSERT(Matrix(t_id).test_identity());
83 UTEST_ASSERT(!(Matrix(NR::translate(-2, 3)).test_identity()));
84 UTEST_ASSERT(Matrix(r_id).test_identity());
85 NR::rotate const rot180(NR::Point(-1, 0));
86 UTEST_ASSERT(!(Matrix(rot180).test_identity()));
87 UTEST_ASSERT(Matrix(s_id).test_identity());
88 UTEST_ASSERT(!(Matrix(NR::scale(1.0, 0.0)).test_identity()));
89 UTEST_ASSERT(!(Matrix(NR::scale(0.0, 1.0)).test_identity()));
90 UTEST_ASSERT(!(Matrix(NR::scale(1.0, -1.0)).test_identity()));
91 UTEST_ASSERT(!(Matrix(NR::scale(-1.0, -1.0)).test_identity()));
92 }
94 UTEST_TEST("inverse") {
95 UTEST_ASSERT( m_id.inverse() == m_id );
96 UTEST_ASSERT( Matrix(t23).inverse() == Matrix(NR::translate(-2.0, -3.0)) );
97 NR::scale const s2(-4.0, 2.0);
98 NR::scale const sp5(-.25, .5);
99 UTEST_ASSERT( Matrix(s2).inverse() == Matrix(sp5) );
100 }
102 UTEST_TEST("nr_matrix_invert") {
103 NRMatrix const nr_m_id(m_id);
104 Matrix const m_s2(NR::scale(-4.0, 2.0));
105 NRMatrix const nr_s2(m_s2);
106 Matrix const m_sp5(NR::scale(-.25, .5));
107 NRMatrix const nr_sp5(m_sp5);
108 Matrix const m_t23(t23);
109 NRMatrix const nr_t23(m_t23);
110 NRMatrix inv;
111 nr_matrix_invert(&inv, &nr_m_id);
112 UTEST_ASSERT( Matrix(inv) == m_id );
113 nr_matrix_invert(&inv, &nr_t23);
114 UTEST_ASSERT( Matrix(inv) == Matrix(NR::translate(-2.0, -3.0)) );
115 nr_matrix_invert(&inv, &nr_s2);
116 UTEST_ASSERT( Matrix(inv) == Matrix(nr_sp5) );
117 nr_matrix_invert(&inv, &nr_sp5);
118 UTEST_ASSERT( Matrix(inv) == Matrix(nr_s2) );
120 /* Test that nr_matrix_invert handles src == dest. */
121 inv = nr_s2;
122 nr_matrix_invert(&inv, &inv);
123 UTEST_ASSERT( Matrix(inv) == Matrix(nr_sp5) );
124 inv = nr_t23;
125 nr_matrix_invert(&inv, &inv);
126 UTEST_ASSERT( Matrix(inv) == Matrix(NR::translate(-2.0, -3.0)) );
127 }
129 UTEST_TEST("elliptic quadratic form") {
130 NR::Matrix const aff(1.0, 1.0,
131 0.0, 1.0,
132 5.0, 6.0);
133 NR::Matrix const invaff = aff.inverse();
134 UTEST_ASSERT( invaff[1] == -1.0 );
136 NR::Matrix const ef(elliptic_quadratic_form(invaff));
137 NR::Matrix const exp_ef(2, -1,
138 -1, 1,
139 0, 0);
140 UTEST_ASSERT( ef == exp_ef );
141 }
143 UTEST_TEST("Matrix * rotate") {
144 NR::Matrix const ma(2.0, -1.0,
145 4.0, 4.0,
146 -0.5, 2.0);
147 NR::Matrix const a_r86( ma * r86 );
148 NR::Matrix const ma1( a_r86 * r86.inverse() );
149 UTEST_ASSERT(matrix_equalp(ma1, ma, 1e-12));
150 NR::Matrix const exp_a_r86( 2*.8 + -1*-.6, 2*.6 + -1*.8,
151 4*.8 + 4*-.6, 4*.6 + 4*.8,
152 -.5*.8 + 2*-.6, -.5*.6 + 2*.8 );
153 UTEST_ASSERT(matrix_equalp(a_r86, exp_a_r86, 1e-12));
154 }
156 UTEST_TEST("translate*scale, scale*translate") {
157 NR::translate const t2n4(2, -4);
158 NR::scale const sn2_8(-2, 8);
159 NR::Matrix const exp_ts(-2, 0,
160 0, 8,
161 -4, -32);
162 NR::Matrix const exp_st(-2, 0,
163 0, 8,
164 2, -4);
165 UTEST_ASSERT( exp_ts == t2n4 * sn2_8 );
166 UTEST_ASSERT( exp_st == sn2_8 * t2n4 );
167 }
169 UTEST_TEST("Matrix * scale") {
170 NR::Matrix const ma(2.0, -1.0,
171 4.0, 4.0,
172 -0.5, 2.0);
173 NR::scale const sn2_8(-2, 8);
174 NR::Matrix const exp_as(-4, -8,
175 -8, 32,
176 1, 16);
177 UTEST_ASSERT( ma * sn2_8 == exp_as );
178 }
180 if (!utest_end()) {
181 rc = EXIT_FAILURE;
182 }
184 return rc;
185 }
188 /*
189 Local Variables:
190 mode:c++
191 c-file-style:"stroustrup"
192 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
193 indent-tabs-mode:nil
194 fill-column:99
195 End:
196 */
197 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :