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Add curve split tests

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This commit is contained in:
Matthias Clasen
2020-12-07 20:51:23 -05:00
parent f3e861d54e
commit 6763e216d8
1 changed files with 49 additions and 0 deletions
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49
testsuite/gsk/curve.c
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@@ -227,6 +227,54 @@ test_curve_curve_intersection (void)
g_assert_cmpfloat (t2[1], >, 0.5);
}
/* Some sanity checks for splitting curves.
*/
static void
test_curve_split (void)
{
GskCurve c;
for (int i = 0; i < 100; i++)
{
init_random_curve (&c);
for (int j = 1; j < 20; j++)
{
GskCurve c1, c2;
graphene_point_t p;
graphene_vec2_t t, t1, t2;
gsk_curve_split (&c, j / 20.0, &c1, &c2);
g_assert_true (c1.op == c.op);
g_assert_true (c2.op == c.op);
g_assert_true (graphene_point_near (gsk_curve_get_start_point (&c),
gsk_curve_get_start_point (&c1), 0.005));
g_assert_true (graphene_point_near (gsk_curve_get_end_point (&c1),
gsk_curve_get_start_point (&c2), 0.005));
g_assert_true (graphene_point_near (gsk_curve_get_end_point (&c),
gsk_curve_get_end_point (&c2), 0.005));
gsk_curve_eval (&c, j / 20.0, &p, &t);
g_assert_true (graphene_point_near (gsk_curve_get_end_point (&c1), &p, 0.005));
g_assert_true (graphene_point_near (gsk_curve_get_start_point (&c2), &p, 0.005));
gsk_curve_get_start_tangent (&c, &t1);
gsk_curve_get_start_tangent (&c1, &t2);
g_assert_true (graphene_vec2_near (&t1, &t2, 0.005));
gsk_curve_get_end_tangent (&c1, &t1);
gsk_curve_get_start_tangent (&c2, &t2);
g_assert_true (graphene_vec2_near (&t1, &t2, 0.005));
g_assert_true (graphene_vec2_near (&t, &t1, 0.005));
g_assert_true (graphene_vec2_near (&t, &t2, 0.005));
gsk_curve_get_end_tangent (&c, &t1);
gsk_curve_get_end_tangent (&c2, &t2);
g_assert_true (graphene_vec2_near (&t1, &t2, 0.005));
}
}
}
int
main (int argc, char *argv[])
{
@@ -238,6 +286,7 @@ main (int argc, char *argv[])
g_test_add_func ("/curve/intersection/line-line", test_line_line_intersection);
g_test_add_func ("/curve/intersection/line-curve", test_line_curve_intersection);
g_test_add_func ("/curve/intersection/curve-curve", test_curve_curve_intersection);
g_test_add_func ("/curve/split", test_curve_split);
return g_test_run ();
}