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Add randomized curve closest point tests

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This commit is contained in:
Matthias Clasen
2023-07-03 15:25:46 -04:00
parent a235b2fa14
commit 7b77b34fab
1 changed files with 38 additions and 8 deletions
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46
testsuite/gsk/curve.c
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@@ -1069,7 +1069,7 @@ test_curve_split (void)
graphene_point_t p;
graphene_vec2_t t, t1, t2;
init_random_curve (&c);
init_random_curve_with_op (&c, GSK_PATH_LINE, GSK_PATH_CUBIC);
builder = gsk_path_builder_new ();
@@ -1110,17 +1110,17 @@ test_curve_split (void)
for (int k = 0; k < 20; k++)
{
graphene_point_t q;
float dist;
float dist, tt;
gsk_curve_get_point (&c1, k/19.0, &q);
gsk_path_measure_get_closest_point_full (measure, &q, INFINITY,
&dist, NULL, NULL, NULL);
g_assert_cmpfloat (dist, <=, 0.2);
gsk_curve_get_closest_point (&c, &q, &dist, &p, &tt);
g_print ("%s\nlooking for %g %g (at %g), finding %g %g\n", gsk_curve_to_string (&c), q.x, q.y, k/19.0, p.x, p.y);
g_assert_cmpfloat (dist, <=, 0.5);
gsk_curve_get_point (&c2, k/19.0, &q);
gsk_path_measure_get_closest_point_full (measure, &q, INFINITY,
&dist, NULL, NULL, NULL);
g_assert_cmpfloat (dist, <=, 0.2);
gsk_curve_get_closest_point (&c, &q, &dist, &p, &tt);
g_print ("looking for %g %g (at %g), finding %g %g\n", q.x, q.y, k/19.0, p.x, p.y);
g_assert_cmpfloat (dist, <=, 0.5);
}
gsk_path_measure_unref (measure);
@@ -1236,6 +1236,35 @@ test_curve_offset (void)
g_assert_true (graphene_point_near (&r.conic.points[3], &GRAPHENE_POINT_INIT (110, 100), 0.0001));
}
static void
test_curve_closest_point (void)
{
for (int i = 0; i < 100; i++)
{
GskCurve curve;
init_random_curve_with_op (&curve, GSK_PATH_LINE, GSK_PATH_CUBIC);
for (int j = 0; j < 100; j++)
{
float t = g_test_rand_double_range (0, 1);
graphene_point_t p, p2;
float distance, t2;
g_print ("curve %s\n", gsk_curve_to_string (&curve));
gsk_curve_get_point (&curve, t, &p);
g_print ("t %g: %g %g\n", t, p.x, p.y);
t2 = t;
gsk_curve_get_closest_point (&curve, &p, &distance, &p2, &t2);
g_print ("closest %g: %g %g, distance %g\n", t2, p2.x, p2.y, distance);
g_assert_true (fabs (t2 - t) < 0.0001);
g_assert_true (graphene_point_near (&p, &p2, 0.1));
}
}
}
int
main (int argc, char *argv[])
{
@@ -1266,6 +1295,7 @@ main (int argc, char *argv[])
g_test_add_func ("/curve/intersection/match", test_curve_intersection_match);
g_test_add_func ("/curve/split", test_curve_split);
g_test_add_func ("/curve/offset", test_curve_offset);
g_test_add_func ("/curve/closest-point", test_curve_closest_point);
return g_test_run ();
}