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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 047bbebff7
commit fa9bb82040
1 changed files with 71 additions and 0 deletions
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71
testsuite/gsk/curve.c
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@@ -321,6 +321,76 @@ test_curve_intersection_horizontal_line (void)
g_assert_true (n == 1);
}
/* Some sanity checks for splitting curves.
*/
static void
test_curve_split (void)
{
for (int i = 0; i < 100; i++)
{
GskCurve c;
GskPathBuilder *builder;
GskPath *path;
GskPathMeasure *measure;
const graphene_point_t *s;
GskCurve c1, c2;
graphene_point_t p;
graphene_vec2_t t, t1, t2;
init_random_curve (&c);
builder = gsk_path_builder_new ();
s = gsk_curve_get_start_point (&c);
gsk_path_builder_move_to (builder, s->x, s->y);
gsk_curve_builder_to (&c, builder);
path = gsk_path_builder_free_to_path (builder);
measure = gsk_path_measure_new_with_tolerance (path, 0.1);
gsk_curve_split (&c, 0.5, &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_get_point (&c, 0.5, &p);
gsk_curve_get_tangent (&c, 0.5, &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));
for (int k = 0; k < 20; k++)
{
graphene_point_t q;
float dist;
gsk_curve_get_point (&c1, k/19.0, &q);
dist = gsk_path_measure_get_closest_point (measure, &q, NULL);
g_assert_cmpfloat (dist, <=, 0.2);
gsk_curve_get_point (&c2, k/19.0, &q);
dist = gsk_path_measure_get_closest_point (measure, &q, NULL);
g_assert_cmpfloat (dist, <=, 0.2);
}
}
}
int
main (int argc, char *argv[])
{
@@ -333,6 +403,7 @@ main (int argc, char *argv[])
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/intersection/horizontal-line", test_curve_intersection_horizontal_line);
g_test_add_func ("/curve/split", test_curve_split);
return g_test_run ();
}