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Add some more arc tests

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This commit is contained in:
Matthias Clasen 2023-08-24 07:40:05 -04:00
parent 63d5615fe7
commit 8d0654db6b
1 changed files with 38 additions and 11 deletions
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49
testsuite/gsk/curve-special-cases.c
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@ -145,26 +145,52 @@ test_curve_crossing (void)
}
}
static void
test_circle (void)
{
GskCurve c;
graphene_point_t p;
graphene_vec2_t tangent, tangent2;
parse_curve (&c, "M 1 0 E 1 1 0 1");
g_assert_true (graphene_point_equal (gsk_curve_get_start_point (&c), &GRAPHENE_POINT_INIT (1, 0)));
g_assert_true (graphene_point_equal (gsk_curve_get_end_point (&c), &GRAPHENE_POINT_INIT (0, 1)));
gsk_curve_get_start_tangent (&c, &tangent);
g_assert_true (graphene_vec2_equal (&tangent, graphene_vec2_init (&tangent2, 0, 1)));
gsk_curve_get_end_tangent (&c, &tangent);
g_assert_true (graphene_vec2_equal (&tangent, graphene_vec2_init (&tangent2, -1, 0)));
for (int i = 1; i < 10; i++)
{
float t = i / 10.f;
gsk_curve_get_point (&c, t, &p);
g_assert_true (graphene_point_near (&p,
&GRAPHENE_POINT_INIT (cos (t * M_PI_2), sin (t * M_PI_2)), 0.001));
}
}
static void
test_arc (void)
{
GskCurve c;
graphene_point_t p;
parse_curve (&c, "M 1 0 E 1 1 0 1");
g_assert_true (graphene_point_equal (gsk_curve_get_start_point (&c), &GRAPHENE_POINT_INIT (1, 0)));
g_assert_true (graphene_point_equal (gsk_curve_get_end_point (&c), &GRAPHENE_POINT_INIT (0, 1)));
gsk_curve_get_point (&c, 0.5, &p);
g_assert_true (graphene_point_near (&p,
&GRAPHENE_POINT_INIT (cos (M_PI/4), sin (M_PI/4)), 0.001));
parse_curve (&c, "M 100 100 E 200 100 200 200");
g_assert_true (graphene_point_equal (gsk_curve_get_start_point (&c), &GRAPHENE_POINT_INIT (100, 100)));
g_assert_true (graphene_point_equal (gsk_curve_get_end_point (&c), &GRAPHENE_POINT_INIT (200, 200)));
gsk_curve_get_point (&c, 0.5, &p);
g_assert_true (graphene_point_near (&p,
&GRAPHENE_POINT_INIT (100 + 100 * sin (M_PI/4), 100 + 100 * (1 - cos (M_PI/4))), 0.001));
for (int i = 1; i < 10; i++)
{
float t = i / 10.f;
gsk_curve_get_point (&c, t, &p);
g_assert_true (graphene_point_near (&p,
&GRAPHENE_POINT_INIT (100 + 100 * sin (t * M_PI_2), 100 + 100 * (1 - cos (t * M_PI_2))), 0.001));
}
}
int
@ -176,6 +202,7 @@ main (int argc,
g_test_add_func ("/curve/special/tangents", test_curve_tangents);
g_test_add_func ("/curve/special/degenerate-tangents", test_curve_degenerate_tangents);
g_test_add_func ("/curve/special/crossing", test_curve_crossing);
g_test_add_func ("/curve/special/circle", test_circle);
g_test_add_func ("/curve/special/arc", test_arc);
return g_test_run ();