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testsuite Add curve tangent tests

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This commit is contained in:
Matthias Clasen
2020-12-07 11:51:47 -05:00
committed by Benjamin Otte
parent b5f3aebdd4
commit 1186fea22f
1 changed files with 50 additions and 0 deletions
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50
testsuite/gsk/curve-special-cases.c
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@@ -71,6 +71,55 @@ test_conic_segment (void)
g_assert_cmpfloat_with_epsilon (measure_length (&c), measure_length (&s) + measure_length (&m) + measure_length (&e), 0.03125);
}
static void
test_curve_tangents (void)
{
GskCurve c;
graphene_point_t p[4];
graphene_vec2_t t;
graphene_point_init (&p[0], 0, 0);
graphene_point_init (&p[1], 100, 0);
gsk_curve_init (&c, gsk_pathop_encode (GSK_PATH_LINE, p));
gsk_curve_get_start_tangent (&c, &t);
g_assert_true (graphene_vec2_near (&t, graphene_vec2_x_axis (), 0.0001));
gsk_curve_get_end_tangent (&c, &t);
g_assert_true (graphene_vec2_near (&t, graphene_vec2_x_axis (), 0.0001));
graphene_point_init (&p[0], 0, 0);
graphene_point_init (&p[1], 0, 100);
gsk_curve_init (&c, gsk_pathop_encode (GSK_PATH_LINE, p));
gsk_curve_get_start_tangent (&c, &t);
g_assert_true (graphene_vec2_near (&t, graphene_vec2_y_axis (), 0.0001));
gsk_curve_get_end_tangent (&c, &t);
g_assert_true (graphene_vec2_near (&t, graphene_vec2_y_axis (), 0.0001));
graphene_point_init (&p[0], 0, 0);
graphene_point_init (&p[1], 100, 0);
p[2] = GRAPHENE_POINT_INIT (g_test_rand_double_range (0, 20), 0);
graphene_point_init (&p[3], 100, 100);
gsk_curve_init (&c, gsk_pathop_encode (GSK_PATH_CONIC, p));
gsk_curve_get_start_tangent (&c, &t);
g_assert_true (graphene_vec2_near (&t, graphene_vec2_x_axis (), 0.0001));
gsk_curve_get_end_tangent (&c, &t);
g_assert_true (graphene_vec2_near (&t, graphene_vec2_y_axis (), 0.0001));
graphene_point_init (&p[0], 0, 0);
graphene_point_init (&p[1], 50, 0);
graphene_point_init (&p[2], 100, 50);
graphene_point_init (&p[3], 100, 100);
gsk_curve_init (&c, gsk_pathop_encode (GSK_PATH_CURVE, p));
gsk_curve_get_start_tangent (&c, &t);
g_assert_true (graphene_vec2_near (&t, graphene_vec2_x_axis (), 0.0001));
gsk_curve_get_end_tangent (&c, &t);
g_assert_true (graphene_vec2_near (&t, graphene_vec2_y_axis (), 0.0001));
}
int
main (int argc,
char *argv[])
@@ -78,6 +127,7 @@ main (int argc,
gtk_test_init (&argc, &argv, NULL);
g_test_add_func ("/curve/special/conic-segment", test_conic_segment);
g_test_add_func ("/curve/special/tangents", test_curve_tangents);
return g_test_run ();
}