From c816eee4d1b57abbe6db0f3ccdf4b6ea0daaad2b Mon Sep 17 00:00:00 2001 From: Matthias Clasen Date: Fri, 1 Apr 2022 17:26:54 -0400 Subject: [PATCH] curve: Add more line-curve intersection tests --- testsuite/gsk/curve.c | 142 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 142 insertions(+) diff --git a/testsuite/gsk/curve.c b/testsuite/gsk/curve.c index 709057b14f..4520ce7c87 100644 --- a/testsuite/gsk/curve.c +++ b/testsuite/gsk/curve.c @@ -416,6 +416,147 @@ test_line_curve_intersection (void) gsk_bounding_box_contains_point (&b, &p[0]); } +static void +test_line_curve_multiple_intersection (void) +{ + GskCurve c1, c2; + graphene_point_t p1[4], p2[2]; + float t1[9], t2[9]; + graphene_point_t p[9]; + graphene_point_t pp; + int n; + GskBoundingBox b1, b2; + + graphene_point_init (&p1[0], 100, 200); + graphene_point_init (&p1[1], 350, 100); + graphene_point_init (&p1[2], 100, 350); + graphene_point_init (&p1[3], 400, 300); + + graphene_point_init (&p2[0], 0, 0); + graphene_point_init (&p2[1], 100, 100); + + gsk_curve_init (&c1, gsk_pathop_encode (GSK_PATH_CURVE, p1)); + gsk_curve_init (&c2, gsk_pathop_encode (GSK_PATH_LINE, p2)); + + n = gsk_curve_intersect (&c1, &c2, t1, t2, p, 3); + + g_assert_cmpint (n, ==, 0); + + graphene_point_init (&p2[0], 0, 0); + graphene_point_init (&p2[1], 200, 200); + + gsk_curve_init (&c1, gsk_pathop_encode (GSK_PATH_CURVE, p1)); + gsk_curve_init (&c2, gsk_pathop_encode (GSK_PATH_LINE, p2)); + + n = gsk_curve_intersect (&c1, &c2, t1, t2, p, 3); + + g_assert_cmpint (n, ==, 1); + + g_assert_cmpfloat_with_epsilon (t1[0], 0.136196628, 0.0001); + g_assert_cmpfloat_with_epsilon (t2[0], 0.88487947, 0.0001); + g_assert_true (graphene_point_near (&p[0], &GRAPHENE_POINT_INIT (176.975891, 176.975891), 0.001)); + + gsk_curve_get_point (&c1, t1[0], &pp); + g_assert_true (graphene_point_near (&p[0], &pp, 0.001)); + + gsk_curve_get_point (&c2, t2[0], &pp); + g_assert_true (graphene_point_near (&p[0], &pp, 0.001)); + + gsk_curve_get_tight_bounds (&c1, &b1); + gsk_curve_get_tight_bounds (&c2, &b2); + + gsk_bounding_box_contains_point (&b1, &p[0]); + gsk_bounding_box_contains_point (&b2, &p[0]); + + graphene_point_init (&p2[0], 0, 0); + graphene_point_init (&p2[1], 280, 280); + + gsk_curve_init (&c1, gsk_pathop_encode (GSK_PATH_CURVE, p1)); + gsk_curve_init (&c2, gsk_pathop_encode (GSK_PATH_LINE, p2)); + + n = gsk_curve_intersect (&c1, &c2, t1, t2, p, 3); + + g_assert_cmpint (n, ==, 2); + + g_assert_cmpfloat_with_epsilon (t1[0], 0.136196628, 0.0001); + g_assert_cmpfloat_with_epsilon (t2[0], 0.632056773, 0.0001); + g_assert_true (graphene_point_near (&p[0], &GRAPHENE_POINT_INIT (176.975891, 176.975891), 0.001)); + + gsk_curve_get_point (&c1, t1[0], &pp); + g_assert_true (graphene_point_near (&p[0], &pp, 0.001)); + + gsk_curve_get_point (&c2, t2[0], &pp); + g_assert_true (graphene_point_near (&p[0], &pp, 0.001)); + + g_assert_cmpfloat_with_epsilon (t1[1], 0.499999911, 0.0001); + g_assert_cmpfloat_with_epsilon (t2[1], 0.825892806, 0.0001); + g_assert_true (graphene_point_near (&p[1], &GRAPHENE_POINT_INIT (231.25, 231.25), 0.001)); + + gsk_curve_get_point (&c1, t1[1], &pp); + g_assert_true (graphene_point_near (&p[1], &pp, 0.001)); + + gsk_curve_get_point (&c2, t2[1], &pp); + g_assert_true (graphene_point_near (&p[1], &pp, 0.001)); + + gsk_curve_get_tight_bounds (&c1, &b1); + gsk_curve_get_tight_bounds (&c2, &b2); + + gsk_bounding_box_contains_point (&b1, &p[0]); + gsk_bounding_box_contains_point (&b1, &p[1]); + gsk_bounding_box_contains_point (&b2, &p[0]); + gsk_bounding_box_contains_point (&b2, &p[1]); + + graphene_point_init (&p2[0], 0, 0); + graphene_point_init (&p2[1], 1000, 1000); + + gsk_curve_init (&c1, gsk_pathop_encode (GSK_PATH_CURVE, p1)); + gsk_curve_init (&c2, gsk_pathop_encode (GSK_PATH_LINE, p2)); + + n = gsk_curve_intersect (&c1, &c2, t1, t2, p, 3); + + g_assert_cmpint (n, ==, 3); + + g_assert_cmpfloat_with_epsilon (t1[0], 0.863803446, 0.0001); + g_assert_cmpfloat_with_epsilon (t2[0], 0.305377066, 0.0001); + g_assert_true (graphene_point_near (&p[0], &GRAPHENE_POINT_INIT (305.377075, 305.377075), 0.001)); + + gsk_curve_get_point (&c1, t1[0], &pp); + g_assert_true (graphene_point_near (&p[0], &pp, 0.001)); + + gsk_curve_get_point (&c2, t2[0], &pp); + g_assert_true (graphene_point_near (&p[0], &pp, 0.001)); + + g_assert_cmpfloat_with_epsilon (t1[1], 0.136196628, 0.0001); + g_assert_cmpfloat_with_epsilon (t2[1], 0.176975891, 0.0001); + g_assert_true (graphene_point_near (&p[1], &GRAPHENE_POINT_INIT (176.975891, 176.975891), 0.001)); + + gsk_curve_get_point (&c1, t1[1], &pp); + g_assert_true (graphene_point_near (&p[1], &pp, 0.001)); + + gsk_curve_get_point (&c2, t2[1], &pp); + g_assert_true (graphene_point_near (&p[1], &pp, 0.001)); + + g_assert_cmpfloat_with_epsilon (t1[2], 0.5, 0.0001); + g_assert_cmpfloat_with_epsilon (t2[2], 0.231249988, 0.0001); + g_assert_true (graphene_point_near (&p[2], &GRAPHENE_POINT_INIT (231.249985, 231.249985), 0.001)); + + gsk_curve_get_point (&c1, t1[2], &pp); + g_assert_true (graphene_point_near (&p[2], &pp, 0.001)); + + gsk_curve_get_point (&c2, t2[2], &pp); + g_assert_true (graphene_point_near (&p[2], &pp, 0.001)); + + gsk_curve_get_tight_bounds (&c1, &b1); + gsk_curve_get_tight_bounds (&c2, &b2); + + gsk_bounding_box_contains_point (&b1, &p[0]); + gsk_bounding_box_contains_point (&b1, &p[1]); + gsk_bounding_box_contains_point (&b1, &p[2]); + gsk_bounding_box_contains_point (&b2, &p[0]); + gsk_bounding_box_contains_point (&b2, &p[1]); + gsk_bounding_box_contains_point (&b2, &p[2]); +} + static void test_line_curve_end_intersection (void) { @@ -859,6 +1000,7 @@ main (int argc, char *argv[]) g_test_add_func ("/curve/intersection/line-curve", test_line_curve_intersection); g_test_add_func ("/curve/intersection/line-curve-end", test_line_curve_end_intersection); g_test_add_func ("/curve/intersection/line-curve-none", test_line_curve_none_intersection); + g_test_add_func ("/curve/intersection/line-curve-multiple", test_line_curve_multiple_intersection); g_test_add_func ("/curve/intersection/curve-curve", test_curve_curve_intersection); g_test_add_func ("/curve/intersection/curve-curve-end", test_curve_curve_end_intersection); g_test_add_func ("/curve/intersection/curve-curve-end2", test_curve_curve_end_intersection2);