/*************************************************************************/ /* test_gradient.h */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /*************************************************************************/ #ifndef TEST_GRADIENT_H #define TEST_GRADIENT_H #include "core/math/color.h" #include "core/object/class_db.h" #include "scene/resources/gradient.h" #include "thirdparty/doctest/doctest.h" namespace TestGradient { TEST_CASE("[Gradient] Default gradient") { // Black-white gradient. Ref<Gradient> gradient = memnew(Gradient); CHECK_MESSAGE( gradient->get_points_count() == 2, "Default gradient should contain the expected number of points."); CHECK_MESSAGE( gradient->get_color_at_offset(0.0).is_equal_approx(Color(0, 0, 0)), "Default gradient should return the expected interpolated value at offset 0.0."); CHECK_MESSAGE( gradient->get_color_at_offset(0.4).is_equal_approx(Color(0.4, 0.4, 0.4)), "Default gradient should return the expected interpolated value at offset 0.4."); CHECK_MESSAGE( gradient->get_color_at_offset(0.8).is_equal_approx(Color(0.8, 0.8, 0.8)), "Default gradient should return the expected interpolated value at offset 0.8."); CHECK_MESSAGE( gradient->get_color_at_offset(1.0).is_equal_approx(Color(1, 1, 1)), "Default gradient should return the expected interpolated value at offset 1.0."); // Out of bounds checks. CHECK_MESSAGE( gradient->get_color_at_offset(-1.0).is_equal_approx(Color(0, 0, 0)), "Default gradient should return the expected interpolated value at offset -1.0."); CHECK_MESSAGE( gradient->get_color_at_offset(1234.0).is_equal_approx(Color(1, 1, 1)), "Default gradient should return the expected interpolated value at offset 1234.0."); } TEST_CASE("[Gradient] Custom gradient (points specified in order)") { // Red-yellow-green gradient (with overbright green). Ref<Gradient> gradient = memnew(Gradient); Vector<Gradient::Point> points; points.push_back({ 0.0, Color(1, 0, 0) }); points.push_back({ 0.5, Color(1, 1, 0) }); points.push_back({ 1.0, Color(0, 2, 0) }); gradient->set_points(points); CHECK_MESSAGE( gradient->get_points_count() == 3, "Custom gradient should contain the expected number of points."); CHECK_MESSAGE( gradient->get_color_at_offset(0.0).is_equal_approx(Color(1, 0, 0)), "Custom gradient should return the expected interpolated value at offset 0.0."); CHECK_MESSAGE( gradient->get_color_at_offset(0.25).is_equal_approx(Color(1, 0.5, 0)), "Custom gradient should return the expected interpolated value at offset 0.25."); CHECK_MESSAGE( gradient->get_color_at_offset(0.5).is_equal_approx(Color(1, 1, 0)), "Custom gradient should return the expected interpolated value at offset 0.5."); CHECK_MESSAGE( gradient->get_color_at_offset(0.75).is_equal_approx(Color(0.5, 1.5, 0)), "Custom gradient should return the expected interpolated value at offset 0.75."); CHECK_MESSAGE( gradient->get_color_at_offset(1.0).is_equal_approx(Color(0, 2, 0)), "Custom gradient should return the expected interpolated value at offset 1.0."); gradient->remove_point(1); CHECK_MESSAGE( gradient->get_points_count() == 2, "Custom gradient should contain the expected number of points after removing one point."); CHECK_MESSAGE( gradient->get_color_at_offset(0.5).is_equal_approx(Color(0.5, 1, 0)), "Custom gradient should return the expected interpolated value at offset 0.5 after removing point at index 1."); } TEST_CASE("[Gradient] Custom gradient (points specified out-of-order)") { // HSL rainbow with points specified out of order. // These should be sorted automatically when adding points. Ref<Gradient> gradient = memnew(Gradient); Vector<Gradient::Point> points; points.push_back({ 0.2, Color(1, 0, 0) }); points.push_back({ 0.0, Color(1, 1, 0) }); points.push_back({ 0.8, Color(0, 1, 0) }); points.push_back({ 0.4, Color(0, 1, 1) }); points.push_back({ 1.0, Color(0, 0, 1) }); points.push_back({ 0.6, Color(1, 0, 1) }); gradient->set_points(points); CHECK_MESSAGE( gradient->get_points_count() == 6, "Custom out-of-order gradient should contain the expected number of points."); CHECK_MESSAGE( gradient->get_color_at_offset(0.0).is_equal_approx(Color(1, 1, 0)), "Custom out-of-order gradient should return the expected interpolated value at offset 0.0."); CHECK_MESSAGE( gradient->get_color_at_offset(0.3).is_equal_approx(Color(0.5, 0.5, 0.5)), "Custom out-of-order gradient should return the expected interpolated value at offset 0.3."); CHECK_MESSAGE( gradient->get_color_at_offset(0.6).is_equal_approx(Color(1, 0, 1)), "Custom out-of-order gradient should return the expected interpolated value at offset 0.6."); CHECK_MESSAGE( gradient->get_color_at_offset(1.0).is_equal_approx(Color(0, 0, 1)), "Custom out-of-order gradient should return the expected interpolated value at offset 1.0."); gradient->remove_point(0); CHECK_MESSAGE( gradient->get_points_count() == 5, "Custom out-of-order gradient should contain the expected number of points after removing one point."); // The color will be clamped to the nearest point (which is at offset 0.2). CHECK_MESSAGE( gradient->get_color_at_offset(0.1).is_equal_approx(Color(1, 0, 0)), "Custom out-of-order gradient should return the expected interpolated value at offset 0.1 after removing point at index 0."); } } // namespace TestGradient #endif // TEST_GRADIENT_H