268 lines
11 KiB
C++
268 lines
11 KiB
C++
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/**************************************************************************/
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/* test_noise_texture_2d.h */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#ifndef TEST_NOISE_TEXTURE_2D_H
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#define TEST_NOISE_TEXTURE_2D_H
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#include "tests/test_macros.h"
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#include "modules/noise/noise_texture_2d.h"
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namespace TestNoiseTexture2D {
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class NoiseTextureTester : public RefCounted {
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GDCLASS(NoiseTextureTester, RefCounted);
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const NoiseTexture2D *const texture;
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public:
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NoiseTextureTester(const NoiseTexture2D *const p_texture) :
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texture{ p_texture } {};
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Color compute_average_color(const Ref<Image> &p_noise_image) {
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Color r_avg_color{};
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for (int i = 0; i < p_noise_image->get_width(); ++i) {
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for (int j = 0; j < p_noise_image->get_height(); ++j) {
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const Color pixel = p_noise_image->get_pixel(i, j);
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r_avg_color += pixel;
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}
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}
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int pixel_count = p_noise_image->get_width() * p_noise_image->get_height();
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r_avg_color /= pixel_count;
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return r_avg_color;
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}
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void check_mip_and_color_ramp() {
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const Ref<Image> noise_image = texture->get_image();
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CHECK(noise_image.is_valid());
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CHECK(noise_image->get_width() == texture->get_width());
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CHECK(noise_image->get_height() == texture->get_height());
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CHECK(noise_image->get_format() == Image::FORMAT_RGBA8);
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CHECK(noise_image->has_mipmaps());
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Color avg_color = compute_average_color(noise_image);
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// Check that the noise texture is modulated correctly by the color ramp (Gradient).
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CHECK_FALSE_MESSAGE((avg_color.r + avg_color.g + avg_color.b) == doctest::Approx(0.0), "The noise texture should not be all black");
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CHECK_FALSE_MESSAGE((avg_color.r + avg_color.g + avg_color.b) == doctest::Approx(noise_image->get_width() * noise_image->get_height() * 3.0), "The noise texture should not be all white");
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CHECK_MESSAGE(avg_color.g == doctest::Approx(0.0), "The noise texture should not have any green when modulated correctly by the color ramp");
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}
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void check_normal_map() {
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const Ref<Image> noise_image = texture->get_image();
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CHECK(noise_image.is_valid());
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CHECK(noise_image->get_width() == texture->get_width());
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CHECK(noise_image->get_height() == texture->get_height());
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CHECK(noise_image->get_format() == Image::FORMAT_RGBA8);
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CHECK_FALSE(noise_image->has_mipmaps());
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Color avg_color = compute_average_color(noise_image);
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// Check for the characteristic color distribution (for tangent space) of a normal map.
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CHECK(avg_color.r == doctest::Approx(0.5).epsilon(0.05));
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CHECK(avg_color.g == doctest::Approx(0.5).epsilon(0.05));
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CHECK(avg_color.b == doctest::Approx(1.0).epsilon(0.05));
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}
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void check_seamless_texture_grayscale() {
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const Ref<Image> noise_image = texture->get_image();
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CHECK(noise_image.is_valid());
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CHECK(noise_image->get_width() == texture->get_width());
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CHECK(noise_image->get_height() == texture->get_height());
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CHECK(noise_image->get_format() == Image::FORMAT_L8);
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Color avg_color = compute_average_color(noise_image);
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// Since it's a grayscale image and every channel except the alpha channel has the
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// same values (conversion happens in Image::get_pixel) we only need to test one channel.
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CHECK(avg_color.r == doctest::Approx(0.5).epsilon(0.05));
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}
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void check_seamless_texture_rgba() {
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const Ref<Image> noise_image = texture->get_image();
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CHECK(noise_image.is_valid());
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CHECK(noise_image->get_width() == texture->get_width());
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CHECK(noise_image->get_height() == texture->get_height());
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CHECK(noise_image->get_format() == Image::FORMAT_RGBA8);
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// Check that the noise texture is modulated correctly by the color ramp (Gradient).
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Color avg_color = compute_average_color(noise_image);
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// We use a default (black to white) gradient, so the average of the red, green and blue channels should be the same.
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CHECK(avg_color.r == doctest::Approx(0.5).epsilon(0.05));
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CHECK(avg_color.g == doctest::Approx(0.5).epsilon(0.05));
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CHECK(avg_color.b == doctest::Approx(0.5).epsilon(0.05));
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}
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};
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TEST_CASE("[NoiseTexture][SceneTree] Getter and setter") {
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Ref<NoiseTexture2D> noise_texture = memnew(NoiseTexture2D);
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Ref<FastNoiseLite> noise = memnew(FastNoiseLite);
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noise_texture->set_noise(noise);
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CHECK(noise_texture->get_noise() == noise);
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noise_texture->set_noise(nullptr);
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CHECK(noise_texture->get_noise() == nullptr);
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noise_texture->set_width(8);
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noise_texture->set_height(4);
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CHECK(noise_texture->get_width() == 8);
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CHECK(noise_texture->get_height() == 4);
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ERR_PRINT_OFF;
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noise_texture->set_width(-1);
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noise_texture->set_height(-1);
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ERR_PRINT_ON;
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CHECK(noise_texture->get_width() == 8);
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CHECK(noise_texture->get_height() == 4);
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noise_texture->set_invert(true);
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CHECK(noise_texture->get_invert() == true);
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noise_texture->set_invert(false);
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CHECK(noise_texture->get_invert() == false);
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noise_texture->set_in_3d_space(true);
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CHECK(noise_texture->is_in_3d_space() == true);
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noise_texture->set_in_3d_space(false);
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CHECK(noise_texture->is_in_3d_space() == false);
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noise_texture->set_generate_mipmaps(true);
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CHECK(noise_texture->is_generating_mipmaps() == true);
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noise_texture->set_generate_mipmaps(false);
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CHECK(noise_texture->is_generating_mipmaps() == false);
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noise_texture->set_seamless(true);
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CHECK(noise_texture->get_seamless() == true);
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noise_texture->set_seamless(false);
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CHECK(noise_texture->get_seamless() == false);
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noise_texture->set_seamless_blend_skirt(0.45);
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CHECK(noise_texture->get_seamless_blend_skirt() == doctest::Approx(0.45));
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ERR_PRINT_OFF;
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noise_texture->set_seamless_blend_skirt(-1.0);
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noise_texture->set_seamless_blend_skirt(2.0);
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CHECK(noise_texture->get_seamless_blend_skirt() == doctest::Approx(0.45));
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ERR_PRINT_ON;
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noise_texture->set_as_normal_map(true);
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CHECK(noise_texture->is_normal_map() == true);
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noise_texture->set_as_normal_map(false);
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CHECK(noise_texture->is_normal_map() == false);
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noise_texture->set_bump_strength(0.168);
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CHECK(noise_texture->get_bump_strength() == doctest::Approx(0.168));
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Ref<Gradient> gradient = memnew(Gradient);
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noise_texture->set_color_ramp(gradient);
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CHECK(noise_texture->get_color_ramp() == gradient);
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noise_texture->set_color_ramp(nullptr);
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CHECK(noise_texture->get_color_ramp() == nullptr);
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}
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TEST_CASE("[NoiseTexture2D][SceneTree] Generating a basic noise texture with mipmaps and color ramp modulation") {
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Ref<NoiseTexture2D> noise_texture = memnew(NoiseTexture2D);
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Ref<FastNoiseLite> noise = memnew(FastNoiseLite);
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noise_texture->set_noise(noise);
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Ref<Gradient> gradient = memnew(Gradient);
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Vector<Gradient::Point> points;
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points.push_back({ 0.0, Color(1, 0, 0) });
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points.push_back({ 1.0, Color(0, 0, 1) });
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gradient->set_points(points);
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noise_texture->set_color_ramp(gradient);
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noise_texture->set_width(16);
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noise_texture->set_height(16);
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noise_texture->set_generate_mipmaps(true);
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Ref<NoiseTextureTester> tester = memnew(NoiseTextureTester(noise_texture.ptr()));
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noise_texture->connect("changed", callable_mp(tester.ptr(), &NoiseTextureTester::check_mip_and_color_ramp));
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MessageQueue::get_singleton()->flush();
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}
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TEST_CASE("[NoiseTexture2D][SceneTree] Generating a normal map without mipmaps") {
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Ref<NoiseTexture2D> noise_texture = memnew(NoiseTexture2D);
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Ref<FastNoiseLite> noise = memnew(FastNoiseLite);
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noise->set_frequency(0.5);
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noise_texture->set_noise(noise);
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noise_texture->set_width(16);
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noise_texture->set_height(16);
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noise_texture->set_as_normal_map(true);
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noise_texture->set_bump_strength(0.5);
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noise_texture->set_generate_mipmaps(false);
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Ref<NoiseTextureTester> tester = memnew(NoiseTextureTester(noise_texture.ptr()));
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noise_texture->connect("changed", callable_mp(tester.ptr(), &NoiseTextureTester::check_normal_map));
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MessageQueue::get_singleton()->flush();
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}
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TEST_CASE("[NoiseTexture2D][SceneTree] Generating a seamless noise texture") {
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Ref<NoiseTexture2D> noise_texture = memnew(NoiseTexture2D);
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Ref<FastNoiseLite> noise = memnew(FastNoiseLite);
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noise->set_frequency(0.5);
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noise_texture->set_noise(noise);
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noise_texture->set_width(16);
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noise_texture->set_height(16);
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noise_texture->set_seamless(true);
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Ref<NoiseTextureTester> tester = memnew(NoiseTextureTester(noise_texture.ptr()));
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SUBCASE("Grayscale(L8) 16x16, with seamless blend skirt of 0.05") {
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noise_texture->set_seamless_blend_skirt(0.05);
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noise_texture->connect("changed", callable_mp(tester.ptr(), &NoiseTextureTester::check_seamless_texture_grayscale));
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MessageQueue::get_singleton()->flush();
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}
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SUBCASE("16x16 modulated with default (transparent)black and white gradient (RGBA8), with seamless blend skirt of 1.0") {
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Ref<Gradient> gradient = memnew(Gradient);
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Vector<Gradient::Point> points;
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points.push_back({ 0.0, Color(0, 0, 0, 0) });
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points.push_back({ 1.0, Color(1, 1, 1, 1) });
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gradient->set_points(points);
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noise_texture->set_color_ramp(gradient);
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noise_texture->set_seamless_blend_skirt(1.0);
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noise_texture->connect("changed", callable_mp(tester.ptr(), &NoiseTextureTester::check_seamless_texture_rgba));
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MessageQueue::get_singleton()->flush();
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}
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}
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} //namespace TestNoiseTexture2D
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#endif // TEST_NOISE_TEXTURE_2D_H
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