initial commit, 4.5 stable

modules/noise/tests/test_noise_texture_3d.h

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+/**************************************************************************/
+/*  test_noise_texture_3d.h                                               */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* 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.                 */
+/**************************************************************************/
+
+#pragma once
+
+#include "../noise_texture_3d.h"
+
+#include "tests/test_macros.h"
+
+namespace TestNoiseTexture3D {
+
+class NoiseTexture3DTester : public RefCounted {
+	GDCLASS(NoiseTexture3DTester, RefCounted);
+
+	const NoiseTexture3D *const texture;
+
+public:
+	NoiseTexture3DTester(const NoiseTexture3D *const p_texture) :
+			texture{ p_texture } {}
+
+	Color compute_average_color(const Ref<Image> &p_noise_image) {
+		Color r_avg_color{};
+
+		for (int i = 0; i < p_noise_image->get_width(); ++i) {
+			for (int j = 0; j < p_noise_image->get_height(); ++j) {
+				const Color pixel = p_noise_image->get_pixel(i, j);
+				r_avg_color += pixel;
+			}
+		}
+
+		int pixel_count = p_noise_image->get_width() * p_noise_image->get_height();
+		r_avg_color /= pixel_count;
+		return r_avg_color;
+	}
+
+	void check_mip_and_color_ramp() {
+		const Vector<Ref<Image>> noise_data = texture->get_data();
+
+		for (int i = 0; i < noise_data.size(); i++) {
+			const Ref<Image> noise_image = noise_data[i];
+
+			CHECK(noise_image.is_valid());
+			CHECK(noise_image->get_width() == texture->get_width());
+			CHECK(noise_image->get_height() == texture->get_height());
+
+			CHECK(noise_image->get_format() == Image::FORMAT_RGBA8);
+			CHECK(!noise_image->has_mipmaps());
+
+			Color avg_color = compute_average_color(noise_image);
+
+			// Check that the noise texture is modulated correctly by the color ramp (Gradient).
+			CHECK_FALSE_MESSAGE((avg_color.r + avg_color.g + avg_color.b) == doctest::Approx(0.0), "The noise texture should not be all black");
+			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");
+			CHECK_MESSAGE(avg_color.g == doctest::Approx(0.0), "The noise texture should not have any green when modulated correctly by the color ramp");
+		}
+	}
+
+	void check_seamless_texture_grayscale() {
+		const Vector<Ref<Image>> noise_data = texture->get_data();
+
+		for (int i = 0; i < noise_data.size(); i++) {
+			const Ref<Image> noise_image = noise_data[i];
+
+			CHECK(noise_image.is_valid());
+			CHECK(noise_image->get_width() == texture->get_width());
+			CHECK(noise_image->get_height() == texture->get_height());
+
+			CHECK(noise_image->get_format() == Image::FORMAT_L8);
+
+			Color avg_color = compute_average_color(noise_image);
+
+			// Since it's a grayscale image and every channel except the alpha channel has the
+			// same values (conversion happens in Image::get_pixel) we only need to test one channel.
+			CHECK(avg_color.r == doctest::Approx(0.5).epsilon(0.05));
+		}
+	}
+
+	void check_seamless_texture_rgba() {
+		const Vector<Ref<Image>> noise_data = texture->get_data();
+
+		for (int i = 0; i < noise_data.size(); i++) {
+			const Ref<Image> noise_image = noise_data[i];
+
+			CHECK(noise_image.is_valid());
+			CHECK(noise_image->get_width() == texture->get_width());
+			CHECK(noise_image->get_height() == texture->get_height());
+
+			CHECK(noise_image->get_format() == Image::FORMAT_RGBA8);
+
+			// Check that the noise texture is modulated correctly by the color ramp (Gradient).
+			Color avg_color = compute_average_color(noise_image);
+
+			// We use a default (black to white) gradient, so the average of the red, green and blue channels should be the same.
+			CHECK(avg_color.r == doctest::Approx(0.5).epsilon(0.05));
+			CHECK(avg_color.g == doctest::Approx(0.5).epsilon(0.05));
+			CHECK(avg_color.b == doctest::Approx(0.5).epsilon(0.05));
+		}
+	}
+};
+
+TEST_CASE("[NoiseTexture][SceneTree] Getter and setter") {
+	Ref<NoiseTexture3D> noise_texture = memnew(NoiseTexture3D);
+
+	Ref<FastNoiseLite> noise = memnew(FastNoiseLite);
+	noise_texture->set_noise(noise);
+	CHECK(noise_texture->get_noise() == noise);
+	noise_texture->set_noise(nullptr);
+	CHECK(noise_texture->get_noise().is_null());
+
+	noise_texture->set_width(8);
+	noise_texture->set_height(4);
+	noise_texture->set_depth(2);
+	CHECK(noise_texture->get_width() == 8);
+	CHECK(noise_texture->get_height() == 4);
+	CHECK(noise_texture->get_depth() == 2);
+
+	ERR_PRINT_OFF;
+	noise_texture->set_width(-1);
+	noise_texture->set_height(-1);
+	noise_texture->set_depth(-1);
+	ERR_PRINT_ON;
+	CHECK(noise_texture->get_width() == 8);
+	CHECK(noise_texture->get_height() == 4);
+	CHECK(noise_texture->get_depth() == 2);
+
+	noise_texture->set_invert(true);
+	CHECK(noise_texture->get_invert() == true);
+	noise_texture->set_invert(false);
+	CHECK(noise_texture->get_invert() == false);
+
+	noise_texture->set_seamless(true);
+	CHECK(noise_texture->get_seamless() == true);
+	noise_texture->set_seamless(false);
+	CHECK(noise_texture->get_seamless() == false);
+
+	noise_texture->set_seamless_blend_skirt(0.45);
+	CHECK(noise_texture->get_seamless_blend_skirt() == doctest::Approx(0.45));
+
+	ERR_PRINT_OFF;
+	noise_texture->set_seamless_blend_skirt(-1.0);
+	noise_texture->set_seamless_blend_skirt(2.0);
+	CHECK(noise_texture->get_seamless_blend_skirt() == doctest::Approx(0.45));
+	ERR_PRINT_ON;
+
+	Ref<Gradient> gradient = memnew(Gradient);
+	noise_texture->set_color_ramp(gradient);
+	CHECK(noise_texture->get_color_ramp() == gradient);
+	noise_texture->set_color_ramp(nullptr);
+	CHECK(noise_texture->get_color_ramp().is_null());
+}
+
+TEST_CASE("[NoiseTexture3D][SceneTree] Generating a basic noise texture with mipmaps and color ramp modulation") {
+	Ref<NoiseTexture3D> noise_texture = memnew(NoiseTexture3D);
+
+	Ref<FastNoiseLite> noise = memnew(FastNoiseLite);
+	noise_texture->set_noise(noise);
+
+	Ref<Gradient> gradient = memnew(Gradient);
+	Vector<float> offsets = { 0.0, 1.0 };
+	Vector<Color> colors = { Color(1, 0, 0), Color(0, 0, 1) };
+	gradient->set_offsets(offsets);
+	gradient->set_colors(colors);
+
+	noise_texture->set_color_ramp(gradient);
+	noise_texture->set_width(16);
+	noise_texture->set_height(16);
+	noise_texture->set_depth(16);
+
+	Ref<NoiseTexture3DTester> tester = memnew(NoiseTexture3DTester(noise_texture.ptr()));
+	noise_texture->connect_changed(callable_mp(tester.ptr(), &NoiseTexture3DTester::check_mip_and_color_ramp));
+	MessageQueue::get_singleton()->flush();
+}
+
+TEST_CASE("[NoiseTexture3D][SceneTree] Generating a seamless noise texture") {
+	Ref<NoiseTexture3D> noise_texture = memnew(NoiseTexture3D);
+
+	Ref<FastNoiseLite> noise = memnew(FastNoiseLite);
+	noise->set_frequency(0.5);
+	noise_texture->set_noise(noise);
+	noise_texture->set_width(16);
+	noise_texture->set_height(16);
+	noise_texture->set_depth(16);
+	noise_texture->set_seamless(true);
+
+	Ref<NoiseTexture3DTester> tester = memnew(NoiseTexture3DTester(noise_texture.ptr()));
+
+	SUBCASE("Grayscale(L8) 16x16x16, with seamless blend skirt of 0.05") {
+		noise_texture->set_seamless_blend_skirt(0.05);
+		noise_texture->connect_changed(callable_mp(tester.ptr(), &NoiseTexture3DTester::check_seamless_texture_grayscale));
+		MessageQueue::get_singleton()->flush();
+	}
+
+	SUBCASE("16x16x16 modulated with default (transparent)black and white gradient (RGBA8), with seamless blend skirt of 1.0") {
+		Ref<Gradient> gradient = memnew(Gradient);
+
+		Vector<float> offsets = { 0.0, 1.0 };
+		Vector<Color> colors = { Color(0, 0, 0, 0), Color(1, 1, 1, 1) };
+		gradient->set_offsets(offsets);
+		gradient->set_colors(colors);
+
+		noise_texture->set_color_ramp(gradient);
+		noise_texture->set_seamless_blend_skirt(1.0);
+		noise_texture->connect_changed(callable_mp(tester.ptr(), &NoiseTexture3DTester::check_seamless_texture_rgba));
+		MessageQueue::get_singleton()->flush();
+	}
+}
+
+} //namespace TestNoiseTexture3D