💿🐜 Antkeeper source code
https://antkeeper.com
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101 lines
3.3 KiB
101 lines
3.3 KiB
/*
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* Copyright (C) 2023 Christopher J. Howard
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*
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* This file is part of Antkeeper source code.
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*
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* Antkeeper source code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Antkeeper source code is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "game/textures/cocoon-silk-sdf.hpp"
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#include <engine/math/noise/noise.hpp>
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#include <engine/utility/image.hpp>
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#include <engine/debug/log.hpp>
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#include <algorithm>
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#include <execution>
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#include <fstream>
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#include <stb/stb_image_write.h>
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void generate_cocoon_silk_sdf(std::filesystem::path path)
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{
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debug::log::info("Generating cocoon silk SDF image...");
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image img;
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img.format(1, 4);
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img.resize(2048, 2048);
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auto width = img.width();
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auto height = img.height();
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unsigned char* pixels = (unsigned char*)img.data();
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const float frequency = 100.0f;
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float scale_x = 1.0f / static_cast<float>(width - 1) * frequency;
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float scale_y = 1.0f / static_cast<float>(height - 1) * frequency;
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std::for_each
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(
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std::execution::par_unseq,
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img.begin<math::vec4<unsigned char>>(),
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img.end<math::vec4<unsigned char>>(),
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[pixels, width, height, scale_x, scale_y, frequency](auto& pixel)
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{
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const std::size_t i = &pixel - (math::vec4<unsigned char>*)pixels;
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const std::size_t y = i / width;
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const std::size_t x = i % width;
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const math::fvec2 position =
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{
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static_cast<float>(x) * scale_x,
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static_cast<float>(y) * scale_y
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};
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const auto
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[
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f1_sqr_distance,
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f1_displacement,
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f1_id,
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f1_edge_sqr_distance
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] = math::noise::voronoi::f1_edge<float, 2>(position, 1.0f, {frequency, frequency});
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const float f1_edge_distance = std::sqrt(f1_edge_sqr_distance);
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const float scale = 255.0f * (255.0f / 204.0f);
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pixel =
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{
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static_cast<unsigned char>(std::min(255.0f, f1_edge_distance * scale)),
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static_cast<unsigned char>(std::min(255.0f, f1_edge_distance * scale)),
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static_cast<unsigned char>(std::min(255.0f, f1_edge_distance * scale)),
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255
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};
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// const float f1_distance = std::sqrt(f1_sqr_distance);
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// const math::fvec2 uv = (position + f1_displacement) / frequency;
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// pixel =
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// {
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// static_cast<unsigned char>(std::min(255.0f, f1_distance * 255.0f)),
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// static_cast<unsigned char>(std::min(255.0f, uv[0] * 255.0f)),
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// static_cast<unsigned char>(std::min(255.0f, uv[1] * 255.0f)),
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// static_cast<unsigned char>(f1_id % 256)
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// };
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}
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);
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debug::log::info("Generated cocoon silk SDF image");
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debug::log::info("Saving cocoon silk SDF image to \"{}\"...", path.string());
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stbi_flip_vertically_on_write(1);
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stbi_write_png(path.string().c_str(), img.width(), img.height(), img.channel_count(), img.data(), img.width() * img.channel_count());
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debug::log::info("Saved cocoon silk SDF image to \"{}\"", path.string());
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}
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