81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
#pragma once
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/*
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* Copyright (C) 2024 Brett Terpstra
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*
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* This program 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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* This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef IMAGE_GP_6_HELPER_H
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#define IMAGE_GP_6_HELPER_H
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#include <images.h>
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#include <stb_perlin.h>
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template<typename SINGLE_FUNC>
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constexpr static auto make_single(SINGLE_FUNC&& func)
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{
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return [func](const full_image_t& a) {
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full_image_t img{};
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for (blt::size_t i = 0; i < DATA_CHANNELS_SIZE; i++)
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img.rgb_data[i] = func(a.rgb_data[i]);
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return img;
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};
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}
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template<typename DOUBLE_FUNC>
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constexpr static auto make_double(DOUBLE_FUNC&& func)
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{
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return [func](const full_image_t& a, const full_image_t& b) {
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full_image_t img{};
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for (blt::size_t i = 0; i < DATA_CHANNELS_SIZE; i++)
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img.rgb_data[i] = func(a.rgb_data[i], b.rgb_data[i]);
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return img;
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};
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}
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struct context
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{
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float x, y;
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};
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inline context get_ctx(blt::size_t i)
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{
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context ctx{};
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i /= CHANNELS;
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ctx.y = std::floor(static_cast<float>(i) / static_cast<float>(IMAGE_SIZE));
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ctx.x = static_cast<float>(i) - (ctx.y * IMAGE_SIZE);
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return ctx;
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}
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inline context get_pop_ctx(blt::size_t i)
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{
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auto const sq = static_cast<float>(std::sqrt(POP_SIZE));
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context ctx{};
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ctx.y = std::floor(static_cast<float>(i) / static_cast<float>(sq));
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ctx.x = static_cast<float>(i) - (ctx.y * sq);
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return ctx;
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}
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inline blt::size_t get_index(blt::size_t x, blt::size_t y)
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{
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return y * IMAGE_SIZE + x;
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}
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inline float perlin_noise(float x, float y, float z)
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{
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return (stb_perlin_noise3(x, y, z, 0, 0, 0) + 1.0f) / 2.0f;
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}
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#endif //IMAGE_GP_6_HELPER_H
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