111 lines
3.4 KiB
C++
111 lines
3.4 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 GRAPHS_FORCE_ALGORITHMS_H
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#define GRAPHS_FORCE_ALGORITHMS_H
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#include <string>
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#include <blt/std/types.h>
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#include <blt/math/vectors.h>
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#include <imgui.h>
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#include <graph_base.h>
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#include <config.h>
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class force_equation
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{
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public:
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using node_pair = const std::pair<blt::size_t, node_t>&;
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protected:
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float cooling_rate = conf::DEFAULT_COOLING_FACTOR;
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float min_cooling = conf::DEFAULT_MIN_COOLING;
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float initial_temperature = conf::DEFAULT_INITIAL_TEMPERATURE;
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struct equation_data
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{
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blt::vec2 unit, unit_inv;
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float mag, mag_sq;
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equation_data(blt::vec2 unit, blt::vec2 unit_inv, float mag, float mag_sq): unit(unit), unit_inv(unit_inv), mag(mag), mag_sq(mag_sq)
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{}
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};
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inline static blt::vec2 dir_v(node_pair v1, node_pair v2)
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{
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return v2.second.getPosition() - v1.second.getPosition();
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}
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static equation_data calc_data(node_pair v1, node_pair v2);
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public:
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[[nodiscard]] virtual blt::vec2 attr(node_pair v1, node_pair v2, const edge_t& edge) const = 0;
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[[nodiscard]] virtual blt::vec2 rep(node_pair v1, node_pair v2) const = 0;
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[[nodiscard]] virtual std::string name() const = 0;
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[[nodiscard]] virtual float cooling_factor(int t) const
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{
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return std::max(static_cast<float>(initial_temperature * std::pow(cooling_rate, t)), min_cooling);
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}
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void draw_inputs_base();
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virtual void draw_inputs()
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{}
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virtual ~force_equation() = default;
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};
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class Eades_equation : public force_equation
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{
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protected:
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float spring_constant = 12.0;
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public:
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[[nodiscard]] blt::vec2 attr(node_pair v1, node_pair v2, const edge_t& edge) const final;
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[[nodiscard]] blt::vec2 rep(node_pair v1, node_pair v2) const final;
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[[nodiscard]] std::string name() const final
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{
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return "Eades";
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}
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void draw_inputs() override;
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};
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class Fruchterman_Reingold_equation : public force_equation
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{
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public:
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[[nodiscard]] blt::vec2 attr(node_pair v1, node_pair v2, const edge_t& edge) const final;
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[[nodiscard]] blt::vec2 rep(node_pair v1, node_pair v2) const final;
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[[nodiscard]] float cooling_factor(int t) const override
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{
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return force_equation::cooling_factor(t) * 0.025f;
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}
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[[nodiscard]] std::string name() const final
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{
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return "Fruchterman & Reingold";
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}
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};
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#endif //GRAPHS_FORCE_ALGORITHMS_H
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