83 lines
2.9 KiB
C++
83 lines
2.9 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 COSC_4P80_ASSIGNMENT_3_FUNCTIONS_H
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#define COSC_4P80_ASSIGNMENT_3_FUNCTIONS_H
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#include <assign3/fwdecl.h>
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#include <blt/std/ranges.h>
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namespace assign3
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{
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struct topology_function_t
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{
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/**
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* @param dist input - usually the distance
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* @param r time ratio - t / max_t
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* @return basis results
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*/
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[[nodiscard]] virtual Scalar call(Scalar dist, Scalar r) const = 0;
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/**
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* produces a non-time scaled r value for making the function activate at target_strength when a point is half_distance between two nodes
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* so for the example of unit distance 1, half distance is 0.5, target_strength is 0.5
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* this function will produce a value which can be time scaled for achieving this result at t=0
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*
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* this function can return a 1 to indicate this function doesn't care for this.
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*/
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[[nodiscard]] virtual Scalar scale(Scalar half_distance, Scalar target_strength) const = 0;
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virtual ~topology_function_t() = default;
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};
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struct gaussian_function_t final : public topology_function_t
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{
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[[nodiscard]] Scalar call(Scalar dist, Scalar r) const final;
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[[nodiscard]] Scalar scale(Scalar half_distance, Scalar target_strength) const final;
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};
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struct distance_function_t
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{
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[[nodiscard]] virtual Scalar distance(blt::span<const Scalar> x, blt::span<const Scalar> y) const = 0;
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virtual ~distance_function_t() = default;
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};
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struct euclidean_distance_function_t : public distance_function_t
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{
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[[nodiscard]] Scalar distance(blt::span<const Scalar> x, blt::span<const Scalar> y) const final;
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};
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struct toroidal_euclidean_distance_function_t : public distance_function_t
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{
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public:
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toroidal_euclidean_distance_function_t(blt::i32 width, blt::i32 height): width(width), height(height)
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{}
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[[nodiscard]] Scalar distance(blt::span<const Scalar> x, blt::span<const Scalar> y) const final;
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private:
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blt::i32 width, height;
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};
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}
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#endif //COSC_4P80_ASSIGNMENT_3_FUNCTIONS_H
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