💿🐜 Antkeeper source code
https://antkeeper.com
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72 lines
1.8 KiB
72 lines
1.8 KiB
/*
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* Copyright (C) 2020 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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#ifndef ANTKEEPER_SDF_HPP
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#define ANTKEEPER_SDF_HPP
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#include <vmq/vmq.hpp>
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using namespace vmq::types;
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using namespace vmq::operators;
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/**
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* Contains signed distance functions.
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*/
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namespace sdf {
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inline float3 translate(const float3& sample, const float3& offset)
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{
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return sample - offset;
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}
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inline float sphere(const float3& p, float r)
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{
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return vmq::length(p) - r;
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}
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inline float cylinder(const float3& p, float r, float h)
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{
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float dx = std::abs(vmq::length(vmq::swizzle<0, 2>(p))) - r;
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float dy = std::abs(p[1]) - h;
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return std::min<float>(std::max<float>(dx, dy), 0.0f) + vmq::length(float2{std::max<float>(dx, 0.0f), std::max<float>(dy, 0.0f)});
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}
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inline float op_union(float a, float b)
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{
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return std::min<float>(a, b);
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}
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inline float op_difference(float a, float b)
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{
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return std::max<float>(-a, b);
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}
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inline float op_intersection(float a, float b)
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{
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return std::max<float>(a, b);
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}
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inline float op_round(float d, float r)
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{
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return d - r;
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}
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} // namespace sdf
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#endif // ANTKEEPER_SDF_HPP
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