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56 lines
2.3 KiB
56 lines
2.3 KiB
4 years ago
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#ifndef Magnum_Shaders_Implementation_lineMiterLimit_h
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#define Magnum_Shaders_Implementation_lineMiterLimit_h
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/*
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This file is part of Magnum.
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Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019,
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2020, 2021, 2022 Vladimír Vondruš <mosra@centrum.cz>
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*/
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#include "Magnum/Math/Functions.h"
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namespace Magnum { namespace Shaders { namespace Implementation {
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inline Float lineMiterLengthLimit(const char* const name, const Float limit) {
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#ifdef CORRADE_NO_ASSERT
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static_cast<void>(name);
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#endif
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CORRADE_ASSERT(limit >= 1.0f && !Math::isInf(limit),
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name << "expected a finite value greater than or equal to 1, got" << limit, {});
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/* Calculate the half-angle from the length and return a cosine of it */
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return Math::cos(2.0f*Math::asin(1.0f/limit));
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}
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inline Float lineMiterAngleLimit(const char* const name, const Rad limit) {
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using namespace Math::Literals;
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#ifdef CORRADE_NO_ASSERT
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static_cast<void>(name);
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#endif
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CORRADE_ASSERT(limit > 0.0_radf && limit <= Rad{Constants::pi()},
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name << "expected a value greater than 0° and less than or equal to 180°, got" << Float(Deg(limit)) << Debug::nospace << "°", {});
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/* Return a cosine of the angle */
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return Math::cos(limit);
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}
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}}}
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#endif
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