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55 lines
2.3 KiB
55 lines
2.3 KiB
#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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