Danny Robson
59c1c9cc9e
clang requires `A<S,T>` for the `enable_if` condition, and this provokes an ICE under GCC. A `requires` clause works identically and satisfies both compilers.
123 lines
2.7 KiB
C++
123 lines
2.7 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* Copyright 2015-2018 Danny Robson <danny@nerdcruft.net>
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*/
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#pragma once
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#include "./fwd.hpp"
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#include "../point.hpp"
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#include <type_traits>
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///////////////////////////////////////////////////////////////////////////////
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namespace cruft::geom {
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/// Tests whether any part of two shapes overlap.
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///
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/// Returns true even if the the edges of the shapes are co-linear.
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template <
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size_t S,
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typename T,
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template <size_t,typename> class A,
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template <size_t,typename> class B
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>
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bool
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intersects (A<S,T>, B<S,T>);
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/// Tests whether the entirety of shape `B` is inclusively contained
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/// within the shape `A`.
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template <
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size_t S,
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typename T,
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template<size_t,typename> class A,
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template<size_t,typename> class B
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>
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bool covers (A<S,T> const&, B<S,T> const&);
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/// Returns a minimum squared distance between two shapes.
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template <
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size_t S,
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typename T,
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template <size_t,typename> class A,
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template <size_t,typename> class B
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>
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T
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distance2 (A<S,T>, B<S,T>);
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// disable distance for point-point arguments given it's already
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// explicitly specified in the point header.
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template <
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size_t S,
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typename T,
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template <size_t,typename> class A,
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template <size_t,typename> class B
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>
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requires (
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!std::is_same_v<cruft::point<S,T>, A<S,T>> &&
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!std::is_same_v<cruft::point<S,T>, B<S,T>>
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)
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T
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distance (A<S,T>, B<S,T>);
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/// Returns an AABB for the supplied shape.
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template <
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size_t S,
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typename T,
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template <size_t,typename> class K
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>
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aabb<S,T>
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bounds (K<S,T>);
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/// Returns a bounding AABB for all supplied items
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template <typename... Args>
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auto
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bounds (Args &&...args)
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{
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return (bounds (args) | ...);
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}
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/// Returns a maximum distance across a shape.
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template <
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size_t S,
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typename T,
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template <size_t,typename> class K
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>
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T
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diameter (K<S,T>);
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/// Returns the closest point on a shape to the supplied point.
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template <
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size_t S,
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typename T,
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template <size_t,typename> class K
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>
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point<S,T>
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closest (K<S,T>, point<S,T>);
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template <
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size_t S,
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typename T,
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template <size_t,typename> class K
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>
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vector<S,T>
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magnitude (K<S,T>);
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template <
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size_t S,
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typename T,
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template <size_t,typename> class K
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>
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K<S,T>
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scale (K<S,T>, T);
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}
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