libcruft-util/geom/ops.hpp

/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Copyright 2015-2018 Danny Robson <danny@nerdcruft.net>
 */

#ifndef __UTIL_GEOM_OPS_HPP
#define __UTIL_GEOM_OPS_HPP

#include "./fwd.hpp"
#include "../point.hpp"

#include <type_traits>


///////////////////////////////////////////////////////////////////////////////
namespace util::geom {
    template <
        size_t S,
        typename T,
        template <size_t,typename> class A,
        template <size_t,typename> class B
    >
    bool
    intersects (A<S,T>, B<S,T>);

    template <
        size_t S,
        typename T,
        template <size_t,typename> class A,
        template <size_t,typename> class B
    >
    T
    distance2 (A<S,T>, B<S,T>);

    // disable distance for point-point arguments given it's already
    // explicitly specified in the point header.
    template <
        size_t S,
        typename T,
        template <size_t,typename> class A,
        template <size_t,typename> class B,
        typename = std::enable_if_t<
            !std::is_same_v<util::point<S,T>, A> &&
            !std::is_same_v<util::point<S,T>, B>
        >
    >
    T
    distance (A<S,T>, B<S,T>);

    template <
        size_t S,
        typename T,
        template <size_t,typename> class K
    >
    aabb<S,T>
    bounds (K<S,T>);

    template <
        size_t S,
        typename T,
        template <size_t,typename> class K
    >
    T
    diameter (K<S,T>);

    template <
        size_t S,
        typename T,
        template <size_t,typename> class K
    >
    point<S,T>
    closest (K<S,T>, point<S,T>);

    template <
        size_t S,
        typename T,
        template <size_t,typename> class K
    >
    vector<S,T>
    magnitude (K<S,T>);

    template <
        size_t S,
        typename T,
        template <size_t,typename> class K
    >
    K<S,T>
    scale (K<S,T>, T);
}

#endif