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- /*
- * Copyright (C) 2020 Christopher J. Howard
- *
- * This file is part of Antkeeper source code.
- *
- * Antkeeper source code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Antkeeper source code is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
- */
-
- #ifndef ANTKEEPER_BOUNDING_VOLUME_HPP
- #define ANTKEEPER_BOUNDING_VOLUME_HPP
-
- #include "math/math.hpp"
- #include <stdexcept>
-
- using math::vector;
-
- template <class T>
- struct sphere;
- template <class T>
- struct aabb;
-
- /// Enumerates bounding volume types.
- enum class bounding_volume_type
- {
- aabb, ///< Indicates the bounding volume is an axis-aligned bounding box.
- sphere, ///< Indicates the bounding volume is a sphere.
- convex_hull ///< Indicates the bounding volume is a convex hull.
- };
-
- /**
- * Abstract base class for bounding volumes.
- *
- * @tparam T Scalar type.
- */
- template <class T>
- class bounding_volume
- {
- public:
- /// Returns the enumerated type of this bounding volume.
- virtual bounding_volume_type get_bounding_volume_type() const = 0;
-
- /// Tests for intersection between this bounding volume and a bounding sphere.
- virtual bool intersects(const sphere<T>& sphere) const = 0;
-
- /// Tests for intersection between this bounding volume and an axis-aligned bounding box.
- virtual bool intersects(const aabb<T>& aabb) const = 0;
-
- /// Tests whether this bounding volume contains a sphere.
- virtual bool contains(const sphere<T>& sphere) const = 0;
-
- /// Tests whether this bounding volume contains an axis-aligned bounding box.
- virtual bool contains(const aabb<T>& aabb) const = 0;
-
- /// Tests whether this bounding volume contains a point.
- virtual bool contains(const vector<T, 3>& point) const = 0;
-
- /// Tests for intersection between this bounding volume and another bounding volume.
- bool intersects(const bounding_volume& volume) const;
- };
-
- /// Tests for intersection between this bounding volume and another bounding volume.
- template <class T>
- bool bounding_volume<T>::intersects(const bounding_volume& volume) const
- {
- const bounding_volume_type type = volume.get_bounding_volume_type();
- switch (type)
- {
- case bounding_volume_type::sphere:
- return intersects(static_cast<const sphere<T>&>(volume));
- break;
-
- case bounding_volume_type::aabb:
- return intersects(static_cast<const aabb<T>&>(volume));
- break;
-
- default:
- throw std::runtime_error("unimplemented");
- break;
- }
- }
-
- #endif // ANTKEEPER_BOUNDING_VOLUME_HPP
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