AnimTestbed/3rdparty/ozz-animation/include/ozz/base/maths/box.h

85 lines
3.6 KiB
C++

//----------------------------------------------------------------------------//
// //
// ozz-animation is hosted at http://github.com/guillaumeblanc/ozz-animation //
// and distributed under the MIT License (MIT). //
// //
// Copyright (c) Guillaume Blanc //
// //
// Permission is hereby granted, free of charge, to any person obtaining a //
// copy of this software and associated documentation files (the "Software"), //
// to deal in the Software without restriction, including without limitation //
// the rights to use, copy, modify, merge, publish, distribute, sublicense, //
// and/or sell copies of the Software, and to permit persons to whom the //
// Software is furnished to do so, subject to the following conditions: //
// //
// The above copyright notice and this permission notice shall be included in //
// all copies or substantial portions of the Software. //
// //
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR //
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, //
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL //
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER //
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING //
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER //
// DEALINGS IN THE SOFTWARE. //
// //
//----------------------------------------------------------------------------//
#ifndef OZZ_OZZ_BASE_MATHS_BOX_H_
#define OZZ_OZZ_BASE_MATHS_BOX_H_
#include <cstddef>
#include "ozz/base/maths/vec_float.h"
namespace ozz {
namespace math {
// Matrix forward declaration.
struct Float4x4;
// Defines an axis aligned box.
struct OZZ_BASE_DLL Box {
// Constructs an invalid box.
Box();
// Constructs a box with the specified _min and _max bounds.
Box(const Float3& _min, const Float3& _max) : min(_min), max(_max) {}
// Constructs the smallest box that contains the _count points _points.
// _stride is the number of bytes between points.
explicit Box(const Float3& _point) : min(_point), max(_point) {}
// Constructs the smallest box that contains the _count points _points.
// _stride is the number of bytes between points, it must be greater or
// equal to sizeof(Float3).
Box(const Float3* _points, size_t _stride, size_t _count);
// Tests whether *this is a valid box.
bool is_valid() const { return min <= max; }
// Tests whether _p is within box bounds.
bool is_inside(const Float3& _p) const { return _p >= min && _p <= max; }
// Box's min and max bounds.
Float3 min;
Float3 max;
};
// Merges two boxes _a and _b.
// Both _a and _b can be invalid.
OZZ_INLINE Box Merge(const Box& _a, const Box& _b) {
if (!_a.is_valid()) {
return _b;
} else if (!_b.is_valid()) {
return _a;
}
return Box(Min(_a.min, _b.min), Max(_a.max, _b.max));
}
// Compute box transformation by a matrix.
OZZ_BASE_DLL Box TransformBox(const Float4x4& _matrix, const Box& _box);
} // namespace math
} // namespace ozz
#endif // OZZ_OZZ_BASE_MATHS_BOX_H_