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// Copyright 2018 The Draco Authors.
//
// 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.
//
#ifndef DRACO_CORE_BOUNDING_BOX_H_
#define DRACO_CORE_BOUNDING_BOX_H_
#include "draco/core/vector_d.h"
namespace draco {
// Class for computing the bounding box of points in 3D space.
class BoundingBox {
public:
// Creates bounding box object with minimum and maximum points initialized to
// the largest positive and the smallest negative values, respectively. The
// resulting abstract bounding box effectively has no points and can be
// updated by providing any point to Update() method.
BoundingBox();
// Creates bounding box object with minimum and maximum points initialized to
// |min_point| and |max_point|, respectively.
BoundingBox(const Vector3f &min_point, const Vector3f &max_point);
// Returns the minimum point of the bounding box.
inline const Vector3f &GetMinPoint() const { return min_point_; }
// Returns the maximum point of the bounding box.
inline const Vector3f &GetMaxPoint() const { return max_point_; }
// Conditionally updates the bounding box with a given |new_point|.
void Update(const Vector3f &new_point) {
for (int i = 0; i < 3; i++) {
if (new_point[i] < min_point_[i]) {
min_point_[i] = new_point[i];
}
if (new_point[i] > max_point_[i]) {
max_point_[i] = new_point[i];
}
}
}
// Updates bounding box with minimum and maximum points of the |other|
// bounding box.
void Update(const BoundingBox &other) {
Update(other.GetMinPoint());
Update(other.GetMaxPoint());
}
// Returns the size of the bounding box along each axis.
Vector3f Size() const { return max_point_ - min_point_; }
// Returns the center of the bounding box.
Vector3f Center() const { return (min_point_ + max_point_) / 2; }
private:
Vector3f min_point_;
Vector3f max_point_;
};
} // namespace draco
#endif // DRACO_CORE_BOUNDING_BOX_H_
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