73 lines
2.4 KiB
C++
73 lines
2.4 KiB
C++
// Copyright 2018 The Draco Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#ifndef DRACO_CORE_BOUNDING_BOX_H_
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#define DRACO_CORE_BOUNDING_BOX_H_
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#include "draco/core/vector_d.h"
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namespace draco {
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// Class for computing the bounding box of points in 3D space.
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class BoundingBox {
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public:
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// Creates bounding box object with minimum and maximum points initialized to
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// the largest positive and the smallest negative values, respectively. The
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// resulting abstract bounding box effectively has no points and can be
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// updated by providing any point to Update() method.
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BoundingBox();
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// Creates bounding box object with minimum and maximum points initialized to
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// |min_point| and |max_point|, respectively.
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BoundingBox(const Vector3f &min_point, const Vector3f &max_point);
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// Returns the minimum point of the bounding box.
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inline const Vector3f &GetMinPoint() const { return min_point_; }
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// Returns the maximum point of the bounding box.
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inline const Vector3f &GetMaxPoint() const { return max_point_; }
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// Conditionally updates the bounding box with a given |new_point|.
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void Update(const Vector3f &new_point) {
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for (int i = 0; i < 3; i++) {
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if (new_point[i] < min_point_[i]) {
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min_point_[i] = new_point[i];
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}
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if (new_point[i] > max_point_[i]) {
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max_point_[i] = new_point[i];
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}
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}
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}
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// Updates bounding box with minimum and maximum points of the |other|
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// bounding box.
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void Update(const BoundingBox &other) {
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Update(other.GetMinPoint());
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Update(other.GetMaxPoint());
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}
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// Returns the size of the bounding box along each axis.
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Vector3f Size() const { return max_point_ - min_point_; }
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// Returns the center of the bounding box.
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Vector3f Center() const { return (min_point_ + max_point_) / 2; }
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private:
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Vector3f min_point_;
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Vector3f max_point_;
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};
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} // namespace draco
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#endif // DRACO_CORE_BOUNDING_BOX_H_
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