BoundingSphere.h

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/* Copyright (C) 2019 Wildfire Games.
 * This file is part of 0 A.D.
 *
 * 0 A.D. 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 2 of the License, or
 * (at your option) any later version.
 *
 * 0 A.D. 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 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef INCLUDED_BOUNDINGSPHERE
#define INCLUDED_BOUNDINGSPHERE
 
#include "maths/Vector3D.h"
 
class CBoundingBoxAligned;
 
class CBoundingSphere
{
public:
    CBoundingSphere() : m_Radius(0.0f) { }
 
    CBoundingSphere(const CVector3D& center, float radius) : m_Center(center), m_Radius(radius) { }
 
    const CVector3D& GetCenter() const
    {
        return m_Center;
    }
 
    float GetRadius() const
    {
        return m_Radius;
    }
 
    /**
     * Construct a bounding sphere that encompasses a bounding box
     * swept through all possible rotations around the origin.
     */
    static CBoundingSphere FromSweptBox(const CBoundingBoxAligned& bbox);
 
    /**
     * Check if the ray, defined by an origin point and a direction unit vector
     * interesects with the sphere. The direction should be normalized.
     */
    bool RayIntersect(const CVector3D& origin, const CVector3D& dir) const;
 
private:
    CVector3D m_Center;
    float m_Radius;
};
 
#endif // INCLUDED_BOUNDINGSPHERE