Ykkrosh
fe3315376c
BoundingSphere is similar to a bounding box, but more spherical. SOverlaySphere is useful for visualising BoundingSphere (it's quite inefficient and should only be used for debug functionality). Normalise the camera frustum clipping planes, so that IsSphereVisible gives the correct result. This was SVN commit r15261.
61 lines
1.7 KiB
C++
61 lines
1.7 KiB
C++
/* Copyright (C) 2014 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef INCLUDED_BOUNDINGSPHERE
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#define INCLUDED_BOUNDINGSPHERE
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#include "maths/BoundingBoxAligned.h"
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#include "maths/Vector3D.h"
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class CBoundingSphere
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{
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private:
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CVector3D m_Center;
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float m_Radius;
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public:
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CBoundingSphere() : m_Radius(0) { }
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CBoundingSphere(const CVector3D& center, float radius) : m_Center(center), m_Radius(radius) { }
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/**
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* Construct a bounding sphere that encompasses a bounding box
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* swept through all possible rotations around the origin.
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*/
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static CBoundingSphere FromSweptBox(const CBoundingBoxAligned& bbox)
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{
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float maxX = std::max(fabsf(bbox[0].X), fabsf(bbox[1].X));
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float maxY = std::max(fabsf(bbox[0].Y), fabsf(bbox[1].Y));
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float maxZ = std::max(fabsf(bbox[0].Z), fabsf(bbox[1].Z));
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float radius = sqrtf(maxX*maxX + maxY*maxY + maxZ*maxZ);
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return CBoundingSphere(CVector3D(0.f, 0.f, 0.f), radius);
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}
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const CVector3D& GetCenter()
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{
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return m_Center;
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}
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float GetRadius() const
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{
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return m_Radius;
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}
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};
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#endif // INCLUDED_BOUNDINGSPHERE
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