vladislavbelov
ffc4a56b9f
Fixes #6846 Differential Revision: https://code.wildfiregames.com/D5185 This was SVN commit r27965.
71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
/* Copyright (C) 2021 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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/*
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* CFrustum is a collection of planes which define a viewing space.
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*/
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/*
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Usually associated with the camera, there are 6 planes which define the
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view pyramid. But we allow more planes per frustum which may be used for
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portal rendering, where a portal may have 3 or more edges.
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*/
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#ifndef INCLUDED_FRUSTUM
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#define INCLUDED_FRUSTUM
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#include "maths/Plane.h"
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class CBoundingBoxAligned;
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class CMatrix3D;
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class CFrustum
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{
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public:
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CFrustum();
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~CFrustum();
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// Set the number of planes to use for calculations. This is clamped to
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// [0, MAX_NUM_FRUSTUM_PLANES].
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void SetNumPlanes(size_t num);
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size_t GetNumPlanes() const { return m_NumPlanes; }
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void AddPlane(const CPlane& plane);
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void Transform(const CMatrix3D& m);
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// The following methods return true if the shape is
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// partially or completely in front of the frustum planes.
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bool IsPointVisible(const CVector3D& point) const;
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bool DoesSegmentIntersect(const CVector3D& start, const CVector3D& end) const;
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bool IsSphereVisible(const CVector3D& center, float radius) const;
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bool IsBoxVisible(const CVector3D& position, const CBoundingBoxAligned& bounds) const;
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bool IsBoxVisible(const CBoundingBoxAligned& bounds) const;
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CPlane& operator[](size_t idx) { return m_Planes[idx]; }
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const CPlane& operator[](size_t idx) const { return m_Planes[idx]; }
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private:
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static const size_t MAX_NUM_FRUSTUM_PLANES = 10;
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CPlane m_Planes[MAX_NUM_FRUSTUM_PLANES];
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size_t m_NumPlanes;
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};
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#endif // INCLUDED_FRUSTUM
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