forked from FWGS/Paranoia2
60 lines
2.2 KiB
C++
60 lines
2.2 KiB
C++
/*
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gl_frustum.h - frustum test implementation class
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this code written for Paranoia 2: Savior modification
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Copyright (C) 2014 Uncle Mike
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This program 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 3 of the License, or
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(at your option) any later version.
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This program 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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#ifndef GL_FRUSTUM_H
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#define GL_FRUSTUM_H
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// don't change this order
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#define FRUSTUM_LEFT 0
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#define FRUSTUM_RIGHT 1
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#define FRUSTUM_BOTTOM 2
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#define FRUSTUM_TOP 3
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#define FRUSTUM_FAR 4
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#define FRUSTUM_NEAR 5
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#define FRUSTUM_PLANES 6
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class CFrustum
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{
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public:
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void InitProjection( const matrix4x4 &view, float flZNear, float flZFar, float flFovX, float flFovY );
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void InitOrthogonal( const matrix4x4 &view, float xLeft, float xRight, float yBottom, float yTop, float flZNear, float flZFar );
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void InitBoxFrustum( const Vector &org, float radius ); // used for pointlights
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void InitProjectionFromMatrix( const matrix4x4 &projection );
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void SetPlane( int side, const mplane_t *plane ) { planes[side] = *plane; }
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void SetPlane( int side, const Vector &vecNormal, float flDist );
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void NormalizePlane( int side );
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const mplane_t *GetPlane( int side ) const { return &planes[side]; }
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const mplane_t *GetPlanes( void ) const { return &planes[0]; }
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unsigned int GetClipFlags( void ) const { return clipFlags; }
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void ComputeFrustumBounds( Vector &mins, Vector &maxs );
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void ComputeFrustumCorners( Vector bbox[8] );
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void DrawFrustumDebug( void );
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void ClearFrustum( void );
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// cull methods
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bool CullBox( const Vector &mins, const Vector &maxs, int userClipFlags = 0 );
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bool CullSphere( const Vector ¢re, float radius, int userClipFlags = 0 );
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bool CullFrustum( CFrustum *frustum, int userClipFlags = 0 );
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// plane manipulating
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void EnablePlane( int side );
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void DisablePlane( int side );
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private:
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mplane_t planes[FRUSTUM_PLANES];
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unsigned int clipFlags;
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};
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#endif//GL_FRUSTUM_H
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