50 lines
1.7 KiB
C++
50 lines
1.7 KiB
C++
//========= Copyright © 1996-2009, Valve Corporation, All rights reserved. ============//
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//
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// Purpose: 2d line occlusion for Fog of War
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//
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// $NoKeywords: $
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//=====================================================================================//
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#ifndef FOW_LINEOCCLUDER_H
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#define FOW_LINEOCCLUDER_H
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#if defined( COMPILER_MSVC )
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#pragma once
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#endif
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#include "mathlib/vector.h"
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#include "fow_2dplane.h"
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class CFoW;
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class CFoW_Viewer;
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class CFoW_LineOccluder
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{
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public:
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// construct a line occluder from the given points. the normal is supplied, though if it doesn't match up with the points, then the points are swapped.
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CFoW_LineOccluder( float bx, float by, float ex, float ey, Vector2D &vNormal, int nSliceNum );
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CFoW_LineOccluder( Vector2D &vStart, Vector2D &vEnd, CFOW_2DPlane &Plane, int nSliceNum );
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// get the starting point as determined by the normal
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inline Vector2D &GetStart( void ) { return m_vStart; }
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// get the ending point as determined by the normal
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inline Vector2D &GetEnd( void ) { return m_vEnd; }
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// get the plane normal
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inline Vector2D GetPlaneNormal( void ) { return m_Plane.GetNormal(); }
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// get the plane normal
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inline float GetPlaneDistance( void ) { return m_Plane.GetDistance(); }
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// get the slice index this occluder belongs to
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inline int GetSliceNum( void ) { return m_nSliceNum; }
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// determine the occlusion of this line for the viewer
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void ObstructViewer( CFoW *pFoW, CFoW_Viewer *pViewer );
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private:
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Vector2D m_vStart; // the starting point as determined by the normal
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Vector2D m_vEnd; // the ending point as determined by the normal
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CFOW_2DPlane m_Plane; // the plane that is formed
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int m_nSliceNum; // the slice index of this occluder
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};
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#endif // FOW_LINEOCCLUDER_H
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