54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
|
//========= Copyright <20> 1996-2009, Valve Corporation, All rights reserved. ============//
|
|||
|
|
//
|
|||
|
|
// Purpose: 2d plane routines for Fog of War
|
|||
|
|
//
|
|||
|
|
// $NoKeywords: $
|
|||
|
|
//=====================================================================================//
|
|||
|
|
|
|||
|
|
#ifndef FOW_2DPLANE_H
|
|||
|
|
#define FOW_2DPLANE_H
|
|||
|
|
#if defined( COMPILER_MSVC )
|
|||
|
|
#pragma once
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
#include "mathlib/vector.h"
|
|||
|
|
|
|||
|
|
class CFOW_2DPlane
|
|||
|
|
{
|
|||
|
|
public:
|
|||
|
|
CFOW_2DPlane( void ) { }
|
|||
|
|
// construct the plane from the given line segment
|
|||
|
|
CFOW_2DPlane( float bx, float by, float ex, float ey );
|
|||
|
|
// construct the plane from the given point and normal
|
|||
|
|
CFOW_2DPlane( float x, float y, Vector2D &vNormal );
|
|||
|
|
|
|||
|
|
CFOW_2DPlane( float flDistance, Vector2D &vNormal );
|
|||
|
|
|
|||
|
|
// init routine to generate the plane from the given line segment
|
|||
|
|
void Init( float bx, float by, float ex, float ey );
|
|||
|
|
// init routine to generate the plane from the given point and normal
|
|||
|
|
void Init( float x, float y, Vector2D &vNormal );
|
|||
|
|
|
|||
|
|
// returns the normal of the plane
|
|||
|
|
inline Vector2D &GetNormal( void ) { return m_vNormal; }
|
|||
|
|
|
|||
|
|
//
|
|||
|
|
inline float GetDistance( ) { return m_flDistance; }
|
|||
|
|
|
|||
|
|
|
|||
|
|
// returns true if the point is in front of the plane
|
|||
|
|
bool PointInFront( float px, float py );
|
|||
|
|
// returns the distance the point is from the plane
|
|||
|
|
float DistanceFrom( float px, float py );
|
|||
|
|
// finds the fraction from the starting point towards the normal along the line formed with ending point
|
|||
|
|
float DistanceFromLineStart( float bx, float by, float ex, float ey );
|
|||
|
|
// finds the fraction from the starting point towards the normal along the line formed with ending point
|
|||
|
|
float DistanceFromRay( float bx, float by, float dx, float dy );
|
|||
|
|
|
|||
|
|
private:
|
|||
|
|
Vector2D m_vNormal; // the normal of the plane
|
|||
|
|
float m_flDistance; // the plane distance
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
#endif // FOW_2DPLANE_H
|