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146 lines
2.8 KiB
C++
146 lines
2.8 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//=============================================================================//
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#ifndef DISP_VERTINDEX_H
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#define DISP_VERTINDEX_H
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#ifdef _WIN32
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#pragma once
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#endif
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#include "tier0/dbg.h"
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// ------------------------------------------------------------------------ //
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// Helper class used for indexing vertices in the 2D grid.
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// ------------------------------------------------------------------------ //
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class CVertIndex
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{
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public:
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CVertIndex() = default;
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CVertIndex( short ix, short iy );
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void Init( short ix, short iy );
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short& operator[]( short i );
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short const& operator[]( short i ) const;
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void operator+=( CVertIndex const &other );
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void operator-=( CVertIndex const &other );
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CVertIndex operator+( CVertIndex const &other ) const;
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CVertIndex operator-( CVertIndex const &other ) const;
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void operator<<=( int shift );
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void operator>>=( int shift );
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bool operator==( CVertIndex const &other ) const;
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bool operator!=( CVertIndex const &other ) const;
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public:
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short x, y;
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};
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// ------------------------------------------------------------------ //
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// Helper functions.
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// ------------------------------------------------------------------ //
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inline CVertIndex BuildOffsetVertIndex(
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CVertIndex const &nodeIndex,
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CVertIndex const &offset,
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int mul )
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{
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return CVertIndex( nodeIndex.x + offset.x * mul, nodeIndex.y + offset.y * mul );
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}
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// ------------------------------------------------------------------ //
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// CVertIndex inlines.
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// ------------------------------------------------------------------ //
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inline CVertIndex::CVertIndex( short ix, short iy )
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{
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x = ix;
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y = iy;
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}
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inline void CVertIndex::Init( short ix, short iy )
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{
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x = ix;
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y = iy;
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}
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inline short& CVertIndex::operator[]( short i )
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{
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Assert( i >= 0 && i <= 1 );
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return ((short*)this)[i];
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}
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inline short const& CVertIndex::operator[]( short i ) const
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{
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Assert( i >= 0 && i <= 1 );
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return ((short*)this)[i];
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}
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inline void CVertIndex::operator+=( CVertIndex const &other )
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{
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x += other.x;
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y += other.y;
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}
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inline void CVertIndex::operator-=( CVertIndex const &other )
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{
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x -= other.x;
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y -= other.y;
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}
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inline CVertIndex CVertIndex::operator+( CVertIndex const &other ) const
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{
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return CVertIndex( x + other.x, y + other.y );
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}
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inline CVertIndex CVertIndex::operator-( CVertIndex const &other ) const
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{
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return CVertIndex( x - other.x, y - other.y );
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}
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inline void CVertIndex::operator<<=( int shift )
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{
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x <<= shift;
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y <<= shift;
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}
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inline void CVertIndex::operator>>=( int shift )
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{
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x >>= shift;
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y >>= shift;
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}
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inline bool CVertIndex::operator==( CVertIndex const &other ) const
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{
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return x==other.x && y==other.y;
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}
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inline bool CVertIndex::operator!=( CVertIndex const &other ) const
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{
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return x!=other.x || y!=other.y;
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}
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#endif // DISP_VERTINDEX_H
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