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46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
/*
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* Copyright (C) 2007 David Adam
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifndef __D3DX8MATH_INL__
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#define __D3DX8MATH_INL__
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extern inline FLOAT D3DXVec2CCW(CONST D3DXVECTOR2 *pv1, CONST D3DXVECTOR2 *pv2)
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{
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if ( !pv1 || !pv2) return 0.0f;
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return ( (pv1->x) * (pv2->y) - (pv1->y) * (pv2->x) );
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}
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extern inline FLOAT D3DXVec2Dot(CONST D3DXVECTOR2 *pv1, CONST D3DXVECTOR2 *pv2)
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{
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if ( !pv1 || !pv2) return 0.0f;
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return ( (pv1->x * pv2->x + pv1->y * pv2->y) );
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}
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extern inline FLOAT D3DXVec2Length(CONST D3DXVECTOR2 *pv)
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{
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if (!pv) return 0.0f;
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return sqrt( (pv->x) * (pv->x) + (pv->y) * (pv->y) );
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}
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extern inline FLOAT D3DXVec2LengthSq(CONST D3DXVECTOR2 *pv)
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{
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if (!pv) return 0.0f;
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return( (pv->x) * (pv->x) + (pv->y) * (pv->y) );
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}
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#endif
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