85 lines
2.2 KiB
C++
85 lines
2.2 KiB
C++
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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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 Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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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 Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef NL_PLANE_INLINE_H
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#define NL_PLANE_INLINE_H
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namespace NLMISC
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{
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//============================================================
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inline CVector CPlane::getNormal() const
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{
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return CVector(a,b,c);
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}
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//============================================================
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inline float CPlane::distance(const CVector &v) const
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{
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CPlane p= normed();
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return (float)fabs(p*v);
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}
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//============================================================
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inline float CPlane::operator*(const CVector &p) const
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{
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return a*p.x + b*p.y + c*p.z + d;
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}
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//============================================================
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inline CVector CPlane::intersect(const CVector &p0,const CVector &p1) const
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{
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float decal;
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float da= (*this)*p0;
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float db= (*this)*p1;
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if(db-da == 0)
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return p0;
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decal= ( 0-da ) / ( db - da );
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return p0 + (p1-p0)*decal;
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}
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//============================================================
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inline CVector CPlane::project(const CVector &p0) const
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{
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return intersect(p0, p0+getNormal());
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}
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//============================================================
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inline void CPlane::normalize()
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{
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float n= getNormal().norm();
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if(n)
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{
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float oon= 1.0f/n;
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a*= oon;
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b*= oon;
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c*= oon;
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d*= oon;
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}
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}
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//============================================================
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inline CPlane CPlane::normed() const
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{
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CPlane ret= *this;
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ret.normalize();
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return ret;
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}
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}
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#endif // NL_PLANE_H
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/* End of plane.h */
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