75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/*
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* PVVMUD a 3D MUD
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* Copyright (C) 1998-1999 Programvareverkstedet (pvv@pvv.org)
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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 General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "pvvmud.H"
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#include "plane.H"
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CPlane::CPlane(){
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m_a = m_b = m_c = m_d = 0.0;
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}
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CPlane::CPlane(const CVector & point,const CVector & normal){
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m_a = normal.getX();
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m_b = normal.getY();
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m_c = normal.getZ();
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m_d = -(m_a*point.getX()+m_b*point.getY()+m_c*point.getZ());
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// Normalize plane
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double k = 1/sqrt(m_a*m_a+m_b*m_b+m_c*m_c);
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m_a *= k; m_b *= k; m_c *= k; m_d *= k;
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}
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CPlane::CPlane(const CVertex & point,const CVector & normal){
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CVector vector(point);
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*this = CPlane(vector,normal);
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}
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CPlane::CPlane(const CVertex & v1,const CVertex & v2,const CVertex & v3){
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CVector edge = v2-v1;
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*this = CPlane(v1,edge.cross(v3-v2));
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}
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double CPlane::distance(const CVector & position){
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return (m_a*position.getX()+m_b*position.getY()+m_c*position.getZ()+m_d);
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}
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double CPlane::getA() const {
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return m_a;
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}
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double CPlane::getB() const {
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return m_b;
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}
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double CPlane::getC() const {
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return m_c;
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}
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double CPlane::getD() const {
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return m_d;
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}
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ostream& operator<<(ostream&s,const CPlane& p){
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return s << "(" << p.getA() << "," << p.getB() << ","
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<< p.getC() << "," << p.getD() << ")";
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}
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