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Tuesday the 22nd of May 2012 @ 02:09am

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LibN2L N2L Home Older News Downloads Documentation (n2l5) Class Hierarchy Compound List File List n2l:: Members Functions Whole n2l:: Ref Documentation (libN2L-4) Class Hierarchy Compound List File List n2l:: Members Functions Whole n2l:: Ref Bugtracker Project Page Report a Bug Bug List Related Things Life 2130 Devel Game Journal

LibN2L-4 Library Code Reference Classes Compounds Files Members Method Index Full Reference cPlane3.h Go to the documentation of this file. /************************************************************************ Nova-2 Library (libN2L, or simply n2l) Game development C++ Library Copyright (C) 2002 Aaron Cameron This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA A copy of the GNU Lesser General Public License has been provided with this library in the file 'COPYING'. Contact information for the author of this library has been provided with this library in the file 'AUTHOR'. ************************************************************************/ #ifndef _n2l4_cPlane3_h #define _n2l4_cPlane3_h #include "n2l/n2l.h" #include "cVector3.h" namespace n2l { /**************************************************************************/ template <class TComponent> class cPlane3 { public: typedef cPlane3<TComponent> tThisPlane; typedef cVector3<TComponent,TComponent,TComponent> tVector; typedef TComponent tComponent; // Constructors /**********************************************************************/ cPlane3() { } /**********************************************************************/ cPlane3( const tVector &iNormal, const tComponent &iD ) : mNormal( iNormal ), mD( iD ) { } /**********************************************************************/ cPlane3( const tVector &iNormal, const tVector &iPoint ) : mNormal( iNormal ), mD( -mNormal.dot(iPoint) ) { } /**********************************************************************/ cPlane3( const tComponent &iA, const tComponent &iB, const tComponent &iC, const tComponent &iD ) : mNormal( iA,iB,iC ), mD( iD ) { } /**********************************************************************/ tThisPlane &set( const tVector &iNormal, const tVector &iPoint ) { mNormal = iNormal; mD = -mNormal.dot(iPoint); return *this; } /**********************************************************************/ void normal( const tVector &iNormal ) { mNormal = iNormal; } /**********************************************************************/ void normal( const tComponent &iA, const tComponent &iB, const tComponent &iC ) { mNormal.set(iA,iB,iC); } /**********************************************************************/ const tVector &normal() const { return mNormal; } /**********************************************************************/ void normalize() { TComponent mag = mNormal.magnitude(); mNormal.normalize(); mD /= mag; } /**********************************************************************/ void a( const tComponent &iA ) { mNormal.x(iA); } void b( const tComponent &iB ) { mNormal.y(iB); } void c( const tComponent &iC ) { mNormal.z(iC); } void d( const tComponent &iD ) { mD = iD; } const tComponent &a() const { return mNormal.x(); } const tComponent &b() const { return mNormal.y(); } const tComponent &c() const { return mNormal.z(); } const tComponent &d() const { return mD; } tComponent &a() { return mNormal.x(); } tComponent &b() { return mNormal.y(); } tComponent &c() { return mNormal.z(); } tComponent &d() { return mD; } /**********************************************************************/ void set( const tComponent &iA, const tComponent &iB, const tComponent &iC, const tComponent &iD ) { mNormal.set(iA,iB,iC); mD = iD; } /**********************************************************************/ const tVector pointOn() const { if (fabs(mNormal.x())>0.00001) return tVector( -mD/mNormal.x(), 0, 0 ); else if (fabs(mNormal.y())>0.00001) return tVector( 0, -mD/mNormal.y(), 0 ); else return tVector( 0, 0, -mD/mNormal.z() ); } /**********************************************************************/ const tVector intersect( const tThisPlane &iP2, const tThisPlane &iP3 ) const { cMatrix44<tComponent> m; m.row(0, mNormal.x(),mNormal.y(),mNormal.z(), mD); m.row(1, iP2.mNormal.x(),iP2.mNormal.y(),iP2.mNormal.z(), iP2.mD); m.row(2, iP3.mNormal.x(),iP3.mNormal.y(),iP3.mNormal.z(), iP3.mD); m.row(3, 0,0,0,1); m.invert(); if (m.isZero()) throw cNoResultException( "cPlane3::intersect(plane,plane)", "Two or more planes are parallel" ); return tVector( m[cMatrix44<tComponent>::_03], m[cMatrix44<tComponent>::_13], m[cMatrix44<tComponent>::_23] ); } /**********************************************************************/ const tVector intersect( const tVector &iP1, const tVector &iP2 ) const { const tVector U = iP2 - iP1; const tVector W = iP1 - pointOn(); const tFloat D = mNormal.dot( U ); const tFloat N = -mNormal.dot( W ); if (fabs(D) < 0.000001f) throw cNoResultException( "cPlane3::intersect(line)", "The line is parallel to the plane." ); const tFloat SI = N / D; // if ( SI < 0 || SI > 1 ) // return 0; const tVector Res = iP1 + (U * SI); return Res; } /**********************************************************************/ const tComponent distanceTo( const tVector &iV ) const { return (mNormal.x()*iV.x() + mNormal.y()*iV.y() + mNormal.z()*iV.z() + mD) / mNormal.magnitude(); } /**********************************************************************/ const tComponent pointInFront( const tVector &iV ) const { return (distanceTo(iV)>0); } /**********************************************************************/ const tString dump() const { tString temp("Plane ("); temp += asString(mNormal.x()); temp += mNormal.y()<.0?"x ":"x +"; temp += asString(mNormal.y()); temp += mNormal.z()<.0?"y ":"y +"; temp += asString(mNormal.z()); temp += mD<.0?"z ":"z +"; temp += asString(mD); temp += " = 0)"; return temp; } private: tVector mNormal; tComponent mD; }; // class } // namespace n2l #endif

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