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Wednesday the 23rd of May 2012 @ 06:28pm

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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 cTriangle3.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_cTriangle3_h #define _n2l4_cTriangle3_h #include "n2l/n2l.h" #include "cVector3.h" #include "cMatrix44.h" #include <math.h> /******************************************************************************/ namespace n2l { template <class TComponent> class cTriangle3 { public: typedef TComponent tComponent; typedef cTriangle3<TComponent> tThisTriangle; typedef cVector3<TComponent,TComponent,TComponent> tVertex; typedef cMatrix44<TComponent> tThisMatrix44; /**********************************************************************/ cTriangle3() {} /**********************************************************************/ cTriangle3( const tVertex &iA, const tVertex &iB, const tVertex &iC ) { mVertex[0] = iA; mVertex[1] = iB; mVertex[2] = iC; } /**********************************************************************/ cTriangle3( const tThisTriangle &iTri ) { mVertex[0] = iTri.mVertex[0]; mVertex[1] = iTri.mVertex[1]; mVertex[2] = iTri.mVertex[2]; } /**********************************************************************/ ~cTriangle3() {} /**********************************************************************/ const tVertex &vertex( const tUint &iIndex ) const { return mVertex[iIndex]; } /**********************************************************************/ const tVertex &a() const { return mVertex[0]; } const tVertex &b() const { return mVertex[1]; } const tVertex &c() const { return mVertex[2]; } /**********************************************************************/ tVertex &a() { return mVertex[0]; } tVertex &b() { return mVertex[1]; } tVertex &c() { return mVertex[2]; } /**********************************************************************/ void move( const tVertex &iV ) { mVertex[0] += iV; mVertex[1] += iV; mVertex[2] += iV; } /**********************************************************************/ void rotate( const tThisMatrix44 &iM ) { tVertex tmp; mVertex[0] = iM.multiply( tmp, mVertex[0] ); mVertex[1] = iM.multiply( tmp, mVertex[1] ); mVertex[2] = iM.multiply( tmp, mVertex[2] ); } /**********************************************************************/ void translate( const tThisMatrix44 &iM ) { tVertex tmp; const tVertex Translation( iM[tThisMatrix44::_03], iM[tThisMatrix44::_13], iM[tThisMatrix44::_23] ); mVertex[0] = iM.multiply( tmp, mVertex[0] ); mVertex[1] = iM.multiply( tmp, mVertex[1] ); mVertex[2] = iM.multiply( tmp, mVertex[2] ); mVertex[0] += Translation; mVertex[1] += Translation; mVertex[2] += Translation; } /**********************************************************************/ void set( const tVertex &iA, const tVertex &iB, const tVertex &iC ) { mVertex[0] = iA; mVertex[1] = iB; mVertex[2] = iC; } /**********************************************************************/ const tComponent area() const { tVertex ab = mVertex[1]-mVertex[0]; tVertex ac = mVertex[2]-mVertex[0]; return ab.cross(ac).magnitude()/2; } /**********************************************************************/ const tVertex center() const { tVertex tmp = mVertex[0]; tmp += mVertex[1]; tmp += mVertex[2]; tmp /= 3; return tmp; } /**********************************************************************/ void subdivide( tThisTriangle &oT1, tThisTriangle &oT2 ) const { tVertex ab = mVertex[1]-mVertex[0]; ab /= 2; ab += mVertex[0]; oT1.set( mVertex[0], ab, mVertex[2] ); oT2.set( ab, mVertex[1], mVertex[2] ); } /**********************************************************************/ void subdivideLongest( tThisTriangle &oT1, tThisTriangle &oT2 ) const { tVertex ab = mVertex[1]-mVertex[0]; tVertex bc = mVertex[2]-mVertex[1]; tVertex ca = mVertex[0]-mVertex[2]; const tFloat Mag0 = ab.magnitude(); const tFloat Mag1 = bc.magnitude(); const tFloat Mag2 = ca.magnitude(); tUint a,b,c; if (Mag0>Mag1 && Mag0>Mag2) { a = 0; b = 1; c = 2; } else if (Mag1>Mag0 && Mag1>Mag2) { a = 1; b = 2; c = 0; } else { a = 2; b = 0; c = 1; } ab = mVertex[b]-mVertex[a]; ab /= 2; ab += mVertex[a]; oT1.set( mVertex[a], ab, mVertex[c] ); oT2.set( ab, mVertex[b], mVertex[c] ); } /**********************************************************************/ inline tThisTriangle &operator ==( const tThisTriangle &iTri ) { mVertex[0] = iTri.mVertex[0]; mVertex[1] = iTri.mVertex[1]; mVertex[2] = iTri.mVertex[2]; return *this; } /**********************************************************************/ inline void operator +=( const tVertex &iV ) { move(iV); } /**********************************************************************/ const tString dump() const { tString str("tTriangle3(\n\t"); str += mVertex[0].dump(); str += "\n\t"; str += mVertex[1].dump(); str += "\n\t"; str += mVertex[2].dump(); str += "\n)"; return str; } private: tVertex mVertex[3]; }; // class } // namespace n2l #endif

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