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Wednesday the 23rd of May 2012 @ 04:48pm

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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 cParticleSystem.cpp Go to the documentation of this file. /************************************************************************ Nova-2 Library (libN2L, or simply n2l) Game development C++ Library Copyright (C) 2003 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'. ************************************************************************/ #include "particles/cParticleSystem.h" #include "n2l/renderObjects.h" #include "n2l/timing.h" namespace n2l { tUint cParticleSystem::mBMDrawTime( 0 ); tUint cParticleSystem::mBMUpdateTime( 0 ); tUint cParticleSystem::mBMNoCullDrawTime( 0 ); /* ************************************************************ */ cParticleSystem::cParticleSystem() { } /* ************************************************************ */ void cParticleSystem::addEmitter( const cAutoPtr<cEmitterInterface> & i_ioEmitter ) { if (i_ioEmitter->parentSystem()) throw cBadDataUseException( "cParticleSystem::addEmitter", "Emitter already in a particle system" ); i_ioEmitter->parentSystem( this ); mEmitters.push_back(i_ioEmitter); } /* ************************************************************ */ void cParticleSystem::addParticle( const cParticle & iParticle ) { mParticles[iParticle.textureID()].push_back( iParticle ); } /* ************************************************************ */ void cParticleSystem::ownParticle( cParticle *const ioParticle ) { // Fairly obviously, this has to change mParticles[ioParticle->textureID()].push_back( *ioParticle ); delete ioParticle; } /* ************************************************************ */ void cParticleSystem::addForce( const cAutoPtr<cForce> & i_ioForce ) { mForces.push_back(i_ioForce); } /* ************************************************************ */ void cParticleSystem::update( const tUint iTimePassed ) { const tUint STime = n2lGetTicks(); // Update emissions for (tEmitterContainer::iterator it = mEmitters.begin(); it!=mEmitters.end(); ++it) (*it)->update(iTimePassed); // Apply forces & update particles tFloat Seconds( iTimePassed/1000.0f ); for (tTextureGroups::iterator texIt = mParticles.begin(); texIt!=mParticles.end(); ) { tParticleContainer::iterator it = texIt->second.begin(); while (it!=texIt->second.end()) { for (tForceContainer::const_iterator fIT = mForces.begin(); fIT!=mForces.end(); ++fIT) (*fIT)->applyOn( iTimePassed, *it ); it->update(Seconds); if (!it->alive()) it = texIt->second.erase(it); else ++it; } if (texIt->second.empty()) { tTextureGroups::iterator eIt = texIt++; mParticles.erase( eIt ); } else ++texIt; } mBMUpdateTime += n2lGetTicks()-STime; } /* ************************************************************ */ void cParticleSystem::draw( const cRFrustum &iFrustum ) const { const tUint STime = n2lGetTicks(); tFloat matrix[16]; glGetFloatv( GL_MODELVIEW_MATRIX, matrix ); tVector3f upVector( matrix[1],matrix[5],matrix[9] ); tVector3f rightVector( matrix[0],matrix[4],matrix[8] ); upVector *= 0.5f; rightVector *= 0.5f; // Set up the display as we know we'll need it. glPushAttrib( GL_ALL_ATTRIB_BITS ); glEnable( GL_TEXTURE_2D ); glEnable( GL_DEPTH_TEST ); glDepthMask( GL_FALSE ); glDepthFunc( GL_LESS ); glEnable( GL_BLEND ); glShadeModel(GL_SMOOTH); glCullFace(GL_BACK); glEnable(GL_CULL_FACE); glBlendFunc(GL_SRC_ALPHA,GL_ONE); glDisable( GL_LIGHTING ); for (tTextureGroups::const_iterator texIt = mParticles.begin(); texIt!=mParticles.end(); ++texIt) { texIt->second.front().texture()->bind(); for (tParticleContainer::const_iterator it = texIt->second.begin(); it!=texIt->second.end(); ++it) { if (iFrustum.testSphere(it->pos(),it->boundRadius())) it->draw( upVector, rightVector ); } } glPopAttrib(); mBMDrawTime += n2lGetTicks()-STime; } /* ************************************************************ */ void cParticleSystem::draw() const { const tUint STime = n2lGetTicks(); tFloat matrix[16]; glGetFloatv( GL_MODELVIEW_MATRIX, matrix ); tVector3f upVector( matrix[1],matrix[5],matrix[9] ); tVector3f rightVector( matrix[0],matrix[4],matrix[8] ); upVector *= 0.5f; rightVector *= 0.5f; // Set up the display as we know we'll need it. glPushAttrib( GL_ALL_ATTRIB_BITS ); glEnable( GL_TEXTURE_2D ); glEnable( GL_DEPTH_TEST ); glDepthMask( GL_FALSE ); glDepthFunc( GL_LESS ); glEnable( GL_BLEND ); glShadeModel(GL_SMOOTH); glCullFace(GL_BACK); glEnable(GL_CULL_FACE); glBlendFunc(GL_SRC_ALPHA,GL_ONE); glDisable( GL_LIGHTING ); for (tTextureGroups::const_iterator texIt = mParticles.begin(); texIt!=mParticles.end(); ++texIt) { for (tParticleContainer::const_iterator it = texIt->second.begin(); it!=texIt->second.end(); ++it) { it->draw( upVector, rightVector ); } } glPopAttrib(); mBMNoCullDrawTime += n2lGetTicks()-STime; } /* ************************************************************ */ void cParticleSystem::clear() { mParticles.clear(); } } // namespace

©2012 Aaron Cameron