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Documentation                       Search   point_light_model.cpp Go to the documentation of this file. /* Copyright, 2001 Nevrax Ltd. * * This file is part of NEVRAX NEL. * NEVRAX NEL is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * NEVRAX NEL 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 * General Public License for more details. * You should have received a copy of the GNU General Public License * along with NEVRAX NEL; see the file COPYING. If not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, * MA 02111-1307, USA. */ #include "std3d.h" #include "3d/point_light_model.h" #include "3d/light_trav.h" #include "3d/root_model.h" #include "3d/skeleton_model.h" namespace NL3D { // *************************************************************************** void CPointLightModel::registerBasic() { CMOT::registerModel( PointLightModelId, TransformId, CPointLightModel::creator); CMOT::registerObs( LightTravId, PointLightModelId, CPointLightModelLightObs::creator ); } // *************************************************************************** CPointLightModel::CPointLightModel() { _DeltaPosToSkeletonWhenOutOfFrustum.set(0, 0, 1.5f); _TimeFromLastClippedSpotDirection= 0; } // *************************************************************************** CPointLightModel::~CPointLightModel() { } // *************************************************************************** void CPointLightModel::initModel() { CTransform::initModel(); // link to the LightModelRoot in the lightTrav. IObs *obs= getObs(LightTravId); CLightTrav *lightTrav= (CLightTrav*)obs->Trav; nlassert( lightTrav->LightModelRoot ); // link me to the root of light. lightTrav->link(lightTrav->LightModelRoot, this); } // *************************************************************************** void CPointLightModel::setDeltaPosToSkeletonWhenOutOfFrustum(const CVector &deltaPos) { _DeltaPosToSkeletonWhenOutOfFrustum= deltaPos; } // *************************************************************************** const CVector &CPointLightModel::getDeltaPosToSkeletonWhenOutOfFrustum() const { return _DeltaPosToSkeletonWhenOutOfFrustum; } // *************************************************************************** void CPointLightModelLightObs::traverse(IObs *caller) { CPointLightModel *plModel= (CPointLightModel*)Model; CLightTrav *lightTrav= (CLightTrav*)Trav; // Note: any dynamic light is supposed to always move each frame, so they are re-inserted in the // quadGrid each frame. // reset all models lighted by this light. // Then models are marked dirty and their light setup is reseted plModel->PointLight.resetLightedModels(); // if the light is visible (ie not hiden) if( plModel->isHrcVisible() ) { // If the light is not hidden by any skeleton. if( plModel->isClipVisible() ) { // recompute the worldPosition of the light. plModel->PointLight.setPosition( plModel->getWorldMatrix().getPos() ); // recompute the worldSpotDirection of the light. if(plModel->PointLight.getType() == CPointLight::SpotLight) { // Interpolate over time. (hardcoded) plModel->_TimeFromLastClippedSpotDirection-= 0.05f; if(plModel->_TimeFromLastClippedSpotDirection <= 0) { plModel->PointLight.setupSpotDirection(plModel->getWorldMatrix().getJ()); } else { CVector actualSpotDir= plModel->getWorldMatrix().getJ(); // Interpolate float t= plModel->_TimeFromLastClippedSpotDirection; CVector interpSpotDir= actualSpotDir*(1-t) + plModel->_LastWorldSpotDirectionWhenOutOfFrustum * t; // set the interpolated one. plModel->PointLight.setupSpotDirection(interpSpotDir); } } } else { // We are hidden because a skeleton has hide us (or else don't know why). nlassert(plModel->getHrcObs()->_AncestorSkeletonModel); const CMatrix &skMatrix= plModel->getHrcObs()->_AncestorSkeletonModel->getWorldMatrix(); plModel->PointLight.setPosition( skMatrix * plModel->_DeltaPosToSkeletonWhenOutOfFrustum ); // recompute the worldSpotDirection of the light. if(plModel->PointLight.getType() == CPointLight::SpotLight) { // If last frame, this pointLight was visible (Time is not 1) if(plModel->_TimeFromLastClippedSpotDirection != 1) { // Take the current World spot direction plModel->_LastWorldSpotDirectionWhenOutOfFrustum= plModel->PointLight.getSpotDirection(); // reset time. plModel->_TimeFromLastClippedSpotDirection= 1; } // Don't need to modify PointLight spot direction since already setuped (when model was visible) } } // now, insert this light in the quadGrid. NB: in CLightTrav::traverse(), the quadGrid is cleared before here. // This light will touch (resetLighting()) any model it may influence. lightTrav->LightingManager.addDynamicLight(&plModel->PointLight); } } } // NL3D