411 lines
13 KiB
C++
411 lines
13 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2005 Robert Osfield
|
|
*
|
|
* This library is open source and may be redistributed and/or modified under
|
|
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
|
|
* (at your option) any later version. The full license is in LICENSE file
|
|
* included with this distribution, and on the openscenegraph.org website.
|
|
*
|
|
* 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
|
|
* OpenSceneGraph Public License for more details.
|
|
*/
|
|
|
|
#include <osgSim/LightPointNode>
|
|
#include <osgSim/LightPointSystem>
|
|
|
|
#include "LightPointDrawable.h"
|
|
|
|
#include <osg/Timer>
|
|
#include <osg/BoundingBox>
|
|
#include <osg/BlendFunc>
|
|
#include <osg/Material>
|
|
|
|
#include <osgUtil/CullVisitor>
|
|
|
|
#include <typeinfo>
|
|
|
|
namespace osgSim
|
|
{
|
|
|
|
osg::StateSet* getSingletonLightPointSystemSet()
|
|
{
|
|
static osg::ref_ptr<osg::StateSet> s_stateset = 0;
|
|
if (!s_stateset)
|
|
{
|
|
s_stateset = new osg::StateSet;
|
|
// force light point nodes to be drawn after everything else by picking a renderin bin number after
|
|
// the transparent bin.
|
|
s_stateset->setRenderBinDetails(20,"DepthSortedBin");
|
|
}
|
|
return s_stateset.get();
|
|
}
|
|
|
|
|
|
LightPointNode::LightPointNode():
|
|
_minPixelSize(0.0f),
|
|
_maxPixelSize(30.0f),
|
|
_maxVisibleDistance2(FLT_MAX),
|
|
_lightSystem(0)
|
|
{
|
|
setStateSet(getSingletonLightPointSystemSet());
|
|
}
|
|
|
|
/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
|
|
LightPointNode::LightPointNode(const LightPointNode& lpn,const osg::CopyOp& copyop):
|
|
osg::Node(lpn,copyop),
|
|
_lightPointList(lpn._lightPointList),
|
|
_minPixelSize(lpn._minPixelSize),
|
|
_maxPixelSize(lpn._maxPixelSize),
|
|
_maxVisibleDistance2(lpn._maxVisibleDistance2),
|
|
_lightSystem(lpn._lightSystem)
|
|
{
|
|
}
|
|
|
|
unsigned int LightPointNode::addLightPoint(const LightPoint& lp)
|
|
{
|
|
unsigned int num = _lightPointList.size();
|
|
_lightPointList.push_back(lp);
|
|
dirtyBound();
|
|
return num;
|
|
}
|
|
|
|
void LightPointNode::removeLightPoint(unsigned int pos)
|
|
{
|
|
if (pos<_lightPointList.size())
|
|
{
|
|
_lightPointList.erase(_lightPointList.begin()+pos);
|
|
dirtyBound();
|
|
}
|
|
dirtyBound();
|
|
}
|
|
|
|
osg::BoundingSphere LightPointNode::computeBound() const
|
|
{
|
|
osg::BoundingSphere bsphere;
|
|
bsphere.init();
|
|
_bbox.init();
|
|
|
|
if (_lightPointList.empty())
|
|
{
|
|
return bsphere;
|
|
}
|
|
|
|
|
|
LightPointList::const_iterator itr;
|
|
for(itr=_lightPointList.begin();
|
|
itr!=_lightPointList.end();
|
|
++itr)
|
|
{
|
|
_bbox.expandBy(itr->_position);
|
|
}
|
|
|
|
|
|
bsphere.set(_bbox.center(),0.0f);
|
|
|
|
for(itr=_lightPointList.begin();
|
|
itr!=_lightPointList.end();
|
|
++itr)
|
|
{
|
|
osg::Vec3 dv(itr->_position-bsphere.center());
|
|
float radius = dv.length()+itr->_radius;
|
|
if (bsphere.radius()<radius) bsphere.radius()=radius;
|
|
}
|
|
|
|
bsphere.radius()+=1.0f;
|
|
return bsphere;
|
|
}
|
|
|
|
|
|
void LightPointNode::traverse(osg::NodeVisitor& nv)
|
|
{
|
|
if (_lightPointList.empty())
|
|
{
|
|
// no light points so no op.
|
|
return;
|
|
}
|
|
|
|
//#define USE_TIMER
|
|
#ifdef USE_TIMER
|
|
osg::Timer timer;
|
|
osg::Timer_t t1=0,t2=0,t3=0,t4=0,t5=0,t6=0,t7=0,t8=0;
|
|
#endif
|
|
|
|
|
|
#ifdef USE_TIMER
|
|
t1 = timer.tick();
|
|
#endif
|
|
|
|
osgUtil::CullVisitor* cv = NULL;
|
|
if (typeid(nv)==typeid(osgUtil::CullVisitor))
|
|
{
|
|
cv = static_cast<osgUtil::CullVisitor*>(&nv);
|
|
}
|
|
|
|
#ifdef USE_TIMER
|
|
t2 = timer.tick();
|
|
#endif
|
|
|
|
|
|
// should we disabled small feature culling here?
|
|
if (cv /*&& !cv->isCulled(_bbox)*/)
|
|
{
|
|
|
|
osg::Matrix matrix = cv->getModelViewMatrix();
|
|
osg::RefMatrix& projection = cv->getProjectionMatrix();
|
|
osgUtil::StateGraph* rg = cv->getCurrentStateGraph();
|
|
|
|
if (rg->leaves_empty())
|
|
{
|
|
// this is first leaf to be added to StateGraph
|
|
// and therefore should not already know to current render bin,
|
|
// so need to add it.
|
|
cv->getCurrentRenderBin()->addStateGraph(rg);
|
|
}
|
|
|
|
#ifdef USE_TIMER
|
|
t3 = timer.tick();
|
|
#endif
|
|
|
|
|
|
LightPointDrawable* drawable = NULL;
|
|
osg::Referenced* object = rg->getUserData();
|
|
if (object)
|
|
{
|
|
if (typeid(*object)==typeid(LightPointDrawable))
|
|
{
|
|
// resuse the user data attached to the render graph.
|
|
drawable = static_cast<LightPointDrawable*>(object);
|
|
|
|
}
|
|
else
|
|
{
|
|
// will need to replace UserData.
|
|
osg::notify(osg::WARN) << "Warning: Replacing osgUtil::StateGraph::_userData to support osgSim::LightPointNode, may have undefined results."<<std::endl;
|
|
}
|
|
}
|
|
|
|
if (!drawable)
|
|
{
|
|
// set it for the frst time.
|
|
drawable = new LightPointDrawable;
|
|
rg->setUserData(drawable);
|
|
|
|
if (cv->getFrameStamp())
|
|
{
|
|
drawable->setReferenceTime(cv->getFrameStamp()->getReferenceTime());
|
|
}
|
|
}
|
|
|
|
// search for a drawable in the RenderLead list equal to the attached the one attached to StateGraph user data
|
|
// as this will be our special light point drawable.
|
|
osgUtil::StateGraph::LeafList::iterator litr;
|
|
for(litr = rg->_leaves.begin();
|
|
litr != rg->_leaves.end() && (*litr)->_drawable!=drawable;
|
|
++litr)
|
|
{}
|
|
|
|
if (litr == rg->_leaves.end())
|
|
{
|
|
// havn't found the drawable added in the RenderLeaf list, there this my be the
|
|
// first time through LightPointNode in this frame, so need to add drawable into the StateGraph RenderLeaf list
|
|
// and update its time signatures.
|
|
|
|
drawable->reset();
|
|
rg->addLeaf(new osgUtil::RenderLeaf(drawable,&projection,NULL,FLT_MAX));
|
|
|
|
// need to update the drawable's frame count.
|
|
if (cv->getFrameStamp())
|
|
{
|
|
drawable->updateReferenceTime(cv->getFrameStamp()->getReferenceTime());
|
|
}
|
|
|
|
}
|
|
|
|
#ifdef USE_TIMER
|
|
t4 = timer.tick();
|
|
#endif
|
|
|
|
|
|
#ifdef USE_TIMER
|
|
t7 = timer.tick();
|
|
#endif
|
|
|
|
|
|
if (cv->getComputeNearFarMode() != osgUtil::CullVisitor::DO_NOT_COMPUTE_NEAR_FAR)
|
|
cv->updateCalculatedNearFar(matrix,_bbox);
|
|
|
|
|
|
const float minimumIntensity = 1.0f/256.0f;
|
|
const osg::Vec3 eyePoint = cv->getEyeLocal();
|
|
|
|
double time=drawable->getReferenceTime();
|
|
double timeInterval=drawable->getReferenceTimeInterval();
|
|
|
|
const osg::Polytope clipvol(cv->getCurrentCullingSet().getFrustum());
|
|
const bool computeClipping = false;//(clipvol.getCurrentMask()!=0);
|
|
|
|
//LightPointDrawable::ColorPosition cp;
|
|
for(LightPointList::iterator itr=_lightPointList.begin();
|
|
itr!=_lightPointList.end();
|
|
++itr)
|
|
{
|
|
const LightPoint& lp = *itr;
|
|
|
|
if (!lp._on) continue;
|
|
|
|
const osg::Vec3& position = lp._position;
|
|
|
|
// skip light point if it is not contianed in the view frustum.
|
|
if (computeClipping && !clipvol.contains(position)) continue;
|
|
|
|
// delta vector between eyepoint and light point.
|
|
osg::Vec3 dv(eyePoint-position);
|
|
|
|
float intensity = (_lightSystem.valid()) ? _lightSystem->getIntensity() : lp._intensity;
|
|
|
|
// slip light point if it is intensity is 0.0 or negative.
|
|
if (intensity<=minimumIntensity) continue;
|
|
|
|
// (SIB) Clip on distance, if close to limit, add transparancy
|
|
float distanceFactor = 1.0f;
|
|
if (_maxVisibleDistance2!=FLT_MAX)
|
|
{
|
|
if (dv.length2()>_maxVisibleDistance2) continue;
|
|
else if (_maxVisibleDistance2 > 0)
|
|
distanceFactor = 1.0f - osg::square(dv.length2() / _maxVisibleDistance2);
|
|
}
|
|
|
|
osg::Vec4 color = lp._color;
|
|
|
|
// check the sector.
|
|
if (lp._sector.valid())
|
|
{
|
|
intensity *= (*lp._sector)(dv);
|
|
|
|
// slip light point if it is intensity is 0.0 or negative.
|
|
if (intensity<=minimumIntensity) continue;
|
|
|
|
}
|
|
|
|
// temporary accounting of intensity.
|
|
//color *= intensity;
|
|
|
|
// check the blink sequence.
|
|
bool doBlink = lp._blinkSequence.valid();
|
|
if (doBlink && _lightSystem.valid())
|
|
doBlink = (_lightSystem->getAnimationState() == LightPointSystem::ANIMATION_ON);
|
|
|
|
if (doBlink)
|
|
{
|
|
osg::Vec4 bs = lp._blinkSequence->color(time,timeInterval);
|
|
color[0] *= bs[0];
|
|
color[1] *= bs[1];
|
|
color[2] *= bs[2];
|
|
color[3] *= bs[3];
|
|
}
|
|
|
|
// if alpha value is less than the min intentsive then skip
|
|
if (color[3]<=minimumIntensity) continue;
|
|
|
|
float pixelSize = cv->pixelSize(position,lp._radius);
|
|
|
|
// cout << "pixelsize = "<<pixelSize<<endl;
|
|
|
|
// adjust pixel size to account for intensity.
|
|
if (intensity!=1.0) pixelSize *= sqrt(intensity);
|
|
|
|
// adjust alfa to account for max range (Fade on distance)
|
|
color[3] *= distanceFactor;
|
|
|
|
// round up to the minimum pixel size if required.
|
|
float orgPixelSize = pixelSize;
|
|
if (pixelSize<_minPixelSize) pixelSize = _minPixelSize;
|
|
|
|
osg::Vec3 xpos(position*matrix);
|
|
|
|
if (lp._blendingMode==LightPoint::BLENDED)
|
|
{
|
|
if (pixelSize<1.0f)
|
|
{
|
|
// need to use alpha blending...
|
|
color[3] *= pixelSize;
|
|
// color[3] *= osg::square(pixelSize);
|
|
|
|
if (color[3]<=minimumIntensity) continue;
|
|
|
|
drawable->addBlendedLightPoint(0, xpos,color);
|
|
}
|
|
else if (pixelSize<_maxPixelSize)
|
|
{
|
|
|
|
unsigned int lowerBoundPixelSize = (unsigned int)pixelSize;
|
|
float remainder = osg::square(pixelSize-(float)lowerBoundPixelSize);
|
|
|
|
// (SIB) Add transparency if pixel is clamped to minpixelsize
|
|
if (orgPixelSize<_minPixelSize)
|
|
color[3] *= (2.0/3.0) + (1.0/3.0) * sqrt(orgPixelSize / pixelSize);
|
|
|
|
drawable->addBlendedLightPoint(lowerBoundPixelSize-1, xpos,color);
|
|
color[3] *= remainder;
|
|
drawable->addBlendedLightPoint(lowerBoundPixelSize, xpos,color);
|
|
}
|
|
else // use a billboard geometry.
|
|
{
|
|
drawable->addBlendedLightPoint((unsigned int)(_maxPixelSize-1.0), xpos,color);
|
|
}
|
|
}
|
|
else // ADDITIVE blending.
|
|
{
|
|
if (pixelSize<1.0f)
|
|
{
|
|
// need to use alpha blending...
|
|
color[3] *= pixelSize;
|
|
// color[3] *= osg::square(pixelSize);
|
|
|
|
if (color[3]<=minimumIntensity) continue;
|
|
|
|
drawable->addAdditiveLightPoint(0, xpos,color);
|
|
}
|
|
else if (pixelSize<_maxPixelSize)
|
|
{
|
|
|
|
unsigned int lowerBoundPixelSize = (unsigned int)pixelSize;
|
|
float remainder = osg::square(pixelSize-(float)lowerBoundPixelSize);
|
|
|
|
// (SIB) Add transparency if pixel is clamped to minpixelsize
|
|
if (orgPixelSize<_minPixelSize)
|
|
color[3] *= (2.0/3.0) + (1.0/3.0) * sqrt(orgPixelSize / pixelSize);
|
|
|
|
float alpha = color[3];
|
|
color[3] = alpha*(1.0f-remainder);
|
|
drawable->addAdditiveLightPoint(lowerBoundPixelSize-1, xpos,color);
|
|
color[3] = alpha*remainder;
|
|
drawable->addAdditiveLightPoint(lowerBoundPixelSize, xpos,color);
|
|
}
|
|
else // use a billboard geometry.
|
|
{
|
|
drawable->addAdditiveLightPoint((unsigned int)(_maxPixelSize-1.0), xpos,color);
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef USE_TIMER
|
|
t8 = timer.tick();
|
|
#endif
|
|
|
|
}
|
|
#ifdef USE_TIMER
|
|
cout << "compute"<<endl;
|
|
cout << " t2-t1="<<t2-t1<<endl;
|
|
cout << " t4-t3="<<t4-t3<<endl;
|
|
cout << " t6-t5="<<t6-t5<<endl;
|
|
cout << " t8-t7="<<t8-t7<<endl;
|
|
cout << "_lightPointList.size()="<<_lightPointList.size()<<endl;
|
|
cout << " t8-t7/size = "<<(float)(t8-t7)/(float)_lightPointList.size()<<endl;
|
|
#endif
|
|
}
|
|
|
|
|
|
} // end of namespace
|