bool CullVisitor::updateCalculatedNearFar(const osg::Matrix& matrix,const osg::BoundingBox& bb)
{
// efficient computation of near and far, only taking into account the nearest and furthest
// corners of the bounding box.
value_type d_near = distance(bb.corner(_bbCornerNear),matrix);
value_type d_far = distance(bb.corner(_bbCornerFar),matrix);
if (d_near>d_far)
{
std::swap(d_near,d_far);
if ( !EQUAL_F(d_near, d_far) )
{
OSG_WARN<<"Warning: CullVisitor::updateCalculatedNearFar(.) near>far in range calculation,"<< std::endl;
OSG_WARN<<" correcting by swapping values d_near="<<d_near<<" dfar="<<d_far<< std::endl;
}
}
if (d_far<0.0)
{
// whole object behind the eye point so disguard
return false;
}
if (d_near<_computed_znear) _computed_znear = d_near;
if (d_far>_computed_zfar) _computed_zfar = d_far;
return true;
}
void TXPArchive::getExtents(osg::BoundingBox& extents)
{
TileInfo sw, ne;
trpg2iPoint tileExtents;
this->GetHeader()->GetLodSize(0, tileExtents);
this->getTileInfo(0, 0, 0, sw);
this->getTileInfo(tileExtents.x-1, tileExtents.y-1, 0, ne);
extents.set(sw.bbox._min, sw.bbox._max);
extents.expandBy(ne.bbox);
}
osg::BoundingSphere
TileNode::computeBound() const
{
osg::BoundingSphere bs;
if (_surface.valid())
{
bs = _surface->getBound();
const osg::BoundingBox bbox = _surface->getAlignedBoundingBox();
_tileKeyValue.a() = std::max( (bbox.xMax()-bbox.xMin()), (bbox.yMax()-bbox.yMin()) );
}
return bs;
}
double LispSM::calcNoptGeneral(const osg::Matrix lightSpace, const osg::BoundingBox &B_ls) const
{
const osg::Matrix &eyeView = getViewMatrix();
const osg::Matrix invLightSpace = osg::Matrix::inverse(lightSpace);
const osg::Vec3d z0_ls = getZ0_ls(lightSpace, _E, B_ls.zMax(), getEyeDir());
const osg::Vec3d z1_ls = osg::Vec3d(z0_ls.x(), z0_ls.y(), B_ls.zMin());
// to world
const osg::Vec4d z0_ws = osg::Vec4d(z0_ls, 1) * invLightSpace;
const osg::Vec4d z1_ws = osg::Vec4d(z1_ls, 1) * invLightSpace;
// to eye
const osg::Vec4d z0_cs = z0_ws * eyeView;
const osg::Vec4d z1_cs = z1_ws * eyeView;
double z0 = -z0_cs.z() / z0_cs.w();
double z1 = -z1_cs.z() / z1_cs.w();
if (z1 / z0 <= 1.0)
{
// solve camera pos singularity in light space problem brutally:
// if extreme points of B projected to Light space extend beyond
// camera frustum simply use B extents in camera frustum
// Its not optimal selection but ceratainly better than negative N
osg::BoundingBox bb = _hull.computeBoundingBox(eyeView);
z0 = -bb.zMax();
if (z0 <= 0)
z0 = 0.1;
z1 = -bb.zMin();
if (z1 <= z0)
z1 = z0 + 0.1;
}
const double d = osg::absolute(B_ls.zMax() - B_ls.zMin());
double N = d / (sqrt(z1 / z0) - 1.0);
#if PRINT_COMPUTED_N_OPT
std::cout
<< " N=" << std::setw(8) << N
<< " n=" << std::setw(8) << z0
<< " f=" << std::setw(8) << z1
<< "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"
<< std::flush;
#endif
return N;
}
void ComputeAABBOnBoneVisitor::serializeBoundingBox(const osg::BoundingBox &bb,
const osg::Matrix &transform,
osgAnimation::Bone &b,
float ratio) {
osg::Vec3 center = bb.center();
double halfLenghtX = (bb._max.x() - bb._min.x()) * 0.50;
double halfLenghtY = (bb._max.y() - bb._min.y()) * 0.50;
double halfLenghtZ = (bb._max.z() - bb._min.z()) * 0.50;
halfLenghtX *= ratio;
halfLenghtY *= ratio;
halfLenghtZ *= ratio;
osg::BoundingBox serializedBB;
serializedBB.expandBy(osg::Vec3(center.x() - halfLenghtX, center.y() + halfLenghtY, center.z() + halfLenghtZ) * transform);
serializedBB.expandBy(osg::Vec3(center.x() - halfLenghtX, center.y() + halfLenghtY, center.z() - halfLenghtZ) * transform);
serializedBB.expandBy(osg::Vec3(center.x() - halfLenghtX, center.y() - halfLenghtY, center.z() - halfLenghtZ) * transform);
serializedBB.expandBy(osg::Vec3(center.x() - halfLenghtX, center.y() - halfLenghtY, center.z() + halfLenghtZ) * transform);
serializedBB.expandBy(osg::Vec3(center.x() + halfLenghtX, center.y() + halfLenghtY, center.z() + halfLenghtZ) * transform);
serializedBB.expandBy(osg::Vec3(center.x() + halfLenghtX, center.y() + halfLenghtY, center.z() - halfLenghtZ) * transform);
serializedBB.expandBy(osg::Vec3(center.x() + halfLenghtX, center.y() - halfLenghtY, center.z() - halfLenghtZ) * transform);
serializedBB.expandBy(osg::Vec3(center.x() + halfLenghtX, center.y() - halfLenghtY, center.z() + halfLenghtZ) * transform);
b.setUserValue("AABBonBone_min", serializedBB._min);
b.setUserValue("AABBonBone_max", serializedBB._max);
}
void ComputeBoundsVisitor::applyBoundingBox(const osg::BoundingBox& bbox)
{
if (_matrixStack.empty()) _bb.expandBy(bbox);
else if (bbox.valid())
{
const osg::Matrix& matrix = _matrixStack.back();
_bb.expandBy(bbox.corner(0) * matrix);
_bb.expandBy(bbox.corner(1) * matrix);
_bb.expandBy(bbox.corner(2) * matrix);
_bb.expandBy(bbox.corner(3) * matrix);
_bb.expandBy(bbox.corner(4) * matrix);
_bb.expandBy(bbox.corner(5) * matrix);
_bb.expandBy(bbox.corner(6) * matrix);
_bb.expandBy(bbox.corner(7) * matrix);
}
}
osg::Vec3 Curve::mapTo( const osg::Vec3 p, osg::BoundingBox originRect, osg::BoundingBox newRect )
{
osg::Vec3 newPos = p-originRect.center();
osg::Vec3 originSpace = originRect._max-originRect._min;
osg::Vec3 scaleFactor = (newRect._max-newRect._min);
if ( originSpace.x() ) scaleFactor.x() /= originSpace.x();
else scaleFactor.x() = 0.0;
if ( originSpace.y() ) scaleFactor.y() /= originSpace.y();
else scaleFactor.y() = 0.0;
if ( originSpace.z() ) scaleFactor.z() /= originSpace.z();
else scaleFactor.z() = 0.0;
newPos = osg::Vec3(newPos.x()*scaleFactor.x(), newPos.y()*scaleFactor.y(), newPos.z()*scaleFactor.z());
return newPos+newRect.center();
}
void Style::setupClipStateSet(const osg::BoundingBox& extents, osg::StateSet* stateset)
{
unsigned int clipTextureUnit = 1;
stateset->setAttributeAndModes( new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.0f), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
stateset->setTextureAttributeAndModes( clipTextureUnit, _clipTexture.get(), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
osg::Matrixd matrix = osg::Matrixd::translate(osg::Vec3(-extents.xMin(), -extents.yMin(), -extents.zMin()))*
osg::Matrixd::scale(osg::Vec3(1.0f/(extents.xMax()-extents.xMin()), 1.0f/(extents.yMax()-extents.yMin()), 1.0f));
osg::ref_ptr<osg::TexGen> texgen = new osg::TexGen;
texgen->setPlanesFromMatrix(matrix);
texgen->setMode(osg::TexGen::OBJECT_LINEAR);
stateset->setTextureAttributeAndModes( clipTextureUnit, texgen.get(), osg::StateAttribute::ON);
}
BboxDrawable::BboxDrawable( const osg::BoundingBox& box, const BBoxSymbol &bboxSymbol ) :
osg::Geometry()
{
setUseVertexBufferObjects(true);
float margin = bboxSymbol.margin().isSet() ? bboxSymbol.margin().value() : 2.f;
osg::Vec3Array* v = new osg::Vec3Array();
if ( bboxSymbol.geom().isSet() && bboxSymbol.geom().value() == BBoxSymbol::GEOM_BOX_ORIENTED )
{
float h = box.yMax() - box.yMin() + 2.f * margin;
v->push_back( osg::Vec3(box.xMax()+margin+h/2.f, box.yMax()+margin-h/2.f, 0) );
}
v->push_back( osg::Vec3(box.xMax()+margin, box.yMax()+margin, 0) );
v->push_back( osg::Vec3(box.xMin()-margin, box.yMax()+margin, 0) );
v->push_back( osg::Vec3(box.xMin()-margin, box.yMin()-margin, 0) );
v->push_back( osg::Vec3(box.xMax()+margin, box.yMin()-margin, 0) );
setVertexArray(v);
if ( v->getVertexBufferObject() )
v->getVertexBufferObject()->setUsage(GL_STATIC_DRAW_ARB);
osg::Vec4Array* c = new osg::Vec4Array();
if ( bboxSymbol.fill().isSet() )
{
c->push_back( bboxSymbol.fill()->color() );
addPrimitiveSet( new osg::DrawArrays(GL_POLYGON, 0, v->getNumElements()) );
}
if ( bboxSymbol.border().isSet() )
{
c->push_back( bboxSymbol.border()->color() );
if ( bboxSymbol.border()->width().isSet() )
getOrCreateStateSet()->setAttribute( new osg::LineWidth( bboxSymbol.border()->width().value() ));
addPrimitiveSet( new osg::DrawArrays(GL_LINE_LOOP, 0, v->getNumElements()) );
}
setColorArray( c );
setColorBinding( osg::Geometry::BIND_PER_PRIMITIVE_SET );
// add the static "isText=true" uniform; this is a hint for the annotation shaders
// if they get installed.
static osg::ref_ptr<osg::Uniform> s_isTextUniform = new osg::Uniform(osg::Uniform::BOOL, AnnotationUtils::UNIFORM_IS_TEXT());
s_isTextUniform->set( false );
getOrCreateStateSet()->addUniform( s_isTextUniform.get() );
// Disable culling since this bounding box will eventually be drawn in screen space.
#if OSG_MIN_VERSION_REQUIRED(3,4,0)
setCullingActive(false);
#endif
}
// this is the algorithm discussed in the article
osg::Matrix LispSM::getLispSmMtx(const osg::Matrix &lightSpace) const
{
const osg::BoundingBox B_ls = _hull.computeBoundingBox(lightSpace);
const double n = getN(lightSpace, B_ls);
// get the coordinates of the near camera point in light space
const osg::Vec3d e_ls = _E * lightSpace;
// c start has the x and y coordinate of e, the z coord of B.min()
const osg::Vec3d Cstart_lp(e_ls.x(), e_ls.y(), B_ls.zMax());
if (n >= OSG_INFINITY)
{
// if n is inf. than we should do uniform shadow mapping
return osg::Matrix::identity();
}
// calc C the projection center
// new projection center C, n behind the near plane of P
// we work along a negative axis so we transform +n*<the positive axis> == -n*<neg axis>
const osg::Vec3d C(Cstart_lp + osg::Vec3d(0, 0, 1) * n);
// construct a translation that moves to the projection center
const osg::Matrix projectionCenter = osg::Matrix::translate(-C);
// calc d the perspective transform depth or light space y extents
const double d = osg::absolute(B_ls.zMax() - B_ls.zMin());
// the lispsm perspective transformation
// here done with a standard frustum call that maps P onto the unit cube with
// corner points [-1,-1,-1] and [1,1,1].
// in directX you can use the same mapping and do a mapping to the directX post-perspective cube
// with corner points [-1,-1,0] and [1,1,1] as the final step after all the shadow mapping.
osg::Matrix P = osg::Matrix::frustum(-1.0, 1.0, -1.0, 1.0, n, n + d);
// invert the transform from right handed into left handed coordinate system for the ndc
// done by the openGL style frustumGL call
// so we stay in a right handed system
P = P * osg::Matrix::scale(1.0, 1.0, -1.0);
// return the lispsm frustum with the projection center
return projectionCenter * P;
}
void
HorizonTileCuller::set(const osg::BoundingBox& bbox)
{
// Adjust the horizon ellipsoid based on the minimum Z value of the tile;
// necessary because a tile that's below the ellipsoid (ocean floor, e.g.)
// may be visible even if it doesn't pass the horizon-cone test. In such
// cases we need a more conservative ellipsoid.
double zMin = bbox.corner(0).z();
if ( zMin < 0.0 )
{
_horizonProto.setEllipsoid( osg::EllipsoidModel(_radiusEquator + zMin, _radiusPolar + zMin) );
}
// consider the uppermost 4 points of the tile-aligned bounding box.
// (the last four corners of the bbox are the "zmax" corners.)
for(unsigned i=0; i<4; ++i)
{
_points[i] = bbox.corner(4+i) * _local2world;
}
}
void ComputeBoundingBoxByRotation(osg::BoundingBox & InOut,osg::Vec3 BBCenter,float BBSize,osg::Matrixd Rotation)
{
osg::BoundingBox bb;
bb.set(BBCenter.x()-BBSize,BBCenter.y()-BBSize,BBCenter.z()-BBSize,BBCenter.x()+BBSize,BBCenter.y()+BBSize,BBCenter.z()+BBSize);
osg::BoundingBox Tbb;
for(unsigned int i=0;i<8;i++)
{
Tbb.expandBy(Rotation.preMult(bb.corner(i)));
}
InOut.set(Tbb.xMin(),Tbb.yMin(),Tbb.zMin(),Tbb.xMax(),Tbb.yMax(),Tbb.zMax());
}
BboxDrawable::BboxDrawable( const osg::BoundingBox& box, const BBoxSymbol &bboxSymbol ) :
osg::Geometry()
{
setUseVertexBufferObjects(true);
float margin = bboxSymbol.margin().isSet() ? bboxSymbol.margin().value() : 2.f;
osg::Vec3Array* v = new osg::Vec3Array();
if ( bboxSymbol.geom().isSet() && bboxSymbol.geom().value() == BBoxSymbol::GEOM_BOX_ORIENTED )
{
float h = box.yMax() - box.yMin() + 2.f * margin;
v->push_back( osg::Vec3(box.xMax()+margin+h/2.f, box.yMax()+margin-h/2.f, 0) );
}
v->push_back( osg::Vec3(box.xMax()+margin, box.yMax()+margin, 0) );
v->push_back( osg::Vec3(box.xMin()-margin, box.yMax()+margin, 0) );
v->push_back( osg::Vec3(box.xMin()-margin, box.yMin()-margin, 0) );
v->push_back( osg::Vec3(box.xMax()+margin, box.yMin()-margin, 0) );
setVertexArray(v);
if ( v->getVertexBufferObject() )
v->getVertexBufferObject()->setUsage(GL_STATIC_DRAW_ARB);
osg::Vec4Array* c = new osg::Vec4Array(osg::Array::BIND_PER_PRIMITIVE_SET);
if ( bboxSymbol.fill().isSet() )
{
c->push_back( bboxSymbol.fill()->color() );
osg::DrawElements* de = new osg::DrawElementsUByte(GL_TRIANGLE_STRIP);
de->addElement(0);
de->addElement(1);
de->addElement(3);
de->addElement(2);
addPrimitiveSet(de);
//addPrimitiveSet( new osg::DrawArrays(GL_POLYGON, 0, v->getNumElements()) );
}
if ( bboxSymbol.border().isSet() )
{
c->push_back( bboxSymbol.border()->color() );
if ( bboxSymbol.border()->width().isSet() )
getOrCreateStateSet()->setAttribute( new osg::LineWidth( bboxSymbol.border()->width().value() ));
addPrimitiveSet( new osg::DrawArrays(GL_LINE_LOOP, 0, v->getNumElements()) );
}
setColorArray( c );
// Disable culling since this bounding box will eventually be drawn in screen space.
setCullingActive(false);
}
void BuildKdTree::computeDivisions(KdTree::BuildOptions& options)
{
osg::Vec3 dimensions(_bb.xMax()-_bb.xMin(),
_bb.yMax()-_bb.yMin(),
_bb.zMax()-_bb.zMin());
#ifdef VERBOSE_OUTPUT
OSG_NOTICE<<"computeDivisions("<<options._maxNumLevels<<") "<<dimensions<< " { "<<std::endl;
#endif
_axisStack.reserve(options._maxNumLevels);
for(unsigned int level=0; level<options._maxNumLevels; ++level)
{
int axis = 0;
if (dimensions[0]>=dimensions[1])
{
if (dimensions[0]>=dimensions[2]) axis = 0;
else axis = 2;
}
else if (dimensions[1]>=dimensions[2]) axis = 1;
else axis = 2;
_axisStack.push_back(axis);
dimensions[axis] /= 2.0f;
#ifdef VERBOSE_OUTPUT
OSG_NOTICE<<" "<<level<<", "<<dimensions<<", "<<axis<<std::endl;
#endif
}
#ifdef VERBOSE_OUTPUT
OSG_NOTICE<<"}"<<std::endl;
#endif
}
void apply(osg::Node &node)
{
osg::Transform *mt;
osg::Geode *geo;
osg::ref_ptr<osg::RefMatrix> M = matStack.back();
if ((geo = dynamic_cast<osg::Geode *>(&node)))
{
unsigned int i;
osg::BoundingBox bb;
for (i = 0; i < geo->getNumDrawables(); i++)
{
bb.expandBy(geo->getDrawable(i)->getBound());
}
if (M.get())
{
bbox.expandBy(osg::Vec3(bb.xMin(), bb.yMin(), bb.zMin()) * *M);
bbox.expandBy(osg::Vec3(bb.xMax(), bb.yMax(), bb.zMax()) * *M);
}
else
{
bbox.expandBy(osg::Vec3(bb.xMin(), bb.yMin(), bb.zMin()));
bbox.expandBy(osg::Vec3(bb.xMax(), bb.yMax(), bb.zMax()));
}
}
if ((mt = dynamic_cast<osg::Transform *>(&node)))
{
osg::ref_ptr<osg::RefMatrix> matrix = new osg::RefMatrix;
mt->computeLocalToWorldMatrix(*matrix, this);
matStack.push_back(matrix);
}
traverse(node);
if ((mt = dynamic_cast<osg::Transform *>(&node)))
{
matStack.pop_back();
}
}
void
HorizonTileCuller::set(const SpatialReference* srs,
const osg::Matrix& local2world,
const osg::BoundingBox& bbox)
{
if (!_horizon.valid() && srs->isGeographic())
{
_horizon = new Horizon();
}
if (_horizon.valid())
{
_horizon->setEllipsoid(*srs->getEllipsoid());
//_radiusPolar = srs->getEllipsoid()->getRadiusPolar();
//_radiusEquator = srs->getEllipsoid()->getRadiusEquator();
//_local2world = local2world;
// Adjust the horizon ellipsoid based on the minimum Z value of the tile;
// necessary because a tile that's below the ellipsoid (ocean floor, e.g.)
// may be visible even if it doesn't pass the horizon-cone test. In such
// cases we need a more conservative ellipsoid.
double zMin = (double)std::min( bbox.corner(0).z(), 0.0f );
zMin = std::max(zMin, -25000.0); // approx the lowest point on earth * 2
_horizon->setEllipsoid( osg::EllipsoidModel(
srs->getEllipsoid()->getRadiusEquator() + zMin,
srs->getEllipsoid()->getRadiusPolar() + zMin) );
// consider the uppermost 4 points of the tile-aligned bounding box.
// (the last four corners of the bbox are the "zmax" corners.)
for(unsigned i=0; i<4; ++i)
{
_points[i] = bbox.corner(4+i) * local2world;
}
//_bs.set(bbox.center() * _local2world, bbox.radius());
}
}
bool DebugShadowMap::ViewData::DebugBoundingBox
( const osg::BoundingBox & bb, const char * name )
{
bool result = false;
#if defined( _DEBUG ) || defined( DEBUG )
if( !name ) name = "";
osg::BoundingBox & bb_prev = _boundingBoxMap[ std::string( name ) ];
result = bb.center() != bb_prev.center() || bb.radius() != bb_prev.radius();
if( result )
std::cout << "Box<" << name << "> ("
<< ( bb._max._v[0] + bb._min._v[0] ) * 0.5 << " "
<< ( bb._max._v[1] + bb._min._v[1] ) * 0.5 << " "
<< ( bb._max._v[2] + bb._min._v[2] ) * 0.5 << ") ["
<< ( bb._max._v[0] - bb._min._v[0] ) << " "
<< ( bb._max._v[1] - bb._min._v[1] ) << " "
<< ( bb._max._v[2] - bb._min._v[2] ) << "] "
<< std::endl;
bb_prev = bb;
#endif
return result;
}
bool GetBoundingBox(osg::BoundingBox & BB, dtCore::DeltaDrawable & drawable)
{
osg::Node* node = drawable.GetOSGNode();
if (node != 0)
{
dtUtil::BoundingBoxVisitor bbv;
node->accept(bbv);
// no copy constructor for osg::BB...
BB.set(bbv.mBoundingBox._min, bbv.mBoundingBox._max);
return true;
}
LOG_WARNING("No valid osg node of drawable when asking for bounding box.");
return false;
}
inline bool CheckAndMultiplyBoxIfWithinPolytope
( osg::BoundingBox & bb, osg::Matrix & m, osg::Polytope &p )
{
if( !bb.valid() ) return false;
osg::Vec3 o = bb._min * m, s[3];
for( int i = 0; i < 3; i ++ )
s[i] = osg::Vec3( m(i,0), m(i,1), m(i,2) ) * ( bb._max[i] - bb._min[i] );
for( osg::Polytope::PlaneList::iterator it = p.getPlaneList().begin();
it != p.getPlaneList().end();
++it )
{
float dist = it->distance( o ), dist_min = dist, dist_max = dist;
for( int i = 0; i < 3; i ++ ) {
dist = it->dotProductNormal( s[i] );
if( dist < 0 ) dist_min += dist; else dist_max += dist;
}
if( dist_max < 0 )
return false;
}
bb._max = bb._min = o;
#if 1
for( int i = 0; i < 3; i ++ )
for( int j = 0; j < 3; j ++ )
if( s[i][j] < 0 ) bb._min[j] += s[i][j]; else bb._max[j] += s[i][j];
#else
b.expandBy( o + s[0] );
b.expandBy( o + s[1] );
b.expandBy( o + s[2] );
b.expandBy( o + s[0] + s[1] );
b.expandBy( o + s[0] + s[2] );
b.expandBy( o + s[1] + s[2] );
b.expandBy( o + s[0] + s[1] + s[2] );
#endif
#if ( IGNORE_OBJECTS_LARGER_THAN_HEIGHT > 0 )
if( bb._max[2] - bb._min[2] > IGNORE_OBJECTS_LARGER_THAN_HEIGHT ) // ignore huge objects
return false;
#endif
return true;
}
void MinimalShadowMap::ViewData::cutScenePolytope
( const osg::Matrix & transform,
const osg::Matrix & inverse,
const osg::BoundingBox & bb )
{
_sceneReceivingShadowPolytopePoints.clear();
if( bb.valid() ) {
osg::Polytope polytope;
polytope.setToBoundingBox( bb );
polytope.transformProvidingInverse( inverse );
_sceneReceivingShadowPolytope.cut( polytope );
_sceneReceivingShadowPolytope.getPoints
( _sceneReceivingShadowPolytopePoints );
} else
_sceneReceivingShadowPolytope.clear();
}
CSulGeomBox::CSulGeomBox( const osg::BoundingBox& bb ) :
CSulGeode()
{
m_minX = bb.xMin();
m_maxX = bb.xMax();
m_minY = bb.yMin();
m_maxY = bb.yMax();
m_minZ = bb.zMin();
m_maxZ = bb.zMax();
createDrawable();
}
bool PickEventHandler::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa, osg::Object*, osg::NodeVisitor* nv)
{
if (ea.getHandled()) return false;
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::MOVE):
case(osgGA::GUIEventAdapter::PUSH):
case(osgGA::GUIEventAdapter::DRAG):
case(osgGA::GUIEventAdapter::RELEASE):
{
if(ea.getEventType() == osgGA::GUIEventAdapter::PUSH)
{
_drawablesOnPush.clear();
}
osgViewer::Viewer* viewer = dynamic_cast<osgViewer::Viewer*>(&aa);
osgUtil::LineSegmentIntersector::Intersections intersections;
if (viewer->computeIntersections(ea, nv->getNodePath(), intersections))
{
for(osgUtil::LineSegmentIntersector::Intersections::iterator hitr=intersections.begin();
hitr!=intersections.end();
++hitr)
{
if (_operation == FORWARD_MOUSE_EVENT)
{
osg::ref_ptr<osgGA::GUIEventAdapter> cloned_ea = osg::clone(&ea);
// clear touch-data as this prevents sending the event as mouse-event
cloned_ea->setTouchData(NULL);
// reproject mouse-coord
const osg::BoundingBox bb(hitr->drawable->getBound());
const osg::Vec3& p(hitr->localIntersectionPoint);
float transformed_x = (p.x() - bb.xMin()) / (bb.xMax() - bb.xMin());
float transformed_y = (p.z() - bb.zMin()) / (bb.zMax() - bb.zMin());
cloned_ea->setX(ea.getXmin() + transformed_x * (ea.getXmax() - ea.getXmin()));
cloned_ea->setY(ea.getYmin() + transformed_y * (ea.getYmax() - ea.getYmin()));
cloned_ea->setMouseYOrientation(osgGA::GUIEventAdapter::Y_INCREASING_UPWARDS);
// std::cout << transformed_x << "/" << transformed_x << " -> " << cloned_ea->getX() << "/" <<cloned_ea->getY() << std::endl;
SlideEventHandler::instance()->forwardEventToDevices(cloned_ea.get());
}
else if ((_operation == FORWARD_TOUCH_EVENT) && ea.isMultiTouchEvent())
{
osg::ref_ptr<osgGA::GUIEventAdapter> cloned_ea = osg::clone(&ea);
cloned_ea->setMouseYOrientation(osgGA::GUIEventAdapter::Y_INCREASING_DOWNWARDS);
osgGA::GUIEventAdapter::TouchData* touch_data = cloned_ea->getTouchData();
// reproject touch-points
const osg::BoundingBox bb(hitr->drawable->getBound());
osg::Camera* camera = viewer->getCamera();
osg::Matrix matrix = osg::computeLocalToWorld(hitr->nodePath, false) * camera->getViewMatrix() * camera->getProjectionMatrix();
matrix.postMult(camera->getViewport()->computeWindowMatrix());
osg::Matrixd inverse;
inverse.invert(matrix);
// transform touch-points into local coord-system
unsigned int j(0);
for(osgGA::GUIEventAdapter::TouchData::iterator i = touch_data->begin(); i != touch_data->end(); ++i, ++j)
{
osg::Vec3 local = osg::Vec3(i->x, i->y, 0) * inverse;
// std::cout << local << " hit: " << hitr->localIntersectionPoint << std::endl;
local.x() = (local.x() - bb.xMin()) / (bb.xMax() - bb.xMin());
local.z() = (local.z() - bb.zMin()) / (bb.zMax() - bb.zMin());
local.x() = (ea.getXmin() + local.x() * (ea.getXmax() - ea.getXmin()));
local.z() = (ea.getYmin() + local.z() * (ea.getYmax() - ea.getYmin()));
// std::cout << ea.getX() << "/" << ea.getY() << " -- " << i->x << " " << i->y << " -> " << local.x() <<"/" << local.z() << std::endl;
i->x = local.x();
i->y = 1 + local.z(); // no idea why I have to add 1 to get y in the range [0..1]
}
// std::cout << transformed_x << "/" << transformed_x << " -> " << cloned_ea->getX() << "/" <<cloned_ea->getY() << std::endl;
SlideEventHandler::instance()->forwardEventToDevices(cloned_ea.get());
}
else
{
if (ea.getEventType()==osgGA::GUIEventAdapter::PUSH)
{
_drawablesOnPush.insert( hitr->drawable.get() );
}
else if (ea.getEventType()==osgGA::GUIEventAdapter::MOVE)
{
OSG_INFO<<"Tooltip..."<<std::endl;
}
else if (ea.getEventType()==osgGA::GUIEventAdapter::RELEASE)
{
if (_drawablesOnPush.find(hitr->drawable.get()) != _drawablesOnPush.end())
doOperation();
return true;
}
}
}
}
break;
}
case(osgGA::GUIEventAdapter::KEYDOWN):
{
//OSG_NOTICE<<"PickEventHandler KEYDOWN "<<(char)ea.getKey()<<std::endl;
//if (object) OSG_NOTICE<<" "<<object->className()<<std::endl;
break;
}
default:
break;
}
return false;
}
inline void init_towbar()
{
body_s_ = findFirstNode((tow_visual_object_)->root(),"body_s");
body_b_ = findFirstNode((tow_visual_object_)->root(),"body_b");
body_a_ = findFirstNode((tow_visual_object_)->root(),"body_a");
osg::ComputeBoundsVisitor cbvs;
body_s_->accept( cbvs );
const osg::BoundingBox bb_s = cbvs.getBoundingBox();
osg::ComputeBoundsVisitor cbvb;
body_b_->accept( cbvb );
const osg::BoundingBox bb_b = cbvb.getBoundingBox();
osg::ComputeBoundsVisitor cbva;
body_a_->accept( cbva );
const osg::BoundingBox bb_a = cbva.getBoundingBox();
osg::ComputeBoundsVisitor cbv;
(tow_visual_object_)->root()->accept( cbv );
const osg::BoundingBox bb_ = cbv.getBoundingBox();
radius_ = abs(bb_.yMax() - bb_.yMin())/2.0;//(*tow_visual_object_)->root()->getBound().radius();
radius_s_ = abs(bb_s.yMax() - bb_s.yMin())/2.0;//body_s_->getBound().radius();
radius_a_ = abs(bb_a.yMax() - bb_a.yMin())/2.0;//body_a_->getBound().radius();
radius_b_ = abs(bb_b.yMax() - bb_b.yMin())/2.0;//body_b_->getBound().radius();
}
bool PickEventHandler::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa, osg::Object*, osg::NodeVisitor* nv)
{
if (ea.getHandled()) return false;
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::MOVE):
case(osgGA::GUIEventAdapter::PUSH):
case(osgGA::GUIEventAdapter::DRAG):
case(osgGA::GUIEventAdapter::RELEASE):
{
if(ea.getEventType() == osgGA::GUIEventAdapter::PUSH)
{
_drawablesOnPush.clear();
}
osgViewer::Viewer* viewer = dynamic_cast<osgViewer::Viewer*>(&aa);
osgUtil::LineSegmentIntersector::Intersections intersections;
if (viewer->computeIntersections(ea, nv->getNodePath(), intersections))
{
for(osgUtil::LineSegmentIntersector::Intersections::iterator hitr=intersections.begin();
hitr!=intersections.end();
++hitr)
{
if (_operation == FORWARD_EVENT)
{
osg::ref_ptr<osgGA::GUIEventAdapter> cloned_ea = osg::clone(&ea);
const osg::BoundingBox bb(hitr->drawable->getBound());
const osg::Vec3& p(hitr->localIntersectionPoint);
float transformed_x = (p.x() - bb.xMin()) / (bb.xMax() - bb.xMin());
float transformed_y = (p.z() - bb.zMin()) / (bb.zMax() - bb.zMin());
cloned_ea->setX(ea.getXmin() + transformed_x * (ea.getXmax() - ea.getXmin()));
cloned_ea->setY(ea.getYmin() + transformed_y * (ea.getYmax() - ea.getYmin()));
cloned_ea->setMouseYOrientation(osgGA::GUIEventAdapter::Y_INCREASING_UPWARDS);
// std::cout << transformed_x << "/" << transformed_x << " -> " << cloned_ea->getX() << "/" <<cloned_ea->getY() << std::endl;
// dispatch cloned event to devices
osgViewer::View::Devices& devices = viewer->getDevices();
for(osgViewer::View::Devices::iterator i = devices.begin(); i != devices.end(); ++i)
{
if((*i)->getCapabilities() & osgGA::Device::SEND_EVENTS)
{
(*i)->sendEvent(*cloned_ea);
}
}
}
else
{
if (ea.getEventType()==osgGA::GUIEventAdapter::PUSH)
{
_drawablesOnPush.insert( hitr->drawable.get() );
}
else if (ea.getEventType()==osgGA::GUIEventAdapter::MOVE)
{
OSG_INFO<<"Tooltip..."<<std::endl;
}
else if (ea.getEventType()==osgGA::GUIEventAdapter::RELEASE)
{
if (_drawablesOnPush.find(hitr->drawable.get()) != _drawablesOnPush.end())
doOperation();
return true;
}
}
}
}
break;
}
case(osgGA::GUIEventAdapter::KEYDOWN):
{
//OSG_NOTICE<<"PickEventHandler KEYDOWN "<<(char)ea.getKey()<<std::endl;
//if (object) OSG_NOTICE<<" "<<object->className()<<std::endl;
break;
}
default:
break;
}
return false;
}
void MxCore::lookAtAndFit( const osg::BoundingBox& bb )
{
// We'll get the view matrix to project the bounding box, so pre-configure it
// to point at the box center. Eye position doesn't matter at this point (we
// compute the eye position at the end of the function).
osg::Vec3d newDir = bb.center() - _position;
newDir.normalize();
setDir( newDir );
// Ttransform the bounding box vertices into eye space,
// then determine their x and y extents. We'll compare the eye
// space bb aspect ratio against the projection _aspect to
// determine the critical axis to fit.
osg::ref_ptr< osg::Vec3Array > corners = new osg::Vec3Array;
corners->resize( 8 );
( *corners )[ 0 ].set( bb._min );
( *corners )[ 1 ].set( bb._max.x(), bb._min.y(), bb._min.z() );
( *corners )[ 2 ].set( bb._max.x(), bb._min.y(), bb._max.z() );
( *corners )[ 3 ].set( bb._min.x(), bb._min.y(), bb._max.z() );
( *corners )[ 4 ].set( bb._max );
( *corners )[ 5 ].set( bb._min.x(), bb._max.y(), bb._max.z() );
( *corners )[ 6 ].set( bb._min.x(), bb._max.y(), bb._min.z() );
( *corners )[ 7 ].set( bb._max.x(), bb._max.y(), bb._min.z() );
osgwTools::transform( getInverseMatrix(), corners.get() );
// The 'corners' array of bb verts are now in eye space.
// Determine max and min values for eye space x and y
osg::Vec2 minEC( FLT_MAX, FLT_MAX ), maxEC( FLT_MIN, FLT_MIN );
unsigned int idx;
for( idx=0; idx<8; idx++ )
{
const osg::Vec3& v( ( *corners )[ idx ] );
minEC[ 0 ] = osg::minimum< float >( v.x(), minEC[ 0 ] );
minEC[ 1 ] = osg::minimum< float >( v.y(), minEC[ 1 ] );
maxEC[ 0 ] = osg::maximum< float >( v.x(), maxEC[ 0 ] );
maxEC[ 1 ] = osg::maximum< float >( v.y(), maxEC[ 1 ] );
}
// aspect is width (x) over height (y).
const double ecWidth( maxEC[ 0 ] - minEC[ 0 ] );
const double ecHeight( maxEC[ 1 ] - minEC[ 1 ] );
const double ecAspect = ecWidth / ecHeight;
// We'll store half the extent of interest into a dummy bounding sphere's radius.
// We'll store the analogous fov in bestFov.
osg::BoundingSphere bs;
double bestFov;
if( ecAspect > _aspect )
{
// Fit eye space x to the view
bs.radius() = ecWidth * .5;
bestFov = _aspect * _fovy;
}
else
{
// Fit eye space y to the view
bs.radius() = ecHeight * .5;
bestFov = _fovy;
}
// The wrap-up code sets the eye position at the best distance from
// the bb center. Extra distance is added in to account for the fact
// that the input bound probably has a larger radius than the eye coord
// bound that we're passing to computeInitialDistanceFromFOVY().
const double extraDistance = bb.radius() - bs.radius();
const double distance = extraDistance +
osgwMx::computeInitialDistanceFromFOVY( bs, bestFov );
setPosition( bs.center() - ( newDir * distance ) );
}
void
WriterCompareTriangle::cutscene(int nbVertices,
const osg::BoundingBox& sceneBox)
{
osg::BoundingBox::vec_type length = sceneBox._max - sceneBox._min;
static const unsigned int k = 4;
unsigned int nbVerticesX = (nbVertices * k) / (length.z() * length.y());
unsigned int nbVerticesY = (nbVertices * k) / (length.z() * length.x());
unsigned int nbVerticesZ = (nbVertices * k) / (length.x() * length.y());
setMaxMin (nbVerticesX, nbVerticesY, nbVerticesZ);
OSG_DEBUG << "Cutting x by " << nbVerticesX << std::endl
<< "Cutting y by " << nbVerticesY << std::endl
<< "Cutting z by " << nbVerticesZ << std::endl;
osg::BoundingBox::value_type blocX = length.x() / nbVerticesX; //These 3 lines set the size of a box in x, y and z
osg::BoundingBox::value_type blocY = length.y() / nbVerticesY;
osg::BoundingBox::value_type blocZ = length.z() / nbVerticesZ;
boxList.reserve(nbVerticesX * nbVerticesY * nbVerticesZ);
short yinc = 1;
short xinc = 1;
unsigned int y = 0;
unsigned int x = 0;
for (unsigned int z = 0; z < nbVerticesZ; ++z)
{
while (x < nbVerticesX && x >= 0)
{
while (y < nbVerticesY && y >= 0)
{
osg::BoundingBox::value_type xMin = sceneBox.xMin() + x * blocX;
if (x == 0) //to prevent from mesh with no case
xMin -= 10;
osg::BoundingBox::value_type yMin = sceneBox.yMin() + y * blocY;
if (y == 0) //to prevent from mesh with no case
yMin -= 10;
osg::BoundingBox::value_type zMin = sceneBox.zMin() + z * blocZ;
if (z == 0) //to prevent from mesh with no case
zMin -= 10;
osg::BoundingBox::value_type xMax = sceneBox.xMin() + (x + 1) * blocX;
if (x == nbVerticesX - 1) //to prevent from mesh with no case
xMax += 10;
osg::BoundingBox::value_type yMax = sceneBox.yMin() + (y + 1) * blocY;
if (y == nbVerticesY - 1) //to prevent from mesh with no case
yMax += 10;
osg::BoundingBox::value_type zMax = sceneBox.zMin() + (z + 1) * blocZ;
if (z == nbVerticesZ - 1) //to prevent from mesh with no case
zMax += 10;
boxList.push_back(osg::BoundingBox(xMin, // Add a box to the list
yMin,
zMin,
xMax,
yMax,
zMax));
y += yinc;
}
yinc = -yinc;
y += yinc;
x += xinc;
}
xinc = -xinc;
x += xinc;
}
}
bool IntersectKdTree::intersectAndClip(osg::Vec3& s, osg::Vec3& e, const osg::BoundingBox& bb) const
{
//return true;
//if (!bb.valid()) return true;
// compate s and e against the xMin to xMax range of bb.
if (s.x()<=e.x())
{
// trivial reject of segment wholely outside.
if (e.x()<bb.xMin()) return false;
if (s.x()>bb.xMax()) return false;
if (s.x()<bb.xMin())
{
// clip s to xMin.
s = s+_d_invX*(bb.xMin()-s.x());
}
if (e.x()>bb.xMax())
{
// clip e to xMax.
e = s+_d_invX*(bb.xMax()-s.x());
}
}
else
{
if (s.x()<bb.xMin()) return false;
if (e.x()>bb.xMax()) return false;
if (e.x()<bb.xMin())
{
// clip s to xMin.
e = s+_d_invX*(bb.xMin()-s.x());
}
if (s.x()>bb.xMax())
{
// clip e to xMax.
s = s+_d_invX*(bb.xMax()-s.x());
}
}
// compate s and e against the yMin to yMax range of bb.
if (s.y()<=e.y())
{
// trivial reject of segment wholely outside.
if (e.y()<bb.yMin()) return false;
if (s.y()>bb.yMax()) return false;
if (s.y()<bb.yMin())
{
// clip s to yMin.
s = s+_d_invY*(bb.yMin()-s.y());
}
if (e.y()>bb.yMax())
{
// clip e to yMax.
e = s+_d_invY*(bb.yMax()-s.y());
}
}
else
{
if (s.y()<bb.yMin()) return false;
if (e.y()>bb.yMax()) return false;
if (e.y()<bb.yMin())
{
// clip s to yMin.
e = s+_d_invY*(bb.yMin()-s.y());
}
if (s.y()>bb.yMax())
{
// clip e to yMax.
s = s+_d_invY*(bb.yMax()-s.y());
}
}
// compate s and e against the zMin to zMax range of bb.
if (s.z()<=e.z())
{
// trivial reject of segment wholely outside.
if (e.z()<bb.zMin()) return false;
if (s.z()>bb.zMax()) return false;
if (s.z()<bb.zMin())
{
// clip s to zMin.
s = s+_d_invZ*(bb.zMin()-s.z());
}
if (e.z()>bb.zMax())
{
// clip e to zMax.
e = s+_d_invZ*(bb.zMax()-s.z());
}
}
else
{
if (s.z()<bb.zMin()) return false;
if (e.z()>bb.zMax()) return false;
if (e.z()<bb.zMin())
{
// clip s to zMin.
e = s+_d_invZ*(bb.zMin()-s.z());
}
if (s.z()>bb.zMax())
{
// clip e to zMax.
s = s+_d_invZ*(bb.zMax()-s.z());
}
}
// OSG_NOTICE<<"clampped segment "<<s<<" "<<e<<std::endl;
// if (s==e) return false;
return true;
}
void WriterCompareTriangle::cutscene(int nbVertices, const osg::BoundingBox & sceneBox)
{
osg::BoundingBox::vec_type length = sceneBox._max - sceneBox._min;
static const float k = 1.3f; // Arbitrary constant multiplier for density computation ("simulates" non-uniform point distributions)
// Computes "density" of points, and thus the number of blocks to divide the mesh into
int nbVerticesX = static_cast<int>( (nbVertices * k) / (length.z() * length.y()) );
int nbVerticesY = static_cast<int>( (nbVertices * k) / (length.z() * length.x()) );
int nbVerticesZ = static_cast<int>( (nbVertices * k) / (length.x() * length.y()) );
setMaxMin (nbVerticesX, nbVerticesY, nbVerticesZ); // This function prevent from cutting the scene in too many blocs
OSG_INFO
<< "Cutting x by " << nbVerticesX << std::endl
<< "Cutting y by " << nbVerticesY << std::endl
<< "Cutting z by " << nbVerticesZ << std::endl;
osg::BoundingBox::value_type blocX = length.x() / nbVerticesX; // These 3 lines set the size of a bloc in x, y and z
osg::BoundingBox::value_type blocY = length.y() / nbVerticesY;
osg::BoundingBox::value_type blocZ = length.z() / nbVerticesZ;
boxList.reserve(nbVerticesX * nbVerticesY * nbVerticesZ);
short yinc = 1;
short xinc = 1;
int y = 0;
int x = 0;
for (int z = 0; z < nbVerticesZ; ++z)
{
while (x < nbVerticesX && x >= 0)
{
while (y < nbVerticesY && y >= 0)
{
osg::BoundingBox::value_type xMin = sceneBox.xMin() + x * blocX;
if (x == 0) //to prevent from mesh with no case
xMin -= 10;
osg::BoundingBox::value_type yMin = sceneBox.yMin() + y * blocY;
if (y == 0) //to prevent from mesh with no case
yMin -= 10;
osg::BoundingBox::value_type zMin = sceneBox.zMin() + z * blocZ;
if (z == 0) //to prevent from mesh with no case
zMin -= 10;
osg::BoundingBox::value_type xMax = sceneBox.xMin() + (x + 1) * blocX;
if (x == nbVerticesX - 1) //to prevent from mesh with no case
xMax += 10;
osg::BoundingBox::value_type yMax = sceneBox.yMin() + (y + 1) * blocY;
if (y == nbVerticesY - 1) //to prevent from mesh with no case
yMax += 10;
osg::BoundingBox::value_type zMax = sceneBox.zMin() + (z + 1) * blocZ;
if (z == nbVerticesZ - 1) //to prevent from mesh with no case
zMax += 10;
boxList.push_back(osg::BoundingBox(xMin, // Add a bloc to the list
yMin,
zMin,
xMax,
yMax,
zMax));
y += yinc;
}
yinc = -yinc;
y += yinc;
x += xinc;
}
xinc = -xinc;
x += xinc;
}
}
void MinimalShadowMap::ViewData::trimProjection
( osg::Matrixd & projectionMatrix, osg::BoundingBox bb, unsigned int trimMask )
{
#if 1
if( !bb.valid() || !( trimMask & (1|2|4|8|16|32) ) ) return;
double l = -1, r = 1, b = -1, t = 1, n = 1, f = -1;
#if 0
// make sure bounding box does not extend beyond unit frustum clip range
for( int i = 0; i < 3; i ++ ) {
if( bb._min[i] < -1 ) bb._min[i] = -1;
if( bb._max[i] > 1 ) bb._max[i] = 1;
}
#endif
if( trimMask & 1 ) l = bb._min[0];
if( trimMask & 2 ) r = bb._max[0];
if( trimMask & 4 ) b = bb._min[1];
if( trimMask & 8 ) t = bb._max[1];
if( trimMask & 16 ) n = -bb._min[2];
if( trimMask & 32 ) f = -bb._max[2];
projectionMatrix.postMult( osg::Matrix::ortho( l,r,b,t,n,f ) );
#else
if( !bb.valid() || !( trimMask & (1|2|4|8|16|32) ) ) return;
double l, r, t, b, n, f;
bool ortho = projectionMatrix.getOrtho( l, r, b, t, n, f );
if( !ortho && !projectionMatrix.getFrustum( l, r, b, t, n, f ) )
return; // rotated or skewed or other crooked projection - give up
// make sure bounding box does not extend beyond unit frustum clip range
for( int i = 0; i < 3; i ++ ) {
if( bb._min[i] < -1 ) bb._min[i] = -1;
if( bb._max[i] > 1 ) bb._max[i] = 1;
}
osg::Matrix projectionToView = osg::Matrix::inverse( projectionMatrix );
osg::Vec3 min =
osg::Vec3( bb._min[0], bb._min[1], bb._min[2] ) * projectionToView;
osg::Vec3 max =
osg::Vec3( bb._max[0], bb._max[1], bb._max[2] ) * projectionToView;
if( trimMask & 16 ) { // trim near
if( !ortho ) { // recalc frustum corners on new near plane
l *= -min[2] / n;
r *= -min[2] / n;
b *= -min[2] / n;
t *= -min[2] / n;
}
n = -min[2];
}
if( trimMask & 32 ) // trim far
f = -max[2];
if( !ortho ) {
min[0] *= -n / min[2];
min[1] *= -n / min[2];
max[0] *= -n / max[2];
max[1] *= -n / max[2];
}
if( l < r ) { // check for inverted X range
if( l < min[0] && ( trimMask & 1 ) ) l = min[0];
if( r > max[0] && ( trimMask & 2 ) ) r = max[0];
} else {
if( l > min[0] && ( trimMask & 1 ) ) l = min[0];
if( r < max[0] && ( trimMask & 2 ) ) r = max[0];
}
if( b < t ) { // check for inverted Y range
if( b < min[1] && ( trimMask & 4 ) ) b = min[1];
if( t > max[1] && ( trimMask & 8 ) ) t = max[1];
} else {
if( b > min[1] && ( trimMask & 4 ) ) b = min[1];
if( t < max[1] && ( trimMask & 8 ) ) t = max[1];
}
if( ortho )
projectionMatrix.makeOrtho( l, r, b, t, n, f );
else
projectionMatrix.makeFrustum( l, r, b, t, n, f );
#endif
}
osg::ref_ptr<osg::Geometry> HUDView::createRandNumBackground(osg::BoundingBox bb)
{
osg::ref_ptr<osg::Geometry> geom = new osg::Geometry;
osg::ref_ptr<osg::Vec3Array> vertices = new osg::Vec3Array;
osg::Vec3 sizeUpY(0, bb.yMax() + bb.yMax() / 2, 0.0);
osg::Vec3 sizeUpYN(0, -bb.yMax() / 2, 0.0);
bb.expandBy(sizeUpY);
bb.expandBy(sizeUpYN);
osg::Vec3 halfExtent((bb.xMax() - bb.xMin()) / 2.0, (bb.yMax() - bb.yMin()) / 2.0f, 0);
float x_length = bb.xMax() - bb.xMin();
float y_length = bb.yMax() - bb.yMin();
vertices->push_back(osg::Vec3(0, y_length, 0) - halfExtent);
vertices->push_back(osg::Vec3(0, 0, 0) - halfExtent);
vertices->push_back(osg::Vec3(x_length, 0, 0) - halfExtent);
vertices->push_back(osg::Vec3(x_length, y_length, 0) - halfExtent);
geom->setVertexArray(vertices);
osg::ref_ptr<osg::Vec3Array> normals = new osg::Vec3Array;
normals->push_back(osg::Vec3(0.0f, 0.0f, 1.0f));
geom->setNormalArray(normals, osg::Array::BIND_OVERALL);
osg::ref_ptr<osg::Vec4Array> colors = new osg::Vec4Array;
colors->push_back(osg::Vec4(0.0f, 0.2f, 1.0f, 0.7f));
geom->setColorArray(colors, osg::Array::BIND_OVERALL);
geom->addPrimitiveSet(new osg::DrawArrays(GL_QUADS, 0, 4));
osg::ref_ptr<osg::StateSet> stateset = geom->getOrCreateStateSet();
stateset->setMode(GL_BLEND, osg::StateAttribute::ON);
stateset->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
//stateset->setAttribute(new osg::PolygonOffset(1.0f,1.0f),osg::StateAttribute::ON);
stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
return geom;
}
