void StrokeIntersector::intersect(osgUtil::IntersectionVisitor &iv, osg::Drawable *drawable)
{
osg::BoundingBox bb = drawable->getBoundingBox();
bb.xMin() -= m_offset; bb.xMax() += m_offset;
bb.yMin() -= m_offset; bb.yMax() += m_offset;
bb.zMin() -= m_offset; bb.zMax() += m_offset;
osg::Vec3d s(_start), e(_end);
if (!intersectAndClip(s, e, bb)) return;
if (iv.getDoDummyTraversal()) return;
entity::Stroke* geometry = dynamic_cast<entity::Stroke*>(drawable->asGeometry());
if (geometry)
{
osg::Vec3Array* vertices = dynamic_cast<osg::Vec3Array*>(geometry->getVertexArray());
if (!vertices) return;
for (unsigned int i=1; i<vertices->size(); ++i)
{
double distance = Utilities::getSkewLinesDistance(s,e,(*vertices)[i], (*vertices)[i-1]);
if (m_offset<distance) continue;
Intersection hit;
hit.ratio = distance;
hit.nodePath = iv.getNodePath();
hit.drawable = drawable;
hit.matrix = iv.getModelMatrix();
hit.localIntersectionPoint = (*vertices)[i];
m_hitIndices.push_back(i);
insertIntersection(hit);
}
}
}
void PosterIntersector::intersect( osgUtil::IntersectionVisitor& iv, osg::Drawable* drawable )
{
if ( !_polytope.contains(drawable->getBound()) ) return;
if ( iv.getDoDummyTraversal() ) return;
// Find and collect all paged LODs in the node path
osg::NodePath& nodePath = iv.getNodePath();
for ( osg::NodePath::iterator itr=nodePath.begin(); itr!=nodePath.end(); ++itr )
{
osg::PagedLOD* pagedLOD = dynamic_cast<osg::PagedLOD*>(*itr);
if ( pagedLOD )
{
// FIXME: The first non-empty getFileName() is used as the identity of this paged node.
// This should work with VPB-generated terrains but maybe unusable with others.
for ( unsigned int i=0; i<pagedLOD->getNumFileNames(); ++i )
{
if ( pagedLOD->getFileName(i).empty() ) continue;
if ( _parent->_visitor.valid() )
_parent->_visitor->insertName( pagedLOD->getFileName(i) );
break;
}
continue;
}
/*osg::LOD* lod = dynamic_cast<osg::LOD*>(*itr);
if ( lod )
{
if ( !lod->getName().empty() && _parent->_visitor.valid() )
_parent->_visitor->insertName( lod->getName() );
}*/
}
}
void PrimitiveIntersector::intersect(osgUtil::IntersectionVisitor& iv, osg::Drawable* drawable)
{
if (reachedLimit() || !drawable) return;
osg::BoundingBox bb = drawable->getBoundingBox();
if (bb.valid())
bb.expandBy(osg::BoundingSphere(bb.center(), (_thickness - _start).length()));
osg::Vec3d s(_start), e(_end);
if ( !intersectAndClip( s, e, bb ) ) return;
if (iv.getDoDummyTraversal()) return;
osg::TemplatePrimitiveFunctor<PrimitiveIntersectorFunctor> ti;
ti.set(s,e,_thickness-_start);
ti._limitOneIntersection = (_intersectionLimit == LIMIT_ONE_PER_DRAWABLE || _intersectionLimit == LIMIT_ONE);
drawable->accept(ti);
if (ti._hit)
{
osg::Geometry* geometry = drawable->asGeometry();
for(PrimitiveIntersections::iterator thitr = ti._intersections.begin(); thitr != ti._intersections.end(); ++thitr)
{
// get ratio in s,e range
double ratio = thitr->first;
// remap ratio into _start, _end range
double remap_ratio = ((s-_start).length() + ratio * (e-s).length() )/(_end-_start).length();
if ( _intersectionLimit == LIMIT_NEAREST && !getIntersections().empty() )
{
if (remap_ratio >= getIntersections().begin()->ratio )
break;
else
getIntersections().clear();
}
PrimitiveIntersection& triHit = thitr->second;
Intersection hit;
hit.ratio = remap_ratio;
hit.matrix = iv.getModelMatrix();
hit.nodePath = iv.getNodePath();
hit.drawable = drawable;
hit.primitiveIndex = findPrimitiveIndex(drawable, triHit._index);
hit.localIntersectionPoint = _start*(1.0-remap_ratio) + _end*remap_ratio;
hit.localIntersectionNormal = triHit._normal;
if (geometry)
{
osg::Vec3Array* vertices = dynamic_cast<osg::Vec3Array*>(geometry->getVertexArray());
if (vertices)
{
osg::Vec3* first = &(vertices->front());
if (triHit._v1)
{
hit.indexList.push_back(triHit._v1-first);
hit.ratioList.push_back(triHit._r1);
}
if (triHit._v2)
{
hit.indexList.push_back(triHit._v2-first);
hit.ratioList.push_back(triHit._r2);
}
if (triHit._v3)
{
hit.indexList.push_back(triHit._v3-first);
hit.ratioList.push_back(triHit._r3);
}
}
}
insertIntersection(hit);
}
}
}
void
DPLineSegmentIntersector::intersect(osgUtil::IntersectionVisitor& iv, osg::Drawable* drawable)
{
if (reachedLimit()) return;
osg::Vec3d s(_start), e(_end);
if ( !intersectAndClip( s, e, drawable->getBound() ) ) return;
if (iv.getDoDummyTraversal()) return;
osg::KdTree* kdTree = iv.getUseKdTreeWhenAvailable() ? dynamic_cast<osg::KdTree*>(drawable->getShape()) : 0;
if (kdTree)
{
osg::KdTree::LineSegmentIntersections intersections;
intersections.reserve(4);
if (kdTree->intersect(s,e,intersections))
{
// OSG_NOTICE<<"Got KdTree intersections"<<std::endl;
for(osg::KdTree::LineSegmentIntersections::iterator itr = intersections.begin();
itr != intersections.end();
++itr)
{
osg::KdTree::LineSegmentIntersection& lsi = *(itr);
// get ratio in s,e range
double ratio = lsi.ratio;
// remap ratio into _start, _end range
double remap_ratio = ((s-_start).length() + ratio * (e-s).length() )/(_end-_start).length();
Intersection hit;
hit.ratio = remap_ratio;
hit.matrix = iv.getModelMatrix();
hit.nodePath = iv.getNodePath();
hit.drawable = drawable;
hit.primitiveIndex = lsi.primitiveIndex;
hit.localIntersectionPoint = _start*(1.0-remap_ratio) + _end*remap_ratio;
// OSG_NOTICE<<"KdTree: ratio="<<hit.ratio<<" ("<<hit.localIntersectionPoint<<")"<<std::endl;
hit.localIntersectionNormal = lsi.intersectionNormal;
hit.indexList.reserve(3);
hit.ratioList.reserve(3);
if (lsi.r0!=0.0f)
{
hit.indexList.push_back(lsi.p0);
hit.ratioList.push_back(lsi.r0);
}
if (lsi.r1!=0.0f)
{
hit.indexList.push_back(lsi.p1);
hit.ratioList.push_back(lsi.r1);
}
if (lsi.r2!=0.0f)
{
hit.indexList.push_back(lsi.p2);
hit.ratioList.push_back(lsi.r2);
}
insertIntersection(hit);
}
}
return;
}
// GW: changed this ONE line
osg::TriangleFunctor<DoublePrecisionTriangleIntersector> ti;
ti.set(s,e);
ti._limitOneIntersection = (_intersectionLimit == LIMIT_ONE_PER_DRAWABLE || _intersectionLimit == LIMIT_ONE);
drawable->accept(ti);
if (ti._hit)
{
osg::Geometry* geometry = drawable->asGeometry();
for(TriangleIntersections::iterator thitr = ti._intersections.begin();
thitr != ti._intersections.end();
++thitr)
{
// get ratio in s,e range
double ratio = thitr->first;
// remap ratio into _start, _end range
double remap_ratio = ((s-_start).length() + ratio * (e-s).length() )/(_end-_start).length();
if ( _intersectionLimit == LIMIT_NEAREST && !getIntersections().empty() )
{
if (remap_ratio >= getIntersections().begin()->ratio )
break;
else
getIntersections().clear();
}
TriangleIntersection& triHit = thitr->second;
Intersection hit;
hit.ratio = remap_ratio;
hit.matrix = iv.getModelMatrix();
hit.nodePath = iv.getNodePath();
hit.drawable = drawable;
hit.primitiveIndex = triHit._index;
hit.localIntersectionPoint = _start*(1.0-remap_ratio) + _end*remap_ratio;
// OSG_NOTICE<<"Conventional: ratio="<<hit.ratio<<" ("<<hit.localIntersectionPoint<<")"<<std::endl;
hit.localIntersectionNormal = triHit._normal;
if (geometry)
{
osg::Vec3Array* vertices = dynamic_cast<osg::Vec3Array*>(geometry->getVertexArray());
if (vertices)
{
osg::Vec3* first = &(vertices->front());
if (triHit._v1)
{
hit.indexList.push_back(triHit._v1-first);
hit.ratioList.push_back(triHit._r1);
}
if (triHit._v2)
{
hit.indexList.push_back(triHit._v2-first);
hit.ratioList.push_back(triHit._r2);
}
if (triHit._v3)
{
hit.indexList.push_back(triHit._v3-first);
hit.ratioList.push_back(triHit._r3);
}
}
}
insertIntersection(hit);
}
}
}