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From Jan Peciva, RayIntersector implementation

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This commit is contained in:
Robert Osfield
2013-10-03 08:45:57 +00:00
parent 69f2fb56b3
commit 83c396b13b
6 changed files with 525 additions and 15 deletions
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31
src/osgUtil/LineSegmentIntersector.cpp
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@@ -77,7 +77,7 @@ namespace LineSegmentIntersectorUtils
_limitOneIntersection = false;
}
void set(const osg::Vec3d& start, osg::Vec3d& end, float ratio=FLT_MAX)
void set(const osg::Vec3d& start, const osg::Vec3d& end, float ratio=FLT_MAX)
{
_hit=false;
_index = 0;
@@ -216,8 +216,9 @@ LineSegmentIntersector::LineSegmentIntersector(const osg::Vec3d& start, const os
{
}
LineSegmentIntersector::LineSegmentIntersector(CoordinateFrame cf, const osg::Vec3d& start, const osg::Vec3d& end):
Intersector(cf),
LineSegmentIntersector::LineSegmentIntersector(CoordinateFrame cf, const osg::Vec3d& start, const osg::Vec3d& end,
LineSegmentIntersector* parent, osgUtil::Intersector::IntersectionLimit intersectionLimit):
Intersector(cf, intersectionLimit),
_parent(0),
_start(start),
_end(end)
@@ -249,8 +250,18 @@ Intersector* LineSegmentIntersector::clone(osgUtil::IntersectionVisitor& iv)
// compute the matrix that takes this Intersector from its CoordinateFrame into the local MODEL coordinate frame
// that geometry in the scene graph will always be in.
osg::Matrix matrix(getTransformation(iv, _coordinateFrame));
osg::ref_ptr<LineSegmentIntersector> lsi = new LineSegmentIntersector(_start * matrix, _end * matrix);
lsi->_parent = this;
lsi->_intersectionLimit = this->_intersectionLimit;
return lsi.release();
}
osg::Matrix LineSegmentIntersector::getTransformation(IntersectionVisitor& iv, CoordinateFrame cf)
{
osg::Matrix matrix;
switch (_coordinateFrame)
switch (cf)
{
case(WINDOW):
if (iv.getWindowMatrix()) matrix.preMult( *iv.getWindowMatrix() );
@@ -274,11 +285,7 @@ Intersector* LineSegmentIntersector::clone(osgUtil::IntersectionVisitor& iv)
osg::Matrix inverse;
inverse.invert(matrix);
osg::ref_ptr<LineSegmentIntersector> lsi = new LineSegmentIntersector(_start * inverse, _end * inverse);
lsi->_parent = this;
lsi->_intersectionLimit = this->_intersectionLimit;
return lsi.release();
return inverse;
}
bool LineSegmentIntersector::enter(const osg::Node& node)
@@ -301,6 +308,12 @@ void LineSegmentIntersector::intersect(osgUtil::IntersectionVisitor& iv, osg::Dr
if (iv.getDoDummyTraversal()) return;
intersect(iv, drawable, s, e);
}
void LineSegmentIntersector::intersect(osgUtil::IntersectionVisitor& iv, osg::Drawable* drawable,
const osg::Vec3d& s, const osg::Vec3d& e)
{
osg::KdTree* kdTree = iv.getUseKdTreeWhenAvailable() ? dynamic_cast<osg::KdTree*>(drawable->getShape()) : 0;
if (kdTree)
{