/*! The IntersectAction callback for Geometry. It computes if the ray used in
the IntersectAction \a action hits this object and if that is the case,
which triangle is hit.
\param[in] action IntersectAction performing the intersect test.
\return Action result code, \see OSG::Action.
\note This method is registered with the IntersectAction and automatically
called from there, you probably never have to call it manually.
*/
Action::ResultE Geometry::intersect(Action * action)
{
IntersectAction *ia = dynamic_cast<IntersectAction*>(action);
ia->getActNode()->updateVolume();
const BoxVolume &bv = ia->getActNode()->getVolume();
if(bv.isValid() && !bv.intersect(ia->getLine()))
{
return Action::Skip; //bv missed -> can not hit children
}
TriangleIterator it = this->beginTriangles();
TriangleIterator end = this->endTriangles ();
Real32 t;
Vec3f norm;
Line ia_line(ia->getLine());
for(; it != end; ++it)
{
if(ia_line.intersect(it.getPosition(0),
it.getPosition(1),
it.getPosition(2), t, &norm))
{
ia->setHit(t, ia->getActNode(), it.getIndex(), norm, -1);
}
}
// If we need to test lines, iterate over lines and test for
// lines that are within width distance from the line
if(ia->getTestLines())
{
Real32 range_sq = ia->getTestLineWidth();
range_sq = range_sq * range_sq;
LineIterator it = this->beginLines();
LineIterator end = this->endLines ();
Pnt3f pt1, pt2;
OSG::Vec3f norm;
// Find closest points and if they are within the range, then add a hit
for(; it != end; ++it)
{
Line cur_line(it.getPosition(0), it.getPosition(1));
ia_line.getClosestPoints(cur_line, pt1, pt2);
Real32 dist_sq( pt1.dist2(pt2) );
if (dist_sq <= range_sq)
{
t = ia_line.getPosition().dist(pt1);
ia->setHit(t, ia->getActNode(), -1, norm, it.getIndex());
}
}
}
return Action::Continue;
}
bool INIFile::setLine(LineIterator line_it, const String& line)
{
// section lines cannot be changed with this method
if (!isValid(line_it) || (*line_it)[0] == '[')
{
return false;
}
String new_key(line.before("="));
new_key.trim();
if ((*line_it).hasSubstring("=", 1))
{
// oh, this line had a key :(
String old_key((*line_it).before("="));
old_key.trim();
if (old_key == new_key)
{
line_it.setLine_(line);
return true;
}
// its a new key: delete the old one.
line_it.getSection()->key_map_.remove(old_key);
}
line_it.setLine_(line);
if (line.hasSubstring("=", 1))
{
// oh, the new line has a key :(
line_it.getSection()->key_map_[new_key] = line_it.getPosition();
}
return true;
}
