FGFS-4.1/OpenSceneGraph
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Added new Node/Drawable::s/getInitialBound and Node/Drawable::s/getComputeBoundCallback

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methods and reimplement computeBound so that it passes back a bounding volume rather
than modifying the local one.
This commit is contained in:
Robert Osfield
2005-05-12 14:03:22 +00:00
parent ad2bd31ac8
commit bf4d63f6ea
52 changed files with 337 additions and 377 deletions
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34
src/osg/Transform.cpp
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@@ -121,9 +121,10 @@ void Transform::setReferenceFrame(ReferenceFrame rf)
setCullingActive(_referenceFrame==RELATIVE_RF);
}
bool Transform::computeBound() const
BoundingSphere Transform::computeBound() const
{
if (!Group::computeBound()) return false;
BoundingSphere bsphere = Group::computeBound();
if (!bsphere.valid()) return bsphere;
// note, NULL pointer for NodeVisitor, so compute's need
// to handle this case gracefully, normally this should not be a problem.
@@ -131,33 +132,34 @@ bool Transform::computeBound() const
computeLocalToWorldMatrix(l2w,NULL);
Vec3 xdash = _bsphere._center;
xdash.x() += _bsphere._radius;
Vec3 xdash = bsphere._center;
xdash.x() += bsphere._radius;
xdash = xdash*l2w;
Vec3 ydash = _bsphere._center;
ydash.y() += _bsphere._radius;
Vec3 ydash = bsphere._center;
ydash.y() += bsphere._radius;
ydash = ydash*l2w;
Vec3 zdash = _bsphere._center;
zdash.z() += _bsphere._radius;
Vec3 zdash = bsphere._center;
zdash.z() += bsphere._radius;
zdash = zdash*l2w;
_bsphere._center = _bsphere._center*l2w;
xdash -= _bsphere._center;
bsphere._center = bsphere._center*l2w;
xdash -= bsphere._center;
float len_xdash = xdash.length();
ydash -= _bsphere._center;
ydash -= bsphere._center;
float len_ydash = ydash.length();
zdash -= _bsphere._center;
zdash -= bsphere._center;
float len_zdash = zdash.length();
_bsphere._radius = len_xdash;
if (_bsphere._radius<len_ydash) _bsphere._radius = len_ydash;
if (_bsphere._radius<len_zdash) _bsphere._radius = len_zdash;
bsphere._radius = len_xdash;
if (bsphere._radius<len_ydash) bsphere._radius = len_ydash;
if (bsphere._radius<len_zdash) bsphere._radius = len_zdash;
return true;
return bsphere;
}