FGFS-4.1/OpenSceneGraph
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Converted osg::LOD from used n+1 successive ranges to n min/max ranges,

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one min/max pair per child. Converted the rest of the OSG to use the new
osg::LOD node.
This commit is contained in:
Robert Osfield
2002-10-06 20:33:13 +00:00
parent 84332f5b77
commit 70861ef70e
19 changed files with 240 additions and 195 deletions
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41
src/osgUtil/CullVisitor.cpp
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@@ -132,6 +132,25 @@ void CullVisitor::reset()
}
float CullVisitor::getDistanceToEyePoint(const Vec3& pos, bool withLODBias) const
{
if (withLODBias) return (pos-getEyeLocal()).length()*getLODBias();
else return (pos-getEyeLocal()).length();
}
inline float distance(const osg::Vec3& coord,const osg::Matrix& matrix)
{
return -(coord[0]*matrix(0,2)+coord[1]*matrix(1,2)+coord[2]*matrix(2,2)+matrix(3,2));
}
float CullVisitor::getDistanceFromEyePoint(const osg::Vec3& pos, bool withLODBias) const
{
const Matrix& matrix = *_modelviewStack.back();
float dist = distance(pos,matrix);
if (withLODBias) return dist*getLODBias();
else return dist*getLODBias();
}
void CullVisitor::popProjectionMatrix()
{
@@ -168,10 +187,6 @@ void CullVisitor::popProjectionMatrix()
CullStack::popProjectionMatrix();
}
inline float distance(const osg::Vec3& coord,const osg::Matrix& matrix)
{
return -(coord[0]*matrix(0,2)+coord[1]*matrix(1,2)+coord[2]*matrix(2,2)+matrix(3,2));
}
void CullVisitor::updateCalculatedNearFar(const osg::Matrix& matrix,const osg::BoundingBox& bb)
@@ -459,9 +474,6 @@ void CullVisitor::apply(LOD& node)
{
if (isCulled(node)) return;
int eval = node.evaluate(getEyeLocal(),_LODBias);
if (eval<0) return;
// push the culling mode.
pushCurrentMask();
@@ -469,8 +481,7 @@ void CullVisitor::apply(LOD& node)
StateSet* node_state = node.getStateSet();
if (node_state) pushStateSet(node_state);
//notify(INFO) << "selecting child "<<eval<< std::endl;
handle_cull_callbacks_and_accept(node,node.getChild(eval));
handle_cull_callbacks_and_traverse(node);
// pop the node's state off the render graph stack.
if (node_state) popStateSet();
@@ -538,9 +549,6 @@ void CullVisitor::apply(Impostor& node)
osg::Vec3 eyeLocal = getEyeLocal();
int eval = node.evaluate(eyeLocal,_LODBias);
if (eval<0) return;
// push the culling mode.
pushCurrentMask();
@@ -557,13 +565,13 @@ void CullVisitor::apply(Impostor& node)
{
// outwith the impostor distance threshold therefore simple
// traverse the appropriate child of the LOD.
handle_cull_callbacks_and_accept(node,node.getChild(eval));
handle_cull_callbacks_and_traverse(node);
}
else if (_viewportStack.empty())
{
// need to use impostor but no valid viewport is defined to simply
// default to using the LOD child as above.
handle_cull_callbacks_and_accept(node,node.getChild(eval));
handle_cull_callbacks_and_traverse(node);
}
else
{
@@ -623,7 +631,7 @@ void CullVisitor::apply(Impostor& node)
{
// no impostor has been selected or created so default to
// traversing the usual LOD selected child.
handle_cull_callbacks_and_accept(node,node.getChild(eval));
handle_cull_callbacks_and_traverse(node);
}
}
@@ -645,7 +653,6 @@ ImpostorSprite* CullVisitor::createImpostorSprite(Impostor& node)
const Matrix& matrix = getModelViewMatrix();
const BoundingSphere& bs = node.getBound();
osg::Vec3 eye_local = getEyeLocal();
int eval = node.evaluate(eye_local,_LODBias);
if (!bs.valid())
{
@@ -777,7 +784,7 @@ ImpostorSprite* CullVisitor::createImpostorSprite(Impostor& node)
{
// traversing the usual LOD selected child.
handle_cull_callbacks_and_accept(node,node.getChild(eval));
handle_cull_callbacks_and_traverse(node);
}