FGFS-4.1/OpenSceneGraph
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Fixed the computation of terrain bounding volume so that it properly accounts for

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elevation layers
This commit is contained in:
Robert Osfield
2008-01-17 15:37:35 +00:00
parent ae33e4a459
commit efdc026114
4 changed files with 61 additions and 32 deletions
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62
src/osgTerrain/Layer.cpp
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@@ -34,32 +34,56 @@ Layer::~Layer()
{
}
osg::BoundingSphere Layer::computeBound() const
osg::BoundingSphere Layer::computeBound(bool treatAsElevationLayer) const
{
osg::BoundingSphere bs;
if (!getLocator()) return bs;
osg::Vec3d v;
if (getLocator()->convertLocalToModel(osg::Vec3d(0.0,0.0,0.0), v))
{
bs.expandBy(v);
}
if (getLocator()->convertLocalToModel(osg::Vec3d(1.0,0.0,0.0), v))
if (treatAsElevationLayer)
{
bs.expandBy(v);
}
osg::BoundingBox bb;
unsigned int numColumns = getNumColumns();
unsigned int numRows = getNumRows();
for(unsigned int r=0;r<numRows;++r)
{
for(unsigned int c=0;c<numColumns;++c)
{
float value = 0.0f;
bool validValue = getValidValue(c,r, value);
if (validValue)
{
osg::Vec3d ndc, v;
ndc.x() = ((double)c)/(double)(numColumns-1),
ndc.y() = ((double)r)/(double)(numRows-1);
ndc.z() = value;
if (getLocator()->convertLocalToModel(osg::Vec3d(1.0,1.0,0.0), v))
{
bs.expandBy(v);
if (getLocator()->convertLocalToModel(ndc, v))
{
bb.expandBy(v);
}
}
}
}
bs.expandBy(bb);
}
if (getLocator()->convertLocalToModel(osg::Vec3d(0.0,1.0,0.0), v))
else
{
bs.expandBy(v);
}
osg::Vec3d v;
if (getLocator()->convertLocalToModel(osg::Vec3d(0.5,0.5,0.0), v))
{
bs.center() = v;
}
if (getLocator()->convertLocalToModel(osg::Vec3d(0.0,0.0,0.0), v))
{
bs.expandBy(v);
bs.radius() = (bs.center() - v).length();
}
}
return bs;
}
@@ -431,8 +455,8 @@ unsigned int ProxyLayer::getModifiedCount() const
}
osg::BoundingSphere ProxyLayer::computeBound() const
osg::BoundingSphere ProxyLayer::computeBound(bool treatAsElevationLayer) const
{
if (_implementation.valid()) return _implementation->computeBound();
if (_implementation.valid()) return _implementation->computeBound(treatAsElevationLayer);
}