Inheritance diagram for seamless::Patch:

Classes
struct	Data
Public Member Functions
	Patch ()
	Patch (const Patch &rhs, const osg::CopyOp &copyop=osg::CopyOp::SHALLOW_COPY)
	META_Node (seamless, Patch)
virtual void	traverse (osg::NodeVisitor &nv)
virtual osg::BoundingSphere	computeBound () const
virtual void	resizeGLObjectBuffers (unsigned int maxSize)
virtual void	releaseGLObjects (osg::State *=0) const
virtual void	init ()
Data *	getData ()
const Data *	getData () const
void	setData (Data *data)
void	dirtyVertexData ()
float	getPatchError (const osg::Vec3 &eye)
virtual float	getEdgeError (const osg::Vec3 &eye, int edge)
void	setPatchSet (PatchSet *patchSet)
PatchSet *	getPatchSet () const
void	setErrorThreshold (float threshold)
float	getErrorThreshold () const
Protected Member Functions
	~Patch ()
Protected Attributes
osg::ref_ptr< osg::Geode >	_trile [2][4]
osg::ref_ptr< osg::Geode >	_strip [4][4]
osg::ref_ptr< Data >	_data
osg::ref_ptr< PatchSet >	_patchSet
float	_errorThreshold

Detailed Description

Definition at line 32 of file Patch.

Constructor & Destructor Documentation

seamless::Patch::Patch ( )

Definition at line 43 of file Patch.cpp.

    : _errorThreshold(.5f)
{
}

seamless::Patch::Patch	(	const Patch &	rhs,
		const osg::CopyOp &	copyop = `osg::CopyOp::SHALLOW_COPY`
	)

seamless::Patch::~Patch ( ) [protected]

Definition at line 63 of file Patch.cpp.

{
}

Member Function Documentation

BoundingSphere seamless::Patch::computeBound ( ) const [virtual]

Definition at line 262 of file Patch.cpp.

{
    BoundingSphere bsphere;
    if (!_trile[0][0].valid())
        return bsphere;
    BoundingBox bb;
    bb.init();
    for (int res = 0; res < 2; ++res)
        for (int i = 0; i < 4; ++i)
            bb.expandBy(_trile[res][i]->getBoundingBox());
    for (int strip = 0; strip < 4; ++strip)
        for (int i = 0; i < 4; ++i)
            bb.expandBy(_strip[strip][i]->getBoundingBox());
    if (!bb.valid())
        return bsphere;
    bsphere.expandBy(bb);
    return bsphere;
}

void seamless::Patch::dirtyVertexData ( )

Dirty vertex data. A convenience method.

Definition at line 90 of file Patch.cpp.

{
    Geometry::ArrayData& vdata = _data->vertexData;
    if (vdata.array.valid())
        vdata.array->dirty();
}

const Data* seamless::Patch::getData ( ) const [inline]

Definition at line 70 of file Patch.

{ return _data.get(); }

Data* seamless::Patch::getData ( ) [inline]

Definition at line 69 of file Patch.

{ return _data.get(); }

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float seamless::Patch::getEdgeError	(	const osg::Vec3 &	eye,
		int	edge
	)		`[virtual]`

Reimplemented in seamless::GeoPatch.

Definition at line 208 of file Patch.cpp.

{
    Vec3 p1, p2;
    getEdge(this, p1, p2, edge);
    float len = (p2 - p1).length();
    Vec3 closestPt =  closestPointOnSegment(p1, p2, eye);
    float d = (closestPt - eye).length();
    return _patchSet->getPrecisionFactor() * len / d;
}

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float seamless::Patch::getErrorThreshold ( ) const [inline]

Definition at line 91 of file Patch.

{ return _errorThreshold; }

float seamless::Patch::getPatchError ( const osg::Vec3 & eye )

Get patch error. This is the maximum of the edge errors.

Parameters:

eye	The eyepoint in local coordinates.

Definition at line 218 of file Patch.cpp.

{
    float epsilon = getEdgeError(eye, 0);
    for (int i = 1; i < 4; ++i)
        epsilon = maximum(epsilon, getEdgeError(eye, i));
    return epsilon;
}

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PatchSet * seamless::Patch::getPatchSet ( ) const

Definition at line 307 of file Patch.cpp.

{
    return _patchSet.get();
}

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void seamless::Patch::init ( ) [virtual]

Definition at line 133 of file Patch.cpp.

{
    for (int res = 0; res < 2; ++res)
    {
        for (int trile = 0; trile < 4; ++trile)
        {
            Geometry* geom = new Geometry;
            geom->setUseVertexBufferObjects(true);
            _data->setGeometryAttributes(geom);
            geom->addPrimitiveSet(_patchSet->trilePset[res][trile]);
            _trile[res][trile] = new Geode;
            _trile[res][trile]->addDrawable(geom);
        }
    }
    for (int j = 0; j < 4; ++j)
    {
        for (int i = 0; i < 4; ++i)
        {
            Geometry* geom = new Geometry;
            geom->setUseVertexBufferObjects(true);
            _data->setGeometryAttributes(geom);
            geom->addPrimitiveSet(_patchSet->stripPset[j][i]);
            _strip[j][i] = new Geode;
            _strip[j][i]->addDrawable(geom);
        }
    }
}

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seamless::Patch::META_Node	(	seamless	,
		Patch
	)

void seamless::Patch::releaseGLObjects ( osg::State * = 0 ) const [virtual]

Definition at line 292 of file Patch.cpp.

{
    Node::releaseGLObjects(state);
    if (!_trile[0][0].valid())
        return;
    for (int res = 0; res < 2; ++res)
        for (int i = 0; i < 4; ++i)
            _trile[res][i]->releaseGLObjects(state);
}

void seamless::Patch::resizeGLObjectBuffers ( unsigned int maxSize ) [virtual]

Definition at line 281 of file Patch.cpp.

{
    Node::resizeGLObjectBuffers(maxSize);

    if (!_trile[0][0].valid())
        return;
    for (int res = 0; res < 2; ++res)
        for (int i = 0; i < 4; ++i)
            _trile[res][i]->resizeGLObjectBuffers(maxSize);
}

void seamless::Patch::setData ( Data * data ) [inline]

Definition at line 71 of file Patch.

    {
        _data = data;
        init();
    }

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void seamless::Patch::setErrorThreshold ( float threshold ) [inline]

Set error threshold between high and low resolution LOD. Default is .5.

Definition at line 90 of file Patch.

{ _errorThreshold = threshold; }

void seamless::Patch::setPatchSet ( PatchSet * patchSet )

Definition at line 302 of file Patch.cpp.

{
    _patchSet = patchSet;
}

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virtual void seamless::Patch::traverse ( osg::NodeVisitor & nv ) [virtual]

Member Data Documentation

osg::ref_ptr<Data> seamless::Patch::_data [protected]

Definition at line 104 of file Patch.

float seamless::Patch::_errorThreshold [protected]

Definition at line 106 of file Patch.

osg::ref_ptr<PatchSet> seamless::Patch::_patchSet [protected]

Definition at line 105 of file Patch.

osg::ref_ptr<osg::Geode> seamless::Patch::_strip[4][4] [protected]

Definition at line 103 of file Patch.

osg::ref_ptr<osg::Geode> seamless::Patch::_trile[2][4] [protected]

Definition at line 96 of file Patch.

The documentation for this class was generated from the following files:

/home/cube/sources/osgearth/src/osgEarthDrivers/engine_seamless/Patch
/home/cube/sources/osgearth/src/osgEarthDrivers/engine_seamless/Patch.cpp

seamless::Patch Class Reference

Classes

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation