void
TileNode::updateTileUniforms(const SelectionInfo& selectionInfo)
{
//assert(_surface.valid());
// update the tile key uniform
const osg::BoundingBox& bbox = _surface->getAlignedBoundingBox();
float width = std::max( (bbox.xMax()-bbox.xMin()), (bbox.yMax()-bbox.yMin()) );
unsigned tw, th;
_key.getProfile()->getNumTiles(_key.getLOD(), tw, th);
_tileKeyUniform->set(osg::Vec4f(_key.getTileX(), th-_key.getTileY()-1.0f, _key.getLOD(), width));
// update the morph constants
float start = (float)selectionInfo.visParameters(_key.getLOD())._fMorphStart;
float end = (float)selectionInfo.visParameters(_key.getLOD())._fMorphEnd;
float one_by_end_minus_start = end - start;
one_by_end_minus_start = 1.0f/one_by_end_minus_start;
osg::Vec2f morphConstants( end * one_by_end_minus_start, one_by_end_minus_start );
_tileMorphUniform->set( morphConstants );
const osg::Image* er = getElevationRaster();
if ( er )
{
// pre-calculate texel-sampling scale and bias coefficients that allow us to sample
// elevation textures on texel-center instead of edge:
float size = (float)er->s();
osg::Vec2f elevTexelOffsets( (size-1.0f)/size, 0.5/size );
getOrCreateStateSet()->getOrCreateUniform("oe_tile_elevTexelCoeff", osg::Uniform::FLOAT_VEC2)->set(elevTexelOffsets);
}
}
bool
TileNode::shouldSubDivide(TerrainCuller* culler, const SelectionInfo& selectionInfo)
{
unsigned currLOD = _key.getLOD();
EngineContext* context = culler->getEngineContext();
if (context->getOptions().rangeMode() == osg::LOD::PIXEL_SIZE_ON_SCREEN)
{
float pixelSize = -1.0;
if (context->getEngine()->getComputeRangeCallback())
{
pixelSize = (*context->getEngine()->getComputeRangeCallback())(this, *culler->_cv);
}
if (pixelSize <= 0.0)
{
pixelSize = culler->clampedPixelSize(getBound());
}
return (pixelSize > context->getOptions().tilePixelSize().get() * 4);
}
else
{
float range = (float)selectionInfo.visParameters(currLOD+1)._visibilityRange2;
if (currLOD < selectionInfo.getNumLODs() && currLOD != selectionInfo.getNumLODs()-1)
{
return _surface->anyChildBoxIntersectsSphere(
culler->getViewPointLocal(),
range,
culler->getLODScale());
}
}
return false;
}
bool
TileNode::shouldSubDivide(osgUtil::CullVisitor* cv, const SelectionInfo& selectionInfo)
{
unsigned currLOD = _key.getLOD();
if (currLOD < selectionInfo.numLods() && currLOD != selectionInfo.numLods()-1)
{
return _surface->anyChildBoxIntersectsSphere(
cv->getViewPointLocal(),
(float)selectionInfo.visParameters(currLOD+1)._visibilityRange2,
cv->getLODScale());
}
return false;
}
bool
TileNode::shouldSubDivide(osg::NodeVisitor& nv, const SelectionInfo& selectionInfo, float lodScale)
{
unsigned currLOD = _key.getLOD();
if ( currLOD < selectionInfo.numLods()
&& currLOD != selectionInfo.numLods()-1)
{
osg::Vec3 cameraPos = nv.getViewPoint();
float radius2 = (float)selectionInfo.visParameters(currLOD+1)._visibilityRange2;
return _surface->anyChildBoxIntersectsSphere(cameraPos, radius2, lodScale);
}
return false;
}
void
TileNode::updateTileUniforms(const SelectionInfo& selectionInfo)
{
//assert(_surface.valid());
// update the tile key uniform
const osg::BoundingBox& bbox = _surface->getAlignedBoundingBox();
float width = std::max( (bbox.xMax()-bbox.xMin()), (bbox.yMax()-bbox.yMin()) );
unsigned tw, th;
_key.getProfile()->getNumTiles(_key.getLOD(), tw, th);
_tileKeyUniform->set(osg::Vec4f(_key.getTileX(), th-_key.getTileY()-1.0f, _key.getLOD(), width));
// update the morph constants
float fStart = (float)selectionInfo.visParameters(_key.getLOD())._fMorphStart;
float fEnd = (float)selectionInfo.visParameters(_key.getLOD())._fMorphEnd;
float one_by_end_minus_start = fEnd - fStart;
one_by_end_minus_start = 1.0f/one_by_end_minus_start;
osg::Vec4f morphConstants(
fStart
, one_by_end_minus_start
, fEnd * one_by_end_minus_start
, one_by_end_minus_start
);
_tileMorphUniform->set( morphConstants );
// Update grid dims
float fGridDims = selectionInfo.gridDimX()-1;
_tileGridDimsUniform->set(osg::Vec4f(
fGridDims,
fGridDims*0.5f,
2.0/fGridDims,
selectionInfo.lodForMorphing(_key.getProfile()->getSRS()->isProjected())));
// update tile extents
float fXExtents = fabs(bbox.xMax()-bbox.xMin());
float fYExtents = fabs(bbox.yMax()-bbox.yMin());
_tileExtentsUniform->set(osg::Vec4f(fXExtents,fYExtents,0,0));
const osg::Image* er = getElevationRaster();
if ( er )
{
getOrCreateStateSet()->getOrCreateUniform("oe_tile_elevationSize", osg::Uniform::FLOAT)->set( (float)er->s() );
}
}
bool
TileNode::shouldSubDivide(osg::NodeVisitor& nv, const SelectionInfo& selectionInfo, float zoomFactor)
{
unsigned currLOD = _key.getLOD();
if ( currLOD < selectionInfo.numLods()
&& currLOD != selectionInfo.numLods()-1)
{
osg::Vec3 cameraPos = nv.getViewPoint();
#if OSGEARTH_REX_TILE_NODE_DEBUG_TRAVERSAL
OE_INFO << LC <<cameraPos.x()<<" "<<cameraPos.y()<<" "<<cameraPos.z()<<" "<<std::endl;
OE_INFO << LC <<"LOD Scale: "<<fZoomFactor<<std::endl;
#endif
float radius = (float)selectionInfo.visParameters(currLOD+1)._fVisibility;
bool anyChildVisible = _surface->anyChildBoxIntersectsSphere(cameraPos, radius*radius, zoomFactor);
return anyChildVisible;
}
return false;
}