FGFS-4.1/OpenSceneGraph
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Added rounding to nearest power of two in tile image size

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This commit is contained in:
Robert Osfield
2004-02-03 21:08:35 +00:00
parent 519496754c
commit 217a8519be
1 changed files with 5 additions and 0 deletions
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5
examples/osgdem/DataSet.cpp
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@@ -940,6 +940,7 @@ void DataSet::DestinationTile::computeMaximumSourceResolution(CompositeSource* s
}
}
bool DataSet::DestinationTile::computeImageResolution(unsigned int& numColumns, unsigned int& numRows, double& resX, double& resY)
{
if (_imagery_maxSourceResolutionX!=0.0f && _imagery_maxSourceResolutionY!=0.0f &&
@@ -950,6 +951,10 @@ bool DataSet::DestinationTile::computeImageResolution(unsigned int& numColumns,
unsigned int numRowsAtFullRes = 1+(unsigned int)ceilf((_extents.yMax()-_extents.yMin())/_imagery_maxSourceResolutionY);
numColumns = osg::minimum(_imagery_maxNumColumns,numColumnsAtFullRes);
numRows = osg::minimum(_imagery_maxNumRows,numRowsAtFullRes);
// round to nearest power of two
numColumns = osg::Image::computeNearestPowerOfTwo(numColumns);
numRows = osg::Image::computeNearestPowerOfTwo(numRows);
resX = (_extents.xMax()-_extents.xMin())/(double)(numColumns-1);
resY = (_extents.yMax()-_extents.yMin())/(double)(numRows-1);