FGFS-4.1/OpenSceneGraph
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Added custom colour support to TransferFunction setup.

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This commit is contained in:
Robert Osfield 2007-07-16 15:47:42 +00:00
parent d4aaa31549
commit 166ac4a7d3
1 changed files with 51 additions and 9 deletions
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60
examples/osgterrain/ReaderWriterTerrain.cpp
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@ -294,24 +294,18 @@ osg::TransferFunction* ReaderWriterTerrain::readTransferFunction(osgDB::Input& f
{
osg::ref_ptr<osg::TransferFunction1D> tf = new osg::TransferFunction1D;
tf->allocate(6);
tf->setValue(0, osg::Vec4(1.0,1.0,1.0,1.0));
tf->setValue(1, osg::Vec4(1.0,0.0,1.0,1.0));
tf->setValue(2, osg::Vec4(1.0,0.0,0.0,1.0));
tf->setValue(3, osg::Vec4(1.0,1.0,0.0,1.0));
tf->setValue(4, osg::Vec4(0.0,1.0,1.0,1.0));
tf->setValue(5, osg::Vec4(0.0,1.0,0.0,1.0));
int entry = fr[0].getNoNestedBrackets();
fr += 2;
std::vector<osg::Vec4> colours;
while (!fr.eof() && fr[0].getNoNestedBrackets()>entry)
{
bool itrAdvanced = false;
if (fr.matchSequence("range %f %f"))
{
double minValue,maxValue;
float minValue,maxValue;
fr[1].getFloat(minValue);
fr[2].getFloat(maxValue);
@ -321,15 +315,63 @@ osg::TransferFunction* ReaderWriterTerrain::readTransferFunction(osgDB::Input& f
itrAdvanced = true;
}
if (fr.matchSequence("color %f %f %f %f"))
{
float r,g,b,a;
fr[1].getFloat(r);
fr[2].getFloat(g);
fr[3].getFloat(b);
fr[4].getFloat(a);
colours.push_back(osg::Vec4(r,g,b,a));
fr += 5;
itrAdvanced = true;
}
if (fr.matchSequence("color %f %f %f"))
{
float r,g,b;
fr[1].getFloat(r);
fr[2].getFloat(g);
fr[3].getFloat(b);
colours.push_back(osg::Vec4(r,g,b,1.0f));
fr += 5;
itrAdvanced = true;
}
if (!itrAdvanced)
{
if (fr[0].getStr()) osg::notify(osg::NOTICE)<<"TransferFunction - unreconised token : "<<fr[0].getStr() << std::endl;
++fr;
}
}
// step over trailing }
++fr;
if (!colours.empty())
{
tf->allocate(colours.size());
for(unsigned int i=0; i<colours.size(); ++i)
{
tf->setValue(i, colours[i]);
}
}
if (tf->getNumberCellsX()==0)
{
tf->allocate(6);
tf->setValue(0, osg::Vec4(1.0,1.0,1.0,1.0));
tf->setValue(1, osg::Vec4(1.0,0.0,1.0,1.0));
tf->setValue(2, osg::Vec4(1.0,0.0,0.0,1.0));
tf->setValue(3, osg::Vec4(1.0,1.0,0.0,1.0));
tf->setValue(4, osg::Vec4(0.0,1.0,1.0,1.0));
tf->setValue(5, osg::Vec4(0.0,1.0,0.0,1.0));
}
return tf.release();
}