bool
avtLookupTable::SetColorTable(const char *ctName, bool validName,
bool useOpacities)
{
bool retval = false;
bool useDefault = false;
avtColorTables *ct = avtColorTables::Instance();
// Figure out the circumstances in which we should use the default
// color table.
if(ctName == NULL)
useDefault = true;
else if(std::string(ctName) == "Default")
useDefault = true;
else if(!ct->ColorTableExists(ctName))
{
EXCEPTION1(InvalidColortableException, ctName);
}
if(useDefault)
{
// Use the default color table.
const char *dct = ct->GetDefaultContinuousColorTable().c_str();
if(dct == 0)
dct = ct->GetDefaultDiscreteColorTable().c_str();
const unsigned char *c = ct->GetColors(dct);
const unsigned char *a = NULL;
if (useOpacities)
a = ct->GetAlphas(dct);
if(c != NULL)
{
// Set the colors into the lookup table.
retval = true;
if (a)
SetLUTColorsAndOpacity(c, a, ct->GetNumColors());
else
SetLUTColors(c, ct->GetNumColors());
}
}
else if (validName)
{
// Use the specified color table. It was a valid color table.
const unsigned char *c = ct->GetColors(ctName);
const unsigned char *a = NULL;
if (useOpacities)
a = ct->GetAlphas(ctName);
if(c != NULL)
{
// Set the colors into the lookup table.
retval = true;
if (a)
SetLUTColorsAndOpacity(c, a, ct->GetNumColors());
else
SetLUTColors(c, ct->GetNumColors());
}
}
return retval;
}
bool
avtLookupTable::SetColorTable(const char *ctName, bool validName,
bool useOpacities,
bool invert,
double rampOpacity)
{
avtColorTables *ct = avtColorTables::Instance();
const unsigned char *c = NULL;
// Figure out the circumstances in which we should use the default
// color table.
if(ctName == NULL || std::string(ctName) == "Default")
{
// Use the default continuous color table.
const char *dct = ct->GetDefaultContinuousColorTable().c_str();
// No continuous table so use the default discrete color table.
if(dct == 0)
dct = ct->GetDefaultDiscreteColorTable().c_str();
c = ct->GetColors(dct, invert);
}
else if (validName)
{
if(!ct->ColorTableExists(ctName))
{
EXCEPTION1(InvalidColortableException, ctName);
}
// Use the specified color table. It was a valid color table.
c = ct->GetColors(ctName, invert);
}
if(c != NULL)
{
// Set the colors into the lookup table.
if (0 <= rampOpacity && rampOpacity <= 1.0)
{
// Change from 0->1.0 to 0->256
rampOpacity *= 256.0;
unsigned char *a = (unsigned char *) malloc( ct->GetNumColors() );
for( unsigned int i=0; i<ct->GetNumColors(); ++i )
a[i] = (unsigned char)
(rampOpacity * (double) i / (double) ct->GetNumColors() );
SetLUTColorsAndOpacity(c, a, ct->GetNumColors());
}
else if (useOpacities)
{
const unsigned char *a = ct->GetAlphas(ctName);
SetLUTColorsAndOpacity(c, a, ct->GetNumColors());
}
else
{
SetLUTColors(c, ct->GetNumColors());
}
return true;
}
else
return false;
}
