how to get and set the attribute value of a certain point?

[helium]

Hello Everyone,

I'm working on some HDK stuff and hope someone here could give me some hint. How to get and set the attribute value of a certain point(e.g. point 4)?

Thanks in advance.

[Vormav]

int fooOffset = gdp->findPointAttrib("foo", sizeof(float), GB_ATTRIB_FLOAT);
if(fooOffset >= 0)
   *(gdp->points()(4)->castAttribData<float>(fooOffset)) = 27;

[helium]

Thanks Vormav!

int fooOffset = gdp->findPointAttrib("foo", sizeof(float), GB_ATTRIB_FLOAT);
if(fooOffset >= 0)
   *(gdp->points()(4)->castAttribData<float>(fooOffset)) = 27;

[helium]

One more question, what if I don't know the attribute type in advance? For example, I could only use the getType() to get the type, but I don't know if it's float or int.

I can't use

 
*(gdp->points()(4)->castAttribData<myType> (fooOffset)) = 27;

Could anyone here let me know how to handle the type information?

Thanks,

[Vormav]

The problem is that you're allowed to have attributes of the same name but different types, so you may want to just search for them.

UT_String attrName;
for(GB_Attribute* attr = gdp->pointAttribs().getHead(); attr; attr = dynamic_cast<GB_Attribute*>(attr->next()))
{
   if(attr->getName() == attrName)
   {
       const int thisOffset = gdp->findPointAttrib(attr);
       switch(attr->getType)
       {
        ...
       };
   }
}

Edited July 6, 2010 by Vormav