Writing attributes problem

[Macha]

I want to write some values into a point attribute. For testing purposes I just use 0.1 on all points.

Why does this code crash Houdini? What is the proper way to do it?

	 GA_RWAttributeRef	 myatt;
	 myatt = gdp->findFloatTuple(GA_ATTRIB_POINT, "myatt",1);
	 if (!myatt.isValid())
	 {
		 myatt = gdp->addFloatTuple(GA_ATTRIB_POINT, "myatt",1);
	 }
	 GA_RWHandleF atthandle(myatt.getAttribute());	
	 for (GA_Iterator it(gdp->getPointRange()); !it.atEnd(); it.advance())
	 {
		 GA_Offset offset = it.getOffset();
		 //tuple->set(myatt.getAttribute(), offset, 0.1, 1);
		 atthandle.set(offset,1.0);
	 }

[/CODE]

Edited November 1, 2013 by Macha

[Macha]

Oohps, that seems to work now.

I guess, the question is then whether this is the good way to do it?

[graham]

Yeah, that's about the right way to do it. If you are trying to set all the values constant you could just do attHandle.makeConstant(1.0) to avoid iteration.

[kgmcnamara]

Is there any way to use setBlock or setBlockFromIndices to avoid iteration if you're not setting all the values the same? Keeps crashing when I try, but I think I'm messing up the offsets.

Edited May 5, 2015 by kgmcnamara

[MrScienceOfficer]

setBlockFromIndices wouldn't segfault as long as the stride and components don't cause overflow.

 

However for setBlock you could defragment the gdp to insure there are holes.

Edited May 6, 2015 by captain