HDK add points, vertices, primitives to SIM_Geometry

[stkeg]

i'm trying to add new points and primitives to an existing geometry in a DOP with the HDK.

this is what I'm doing:

//from the SIM_Object i find the object i want
SIM_Object *sim_obj = objects.findObjectById(obj_id);

const SIM_Geometry* sim_geo = sim_obj->getGeometry();

GU_DetailHandleAutoReadLock gdl(sim_geo->getGeometry());

const GU_Detail *gdp = gdl.getGdp();

gdp->appendPointOffset();

i can't add anything to the gdp. i get errors like this whenever i try (in this example, appendPointOffset):

error: passing ‘const GU_Detail’ as ‘this’ argument of ‘GA_Offset GEO_Detail::appendPointOffset()’ discards qualifiers

i think it might be because i should be using GU_DetailHandleAutoWriteLock instead of the GU_DetailHandleAutoReadLock, but I can't use the Write version. I get an error like this:

error: no matching function for call to ‘GU_DetailHandleAutoWriteLock::GU_DetailHandleAutoWriteLock(GU_ConstDetailHandle)’

any clues as to how i can do this? thanks.

[Guest mantragora]

const GU_Detail*

mean it's locked for modification and you trying to use non cost function on it. All I can say for now without the code.

What you are passing to GU_DetailHandleAutoWriteLock ? Maybe you need to cast it before? It requires

const GU_DetailHandle

and it looks that you are trying to pass

GU_ConstDetailHandle

And it's not exactly the same.

EDIT:

There is a public

GU_ConstDetailHandle::castAwayConst()

method that returns

GU_DetailHandle

Maybe you can cast it later to const and pass to GU_DetailHandleAutoWriteLock ? But I'm sure you can get it before without so many casts.

EDIT2:

You can find example of how to use GU_DetailHandleAutoWriteLock in those three examples in HDK help:

http://www.sidefx.co..._c-example.html

http://www.sidefx.co..._c-example.html

http://www.sidefx.co..._c-example.html

Edited August 15, 2013 by mantragora