Leftover in constructor or ...

[Guest mantragora]

... is there some deeper story behind this?

 

GUI_PolySoupBox(const GR_RenderInfo *info, const char *cache_name, const GEO_Primitive *prim);

and then

GUI_PolySoupBox::GUI_PolySoupBox(const GR_RenderInfo *info, const char *cache_name, const GEO_Primitive *prim)
: GR_Primitive(info, cache_name, GA_PrimCompat::TypeMask(0))

?

Still not ticking? Lets continue

GR_Primitive constructor takes

(const GR_RenderInfo* info, const char* cachename, GEO_PrimTypeCompat::TypeMask primitivetype)

GUI_PolySoupBox last argument is

const GEO_Primitive *prim

and we are setting GR_Primitive last argument as

GA_PrimCompat::TypeMask(0)

I don't see const GEO_Primitive *prim being used anywhere, but I could miss something, so what's the point?

Maybe the point of this is to make something like

return new GUI_PolySoupBox(info, cache_name, GA_PrimCompat::TypeMask(prim->getTypeId().get()));

instead of

return new GUI_PolySoupBox(info, cache_name, prim);

?

Every GUI example in HDK docs have this.

Thanks!

BTW:

What is this GA_PrimCompat::TypeMask? Is there some enum anywhere with values for this that I can use?

BTW2:

Looking at GUI_PolySoupBoxHook::createPrimitive(), there is a check for type of the GEO primitive, then we create new GUI_PolySoupBox() so it would be logical to set GA_PrimCompat::TypeMask instead of passing const GEO_Primitive.

Edited November 23, 2014 by mantragora

[Guest mantragora]

In other words:

Do I have to pass const GEO_Primitive *prim in constructor of my custom GR_Primitive?

GR_Primitive itself doesn't require it so why I would like to do that in my custom GR_Primitive?

To accomplish what?

[Syrux]

What I found:

 

GA_PrimCompat::TypeMask(0) is to primitives

 

as

 

GA_PointGroup is to points

 

 

 

TypeMask(0) filters primitives which match the type mask specified.

 

When you selected (0), Houdini takes all the primitives. It is not necessary, that's way you can omit the argument, it works in the same way when you don't define point groups (check that zero) in gdp->getPointBBox(&bbox, 0); and Houdini takes all the points. "GA_PrimCompat::TypeMask(0)" can also be used as mask to iterate the defined groups of primitives in iterators, check this http://www.sidefx.com/docs/hdk13.0/_g_a___g_b_macros_8h.html#accfa36a011faa15dad3800e6ce2320eb

[Guest mantragora]

What I found:

 

GA_PrimCompat::TypeMask(0) is to primitives

 

as

 

GA_PointGroup is to points

 

 

 

TypeMask(0) filters primitives which match the type mask specified.

 

When you selected (0), Houdini takes all the primitives. It is not necessary, that's way you can omit the argument, it works in the same way when you don't define point groups (check that zero) in gdp->getPointBBox(&bbox, 0); and Houdini takes all the points. "GA_PrimCompat::TypeMask(0)" can also be used as mask to iterate the defined groups of primitives in iterators, check this http://www.sidefx.com/docs/hdk13.0/_g_a___g_b_macros_8h.html#accfa36a011faa15dad3800e6ce2320eb

 

That's why I asked, maybe there should be

GA_PrimCompat::TypeMask(prim->getTypeId().get())

and that's why we would like to pass const GEO_Primitive *prim in  in custom GR_Primitive.