From billconan at gmail.com  Mon Jan 28 20:49:37 2008
From: billconan at gmail.com (Bill Conan)
Date: Mon, 28 Jan 2008 17:49:37 -0800
Subject: [Pbrt-discuss] help! plugin problem.
Message-ID: <555ee1790801281749u7ba230cai79285b1f52fd28fe@mail.gmail.com>

hello guys,

i wrote a accelerator plugin for pbrt. the code was modified directly
from grid.cpp, however weird problem happened when i tried to run it.

this is the problematic part:

extern "C" DLLEXPORT Primitive *CreateAccelerator(const
vector<Reference<Primitive> > &prims,const ParamSet &ps)
{
	printf("%d",prims.size());
	if(!prims[0]) printf("kkkkk");
	return new GridTreeAccel(prims);
}

i tried to render areapot.pbrt
the prims.size() is 105, however prims[0] is NULL, i will get access violation.

why does this happen? i can't see any difference with grid.cpp.

thank you.

From dneilson at cs.ualberta.ca  Mon Jan 28 22:03:48 2008
From: dneilson at cs.ualberta.ca (Daniel Neilson)
Date: Mon, 28 Jan 2008 21:03:48 -0600
Subject: [Pbrt-discuss] help! plugin problem.
In-Reply-To: <555ee1790801281749u7ba230cai79285b1f52fd28fe@mail.gmail.com>
References: <555ee1790801281749u7ba230cai79285b1f52fd28fe@mail.gmail.com>
Message-ID: <479E9794.3070109@cs.ualberta.ca>


  This may seem like an odd question but, did you try inserting the same 
printf()'s into grid.cpp to see whether they return the same results if 
you use a grid rather than your own plugin? It's been forever since I 
tried to do any pbrt coding so, I don't remember whether what you're 
seeing is "normal".

-Daniel


Bill Conan wrote:
> hello guys,
> 
> i wrote a accelerator plugin for pbrt. the code was modified directly
> from grid.cpp, however weird problem happened when i tried to run it.
> 
> this is the problematic part:
> 
> extern "C" DLLEXPORT Primitive *CreateAccelerator(const
> vector<Reference<Primitive> > &prims,const ParamSet &ps)
> {
> 	printf("%d",prims.size());
> 	if(!prims[0]) printf("kkkkk");
> 	return new GridTreeAccel(prims);
> }
> 
> i tried to render areapot.pbrt
> the prims.size() is 105, however prims[0] is NULL, i will get access violation.
> 
> why does this happen? i can't see any difference with grid.cpp.
> 
> thank you.
> _______________________________________________
> pbrt-discuss mailing list
> pbrt-discuss at pbrt.org
> http://six.pairlist.net/mailman/listinfo/pbrt-discuss

-- 
Daniel Neilson         |  "As far as the laws of mathematics refer to
dneilson at cs.ualberta.ca| reality, they are not certain; and as far as
PhD Candidate          | they are certain, they do not refer to reality"
M.Sc, B.C.Sc(Hon)      |         -Albert Einstein


From billconan at gmail.com  Mon Jan 28 22:36:18 2008
From: billconan at gmail.com (Bill Conan)
Date: Mon, 28 Jan 2008 19:36:18 -0800
Subject: [Pbrt-discuss] help! plugin problem.
In-Reply-To: <479E9794.3070109@cs.ualberta.ca>
References: <555ee1790801281749u7ba230cai79285b1f52fd28fe@mail.gmail.com>
	<479E9794.3070109@cs.ualberta.ca>
Message-ID: <555ee1790801281936k5cc72436sfa314b36d499f1bc@mail.gmail.com>

hi, thank you,

i solved the problem. the problematic part is somewhere else. but i
don't know why i got this weird error message.

i don't like plugin architecture. it's hard to debug sometime.

thank you.

On Jan 28, 2008 7:03 PM, Daniel Neilson <dneilson at cs.ualberta.ca> wrote:
>
>   This may seem like an odd question but, did you try inserting the same
> printf()'s into grid.cpp to see whether they return the same results if
> you use a grid rather than your own plugin? It's been forever since I
> tried to do any pbrt coding so, I don't remember whether what you're
> seeing is "normal".
>
> -Daniel
>
>
>
> Bill Conan wrote:
> > hello guys,
> >
> > i wrote a accelerator plugin for pbrt. the code was modified directly
> > from grid.cpp, however weird problem happened when i tried to run it.
> >
> > this is the problematic part:
> >
> > extern "C" DLLEXPORT Primitive *CreateAccelerator(const
> > vector<Reference<Primitive> > &prims,const ParamSet &ps)
> > {
> >       printf("%d",prims.size());
> >       if(!prims[0]) printf("kkkkk");
> >       return new GridTreeAccel(prims);
> > }
> >
> > i tried to render areapot.pbrt
> > the prims.size() is 105, however prims[0] is NULL, i will get access violation.
> >
> > why does this happen? i can't see any difference with grid.cpp.
> >
> > thank you.
> > _______________________________________________
> > pbrt-discuss mailing list
> > pbrt-discuss at pbrt.org
> > http://six.pairlist.net/mailman/listinfo/pbrt-discuss
>
> --
> Daniel Neilson         |  "As far as the laws of mathematics refer to
> dneilson at cs.ualberta.ca| reality, they are not certain; and as far as
> PhD Candidate          | they are certain, they do not refer to reality"
> M.Sc, B.C.Sc(Hon)      |         -Albert Einstein
>
> _______________________________________________
> pbrt-discuss mailing list
> pbrt-discuss at pbrt.org
> http://six.pairlist.net/mailman/listinfo/pbrt-discuss
>