Re: pfHighlight

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Angus Dorbie (dorbie++at++sgi.com)
Tue, 17 Mar 1998 13:17:01 -0800

Liu Xiaoyan wrote:
>
> Hi, thanks for your help. Unfortunately, it doesn't work for me.
> Referring to your suggestion on my programming, I think it is better
> for me to describe briefly what I'm doing.
>
> I'm subclassing a class from pfDCS with intersection detection as
> well. All these "getInto and goOut" and intersection code are called
> from the "grabDCS::app(trav)" function.I understand that this may
> not be a good way in Performer. But the pguide says it impossible
> now to overload libpf's intersection or cull traversals. Or shall I
> overload the "draw" functioin?

No, you use the constructor to add draw traversal callbacks.
  
>
> In fact, I'm programming this for a CAVE application. So it is a
> multiprocess program and all the initialization are done by the library.
>
> > > I just ran into a problem of pfHighlight, it doesn't work at all.
> > > What I'm trying to do is to HighLight an object when the mouse is
> > > inside its bounding box. It's coded inside a C++ class. I'm using
> > > Performer 2.1 on Onyx2IR ( 2 graphics pipes).
> void grabDCS::getInto(void)
> {
> if (!inside) {
> printf("\n IN INININNNN*********"); // true
>
> pfHighlight *hl;
> hl = new pfHighlight;
> pfEnable(PFEN_HIGHLIGHTING);
> pfOverride(PFSTATE_ENHIGHLIGHTING | PFSTATE_HIGHLIGHT,PF_ON);
> hl->setMode(PFHL_BBOX_LINES);
> //hl->setMode(PFHL_LINES | PFHL_LINESPAT);
> hl->setColor(PFHL_FGCOLOR, 1.0f, 0.0f, 0.0f);
> hl->setColor(PFHL_BGCOLOR, 1.0f, 0.0f, 0.0f);
> hl->apply();
> }
> }
> > > void grabDCS::goOut(void) // remove highlight when mouse is outside
> > > { pfDisable(PFEN_HIGHLIGHTING);
> > > }
>
> > Your geostate information probably doesn't have highlighting
> > enabled so you need to override highlight state on after you
> > enable in the pre draw then turn override off in the post draw
> > callback.
> >
> > Also your methods look like application level code which is
> > legal if you are running single threaded but very wrong if
> > you run multiprocessed asumming you are using libpf not libpr
> > and aren't calling these in and out methods from draw callbacks.
> > You need to use draw callbacks if you aren't already.
>
> I'm relatively new to Performer and have some questions about the basics
> of it.
> 1. What's the relationship between pfPipe and hardware pipeline? For a
> performer application, which part of work is done in the hardware
> pipe?
> What if I specify more than hw pipes in a program?
> 2. How to compile sample programs? I got the following message all the
> time:
> Is there any dependency between the "Makefiles" under each directory?
>
> making OpenGL DSO version of fillstats.ogldso
> /usr/bin/cc -nostdinc -I/usr/include -mips2 -o32 -O -Olimit
> 2000 -MDupdate Makedepend -woff
> 1685,515,608,658,799,803,852,1048,1233,1499 -o fillstats.dsocmd
> fillstats.o -L/usr/lib -L/usr/lib/libpfdb -L/lib
> -all -lpf_ogl -lmpc -limage -
> ld: WARNING 134: weak definition of __ct__6pfVec3Fv in fillstats.o
> preempts that weak definition in
> /usr/lib/libpf_ogl.so.
> ld: WARNING 134: weak definition of __ct__6pfVec4Fv in fillstats.o
> preempts that weak definition in
> /usr/lib/libpf_ogl.so.
> ld: FATAL 9: I/O error (-lGLw): No such file or directory
> *** Error code 1
> smake: Error: 1 error
> *** Error code 2
> smake: Error: 1 error

Just remove the -lGLw library link.

>
> 3. When I run the "fog" sample, the window pops up and dies as:
> PF Debug/Resource: pfInitGfx() - Window "fog" has 23 bits
> of depth buffer.
> PF Debug/Resource: pfInitGfx() - Window "fog" has 1 bits
> of stencil.
> PF Debug/Resource: pfInitGfx() - Window "fog" has
> multisample context with 8 samples.
> PF Notice: Radius: 0.649295
> PF Notice: Caught SIGCHLD. Exiting due to death
> of child with pid 10878.
> What's the possibel cause?

Just recompile this demo.

Cheers,Angus.

-- 
"Only the mediocre are always at their best." -- Jean Giraudoux 


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