Marcin Romaszewicz (marcin++at++asmodean.engr.sgi.com)
Fri, 16 Jul 1999 10:19:44 -0700 (PDT)
pfNode::pfNode(pfBuffer *buf) is a good choice.
For the parameter, you can pass in the variable _pfCurrentBuffer, which is
defined in pf.h.
-- Marcin
>
> Charlie Curry wrote:
> >
> > I'm just a newbie, but I think the problem is that you are not
> > initializing the superclass, pfNode. As they taught me when I learned
> > Java, the first line of your constructor should always be super(/*blah*/);
> > This is the equivalent of
> >
> > pfSoundSource::pfSoundSource() : pfNode(/*blah*/)
> > {
> > /* more stuff */
> > }
> >
> > Check out the documentation for pfNode, and you'll see that IT has no
> > default constructor. If you just write...
> >
> > pfSoundSource::pfSoundSource()
> > {
> >
> > It implies...
> >
> > pfSoundSource::pfSoundSource() : pfNode()
> > {
> >
> > but that call does not exist.
>
> Yes, thanks I also came to realize that too. The trouble is it isn't
> helping me. Does any C++ expert out there know the right C++ trick to
> get it to work? I've tried adding my own empty pfNode constructor but it
> won't compile. The workaround for now is to subclass pfGroup which works
> OK but wasn't what I wanted.
>
> > Good luck,
> > Charlie Curry
> >
> > On Thu, 15 Jul 1999, Simon Mills wrote:
> >
> > > Hi,
> > >
> > > I'm trying to subclass pfNode to make my own (sound) pfNode type. It
> > > works if I subclass a pfGroup but I'm having trouble compiling if I use
> > > pfNode. The error I get is:
> > >
> > > "../pfSoundSource.c++", line 27: error(1264): no default constructor
> > > exists
> > > for class "pfNode"
> > > {
> > >
> > > ... and this is the relevant code parts:
> > >
> > > ----- pfSoundSource.c++ ------
> > >
> > > #include <Performer/pf/pfNode.h>
> > > #include <Performer/pr/pfMemory.h>
> > > #include <Performer/pr/pfLinMath.h>
> > > #include <Performer/pf/pfTraverser.h>
> > > #include "pfSoundSource.h"
> > >
> > >
> > > pfType *pfSoundSource::classType = NULL;
> > >
> > >
> > > void
> > > pfSoundSource::init() /* Define class type */
> > > {
> > > if (classType == NULL) {
> > > pfNode::init();
> > > classType = new pfType(pfNode::getClassType(), "pfSoundSource");
> > > }
> > > }
> > >
> > >
> > > pfSoundSource::pfSoundSource(char *fName) // Constructor with loading
> > > {
> > > pfMemory::setType(classType);
> > >
> > > /* Initialise properties */
> > > ...
> > > }
> > >
> > > ---- end pfSoundSource.c++ -----
> > >
> > > ---- pfSoundSource.h ----
> > >
> > > class pfSoundSource : public pfNode
> > > {
> > > private:
> > > static pfType *classType;
> > >
> > > private:
> > > ...
> > >
> > > public: /* constructor/destructor */
> > > pfSoundSource(); // without loading (default)
> > > pfSoundSource(char *fName); // with loading
> > > ~pfSoundSource(void);
> > >
> > > public: /* type */
> > > static void init();
> > > static pfType *getClassType() { return classType; }
> > >
> > > }
> > >
> > > ---- end pfSoundSource.h ----
> > >
> > >
> > > Does anyone know what I'm doing wrong or recognise this problem? I've
> > > followed the recommendations in the Performer Programming Guide but I
> > > guess I'm missing something because pfNode is only a container class.
> > >
>
> Help!
> Simon
> ________________________________________________________________________
>
> Simon C. Mills
> Modelling & Simulation Section (TOS-EMM) Tel: +31 (0)71 565 3725
> European Space Agency (ESA/ESTEC) Fax: +31 (0)71 565 5419
> Postbus 299, 2200AG Noordwijk e-mail: simon++at++wgs.estec.esa.nl
> The Netherlands http://www.estec.esa.nl/wmwww/EMM
> ________________________________________________________________________
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