plib-users

[Plib-users] Vertex lists

[vampman <va...@gt...>]

How can get access to the vertex list from a ssgEntity?

RE: [Plib-users] Vertex lists

[Norman V. <nh...@ca...>]

vampman writes:
>
>How can get access to the vertex list from a ssgEntity?
>

ssgEntity *entity;

if (entity->isAKindOf(ssgTypeLeaf()))
{
    float *vertexList = ((ssgLeaf)entity)->getVertex(0);
}

You probably would be better off testing for ssgTypeVtxTable() ect
but you should see the idea :)

Norman

Re: [Plib-users] Vertex lists

[Steve B. <sjb...@ai...>]

Norman Vine wrote:
> 
> vampman writes:
> >
> >How can get access to the vertex list from a ssgEntity?
> >
> 
> ssgEntity *entity;
> 
> if (entity->isAKindOf(ssgTypeLeaf()))
> {
>     float *vertexList = ((ssgLeaf)entity)->getVertex(0);
> }
> 
> You probably would be better off testing for ssgTypeVtxTable() ect
> but you should see the idea :)

Just to clarify, you really can't get a vertex list from an ssgEntity,
some ssgEntities are not geometric objects at all.

The most obvious example of an ssgEntity that doesn't have a vertex
list is an ssgBranch - but I've been thinking of creating a node type
that uses OpenAL to do spatialised 3D audio in an SSG scene graph for
example.

First you have to have an ssgLeaf of some kind.  Norman's code
(above) checks that first - which is good.

-- 
Steve Baker                  http://web2.airmail.net/sjbaker1
sjb...@ai... (home)  http://www.woodsoup.org/~sbaker
sj...@ht...      (work)

Re: [Plib-users] Vertex lists

[<Va...@t-...>]

Steve Baker wrote:
> 
> The most obvious example of an ssgEntity that doesn't have a vertex
> list is an ssgBranch - but I've been thinking of creating a node type
> that uses OpenAL to do spatialised 3D audio in an SSG scene graph for
> example.

As you are mentioning OpenAL: What's the relation between OpenAL and SL?

Wasn't it that the OpenAL people were only discussing and not
programming so that Steve decided to write his own lib? But I might be
totally wrong about this...

CU,
Christian

Re: [Plib-users] Vertex lists

[David W. <wri...@vt...>]

I saw just recently that loki has been working on it and they have released
at least a preliminary implementation.Check it out at www.openal.org

David Wrighton

----- Original Message -----
From: "Christian Mayer" <Va...@t-...>
To: <pli...@li...>
Sent: Friday, March 24, 2000 4:20 PM
Subject: Re: [Plib-users] Vertex lists


> Steve Baker wrote:
> >
> > The most obvious example of an ssgEntity that doesn't have a vertex
> > list is an ssgBranch - but I've been thinking of creating a node type
> > that uses OpenAL to do spatialised 3D audio in an SSG scene graph for
> > example.
>
> As you are mentioning OpenAL: What's the relation between OpenAL and SL?
>
> Wasn't it that the OpenAL people were only discussing and not
> programming so that Steve decided to write his own lib? But I might be
> totally wrong about this...
>
> CU,
> Christian
>
>
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