RE: [Plib-devel] LookAt

[Dave M. <Dav...@dy...>]

done.

> > Dave McClurg wrote:
> > 
> > I ported gluLookAt to SSG, tested it, and committed the changes
> > 
> > void ssgLookAt ( SGfloat eyex, SGfloat eyey, SGfloat eyez,
> >   SGfloat centerx, SGfloat centery, SGfloat centerz,
> >   SGfloat upx, SGfloat upy, SGfloat upz )
> 
> Good idea - but I have a couple of really minor gripes:
> 
> I think it should be a member function of ssgContext where the other
> camera stuff lives - and rather than slavishly follow the OpenGL
> parameter
> list, we could be a bit more friendly and take three vectors 
> as parameters
> instead of nine floats...something like:
> 
>    void ssgContext::setCameraLookAt ( sgVec3 eye, sgVec3 
> center, sgVec3 up ) ;
> 
> ...then you could still have a non-member function that just works
> on _ssgCurrentContext...
> 
>    void ssgSetCameraLookAt ( sgVec3 eye, sgVec3 center, sgVec3 up ) ;
> 
> ...that would be more in tune with the rest of the package.
> 
> You could also overload it with a version that doesn't need 
> the 'up' parameter
> and just takes it to be (0,0,1) - which is probably good for 
> 99% of applications.
> 
> -- 
> Steve Baker   HomeEmail: <sjb...@ai...>
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