Re: Particle System

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Angus Dorbie (dorbie++at++sgi.com)
Fri, 26 Nov 1999 04:27:28 -0800

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Angus Dorbie wrote:
>
> Geoff Levner wrote:
> >
>
> > ...... But if you are just drawing points, I don't imagine there is
> > much to optimize.
>
> :-)
>
> Famous last words.
>
> I could say the same for triangles. You'd be surprised how many people
> when drawing points do something slow like:
>
> glBegin(GL_POINTS);
> for(i = 0; i<numpoints; i++) glVertex3fv(particle_array[i*3]);

oops:

glVertex3fv(&(particle_array[i*3]));

or:

glVertex3fv(particle_array+(i*3));

> glEnd();

Cheers,Angus.

-- "Success is the ability to go from one failure to another with no loss of enthusiasm." - Winston Churchill.

Performer + OpenGL examples and tutors: http://www.dorbie.com/

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