Re: [osg-users] Upside down smoke trail

[Wojciech Lewandowski]

Hi Kevin,

Below is a piece of code that does exactly what you want in global WGS84 
ellipsoid coord space. In your case just replace _xyz  with the direction 
vector you want the smoke to move.


osgParticle::FluidProgram* fp =
 dynamic_castosgParticle::FluidProgram*
 ( _smokeTrailParticleEffect-getProgram() );

if( fp )
{
osg::Vec3 v = _xyz;

if( v.normalize()  0.0 )
   fp-setAcceleration( v * 9.81 );

}

Cheers,
Wojtek Lewandowski

-Original Message- 
From: Kevin Bentley

Sent: Thursday, October 21, 2010 10:35 PM
To: osg-users@lists.openscenegraph.org
Subject: [osg-users] Upside down smoke trail

Hi,

I want to have a particle effect that looks like falling dust/dirt. I was 
thinking of using something like a smoketrail effect (with a different 
texture), but I can't figure out how to make the particles go down instead 
of up.


Amy I on the wrong track here? Any ideas how to best accomplish a falling 
dust/dirt effect?


Thanks,

Kevin

--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=32953#32953





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[osg-users] Upside down smoke trail

[Kevin Bentley]

Hi,

I want to have a particle effect that looks like falling dust/dirt. I was 
thinking of using something like a smoketrail effect (with a different 
texture), but I can't figure out how to make the particles go down instead of 
up. 

Amy I on the wrong track here? Any ideas how to best accomplish a falling 
dust/dirt effect?

Thanks,

Kevin

--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=32953#32953





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