void C_SmokeStack::RenderParticles( CParticleRenderIterator *pIterator )
{
const SmokeStackParticle *pParticle = (const SmokeStackParticle*)pIterator->GetFirst();
while ( pParticle )
{
// Transform.
Vector tPos;
TransformParticle( m_pParticleMgr->GetModelView(), pParticle->m_Pos, tPos );
// Figure out its alpha. Squaring it after it gets halfway through its lifetime
// makes it get translucent and fade out for a longer time.
//float alpha = cosf( -M_PI_F + tLifetime * M_PI_F * 2.f ) * 0.5f + 0.5f;
float tLifetime = pParticle->m_Lifetime * m_InvLifetime;
float alpha = TableCos( -M_PI_F + tLifetime * M_PI_F * 2.f ) * 0.5f + 0.5f;
if( tLifetime > 0.5f )
alpha *= alpha;
m_Renderer.RenderParticle(
pIterator->GetParticleDraw(),
pParticle->m_Pos,
tPos,
alpha * m_flAlphaScale,
FLerp(m_StartSize, m_EndSize, tLifetime),
DEG2RAD( pParticle->m_flAngle )
);
pParticle = (const SmokeStackParticle*)pIterator->GetNext( pParticle->m_flSortPos );
}
}
