Hey list,
also posted this on the steam forum
In my HL2MP Ep1 mod I'm maually creating particles using a derived class
from the original hl2 explosion, the explosion I'm currently working on
only has a particle effect based on the fire_embers released after an
explosion.
Everything's good about it except the moving speed I've tried a bunch of
thing but can't seem to decrease the speed at which they float away from
the explosion, normally this wouldn't be so important due to the short
life span of the particles, but mine have a much higher lifetime (or
dietime if you wanna kill it that)
Here's the code I'm using:
if ( m_fFlags & TE_EXPLFLAG_NOFIREBALL )
return;
Vector offset;
//Spread constricts as force rises
float force = m_flForce;
//Cap our force
if ( force < EXPLOSION_FORCE_MIN )
force = 0.5f;
if ( force > EXPLOSION_FORCE_MAX )
force = 0.5f;
float spread = 1.0f - ( 0.15f * force );
SimpleParticle *pParticle;
CSmartPtr<CExplosionParticle> pSimple = CExplosionParticle::Create(
"exp_smoke" );
pSimple->SetSortOrigin( m_vecOrigin );
pSimple->SetNearClip( 64, 128 );
pSimple->GetBinding().SetBBox( m_vecOrigin - Vector( 128, 128, 128
), m_vecOrigin + Vector( 128, 128, 128 ) );
//FIXME: Better sampling area
offset = m_vecOrigin + ( m_vecDirection * 10.0f );
//Find area ambient light color and use it to tint smoke
Vector worldLight = WorldGetLightForPoint( offset, true );
Vector tint;
float luminosity;
if ( worldLight == vec3_origin )
{
tint = vec3_origin;
luminosity = 0.0f;
}
else
UTIL_GetNormalizedColorTintAndLuminosity( worldLight, &tint,
&luminosity );
// We only take a portion of the tint
tint = (tint * 0.25f)+(Vector(0.75f,0.75f,0.75f));
//
// Embers
//
if ( m_Material_Embers[0] == NULL )
m_Material_Embers[0] = pSimple->GetPMaterial(
"effects/holyn_particle1" );
if ( m_Material_Embers[1] == NULL )
m_Material_Embers[1] = pSimple->GetPMaterial(
"effects/holyn_particle2" );
for ( int i = 0; i < 50; i++ )
{
offset.Random( -3.0f, 3.0f );
offset += m_vecOrigin;
pParticle = (SimpleParticle *) pSimple->AddParticle( sizeof(
SimpleParticle ), m_Material_Embers[random->RandomInt(0,1)], offset );
if ( pParticle != NULL )
{
pParticle->m_flLifetime = 0.0f;
pParticle->m_flDieTime = random->RandomFloat( 17.5f, 20.0f );
pParticle->m_vecVelocity.Random( -spread*4, spread*4 );
pParticle->m_vecVelocity += m_vecDirection / 6;
VectorNormalize( pParticle->m_vecVelocity );
float fForce = 1.0f;
//Scale the force down as we fall away from our main direction
float vDev = ScaleForceByDeviation(
pParticle->m_vecVelocity, m_vecDirection, spread );
pParticle->m_vecVelocity *= fForce * ( 0.75f *
(vDev*vDev*0.15f) / 6 );
#if __EXPLOSION_DEBUG
debugoverlay->AddLineOverlay( m_vecOrigin, m_vecOrigin +
pParticle->m_vecVelocity, 255, 0, 0, false, 3 );
#endif
pParticle->m_uchColor[0] = 255;
pParticle->m_uchColor[1] = 255;
pParticle->m_uchColor[2] = 255;
pParticle->m_uchStartSize = random->RandomInt( 2, 3 );
//pParticle->m_uchStartSize = clamp(
pParticle->m_uchStartSize, 4, 32 );
pParticle->m_uchEndSize = 1;
pParticle->m_uchStartAlpha = 80;
pParticle->m_uchEndAlpha = 0;
pParticle->m_flRoll = random->RandomInt( 0, 360 );
pParticle->m_flRollDelta = random->RandomFloat( -3.0f,
3.0f );
}
}
And also a picture of how it currently looks like:
http://i65.photobucket.com/albums/h208/InfernoNL/fo_complex0000-1.jpg
I kinda wanna decrease the speed that much that by the time the
particles have moved that far they would have almost faded already.
I've messed with force, spread, velocity and more, the speed seems to
remain unaltered.
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