void CTrailParticles::RenderParticles(CParticleRenderIterator *pIterator)
{
const TrailParticle *pParticle = (const TrailParticle*) pIterator->GetFirst();
while (pParticle)
{
//Get our remaining time
float lifePerc = 1.0f - (pParticle->m_flLifetime / pParticle->m_flDieTime);
float scale = (pParticle->m_flLength*lifePerc);
if (scale < 0.01f)
scale = 0.01f;
Vector start, delta;
//NOTE: We need to do everything in screen space
TransformParticle(ParticleMgr()->GetModelView(), pParticle->m_Pos, start);
float sortKey = start.z;
Vector3DMultiply(ParticleMgr()->GetModelView(), pParticle->m_vecVelocity, delta);
float color[4];
float ramp = 1.0;
// Fade in for the first few frames
if (pParticle->m_flLifetime <= 0.3 && m_fFlags & bitsPARTICLE_TRAIL_FADE_IN)
{
ramp = pParticle->m_flLifetime;
}
else if (m_fFlags & bitsPARTICLE_TRAIL_FADE)
{
ramp = (1.0f - (pParticle->m_flLifetime / pParticle->m_flDieTime));
}
color[0] = pParticle->m_color.r * ramp * (1.0f / 255.0f);
color[1] = pParticle->m_color.g * ramp * (1.0f / 255.0f);
color[2] = pParticle->m_color.b * ramp * (1.0f / 255.0f);
color[3] = pParticle->m_color.a * ramp * (1.0f / 255.0f);
float flLength = (pParticle->m_vecVelocity * scale).Length();//( delta - pos ).Length();
float flWidth = (flLength < pParticle->m_flWidth) ? flLength : pParticle->m_flWidth;
//See if we should fade
Vector vecScaledDelta = (delta*scale);
Tracer_Draw(pIterator->GetParticleDraw(), start, vecScaledDelta, flWidth, color);
pParticle = (const TrailParticle*) pIterator->GetNext(sortKey);
}
}
//------------------------------------------------------------------------------
// Purpose :
// Input :
// Output :
//------------------------------------------------------------------------------
bool CPlasmaSpray::SimulateAndRender(Particle *pParticle, ParticleDraw *pDraw, float &sortDist )
{
SimpleParticle* pSimpleParticle = (SimpleParticle*)pParticle;
//Should this particle die?
pSimpleParticle->m_flLifetime += pDraw->GetTimeDelta();
C_PlasmaBeamNode* pNode = (C_PlasmaBeamNode*)((C_BaseEntity*)m_pOwner);
if ( pSimpleParticle->m_flLifetime >= pSimpleParticle->m_flDieTime )
{
return false;
}
// If owner is gone or spray off remove me
else if (pNode == NULL || !pNode->m_bSprayOn)
{
return false;
}
float scale = random->RandomFloat( 0.02, 0.08 );
// NOTE: We need to do everything in screen space
Vector delta;
Vector start;
TransformParticle(g_ParticleMgr.GetModelView(), pSimpleParticle->m_Pos, start);
Vector3DMultiply( CurrentWorldToViewMatrix(), pSimpleParticle->m_vecVelocity, delta );
delta[0] *= scale;
delta[1] *= scale;
delta[2] *= scale;
// See c_tracer.* for this method
Tracer_Draw( pDraw, start, delta, random->RandomInt( 2, 8 ), 0 );
//Simulate the movement with collision
trace_t trace;
float timeDelta = pDraw->GetTimeDelta();
m_ParticleCollision.MoveParticle( pSimpleParticle->m_Pos, pSimpleParticle->m_vecVelocity, NULL, timeDelta, &trace );
return true;
}
//-----------------------------------------------------------------------------
// Purpose: Update state + render
//-----------------------------------------------------------------------------
bool CBasePlasmaProjectile::SimulateAndRender(Particle *pInParticle, ParticleDraw *pDraw, float &sortKey)
{
if ( IsDormantPredictable() )
return true;
if ( GetMoveType() == MOVETYPE_NONE )
return true;
// Update the particle position
pInParticle->m_Pos = GetAbsOrigin();
// Add our blended offset
if ( gpGlobals->curtime < m_Shared.GetSpawnTime() + REMAP_BLEND_TIME )
{
float frac = ( gpGlobals->curtime - m_Shared.GetSpawnTime() ) / REMAP_BLEND_TIME;
frac = 1.0f - clamp( frac, 0.0f, 1.0f );
Vector scaledOffset;
VectorScale( m_vecGunOriginOffset, frac, scaledOffset );
pInParticle->m_Pos += scaledOffset;
}
float timeDelta = pDraw->GetTimeDelta();
// Render the head particle
if ( pInParticle == m_pHeadParticle )
{
SimpleParticle *pParticle = (SimpleParticle *) pInParticle;
pParticle->m_flLifetime += timeDelta;
// Render
Vector tPos, vecOrigin;
RemapPosition( m_pPreviousPositions[MAX_HISTORY-1].m_Position, m_pPreviousPositions[MAX_HISTORY-1].m_Time, vecOrigin );
TransformParticle( ParticleMgr()->GetModelView(), vecOrigin, tPos );
sortKey = (int) tPos.z;
//Render it
RenderParticle_ColorSizeAngle(
pDraw,
tPos,
UpdateColor( pParticle, timeDelta ),
UpdateAlpha( pParticle, timeDelta ) * GetAlphaDistanceFade( tPos, 16, 64 ),
UpdateScale( pParticle, timeDelta ),
UpdateRoll( pParticle, timeDelta ) );
/*
if ( m_flNextSparkEffect < gpGlobals->curtime )
{
// Drop sparks?
if ( GetTeamNumber() == TEAM_HUMANS )
{
g_pEffects->Sparks( pInParticle->m_Pos, 1, 3 );
}
else
{
g_pEffects->EnergySplash( pInParticle->m_Pos, vec3_origin );
}
m_flNextSparkEffect = gpGlobals->curtime + RandomFloat( 0.5, 2 );
}
*/
return true;
}
// Render the trail
TrailParticle *pParticle = (TrailParticle *) pInParticle;
pParticle->m_flLifetime += timeDelta;
Vector vecScreenStart, vecScreenDelta;
sortKey = pParticle->m_Pos.z;
// NOTE: We need to do everything in screen space
float flFragmentLength = (MAX_HISTORY > 1) ? 1.0 / (float)(MAX_HISTORY-1) : 1.0;
for ( int i = 0; i < (MAX_HISTORY-1); i++ )
{
Vector vecWorldStart, vecWorldEnd, vecScreenEnd;
float flStartV, flEndV;
// Did we just appear?
if ( m_pPreviousPositions[i].m_Time == 0 )
continue;
RemapPosition( m_pPreviousPositions[i+1].m_Position, m_pPreviousPositions[i+1].m_Time, vecWorldStart );
RemapPosition( m_pPreviousPositions[i].m_Position, m_pPreviousPositions[i].m_Time, vecWorldEnd );
// Texture wrapping
flStartV = (flFragmentLength * (i+1));
flEndV = (flFragmentLength * i);
TransformParticle( ParticleMgr()->GetModelView(), vecWorldStart, vecScreenStart );
TransformParticle( ParticleMgr()->GetModelView(), vecWorldEnd, vecScreenEnd );
Vector vecScreenDelta = (vecScreenEnd - vecScreenStart);
if ( vecScreenDelta == vec3_origin )
continue;
/*
Vector vecForward, vecRight;
AngleVectors( MainViewAngles(), &vecForward, &vecRight, NULL );
Vector vecWorldDelta = ( vecWorldEnd - vecWorldStart );
VectorNormalize( vecWorldDelta );
float flDot = fabs(DotProduct( vecWorldDelta, vecForward ));
if ( flDot > 0.99 )
{
// Remap alpha
pParticle->m_flColor[3] = 1.0 - min( 1.0, RemapVal( flDot, 0.99, 1.0, 0, 1 ) );
}
*/
// See if we should fade
float color[4];
Color32ToFloat4( color, pParticle->m_color );
Tracer_Draw( pDraw, vecScreenStart, vecScreenDelta, pParticle->m_flWidth, color, flStartV, flEndV );
}
return true;
}
