float GlowSightDistance( const Vector &glowOrigin, bool bShouldTrace )
{
float dist = (glowOrigin - CurrentViewOrigin()).Length();
C_BasePlayer *local = C_BasePlayer::GetLocalPlayer();
if ( local )
{
dist *= local->GetFOVDistanceAdjustFactor();
}
if ( bShouldTrace )
{
Vector end = glowOrigin;
// HACKHACK: trace 4" from destination in case the glow is inside some parent object
// allow a little error...
if ( dist > 4 )
{
end -= CurrentViewForward()*4;
}
int traceFlags = MASK_OPAQUE|CONTENTS_MONSTER|CONTENTS_DEBRIS;
CTraceFilterGlow filter(NULL, COLLISION_GROUP_NONE);
trace_t tr;
UTIL_TraceLine( CurrentViewOrigin(), end, traceFlags, &filter, &tr );
if ( tr.fraction != 1.0f )
return -1;
}
return dist;
}
float C_FuncAreaPortalWindow::GetDistanceBlend()
{
// Get the viewer's distance to us.
float flDist = CollisionProp()->CalcDistanceFromPoint( CurrentViewOrigin() );
C_BasePlayer *local = C_BasePlayer::GetLocalPlayer();
if ( local )
{
flDist *= local->GetFOVDistanceAdjustFactor();
}
float flAlpha = RemapVal( flDist, m_flFadeStartDist, m_flFadeDist, m_flTranslucencyLimit, 1 );
flAlpha = clamp( flAlpha, m_flTranslucencyLimit, 1 );
return flAlpha;
}
//-----------------------------------------------------------------------------
// Compute distance fade
//-----------------------------------------------------------------------------
static unsigned char ComputeDistanceFade( C_BaseEntity *pEntity, float flMinDist, float flMaxDist )
{
if ((flMinDist <= 0) && (flMaxDist <= 0))
return 255;
if( flMinDist > flMaxDist )
{
swap( flMinDist, flMaxDist );
}
// If a negative value is provided for the min fade distance, then base it off the max.
if( flMinDist < 0 )
{
flMinDist = flMaxDist - 400;
if( flMinDist < 0 )
{
flMinDist = 0;
}
}
flMinDist *= flMinDist;
flMaxDist *= flMaxDist;
float flCurrentDistanceSq = CurrentViewOrigin().DistToSqr( pEntity->WorldSpaceCenter() );
C_BasePlayer *pLocal = C_BasePlayer::GetLocalPlayer();
if ( pLocal )
{
float flDistFactor = pLocal->GetFOVDistanceAdjustFactor();
flCurrentDistanceSq *= flDistFactor * flDistFactor;
}
// If I'm inside the minimum range than don't resort to alpha trickery
if ( flCurrentDistanceSq <= flMinDist )
return 255;
if ( flCurrentDistanceSq >= flMaxDist )
return 0;
// NOTE: Because of the if-checks above, flMinDist != flMinDist here
float flFalloffFactor = 255.0f / (flMaxDist - flMinDist);
int nAlpha = flFalloffFactor * (flMaxDist - flCurrentDistanceSq);
return clamp( nAlpha, 0, 255 );
}