source-engine/game/client/hl2/c_env_starfield.cpp

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2020-04-22 16:56:21 +00:00
//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
// $NoKeywords: $
//=============================================================================//
#include "cbase.h"
#include "engine/IEngineTrace.h"
#include "fx_sparks.h"
#include "particles_ez.h"
#include "view.h"
// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"
ConVar cl_starfield_diameter( "cl_starfield_diameter", "128.0", FCVAR_NONE );
ConVar cl_starfield_distance( "cl_starfield_distance", "256.0", FCVAR_NONE );
//-----------------------------------------------------------------------------
// Purpose:
//-----------------------------------------------------------------------------
class C_EnvStarfield : public C_BaseEntity
{
DECLARE_CLASS( C_EnvStarfield, C_BaseEntity );
public:
DECLARE_CLIENTCLASS();
C_EnvStarfield();
virtual void OnDataChanged( DataUpdateType_t updateType );
virtual void ClientThink( void );
private:
// Emitter
CSmartPtr<CTrailParticles> m_pEmitter;
bool m_bOn;
float m_flDensity;
float m_flNumParticles;
private:
C_EnvStarfield( const C_EnvStarfield & );
};
IMPLEMENT_CLIENTCLASS_DT( C_EnvStarfield, DT_EnvStarfield, CEnvStarfield )
RecvPropInt( RECVINFO(m_bOn) ),
RecvPropFloat( RECVINFO(m_flDensity) ),
END_RECV_TABLE()
// ------------------------------------------------------------------------- //
// C_EnvStarfield
// ------------------------------------------------------------------------- //
C_EnvStarfield::C_EnvStarfield()
{
m_bOn = false;
m_flDensity = 1.0;
m_flNumParticles = 0;
}
//-----------------------------------------------------------------------------
// Purpose:
// Input : updateType -
//-----------------------------------------------------------------------------
void C_EnvStarfield::OnDataChanged( DataUpdateType_t updateType )
{
if ( updateType == DATA_UPDATE_CREATED )
{
m_pEmitter = CTrailParticles::Create( "EnvStarfield" );
Vector vecCenter = MainViewOrigin() + (MainViewForward() * cl_starfield_distance.GetFloat() );
m_pEmitter->Setup( (Vector &) vecCenter,
NULL,
0.0,
0,
64,
0,
0,
bitsPARTICLE_TRAIL_VELOCITY_DAMPEN | bitsPARTICLE_TRAIL_FADE | bitsPARTICLE_TRAIL_FADE_IN );
// Start thinking
SetNextClientThink( CLIENT_THINK_ALWAYS );
}
BaseClass::OnDataChanged( updateType );
}
//-----------------------------------------------------------------------------
// Purpose:
//-----------------------------------------------------------------------------
void C_EnvStarfield::ClientThink( void )
{
if ( !m_bOn || !m_flDensity )
return;
PMaterialHandle hParticleMaterial = m_pEmitter->GetPMaterial( "effects/spark_noz" );
// Find a start & end point for the particle
// Start particles straight ahead of the client
Vector vecViewOrigin = MainViewOrigin();
// Determine the number of particles
m_flNumParticles += 1.0 * (m_flDensity);
int iNumParticles = floor(m_flNumParticles);
m_flNumParticles -= iNumParticles;
// Add particles
for ( int i = 0; i < iNumParticles; i++ )
{
float flDiameter = cl_starfield_diameter.GetFloat();
Vector vecStart = vecViewOrigin + (MainViewForward() * cl_starfield_distance.GetFloat() );
Vector vecEnd = vecViewOrigin + (MainViewRight() * RandomFloat(-flDiameter,flDiameter)) + (MainViewUp() * RandomFloat(-flDiameter,flDiameter));
Vector vecDir = (vecEnd - vecStart);
float flDistance = VectorNormalize( vecDir );
float flTravelTime = 2.0;
// Start a random amount along the path
vecStart += vecDir * ( RandomFloat(0.1,0.3) * flDistance );
TrailParticle *pParticle = (TrailParticle *) m_pEmitter->AddParticle( sizeof(TrailParticle), hParticleMaterial, vecStart );
if ( pParticle )
{
pParticle->m_vecVelocity = vecDir * (flDistance / flTravelTime);
pParticle->m_flDieTime = flTravelTime;
pParticle->m_flLifetime = 0;
pParticle->m_flWidth = RandomFloat( 1, 3 );
pParticle->m_flLength = RandomFloat( 0.05, 0.4 );
pParticle->m_color.r = 255;
pParticle->m_color.g = 255;
pParticle->m_color.b = 255;
pParticle->m_color.a = 255;
}
}
}