bool CGodRaysEffect::SetMaterialParms( const Vector& vLightPos )
{
int nSunX, nSunY;
bool bOnScreen = GetVectorInHudSpace( vLightPos, nSunX, nSunY );
if( bOnScreen )
{
// Set the material parameters.
m_pGrDecayVar->SetFloatValue( gfx_gr_decay.GetFloat() );
m_pGrDensityVar->SetFloatValue( gfx_gr_density.GetFloat() );
m_pGrExposureVar->SetFloatValue( gfx_gr_exposure.GetFloat() );
m_pGrWeightVar->SetFloatValue( gfx_gr_weight.GetFloat() );
// Set the sun position.
float flSunX = float( nSunX ) / float( ScreenWidth() );
float flSunY = float( nSunY ) / float( ScreenHeight() );
m_pGrSunPosVar->SetVecValue(flSunX, flSunY);
}
return bOnScreen;
#if 0
// Convert from 3d to 2d.
Vector vLightPos2d;
int behind = ScreenTransform( vLightPos, vLightPos2d );
if( behind == 0 )
{
m_pGrDecayVar->SetFloatValue( gfx_gr_decay.GetFloat() );
m_pGrDensityVar->SetFloatValue( gfx_gr_density.GetFloat() );
m_pGrExposureVar->SetFloatValue( gfx_gr_exposure.GetFloat() );
m_pGrWeightVar->SetFloatValue( gfx_gr_weight.GetFloat() );
int sunX, sunY;
GetVectorInScreenSpace( vLightPos, sunX, sunY );
m_pGrSunPosVar->SetVecValue( sunX / ScreenWidth(), sunY / ScreenHeight() );
return true;
}
return false;
#endif
}
//-----------------------------------------------------------------------------
// Purpose: Get the x & y positions of an entity in Vgui space
// Returns true if it's onscreen
//-----------------------------------------------------------------------------
bool GetTargetInHudSpace( C_BaseEntity *pTargetEntity, int& iX, int& iY, Vector *vecOffset )
{
return GetVectorInHudSpace( pTargetEntity->WorldSpaceCenter(), iX, iY, vecOffset );
}