C++ (Cpp) MainViewUp Examples

Example #1

File: c_baseviewmodel.cpp Project: malortie/ulaval

void FormatViewModelAttachment( Vector &vOrigin, bool bInverse )
{
	// Presumably, SetUpView has been called so we know our FOV and render origin.
	const CViewSetup *pViewSetup = view->GetPlayerViewSetup();
	
	float worldx = tan( pViewSetup->fov * M_PI/360.0 );
	float viewx = tan( pViewSetup->fovViewmodel * M_PI/360.0 );

	// aspect ratio cancels out, so only need one factor
	// the difference between the screen coordinates of the 2 systems is the ratio
	// of the coefficients of the projection matrices (tan (fov/2) is that coefficient)
	float factorX = worldx / viewx;

	float factorY = factorX;
	
	// Get the coordinates in the viewer's space.
	Vector tmp = vOrigin - pViewSetup->origin;
	Vector vTransformed( MainViewRight().Dot( tmp ), MainViewUp().Dot( tmp ), MainViewForward().Dot( tmp ) );

	// Now squash X and Y.
	if ( bInverse )
	{
		if ( factorX != 0 && factorY != 0 )
		{
			vTransformed.x /= factorX;
			vTransformed.y /= factorY;
		}
		else
		{
			vTransformed.x = 0.0f;
			vTransformed.y = 0.0f;
		}
	}
	else
	{
		vTransformed.x *= factorX;
		vTransformed.y *= factorY;
	}



	// Transform back to world space.
	Vector vOut = (MainViewRight() * vTransformed.x) + (MainViewUp() * vTransformed.y) + (MainViewForward() * vTransformed.z);
	vOrigin = pViewSetup->origin + vOut;
}

Example #2

File: c_env_starfield.cpp Project: Muini/Nag-asw

//-----------------------------------------------------------------------------
// 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(engine->GetActiveSplitScreenPlayerSlot());

	// 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(engine->GetActiveSplitScreenPlayerSlot()) * cl_starfield_distance.GetFloat() );
		Vector vecEnd = vecViewOrigin + (MainViewRight(engine->GetActiveSplitScreenPlayerSlot()) * RandomFloat(-flDiameter,flDiameter)) + (MainViewUp(engine->GetActiveSplitScreenPlayerSlot()) * 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;
		}
	}
}