Method GetHashValue

trinity/Shader/Tr2Effect.cpp:1523–1550

-------------------------------------------------------------------------------------- Description: This method computes a hash value for the effect based on its path name and parameters. It is not without faults: the method doen't check which parameters are actually used by the effect, doesn't do anything with values coming from a variable store. The method is not light-weight and should not be c

//   Hash value for the effect
// --------------------------------------------------------------------------------------
unsigned Tr2Effect::GetHashValue() const
{
	unsigned hash = 0;
	if( m_effectResource )
	{
		hash = CcpHashFNV1( m_effectResource->GetPath(), wcslen( m_effectResource->GetPath() ) * sizeof( wchar_t ) );
	}
	for( auto& option : m_options )
	{
		hash = CcpHashFNV1( &option, sizeof( option ), hash );
	}
	for( auto it = m_constParameters.begin(); it != m_constParameters.end(); ++it )
	{
		auto name = it->name.c_str();
		// looks scary, but it's a constant string, so the pointer is unique
		hash = CcpHashFNV1( &name, sizeof( name ), hash );
		hash = CcpHashFNV1( &it->value, sizeof( it->value ), hash );
	}
	for( auto it = m_parameters.begin(); it != m_parameters.end(); ++it )
	{
		hash = ( *it )->GetHashValue( hash );
	}
	for( auto it = m_resources.begin(); it != m_resources.end(); ++it )
	{
		hash = ( *it )->GetHashValue( hash );
	}
	return hash;
}

ITriEffectParameter* Tr2Effect::FindParameterByName( const char* name ) const
{