Function ExtractLodingAnnotations

trinity/Shader/Tr2Effect.cpp:1376–1431

}

bool ExtractLodingAnnotations( std::array<float, ITriEffectTextureParameter::UV_SET_MAX_COUNT>& densityScale, const char* name, const Tr2EffectAnnotationMap& effectAnnotations, const Tr2ConstantEffectParameterStructureList& constParams )
{
	std::fill( begin( densityScale ), end( densityScale ), 0.f );

	auto annotations = find_if( begin( effectAnnotations ), end( effectAnnotations ), [name]( auto& x ) { return strcmp( name, x.first ) == 0; } );
	if( annotations == end( effectAnnotations ) )
	{
		return false;
	}
	bool enabled = false;
	uint32_t uvSet = 0;
	float scale = 1;
	const char* prefix = "LodUvScale";
	auto length = strlen( prefix );
	for( auto& annotation : annotations->second )
	{
		if( strncmp( annotation.name, prefix, length ) == 0 )
		{
			char* strEnd;
			auto uvIndex = strtol( annotation.name + length, &strEnd, 10 );
			if( *strEnd != 0 || uvIndex < 0 || uvIndex + 1 >= ITriEffectTextureParameter::UV_SET_MAX_COUNT )
			{
				continue;
			}

			if( auto paramScale = GetUvScaleFromAnnotation( name, annotation, constParams ) )
			{
				densityScale[uvIndex + 1] = *paramScale;
				if( *paramScale > 0 )
				{
					enabled = true;
				}
			}
			else
			{
				return false;
			}
		}
		else if( strcmp( annotation.name, "LodPositionScale" ) == 0 )
		{
			if( auto paramScale = GetUvScaleFromAnnotation( name, annotation, constParams ) )
			{
				densityScale[0] = *paramScale;
				if( *paramScale > 0 )
				{
					enabled = true;
				}
			}
			else
			{
				return false;
			}
		}
	}
	return enabled;
}

}