rdlc data matrix

rdlc data matrix

rdlc data matrix

rdlc data matrix

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The CLLocation object can also tell you how confident the Location Manager is in its latitude and longitude calculations. The horizontalAccuracy property describes the radius of a circle with the coordinate as its center. The larger the value in horizontalAccuracy, the less certain Core Location is of the location. A very small radius indicates a high level of confidence in the determined location. You can see a graphic representation of horizontalAccuracy in the Maps application (see Figure 14-1). The blue circle shown in Maps uses horizontalAccuracy for its radius when it detects your location. The Location Manager thinks you are at the center of that circle. If you re not, you re almost certainly somewhere inside the blue circle. A negative value in horizontalAccuracy is an indication that you cannot rely on the values in coordinate for some reason. The CLLocation object also has a property called altitude that can tell you how many meters above or below sea level you are:

[[OpenALSoundController sharedSoundController] setDistanceModel:AL_INVERSE_DISTANCE_CLAMPED];

The Persisted Query Service or PQS (not shown explicitly in Figure 9-1) is a part of the Gatherer. The PQS is a reverse query processor that evaluates a large set of queries against a single document to determine which queries match the document. During the gathering process, the PQS determines which subscriptions match content. As stated before, the Filter Daemon handles requests from the Gatherer. The Filter Daemon uses protocol handlers to access content sources and IFilters to filter files. Protocol handlers access data over a particular protocol or from a particular store. Examples of common protocol handlers are file protocol, HTTP, MAPI, and HTTPDAV. By default, content store types such as external web sites, SharePoint sites, Network shares, and Exchange folders are supported. It s possible to add or create custom protocol handlers. Content sources are collections of data that must be crawled by the Enterprise Search Service. It is possible to define specific rules for crawling items within a content source. A URL identifies every item within a content source. The protocol portion determines the type of content source and thus determines which protocol handler must be used.

Now it s time to actually set our three properties for our specific game needs. First, in BBSceneObject s init method, set the maxDistance immediately after we create the soundSourceObject:

Each CLLocation object maintains a property called verticalAccuracy that is an indication of how confident Core Location is in its determination of altitude. The value in altitude could be off by as many meters as the value in verticalAccuracy, and if the verticalAccuracy value is negative, Core Location is telling you it could not determine a valid altitude.

soundSourceObject.maxDistance = 600.0;

In addition to these properties, CLLocation also has a useful instance method that will let you determine the distance between two CLLocation objects. The method is called getDistanceFrom:, and it works like this:

In this chapter, you will learn how to create a basic SQL Full-Text extensions search query and fire it at the SharePoint Search service. In this section, we will demonstrate a basic search query and use this query to demonstrate various techniques for interacting with the SharePoint Search service. In this section, you will learn how to use the SharePoint object model and the SharePoint Search web service, and finally, you will learn about a community tool that makes creating and executing SQL Full-Text extensions queries easier.

The maximum size of our game field is approximately 600 units wide. It is unchanging, so we just hard-code this value here.

CLLocationDistance distance = [fromLocation getDistanceFrom:toLocation];

Finally, we need to go through every BBSceneObject subclass we have (for every object we care about) and set the rolloffFactor and referenceDistance properties to something that will work well with our attenuation model. The following are the values I picked. I encourage you to play with them and try other models. UFO: Attenuates, but a little more constant/consistent than other objects.

self.soundSourceObject.rolloffFactor = 0.5; self.soundSourceObject.referenceDistance = 300.0;

The SharePoint Search engine uses probabilistic ranking to determine what item is most likely to match with whatever the end user is looking for. The SharePoint Search engine uses a complex series of algorithms to determine the ranking of indexed items. It is also possible to influence probabilistic ranking yourself; you will learn more about this throughout this chapter.

The preceding line of code will return the distance between two CLLocation objects, fromLocation and toLocation. This distance value returned will be the result of a great-circle distance calculation that ignores the altitude property and calculates the distance as if both points were at sea level. For most purposes, a great-circle calculation will be more than sufficient, but if you do need to take altitude into account when calculating distances, you ll have to write your own code to do it.

Rocks (asteroids): More attenuation than the UFO for depth (distance) perspective, but still loud enough to hear reasonably well from far away.