Get Region Parcels Bounding Box

7 June 2015

  • Release 8.22 - added the optional region parameter.

17 December 2014

  • Release 7.30 - added.
getregionparcelsboundingbox (Commands)
TypeCorrade progressive command
Commandgetregionparcelsboundingbox
DescriptionThe parcels on the current region can be retrieved using the getregionparcelsboundingbox which returns pairs of coordinates as a CSV list of the extremities of the parcels to be found on the current region.
Permissionsland
Parametersgroup, password
Last ChangesRelease 8.22 - added the optional region parameter.

The parcels on the current region can be retrieved using the getregionparcelsboundingbox which returns pairs of coordinates as a CSV list of the extremities of the parcels to be found on the current region.

Command Required Parameters Required Corrade Permissions Example
getregionparcelsboundingbox group, password land
llInstantMessage(CORRADE,
    wasKeyValueEncode(
        [
            "command", "getregionparcelsboundingbox",
            "group", wasURLEscape(GROUP),
            "password", wasURLEscape(PASSWORD),
            "callback", wasURLEscape(URL)
        ]
    )
);
Optional Parameter Possible Values Description
region A string representing a region name. Attempt to perform the command on the specified region. Note that Corrade must be connected to that region. If in doubt, please use the getconnectedregions command to determine whether the region you want to specify is currently connected.

Corrade refers to parcels by a single coordinate that lies within the area of the parcel to refer to. However, in order to find parcels to refer to, the getregionparcelsboundingbox can be used.

What the Coordinates Represent

We teleported to Milkyway Island, a German sandbox in Second Life and used the getregionparcelsboundingbox to retrieve the bounding-boxes of all the parcels on the region. The plots data returned by Corrade was the following:

plots=<0, 0, 0>, <256, 256, 50>, <0, 0, 0>, <20, 44, 50>, <80, 0, 0>, <144, 4, 50>, <200, 0, 0>, <256, 44, 50>, <252, 0, 0>, <256, 4, 50>, <0, 68, 0>, <4, 164, 50>, <0, 180, 0>, <44, 256, 50>

By taking pairs of vectors and plotting the result over the map, we obtain the following representation:

One of the small pairs is the pair of vectors:

<256, 44, 50>, <252, 0, 0>

which we have highlighted and then teleported to those coordinates. There we found the $4m \times 4m$ plot that corresponds to that pair of coordinates.

Determining Parcel Points

In order to get a coordinate that represents the parcel, one which you may want to pass to the position parameter of other Corrade commands, you would retrieve all the parcels bounding boxes with the getregionparcelsboundingbox command and then compute the midpoint of segment going through both points.

In other words, you will take the data returned from Corrade:

plots=<0, 0, 0>, <256, 256, 50>, <0, 0, 0>, <20, 44, 50>, <80, 0, 0>, <144, 4, 50>, <200, 0, 0>, <256, 44, 50>, <252, 0, 0>, <256, 4, 50>, <0, 68, 0>, <4, 164, 50>, <0, 180, 0>, <44, 256, 50>

take pairs of two and calculate the midpoint which will give you the parcel positions:

<128, 128, 0>
<10, 22, 0>
<112, 2, 0>
<228, 22, 0>
<254, 2, 0>
<2, 116, 0>
<22, 218, 0>

Now all these vectors represent one (and only one) of the parcels in the region (a total of 7 parcels in this example) and each of these vectors can be passed to the position parameter of Corrade when you want to refer to a parcel using parcel-related commands.


secondlife/scripted_agents/corrade/api/progressive/commands/getregionparcelsboundingbox.txt ยท Last modified: 2017/02/22 18:29 (external edit)

Access website using Tor


For the copyright, license, warranty and privacy terms for the usage of this website please see the license and privacy pages.