Geoff wrote:
I am having a little bit of an issue with some of my files. I have a
database that is in FLT format. I can load it into my program, and it
takes a while, but when I query the height at a given x,y location, I
get the proper values.
Now, i have taken this file and converted it using the osgconv.exe
into an IVE file for better performance. This works well when loading
it into my viewer, but when I try and query the height at a given x,y,
the values I get back are erratic and not remotely close to what i am
looking for.
is there some way that the units in the ive could be getting messed up
(or does it even have a notion of units) and if not, what do I need to
do to make sure the number that I get returned is in Feet?
The openflight plugin seems to support a number of options related to
units and conversion (see below).
Perhaps osgconv -O noUnitsConversion file.flt file.ive is what you want...
Paul
>osgconv --formats
[...]
Plugin /home/paul/osg2.6/lib/osgPlugins-2.6.1/osgdb_openflight.so
{
ReaderWriter : FLT Reader/Writer
{
extensions : .flt OpenFlight
format
options : billboardCenter Import option
options : clampToEdge Import option
options : convertToFeet Import option
options : convertToInches Import option
options : convertToKilometers Import option
options : convertToMeters Import option
options : convertToNauticalMiles Import option
options : dofAnimation Import option
options : keepExternalReferences Import option
options : lighting=<ON|OFF> Export
option: Specifies a default enable/disable state for lighting, for Nodes
in the exported scene graph that don't set it explicitly. By default,
the exporter assumes lighting is enabled (GL_LIGHTING ON). Set this to
either ON or OFF. Example: "lighting=OFF".
options : noTextureAlphaForTransparancyBinning Import option
options : noUnitsConversion Import option
options : preserveFace Import option
options : preserveObject Import option
options : readObjectRecordData Import option
options : stripTextureFilePath Export
option: If present in the Options string, the exporter strips the path
from texture file names, and writes only the texture file name to the
FLT Texture Palette. By default, the exporter doesn't strip the path,
and the name written to the Texture Palette is taken directly from the
osg::Image object referenced by the osg::Texture2D StateAttribute.
options : tempDir=<dir> Export
option: Specifies the directory to use for creation of temporary files.
If not specified, the directory is taken from the file name. If the file
doesn't contain a path, the current working directory is used.
Applications should set this to the name of their app-specific temp
directory. If the path contains spaces, use double quotes to ensure
correct parsing. Examples: "tempDir=/tmp", "tempDir="C:\My Temp Dir".
options : units=<units> Export
option: Specifies the contents of the Units field of the OpenFliht
header record. Valid values include INCHES, FEET, METERS, KILOMETERS,
and NATICAL_MILES. Default is METERS. Example: "units=METERS".
options : validate Export
option: If present in the Options string, the plugin does not write an
OpenFlight file. Instead, it returns an indication of the scene graph's
suitability for OpenFlight export.
options : version=<ver> Export
option: Specifies the version of the output OpenFlight file. Supported
values include 15.7, 15.8, and 16.1. Default is 16.1. Example:
"version=15.8".
}
ReaderWriter : ATTR Image Attribute Reader/Writer
{
extensions : .attr OpenFlight texture attribute format
}
}
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