...
The following code reserves a specified number of object handle values in an OdDbDatabase , and then supplies a custom handle value for an entity that is added to the database:
...
MFC provides its own versions of "new" and "delete", " thus causing the error.
This error can be resolved by not linking To resolve this error, do not link TD_XXXX_Alloc.lib into to the client application, and by instead including . Instead, include the following code somewhere in the client application:
...
Most likely you have the (/Zc:wchar_t) compiler option set. This causes wchar_t to be defined as its own type. Since the DWGdirect libraries are not built with this option, the linker is treating wchar_t (from your application) as a separate type from the one used to compile the DWGdirect libraries internally (there , where it is defined as unsigned short).If you remove this option from your language settings, the error
will go awayDisabling (/Zc:wchar_t) compiler option eliminates the error.
Working with DWG Files
When I convert a DWG 2004 file back to R15, why do my gradient fills disappear and other items look different, such as colors?
DWG 2004 files can store a direct color or RGB value, which allows a single drawing to store millions of unique color values to be stored in a single drawing. DWG R15 files and earlier versions can only store a color table index, which is a number representing one of 255 possible colors. When saving a DWG 2004 file back as DWG R15 or earlier, each RGB value must be mapped to the closest color table entry and stored as a color table index. As a result, the colors in the DWG R15 file may look bleak or dreary when compared to the original DWG 2004 file. DWG R15 files saved from AutoCAD 2004 exhibit the same behavior.
...
MText in DWG 2004 files can contain tabs and indentation values. These items , which are not supported in DWG R15 and earlier files, so they will be and are lost when saving from DWG 2004 back to these earlier versions. This loss can change the The formatting and appearance of MText may change.
Also note that Note: AutoCAD R14 supports only a single paper space layout , and it does not support lineweights (, as lineweights were added in AutoCAD 2000).
Working with Drawings
How do I determine the drawing units (millimeters, inches, feet, or kilometers) of a drawing?
There are a number of system variables stored in a drawing that are responsible for units and their display. The DWG version in which the system variables were introduced is important. Some As some DWG file versions do not store all of the system variables so if , loading an older file is loaded, assigns default values to the newer system variables are assigned default values.
MEASUREMENT is a read-only system variable, which was introduced in DWG R14. This system variable controls hatch pattern and linetype files used in the drawing.
OdDb::MeasurementValue OdDbDatabase::getMEASUREMENT()
The Returned values returned are:
kEnglish — Uses files with ANSI Hatch and Linetype definitions (acad.pat and
acad.lin).kMetric — Uses files with ISO Hatch and Linetype definitions (acadiso.pat and acadiso.lin).
...
OdDb::UnitsValue OdDbDatabase::getINSUNITS()
The Returned values returned are:
kUnitsUndefined = 0
kUnitsInches = 1
kUnitsFeet = 2
kUnitsMiles = 3
kUnitsMillimeters = 4
kUnitsCentimeters = 5
kUnitsMeters = 6
kUnitsKilometers = 7
kUnitsMicroinches = 8
kUnitsMils = 9
kUnitsYards = 10
kUnitsAngstroms = 11
kUnitsNanometers = 12
kUnitsMicrons = 13
kUnitsDecimeters = 14
kUnitsDekameters = 15
kUnitsHectometers = 16
kUnitsGigameters = 17
kUnitsAstronomical = 18
kUnitsLightYears = 19
kUnitsParsecs = 20
kUnitsMax = kUnitsParsecs
...