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#!N
#!N #!Rdxqca DXQueryConstantArray #!N #!N Function #!N #!N Determines whether
an Array contains constant data, and, if so, returns both the
number of items and in the array and the data value.
#!N #!N Syntax #!N #!F-adobe-times-bold-r-normal--18* #include <dx/dx.h> Array DXQueryConstantArray (Array a,
int *num, Pointer data) #!EF #!N #!N Functional Details #!N #!N
#!F-adobe-times-bold-r-normal--18* DXQueryConstantArray #!EF determines if Array #!F-adobe-times-bold-r-normal--18* a #!EF contains constant
data. If so, if #!F-adobe-times-bold-r-normal--18* num #!EF is not #!F-adobe-times-bold-r-normal--18* NULL
#!EF , the number of items contained in #!F-adobe-times-bold-r-normal--18* a #!EF
is returned in #!F-adobe-times-bold-r-normal--18* *num #!EF . If #!F-adobe-times-bold-r-normal--18* data #!EF
is not #!F-adobe-times-bold-r-normal--18* NULL #!EF , the constant value contained in
#!F-adobe-times-bold-r-normal--18* a #!EF will be copied to the block of memory
pointed to by #!F-adobe-times-bold-r-normal--18* data #!EF . In this case #!F-adobe-times-bold-r-normal--18*
data #!EF should point to a block of memory large enough
to hold one element of #!F-adobe-times-bold-r-normal--18* a #!EF ; this size
can be determined by calling #!F-adobe-times-bold-r-normal--18* DXGetItemSize(a) #!EF . #!N #!N
#!F-adobe-times-bold-r-normal--18* DXQueryConstantArray #!EF considers both Constant Array and Regular Array Objects
with zero delta values to be constant. #!N #!N The value
stored in #!F-adobe-times-bold-r-normal--18* a #!EF may also be accessed by a
call to #!F-adobe-times-bold-r-normal--18* DXGetConstantArrayData #!EF . This call returns a pointer
to the internal memory of #!F-adobe-times-bold-r-normal--18* a #!EF , providing a
#!F-adobe-times-medium-i-normal--18* read-only #!EF copy of the data without the need to
allocate a block of memory. #!N #!N Return Value #!N #!N
Returns #!F-adobe-times-bold-r-normal--18* a #!EF if #!F-adobe-times-bold-r-normal--18* a #!EF contains constant data
or #!F-adobe-times-bold-r-normal--18* NULL #!EF (without setting an error code) if #!F-adobe-times-bold-r-normal--18*
a #!EF is an Array that does not contain constant data;
otherwise, returns #!F-adobe-times-bold-r-normal--18* NULL #!EF and sets an error code. #!N
#!N See Also #!N #!N #!F-adobe-times-bold-r-normal--18* #!Ldxgcad,dxall1230 h DXGetConstantArrayData #!EL , #!Ldxgis,dxall1245 h DXGetItemSize #!EL , #!Ldxncav,dxall1314 h DXNewConstantArray, DXNewConstantArrayV #!EL
, #!Ldxnra,dxall1324 h DXNewRegularArray #!EL #!EF #!N #!N #!Lctas,dxall1079 h Constant Arrays #!EL . #!N #!N #!N #!F-adobe-times-medium-i-normal--18*
Next Topic #!EF #!N #!N #!Ldxqdl,dxall1342 h DXQueryDistantLight #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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