Reserved Names

Visual3D Reserved Names

NAN

NAN is a reserved string used to designate "Not a Number".

Visual3D commands refer to NO_DATA or DATA_NOT_FOUND as NAN

For example, the expression 1/0 results in NAN

isNAN(expression) tests values against NAN - If the number is NAN the result is 1, otherwise the result is 0

[Set_Pipeline_Parameter_From_Expression]

/PARAMETER_NAME= NAN_TEST

/EXPRESSION=ISNAN(1/0)

/AS_INTEGER=TRUE

;

::NAN_TEST = 1

[Set_Pipeline_Parameter_From_Expression]

/PARAMETER_NAME= NAN_TEST

/EXPRESSION=ISNAN(-999999.000000)

/AS_INTEGER=TRUE

;

::NAN_TEST = 1

Returns "1" because -999999 is equal to Data Not Found in Visual3D.

[Set_Pipeline_Parameter_From_Expression]

/PARAMETER_NAME= NAN_TEST

/EXPRESSION=ISNAN(15)

/AS_INTEGER=TRUE

;

::NAN_TEST = 0

Example: Set negative values to NO_DATA

If the z-component of the LELB signal is below 0 set the frame to NO_DATA

Evaluate_Expression

/EXPRESSION=(TARGET::ORIGINAL::LELB::Z>0)/(TARGET::ORIGINAL::LELB::Z>0)*TARGET::ORIGINAL::LELB

/RESULT_NAME=LELB

/RESULT_TYPE=TARGET

/RESULT_FOLDER=PROCESSED

;