IBM Visualization Data Explorer User's Reference

Trace

Category

Debugging

Function

Enable or disables tracing options.

Syntax

Trace(what, how);

Inputs

Name	Type	Default	Description
what	string	none	the object to be traced
how	integer	1	0: set tracing off 1: set tracing on

Functional Details

what

is (1) a keyword specifying the object to be traced or (2) a set of letters specifying a group of debug message classes, as used by the DXEnableDebug() library function (see IBM Visualization Data Explorer Programmer's Reference). At present, the only keyword value allowed for this parameter is "time": Trace("time", 1); will begin the trace, and Trace("time", 0); will print a record of time use since the tracing was started. The output appears in the Message window. If what is a string of lowercase letters other than time, the module calls the DXEnableDebug library function. (The uppercase letters A-Z and the numbers 0-9 are reserved for system use).

how

specifies whether the trace option is activated or not.

Note: If the executive is started with the flag -timing on, the command Trace("time", 0) causes all module entry and exit times to be printed. In the VPE window, this command can be enabled using the Debug Tracing button in the Commands menu of the Message window (see 8.2 , "Using the Message Window" in IBM Visualization Data Explorer User's Guide).

Script Language Example

In this example, the module traces the use of time by Isosurface.

electrondensity = Import("/usr/lpp/dx/samples/data/watermolecule");
electrondensity = Partition(electrondensity);
camera = AutoCamera(electrondensity, width=5);
Trace("time", 1);
isosurface = Isosurface(electrondensity, 0.3);
Trace("time", 0);
Display(isosurface, \camera);

See Also

 Usage

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