"info command rtExMath" in Tk with vtk
I am new for Tcl/Tk. I am using vtk with Tk command window for running vtk
tcl/tk examples. Here is a code which include Tk expression as condition
of if and I am not getting it.
if { [info command rtExMath] != "" } {
##Do something related VTK
}
I have explored info of Tk but there is a combination with keyword command
but no any good explanation I found for rtExMath. Please explain me above.
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