Evaluate whether object name exists or not

[tmalheiro]

Hello Coppelia,

How can I evaluate whether an object name exists in scene?
simGetObjectHandle is throwing a Lua runtime error, but from documentation I was expecting it to return -1 on error.

Best,
Tiago

[coppelia]

Hello Tiago,

you have two options:

1. You can disable throwing errors for V-REP API functions if you set variable raiseErrorWithApiScriptFunctions to false in system/usrset.txt. This is not an elegant solution, since an error message will still be output in the status bar.
2. You can use following code:

Code: Select all

    local savedState=simGetInt32Parameter(sim_intparam_error_report_mode)
    simSetInt32Parameter(sim_intparam_error_report_mode,0)
    print(simGetObjectHandle('objectName'))
    simSetInt32Parameter(sim_intparam_error_report_mode,savedState)

Cheers

[tmalheiro]

Hi coppelia,

Thank you!

Best,
Tiago

[elephant]

Hello Tiago,

you have two options:

1. You can disable throwing errors for V-REP API functions if you set variable raiseErrorWithApiScriptFunctions to false in system/usrset.txt. This is not an elegant solution, since an error message will still be output in the status bar.
2. You can use following code:

Code: Select all

    local savedState=simGetInt32Parameter(sim_intparam_error_report_mode)
    simSetInt32Parameter(sim_intparam_error_report_mode,0)
    print(simGetObjectHandle('objectName'))
    simSetInt32Parameter(sim_intparam_error_report_mode,savedState)

Cheers

5 years later, newest version of coppelia doesnt have this variable. How we do it now, please?

[fferri]

From sim.getObjectHandle:

objectName: If the name is appended by a "@silentError" suffix, then no error will be output if the object does not exist.

So, sim.getObjectHandle('Floor@silentError')