Creating complex global variables

[zflo]

I would like to create a complex global variable in my environment and read it out in the fitness script. It is supposed to represent 4 3D positions, so it must be some sort of 4 by 3 matrix. Is there some nerd.createGlobalProperty thing to do that (and some way to "decode" the data back to usable position vectors, in the fitness script)? So far, I didn't even manage to convert a new Array([...],[...],...) into a string, such that it would pass as a globalDoubleProperty. Shouldn't be a problem, eventually, but isn't there a simpler way?

[cybott]

No, there is no direct way to do that. You can:

1. Create 12 new double values in the VariableRepository using
   nerd.createGlobalDoubleValue() and access these values in the script via
   a declaration of nerd.defineVariable(). With this approach, all
   variables would be automatically present in the script during each
   execution step, which is comparably efficient. See
   http://www.ultopia.de/drupal/nerddoc/node/76#defVar

2. Create four string values to represent the position vectors as
   string. You may use the helper function nerd.toVector3DString() to set
   the values and nerd.getVectorElement(string vectorString, int index). Or
   you could write your own helper scripts to read and write the string
   representation of your own vector or matrix string. See
   http://www.ultopia.de/drupal/nerddoc/node/76#HelperFunctions.

3. Implement a new function to class ScriptingContext, e.g. bool
   createGlobalVector3DProperty(const QString &propertyName, double x,
   double y, double z); That function should be implemented similar to bool
   createGlobalDoubleProperty(const QString &propertyName, double content =
   0.0);

Hope this helps.

On 03/11/2014 06:12 PM, zflo wrote:

I would like to create a complex global variable in my environment and
read it out in the fitness script. It is supposed to represent 4 3D
positions, so it must be some sort of 4 by 3 matrix. Is there some
|nerd.createGlobalProperty| thing to do that (and some way to "decode"
the data back to usable position vectors, in the fitness script)? So
far, I didn't even manage to convert a |new Array([...],[...],...)|
into a string, such that it would pass as a globalDoubleProperty.
Shouldn't be a problem, eventually, but isn't there a simpler way?

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