modify depthGenerator to show only pixels in a certain z depth

[heaversm]

Hi - I'm working on an oF project that exports ONI files as OBJs for use in a 3D modeling program. It utilizes ofxOpenNI's depth generator to show a color delineated depthImage of the captured ONI file. The interface allows you to set the z depth for the vertices that should be exported, but without a visual representation of this, it's hard to know where to set that depth range. Is there any way to tell the depth generator what z range to display?