umm, i'm not too sure i know what you mean by 'voxel'
do you mean vertex?

normally in this case i would get the Open GL for java, make my model in Maya, and then export the file out so that OpenGL can read it

however, i know that the free edition of Maya does not allow you to export, or else you could use it comercially without anyone knowing (since there is no additional information to protect the product in exported files)

now, i've just tried this, to see if my following suggestion would work, but it looks like i either need to learn Mel or Phython, neither of which i have sufficient experience with

what i was going to suggest is that you create your plane in maya, then you click a vertex and copy its (x,y,z) coordinate which you would put into your input file for java

but, it appears there's no such information in the channel box
so i thought that the script editor would telll me the coordinates of a vertex, but i don't know how to get it to print and tell me the value of a point...