Binvox 2 LDR (Part 2)

Using the binvox python parser allows relatively easy access to each voxel layer slice in the binvox file - once a voxel slice is transferred to a numpy matrix it's then possible to translate each voxel into a single 1x1 Lego brick...

I've included the code to do this here but as I've noted previously a 1x1 brick model isn't much good if you want to actually build a physical representation of the 3D object in question - you need to optimise the voxel matrix for each slice of the model into larger bricks;  and there is a Perl script to do just that here.  This Perl script optimises the voxel slice grouping individual voxels into larger Lego bricks - Exactly what I needed to do in a python script!

One of the disadvantages of this Perl script is that it does not add a strengthening element for each layer in the voxel matrix (so each layer is simply build on the layer below often using similar bricks) which is something that had been raised at London AFOLs, consequently I thought it would be good to try to add some strength to model by rotating each layer at 90 degree's to each other during the translation of voxels to bricks - this would automatically add a degree of strength to any subsequent build.  The other disadvantage with the Perl script is that you have to go through an intermediary text file before you can process the binvox file - it's not a major problem but it would be nice to try to get everything done in one go from binvox to LDR.