Parametric diffuser for LED strips.

Parameters (in milimeters) :

• length - length of LED strip you want to cover (in my case, 50mm per segment)
• width - width of the LED strip (usually around 10mm)
• height - height of the LED strip, with diodes (in my case - 2mm)
• thickness - thickness of the diffuser to be
• spacing - distance between LED strip and the diffuser
• close_front - should it have closing lid in the front (true/false)
• close_back - should it have closing lid in the back (true/false)