Adds plot method to Bin object.

[nmingotti]

I have added a simple way to plot a Bin and the contained Items. Besides being nice to see this should help highlight in which cases the algorithm is not working. I apologize If i made some mistakes this is my first pull request. bye

[Thothore]

Any news ? It would be neat to have some integrated visualization @enzoruiz

[nobel6018]

@nmingotti Thank you for awesome feature.
I think it could be more useful if rotation is considered when plot the figure.

::::::::::: medium-2-box(13.625x11.875x3.375, max_weight:70.000) vol(546.064)
FITTED ITEMS:
====>  250g [powder 7](7.874x3.937x1.968, weight: 7.000) pos([0, 0, 0]) rt(0) vol(61.008)
====>  250g [powder 8](7.874x3.937x1.968, weight: 8.000) pos([Decimal('7.874'), 0, 0]) rt(1) vol(61.008)  // rt(1) rotation is true
====>  250g [powder 9](7.874x3.937x1.968, weight: 9.000) pos([0, Decimal('3.937'), 0]) rt(0) vol(61.008)
UNFITTED ITEMS:
***************************************************

But the figure doesn't consider it.

The blue bin is not rotated.

The code I run is

from py3dbp import Packer, Bin, Item

packer = Packer()

packer.add_bin(Bin('small-envelope', 11.5, 6.125, 0.25, 10))
packer.add_bin(Bin('large-envelope', 15.0, 12.0, 0.75, 15))
packer.add_bin(Bin('small-box', 8.625, 5.375, 1.625, 70.0))
packer.add_bin(Bin('medium-box', 11.0, 8.5, 5.5, 70.0))
packer.add_bin(Bin('medium-2-box', 13.625, 11.875, 3.375, 70.0))
packer.add_bin(Bin('large-box', 12.0, 12.0, 5.5, 70.0))
packer.add_bin(Bin('large-2-box', 23.6875, 11.75, 3.0, 70.0))

packer.add_item(Item('50g [powder 1]', 3.9370, 1.9685, 1.9685, 1))
packer.add_item(Item('50g [powder 2]', 3.9370, 1.9685, 1.9685, 2))
packer.add_item(Item('50g [powder 3]', 3.9370, 1.9685, 1.9685, 3))
packer.add_item(Item('250g [powder 4]', 7.8740, 3.9370, 1.9685, 4))
packer.add_item(Item('250g [powder 5]', 7.8740, 3.9370, 1.9685, 5))
packer.add_item(Item('250g [powder 6]', 7.8740, 3.9370, 1.9685, 6))
packer.add_item(Item('250g [powder 7]', 7.8740, 3.9370, 1.9685, 7))
packer.add_item(Item('250g [powder 8]', 7.8740, 3.9370, 1.9685, 8))
packer.add_item(Item('250g [powder 9]', 7.8740, 3.9370, 1.9685, 9))

packer.pack(distribute_items=True)  // ✅ distribute_item=True

for bin in packer.bins:
    print(":::::::::::", bin.string())

    print("FITTED ITEMS:")
    for item in bin.items:
        print("====> ", item.string())

    print("UNFITTED ITEMS:")
    for item in bin.unfitted_items:
        print("====> ", item.string())

    bin.plotBoxAndItems(bin.name)
    print("***************************************************\n\n")