68 lines
1.7 KiB
Python
68 lines
1.7 KiB
Python
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from typing import Union, Optional
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from collections import Counter
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from dataclasses import dataclass
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import cadquery as Cq
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from nhf.materials import Role, KEY_ROLE, KEY_ITEM
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@dataclass(frozen=True)
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class Item:
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"""
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A pre-fabricated item
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"""
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mass: float
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#@property
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#def mass(self) -> float:
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# """
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# Mass, in grams
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# """
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# return self._mass
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#@mass.setter
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#def mass(self, value):
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# assert value >= 0, "Mass cannot be negative"
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# self._mass = value
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@property
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def name(self) -> str:
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pass
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@property
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def role(self) -> Optional[Role]:
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return None
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def generate(self, **kwargs) -> Union[Cq.Solid, Cq.Assembly, Cq.Workplane]:
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"""
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Creates an assembly for this item. Subclass should implement this
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"""
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return Cq.Assembly()
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def assembly(self, **kwargs) -> Cq.Assembly:
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"""
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Interface for creating assembly with the necessary metadata
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"""
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a = self.generate(**kwargs)
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if isinstance(a, Cq.Workplane) or isinstance(a, Cq.Solid):
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a = Cq.Assembly(a)
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if role := self.role:
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a.metadata[KEY_ROLE] = role
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a.color = role.color_avg()
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assert isinstance(a, Cq.Assembly)
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assert KEY_ITEM not in a.metadata
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a.metadata[KEY_ITEM] = self
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return a
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@staticmethod
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def count(a: Cq.Assembly) -> Counter:
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"""
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Counts the number of items
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"""
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occ = Counter()
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for _, obj in a.traverse():
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if KEY_ITEM not in obj.metadata:
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continue
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item = obj.metadata[KEY_ITEM]
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assert isinstance(item, Item)
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occ[item.name] += 1
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return occ
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