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Every time we need to make a place to store a region's bounds, we have to write quite a bit of boilerplate code to stash the bounds type into the collision modifier. This removes the need to do that by making a helper function that generates those helper functions for us. Generally, we would use `functools.partial` to do this, but Blender requires function objects for the `EnumProperty`'s getter and setter. Partial objects raise a `TypeError`.pull/415/head
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6 changed files with 109 additions and 67 deletions
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# This file is part of Korman. |
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# |
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# Korman is free software: you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation, either version 3 of the License, or |
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# (at your option) any later version. |
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# |
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# Korman is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with Korman. If not, see <http://www.gnu.org/licenses/>. |
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from __future__ import annotations |
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from bpy.props import * |
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from typing import * |
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# These are the kinds of physical bounds Plasma can work with. |
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# This sequence is acceptable in any EnumProperty |
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_bounds_types = ( |
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("box", "Bounding Box", "Use a perfect bounding box"), |
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("sphere", "Bounding Sphere", "Use a perfect bounding sphere"), |
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("hull", "Convex Hull", "Use a convex set encompasing all vertices"), |
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("trimesh", "Triangle Mesh", "Use the exact triangle mesh (SLOW!)") |
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) |
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def _bounds_type_index(key: str) -> int: |
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return list(zip(*_bounds_types))[0].index(key) |
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def _bounds_type_str(idx: int) -> str: |
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return _bounds_types[idx][0] |
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def _get_bounds(physics_attr: Optional[str]) -> Callable[[Any], int]: |
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def getter(self) -> int: |
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physics_object = getattr(self, physics_attr) if physics_attr is not None else self.id_data |
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if physics_object is not None: |
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return _bounds_type_index(physics_object.plasma_modifiers.collision.bounds) |
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return _bounds_type_index("hull") |
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return getter |
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def _set_bounds(physics_attr: Optional[str]) -> Callable[[Any, int], None]: |
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def setter(self, value: int): |
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physics_object = getattr(self, physics_attr) if physics_attr is not None else self.id_data |
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if physics_object is not None: |
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physics_object.plasma_modifiers.collision.bounds = _bounds_type_str(value) |
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return setter |
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def bounds(physics_attr: Optional[str] = None, store_on_collider: bool = True, **kwargs) -> str: |
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assert not {"items", "get", "set"} & kwargs.keys(), "You cannot use the `items`, `get`, or `set` keyword arguments" |
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if store_on_collider: |
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kwargs["get"] = _get_bounds(physics_attr) |
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kwargs["set"] = _set_bounds(physics_attr) |
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if "default" not in kwargs: |
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kwargs["default"] = "hull" |
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return EnumProperty( |
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items=_bounds_types, |
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**kwargs |
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) |
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