98 lines
2.4 KiB
Python
98 lines
2.4 KiB
Python
import typing as typ
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import bpy
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import sympy as sp
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import sympy.physics.units as spu
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import pydantic as pyd
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sp.printing.str.StrPrinter._default_settings['abbrev'] = True
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## When we str() a unit expression, use abbrevied units.
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from .. import base
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from ... import contracts
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class PhysicalVolumeBLSocket(base.BLSocket):
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socket_type = contracts.SocketType.PhysicalVolume
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bl_label = "Physical Volume"
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use_units = True
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compatible_types = {
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sp.Expr: {
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lambda self, v: v.is_real,
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lambda self, v: len(v.free_symbols) == 0,
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lambda self, v: any(
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contracts.is_exactly_expressed_as_unit(v, unit)
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for unit in self.units.values()
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)
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},
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}
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####################
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# - Properties
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####################
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raw_value: bpy.props.FloatProperty(
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name="Unitless Volume",
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description="Represents the unitless part of the area",
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default=0.0,
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precision=6,
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)
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####################
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# - Socket UI
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####################
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def draw_label_row(self, label_col_row: bpy.types.UILayout, text: str) -> None:
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"""Draw the value of the area, including a toggle for
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specifying the active unit.
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"""
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label_col_row.label(text=text)
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#label_col_row.prop(self, "raw_value", text="")
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label_col_row.prop(self, "raw_unit", text="")
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def draw_value(self, col: bpy.types.UILayout) -> None:
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col_row = col.row(align=True)
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col_row.prop(self, "raw_value", text="")
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#col_row.prop(self, "unit", text="")
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####################
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# - Computation of Default Value
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####################
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@property
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def default_value(self) -> sp.Expr:
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"""Return the area as a sympy expression, which is a pure real
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number perfectly expressed as the active unit.
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Returns:
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The area as a sympy expression (with units).
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"""
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return self.raw_value * self.unit
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@default_value.setter
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def default_value(self, value: typ.Any) -> None:
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"""Set the area from a sympy expression, including any required
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unit conversions to normalize the input value to the selected
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units.
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"""
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self.raw_value = self.value_as_unit(value)
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####################
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# - Socket Configuration
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####################
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class PhysicalVolumeSocketDef(pyd.BaseModel):
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socket_type: contracts.SocketType = contracts.SocketType.PhysicalVolume
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label: str
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default_unit: typ.Any | None = None
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def init(self, bl_socket: PhysicalVolumeBLSocket) -> None:
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if self.default_unit:
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bl_socket.unit = self.default_unit
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####################
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# - Blender Registration
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####################
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BL_REGISTER = [
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PhysicalVolumeBLSocket,
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]
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