349 lines
12 KiB
Python
349 lines
12 KiB
Python
from __future__ import annotations
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import math
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import uuid
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from typing import TYPE_CHECKING, Any, Literal
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from typing_extensions import Self
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if TYPE_CHECKING:
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from .scene import Scene, SceneObject
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class Object3D:
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current_scene: Scene | None = None
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def __init__(self, type_: str, *args: Any) -> None:
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self.type = type_
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self.id = str(uuid.uuid4())
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self.name: str | None = None
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assert self.current_scene is not None
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self.scene: Scene = self.current_scene
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self.scene.objects[self.id] = self
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self.parent: Object3D | SceneObject = self.scene.stack[-1]
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self.args: list = list(args)
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self.color: str | None = '#ffffff'
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self.opacity: float = 1.0
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self.side_: str = 'front'
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self.visible_: bool = True
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self.draggable_: bool = False
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self.x: float = 0
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self.y: float = 0
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self.z: float = 0
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self.R: list[list[float]] = [[1, 0, 0], [0, 1, 0], [0, 0, 1]]
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self.sx: float = 1
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self.sy: float = 1
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self.sz: float = 1
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self._create()
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def with_name(self, name: str) -> Self:
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"""Set the name of the object."""
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self.name = name
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self._name()
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return self
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@property
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def data(self) -> list[Any]:
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"""Data to be sent to the frontend."""
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return [
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self.type, self.id, self.parent.id, self.args,
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self.name,
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self.color, self.opacity, self.side_,
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self.x, self.y, self.z,
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self.R,
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self.sx, self.sy, self.sz,
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self.visible_,
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self.draggable_,
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]
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def __enter__(self) -> Self:
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self.scene.stack.append(self)
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return self
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def __exit__(self, *_) -> None:
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self.scene.stack.pop()
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def _create(self) -> None:
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self.scene.run_method('create', self.type, self.id, self.parent.id, *self.args)
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def _name(self) -> None:
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self.scene.run_method('name', self.id, self.name)
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def _material(self) -> None:
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self.scene.run_method('material', self.id, self.color, self.opacity, self.side_)
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def _move(self) -> None:
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self.scene.run_method('move', self.id, self.x, self.y, self.z)
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def _rotate(self) -> None:
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self.scene.run_method('rotate', self.id, self.R)
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def _scale(self) -> None:
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self.scene.run_method('scale', self.id, self.sx, self.sy, self.sz)
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def _visible(self) -> None:
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self.scene.run_method('visible', self.id, self.visible_)
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def _draggable(self) -> None:
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self.scene.run_method('draggable', self.id, self.draggable_)
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def _delete(self) -> None:
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self.scene.run_method('delete', self.id)
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def material(self,
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color: str | None = '#ffffff',
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opacity: float = 1.0,
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side: Literal['front', 'back', 'both'] = 'front',
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) -> Self:
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"""Set the color and opacity of the object.
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:param color: CSS color string (default: '#ffffff')
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:param opacity: opacity between 0.0 and 1.0 (default: 1.0)
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:param side: 'front', 'back', or 'double' (default: 'front')
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"""
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if self.color != color or self.opacity != opacity or self.side_ != side:
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self.color = color
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self.opacity = opacity
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self.side_ = side
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self._material()
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return self
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def move(self, x: float = 0.0, y: float = 0.0, z: float = 0.0) -> Self:
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"""Move the object.
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:param x: x coordinate
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:param y: y coordinate
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:param z: z coordinate
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"""
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if self.x != x or self.y != y or self.z != z:
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self.x = x
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self.y = y
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self.z = z
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self._move()
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return self
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@staticmethod
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def rotation_matrix_from_euler(r_x: float, r_y: float, r_z: float) -> list[list[float]]:
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"""Create a rotation matrix from Euler angles.
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:param r_x: rotation around the x axis in radians
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:param r_y: rotation around the y axis in radians
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:param r_z: rotation around the z axis in radians
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"""
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sx, cx = math.sin(r_x), math.cos(r_x)
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sy, cy = math.sin(r_y), math.cos(r_y)
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sz, cz = math.sin(r_z), math.cos(r_z)
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return [
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[cz * cy, -sz * cx + cz * sy * sx, sz * sx + cz * sy * cx],
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[sz * cy, cz * cx + sz * sy * sx, -cz * sx + sz * sy * cx],
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[-sy, cy * sx, cy * cx],
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]
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def rotate(self, r_x: float, r_y: float, r_z: float) -> Self:
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"""Rotate the object.
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:param r_x: rotation around the x axis in radians
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:param r_y: rotation around the y axis in radians
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:param r_z: rotation around the z axis in radians
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"""
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return self.rotate_R(self.rotation_matrix_from_euler(r_x, r_y, r_z))
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def rotate_R(self, R: list[list[float]]) -> Self:
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"""Rotate the object.
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:param R: 3x3 rotation matrix
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"""
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if self.R != R:
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self.R = R
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self._rotate()
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return self
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def scale(self, sx: float = 1.0, sy: float | None = None, sz: float | None = None) -> Self:
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"""Scale the object.
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:param sx: scale factor for the x axis
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:param sy: scale factor for the y axis (default: `sx`)
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:param sz: scale factor for the z axis (default: `sx`)
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"""
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if sy is None:
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sy = sx
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if sz is None:
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sz = sx
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if self.sx != sx or self.sy != sy or self.sz != sz:
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self.sx = sx
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self.sy = sy
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self.sz = sz
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self._scale()
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return self
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def visible(self, value: bool = True) -> Self:
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"""Set the visibility of the object.
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:param value: whether the object should be visible (default: `True`)
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"""
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if self.visible_ != value:
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self.visible_ = value
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self._visible()
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return self
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def draggable(self, value: bool = True) -> Self:
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"""Set whether the object should be draggable.
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:param value: whether the object should be draggable (default: `True`)
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"""
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if self.draggable_ != value:
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self.draggable_ = value
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self._draggable()
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return self
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def attach(self, parent: Object3D) -> None:
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"""Attach the object to a parent object.
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The position and rotation of the object are preserved so that the object does not move in space.
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But note that scaling is not preserved.
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If either the parent or the object itself is scaled, the object shape and position can change.
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*Added in version 2.7.0*
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"""
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self.detach()
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self.parent = parent
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self._move_into_parent(parent)
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self.scene.run_method('attach', self.id, parent.id, self.x, self.y, self.z, self.R)
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def _move_into_parent(self, parent: Object3D | SceneObject) -> None:
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if not isinstance(parent, Object3D):
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return
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if isinstance(parent.parent, Object3D):
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self._move_into_parent(parent.parent)
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M1: list[list[float]] = [
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[self.R[0][0], self.R[0][1], self.R[0][2], self.x],
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[self.R[1][0], self.R[1][1], self.R[1][2], self.y],
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[self.R[2][0], self.R[2][1], self.R[2][2], self.z],
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[0, 0, 0, 1],
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]
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M2_inv: list[list[float]] = [
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[parent.R[0][0], parent.R[1][0], parent.R[2][0],
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- parent.R[0][0] * parent.x
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- parent.R[1][0] * parent.y
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- parent.R[2][0] * parent.z],
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[parent.R[0][1], parent.R[1][1], parent.R[2][1],
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- parent.R[0][1] * parent.x
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- parent.R[1][1] * parent.y
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- parent.R[2][1] * parent.z],
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[parent.R[0][2], parent.R[1][2], parent.R[2][2],
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- parent.R[0][2] * parent.x
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- parent.R[1][2] * parent.y
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- parent.R[2][2] * parent.z],
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[0, 0, 0, 1],
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]
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M: list[list[float]] = [
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[
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M2_inv[0][0] * M1[0][0] + M2_inv[0][1] * M1[1][0] + M2_inv[0][2] * M1[2][0],
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M2_inv[0][0] * M1[0][1] + M2_inv[0][1] * M1[1][1] + M2_inv[0][2] * M1[2][1],
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M2_inv[0][0] * M1[0][2] + M2_inv[0][1] * M1[1][2] + M2_inv[0][2] * M1[2][2],
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M2_inv[0][0] * M1[0][3] + M2_inv[0][1] * M1[1][3] + M2_inv[0][2] * M1[2][3] + M2_inv[0][3],
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],
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[
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M2_inv[1][0] * M1[0][0] + M2_inv[1][1] * M1[1][0] + M2_inv[1][2] * M1[2][0],
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M2_inv[1][0] * M1[0][1] + M2_inv[1][1] * M1[1][1] + M2_inv[1][2] * M1[2][1],
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M2_inv[1][0] * M1[0][2] + M2_inv[1][1] * M1[1][2] + M2_inv[1][2] * M1[2][2],
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M2_inv[1][0] * M1[0][3] + M2_inv[1][1] * M1[1][3] + M2_inv[1][2] * M1[2][3] + M2_inv[1][3],
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],
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[
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M2_inv[2][0] * M1[0][0] + M2_inv[2][1] * M1[1][0] + M2_inv[2][2] * M1[2][0],
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M2_inv[2][0] * M1[0][1] + M2_inv[2][1] * M1[1][1] + M2_inv[2][2] * M1[2][1],
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M2_inv[2][0] * M1[0][2] + M2_inv[2][1] * M1[1][2] + M2_inv[2][2] * M1[2][2],
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M2_inv[2][0] * M1[0][3] + M2_inv[2][1] * M1[1][3] + M2_inv[2][2] * M1[2][3] + M2_inv[2][3],
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],
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[
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0, 0, 0, 1,
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],
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]
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self.x = M[0][3]
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self.y = M[1][3]
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self.z = M[2][3]
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self.R = [
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[M[0][0], M[0][1], M[0][2]],
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[M[1][0], M[1][1], M[1][2]],
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[M[2][0], M[2][1], M[2][2]],
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]
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def detach(self) -> None:
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"""Remove the object from its parent group object.
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The position and rotation of the object are preserved so that the object does not move in space.
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But note that scaling is not preserved.
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If either the parent or the object itself is scaled, the object shape and position can change.
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*Added in version 2.7.0*
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"""
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self._move_out_of_parent(self.parent)
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self.parent = self.scene.stack[0]
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self.scene.run_method('detach', self.id, self.x, self.y, self.z, self.R)
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def _move_out_of_parent(self, parent: Object3D | SceneObject) -> None:
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if not isinstance(parent, Object3D):
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return
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M1: list[list[float]] = [
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[self.R[0][0], self.R[0][1], self.R[0][2], self.x],
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[self.R[1][0], self.R[1][1], self.R[1][2], self.y],
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[self.R[2][0], self.R[2][1], self.R[2][2], self.z],
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[0, 0, 0, 1],
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]
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M2: list[list[float]] = [
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[parent.R[0][0], parent.R[0][1], parent.R[0][2], parent.x],
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[parent.R[1][0], parent.R[1][1], parent.R[1][2], parent.y],
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[parent.R[2][0], parent.R[2][1], parent.R[2][2], parent.z],
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[0, 0, 0, 1],
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]
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M: list[list[float]] = [
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[
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M2[0][0] * M1[0][0] + M2[0][1] * M1[1][0] + M2[0][2] * M1[2][0],
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M2[0][0] * M1[0][1] + M2[0][1] * M1[1][1] + M2[0][2] * M1[2][1],
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M2[0][0] * M1[0][2] + M2[0][1] * M1[1][2] + M2[0][2] * M1[2][2],
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M2[0][0] * M1[0][3] + M2[0][1] * M1[1][3] + M2[0][2] * M1[2][3] + M2[0][3],
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],
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[
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M2[1][0] * M1[0][0] + M2[1][1] * M1[1][0] + M2[1][2] * M1[2][0],
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M2[1][0] * M1[0][1] + M2[1][1] * M1[1][1] + M2[1][2] * M1[2][1],
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M2[1][0] * M1[0][2] + M2[1][1] * M1[1][2] + M2[1][2] * M1[2][2],
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M2[1][0] * M1[0][3] + M2[1][1] * M1[1][3] + M2[1][2] * M1[2][3] + M2[1][3],
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],
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[
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M2[2][0] * M1[0][0] + M2[2][1] * M1[1][0] + M2[2][2] * M1[2][0],
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M2[2][0] * M1[0][1] + M2[2][1] * M1[1][1] + M2[2][2] * M1[2][1],
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M2[2][0] * M1[0][2] + M2[2][1] * M1[1][2] + M2[2][2] * M1[2][2],
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M2[2][0] * M1[0][3] + M2[2][1] * M1[1][3] + M2[2][2] * M1[2][3] + M2[2][3],
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],
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[
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0, 0, 0, 1,
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],
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]
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self.x = M[0][3]
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self.y = M[1][3]
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self.z = M[2][3]
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self.R = [
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[M[0][0], M[0][1], M[0][2]],
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[M[1][0], M[1][1], M[1][2]],
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[M[2][0], M[2][1], M[2][2]],
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]
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if isinstance(parent.parent, Object3D):
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self._move_out_of_parent(parent.parent)
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@property
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def children(self) -> list[Object3D]:
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"""List of children of the object.
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*Added in version 2.4.0*
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"""
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return [object for object in self.scene.objects.values() if object.parent == self]
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def delete(self) -> None:
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"""Delete the object."""
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for child in self.children:
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child.delete()
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del self.scene.objects[self.id]
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self._delete()
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