def setTransformation(self, transformation: Matrix):
self._transformation = transformation.copy() # Make a copy to ensure we never change the given transformation
self._transformChanged()
class SceneNode:
class TransformSpace:
Local = 1 #type: int
Parent = 2 #type: int
World = 3 #type: int
## Construct a scene node.
# \param parent The parent of this node (if any). Only a root node should have None as a parent.
# \param visible Is the SceneNode (and thus, all its children) visible?
# \param name Name of the SceneNode.
def __init__(self, parent: Optional["SceneNode"] = None, visible: bool = True, name: str = "") -> None:
super().__init__() # Call super to make multiple inheritance work.
self._children = [] # type: List[SceneNode]
self._mesh_data = None # type: Optional[MeshData]
# Local transformation (from parent to local)
self._transformation = Matrix() # type: Matrix
# Convenience "components" of the transformation
self._position = Vector() # type: Vector
self._scale = Vector(1.0, 1.0, 1.0) # type: Vector
self._shear = Vector(0.0, 0.0, 0.0) # type: Vector
self._mirror = Vector(1.0, 1.0, 1.0) # type: Vector
self._orientation = Quaternion() # type: Quaternion
# World transformation (from root to local)
self._world_transformation = Matrix() # type: Matrix
# Convenience "components" of the world_transformation
self._derived_position = Vector() # type: Vector
self._derived_orientation = Quaternion() # type: Quaternion
self._derived_scale = Vector() # type: Vector
self._parent = parent # type: Optional[SceneNode]
# Can this SceneNode be modified in any way?
self._enabled = True # type: bool
# Can this SceneNode be selected in any way?
self._selectable = False # type: bool
# Should the AxisAlignedBoundingBox be re-calculated?
self._calculate_aabb = True # type: bool
# The AxisAligned bounding box.
self._aabb = None # type: Optional[AxisAlignedBox]
self._bounding_box_mesh = None # type: Optional[MeshData]
self._visible = visible # type: bool
self._name = name # type: str
self._decorators = [] # type: List[SceneNodeDecorator]
# Store custom settings to be compatible with Savitar SceneNode
self._settings = {} # type: Dict[str, Any]
## Signals
self.parentChanged.connect(self._onParentChanged)
if parent:
parent.addChild(self)
def __deepcopy__(self, memo: Dict[int, object]) -> "SceneNode":
copy = self.__class__()
copy.setTransformation(self.getLocalTransformation())
copy.setMeshData(self._mesh_data)
copy._visible = cast(bool, deepcopy(self._visible, memo))
copy._selectable = cast(bool, deepcopy(self._selectable, memo))
copy._name = cast(str, deepcopy(self._name, memo))
for decorator in self._decorators:
copy.addDecorator(cast(SceneNodeDecorator, deepcopy(decorator, memo)))
for child in self._children:
copy.addChild(cast(SceneNode, deepcopy(child, memo)))
self.calculateBoundingBoxMesh()
return copy
## Set the center position of this node.
# This is used to modify it's mesh data (and it's children) in such a way that they are centered.
# In most cases this means that we use the center of mass as center (which most objects don't use)
def setCenterPosition(self, center: Vector) -> None:
if self._mesh_data:
m = Matrix()
m.setByTranslation(-center)
self._mesh_data = self._mesh_data.getTransformed(m).set(center_position=center)
for child in self._children:
child.setCenterPosition(center)
## \brief Get the parent of this node. If the node has no parent, it is the root node.
# \returns SceneNode if it has a parent and None if it's the root node.
def getParent(self) -> Optional["SceneNode"]:
return self._parent
def getMirror(self) -> Vector:
return self._mirror
def setMirror(self, vector) -> None:
self._mirror = vector
## Get the MeshData of the bounding box
# \returns \type{MeshData} Bounding box mesh.
def getBoundingBoxMesh(self) -> Optional[MeshData]:
if self._bounding_box_mesh is None:
self.calculateBoundingBoxMesh()
return self._bounding_box_mesh
## (re)Calculate the bounding box mesh.
def calculateBoundingBoxMesh(self) -> None:
aabb = self.getBoundingBox()
if aabb:
bounding_box_mesh = MeshBuilder()
rtf = aabb.maximum
lbb = aabb.minimum
bounding_box_mesh.addVertex(rtf.x, rtf.y, rtf.z) # Right - Top - Front
bounding_box_mesh.addVertex(lbb.x, rtf.y, rtf.z) # Left - Top - Front
bounding_box_mesh.addVertex(lbb.x, rtf.y, rtf.z) # Left - Top - Front
bounding_box_mesh.addVertex(lbb.x, lbb.y, rtf.z) # Left - Bottom - Front
bounding_box_mesh.addVertex(lbb.x, lbb.y, rtf.z) # Left - Bottom - Front
bounding_box_mesh.addVertex(rtf.x, lbb.y, rtf.z) # Right - Bottom - Front
bounding_box_mesh.addVertex(rtf.x, lbb.y, rtf.z) # Right - Bottom - Front
bounding_box_mesh.addVertex(rtf.x, rtf.y, rtf.z) # Right - Top - Front
bounding_box_mesh.addVertex(rtf.x, rtf.y, lbb.z) # Right - Top - Back
bounding_box_mesh.addVertex(lbb.x, rtf.y, lbb.z) # Left - Top - Back
bounding_box_mesh.addVertex(lbb.x, rtf.y, lbb.z) # Left - Top - Back
bounding_box_mesh.addVertex(lbb.x, lbb.y, lbb.z) # Left - Bottom - Back
bounding_box_mesh.addVertex(lbb.x, lbb.y, lbb.z) # Left - Bottom - Back
bounding_box_mesh.addVertex(rtf.x, lbb.y, lbb.z) # Right - Bottom - Back
bounding_box_mesh.addVertex(rtf.x, lbb.y, lbb.z) # Right - Bottom - Back
bounding_box_mesh.addVertex(rtf.x, rtf.y, lbb.z) # Right - Top - Back
bounding_box_mesh.addVertex(rtf.x, rtf.y, rtf.z) # Right - Top - Front
bounding_box_mesh.addVertex(rtf.x, rtf.y, lbb.z) # Right - Top - Back
bounding_box_mesh.addVertex(lbb.x, rtf.y, rtf.z) # Left - Top - Front
bounding_box_mesh.addVertex(lbb.x, rtf.y, lbb.z) # Left - Top - Back
bounding_box_mesh.addVertex(lbb.x, lbb.y, rtf.z) # Left - Bottom - Front
bounding_box_mesh.addVertex(lbb.x, lbb.y, lbb.z) # Left - Bottom - Back
bounding_box_mesh.addVertex(rtf.x, lbb.y, rtf.z) # Right - Bottom - Front
bounding_box_mesh.addVertex(rtf.x, lbb.y, lbb.z) # Right - Bottom - Back
self._bounding_box_mesh = bounding_box_mesh.build()
## Return if the provided bbox collides with the bbox of this SceneNode
def collidesWithBbox(self, check_bbox: AxisAlignedBox) -> bool:
bbox = self.getBoundingBox()
if bbox is not None:
if check_bbox.intersectsBox(bbox) != AxisAlignedBox.IntersectionResult.FullIntersection:
return True
return False
## Handler for the ParentChanged signal
# \param node Node from which this event was triggered.
def _onParentChanged(self, node: Optional["SceneNode"]) -> None:
for child in self.getChildren():
child.parentChanged.emit(self)
## Signal for when a \type{SceneNodeDecorator} is added / removed.
decoratorsChanged = Signal()
## Add a SceneNodeDecorator to this SceneNode.
# \param \type{SceneNodeDecorator} decorator The decorator to add.
def addDecorator(self, decorator: SceneNodeDecorator) -> None:
if type(decorator) in [type(dec) for dec in self._decorators]:
Logger.log("w", "Unable to add the same decorator type (%s) to a SceneNode twice.", type(decorator))
return
try:
decorator.setNode(self)
except AttributeError:
Logger.logException("e", "Unable to add decorator.")
return
self._decorators.append(decorator)
self.decoratorsChanged.emit(self)
## Get all SceneNodeDecorators that decorate this SceneNode.
# \return list of all SceneNodeDecorators.
def getDecorators(self) -> List[SceneNodeDecorator]:
return self._decorators
## Get SceneNodeDecorators by type.
# \param dec_type type of decorator to return.
def getDecorator(self, dec_type: type) -> Optional[SceneNodeDecorator]:
for decorator in self._decorators:
if type(decorator) == dec_type:
return decorator
return None
## Remove all decorators
def removeDecorators(self):
for decorator in self._decorators:
decorator.clear()
self._decorators = []
self.decoratorsChanged.emit(self)
## Remove decorator by type.
# \param dec_type type of the decorator to remove.
def removeDecorator(self, dec_type: type) -> None:
for decorator in self._decorators:
if type(decorator) == dec_type:
decorator.clear()
self._decorators.remove(decorator)
self.decoratorsChanged.emit(self)
break
## Call a decoration of this SceneNode.
# SceneNodeDecorators add Decorations, which are callable functions.
# \param function The function to be called.
# \param *args
# \param **kwargs
def callDecoration(self, function: str, *args, **kwargs) -> Any:
for decorator in self._decorators:
if hasattr(decorator, function):
try:
return getattr(decorator, function)(*args, **kwargs)
except Exception as e:
Logger.logException("e", "Exception calling decoration %s: %s", str(function), str(e))
return None
## Does this SceneNode have a certain Decoration (as defined by a Decorator)
# \param \type{string} function the function to check for.
def hasDecoration(self, function: str) -> bool:
for decorator in self._decorators:
if hasattr(decorator, function):
return True
return False
def getName(self) -> str:
return self._name
def setName(self, name: str) -> None:
self._name = name
## How many nodes is this node removed from the root?
# \return |tupe{int} Steps from root (0 means it -is- the root).
def getDepth(self) -> int:
if self._parent is None:
return 0
return self._parent.getDepth() + 1
## \brief Set the parent of this object
# \param scene_node SceneNode that is the parent of this object.
def setParent(self, scene_node: Optional["SceneNode"]) -> None:
if self._parent:
self._parent.removeChild(self)
if scene_node:
scene_node.addChild(self)
## Emitted whenever the parent changes.
parentChanged = Signal()
## \brief Get the visibility of this node. The parents visibility overrides the visibility.
# TODO: Let renderer actually use the visibility to decide whether to render or not.
def isVisible(self) -> bool:
if self._parent is not None and self._visible:
return self._parent.isVisible()
else:
return self._visible
## Set the visibility of this SceneNode.
def setVisible(self, visible: bool) -> None:
self._visible = visible
## \brief Get the (original) mesh data from the scene node/object.
# \returns MeshData
def getMeshData(self) -> Optional[MeshData]:
return self._mesh_data
## \brief Get the transformed mesh data from the scene node/object, based on the transformation of scene nodes wrt root.
# If this node is a group, it will recursively concatenate all child nodes/objects.
# \returns MeshData
def getMeshDataTransformed(self) -> Optional[MeshData]:
return MeshData(vertices = self.getMeshDataTransformedVertices(), normals = self.getMeshDataTransformedNormals())
## \brief Get the transformed vertices from this scene node/object, based on the transformation of scene nodes wrt root.
# If this node is a group, it will recursively concatenate all child nodes/objects.
# \return numpy.ndarray
def getMeshDataTransformedVertices(self) -> numpy.ndarray:
transformed_vertices = None
if self.callDecoration("isGroup"):
for child in self._children:
tv = child.getMeshDataTransformedVertices()
if transformed_vertices is None:
transformed_vertices = tv
else:
transformed_vertices = numpy.concatenate((transformed_vertices, tv), axis = 0)
else:
if self._mesh_data:
transformed_vertices = self._mesh_data.getTransformed(self.getWorldTransformation()).getVertices()
return transformed_vertices
## \brief Get the transformed normals from this scene node/object, based on the transformation of scene nodes wrt root.
# If this node is a group, it will recursively concatenate all child nodes/objects.
# \return numpy.ndarray
def getMeshDataTransformedNormals(self) -> numpy.ndarray:
transformed_normals = None
if self.callDecoration("isGroup"):
for child in self._children:
tv = child.getMeshDataTransformedNormals()
if transformed_normals is None:
transformed_normals = tv
else:
transformed_normals = numpy.concatenate((transformed_normals, tv), axis = 0)
else:
if self._mesh_data:
transformed_normals = self._mesh_data.getTransformed(self.getWorldTransformation()).getNormals()
return transformed_normals
## \brief Set the mesh of this node/object
# \param mesh_data MeshData object
def setMeshData(self, mesh_data: Optional[MeshData]) -> None:
self._mesh_data = mesh_data
self._resetAABB()
self.meshDataChanged.emit(self)
## Emitted whenever the attached mesh data object changes.
meshDataChanged = Signal()
def _onMeshDataChanged(self) -> None:
self.meshDataChanged.emit(self)
## \brief Add a child to this node and set it's parent as this node.
# \params scene_node SceneNode to add.
def addChild(self, scene_node: "SceneNode") -> None:
if scene_node in self._children:
return
scene_node.transformationChanged.connect(self.transformationChanged)
scene_node.childrenChanged.connect(self.childrenChanged)
scene_node.meshDataChanged.connect(self.meshDataChanged)
self._children.append(scene_node)
self._resetAABB()
self.childrenChanged.emit(self)
if not scene_node._parent is self:
scene_node._parent = self
scene_node._transformChanged()
scene_node.parentChanged.emit(self)
## \brief remove a single child
# \param child Scene node that needs to be removed.
def removeChild(self, child: "SceneNode") -> None:
if child not in self._children:
return
child.transformationChanged.disconnect(self.transformationChanged)
child.childrenChanged.disconnect(self.childrenChanged)
child.meshDataChanged.disconnect(self.meshDataChanged)
self._children.remove(child)
child._parent = None
child._transformChanged()
child.parentChanged.emit(self)
self._resetAABB()
self.childrenChanged.emit(self)
## \brief Removes all children and its children's children.
def removeAllChildren(self) -> None:
for child in self._children:
child.removeAllChildren()
self.removeChild(child)
self.childrenChanged.emit(self)
## \brief Get the list of direct children
# \returns List of children
def getChildren(self) -> List["SceneNode"]:
return self._children
def hasChildren(self) -> bool:
return True if self._children else False
## \brief Get list of all children (including it's children children children etc.)
# \returns list ALl children in this 'tree'
def getAllChildren(self) -> List["SceneNode"]:
children = []
children.extend(self._children)
for child in self._children:
children.extend(child.getAllChildren())
return children
## \brief Emitted whenever the list of children of this object or any child object changes.
# \param object The object that triggered the change.
childrenChanged = Signal()
## \brief Computes and returns the transformation from world to local space.
# \returns 4x4 transformation matrix
def getWorldTransformation(self) -> Matrix:
if self._world_transformation is None:
self._updateWorldTransformation()
return self._world_transformation.copy()
## \brief Returns the local transformation with respect to its parent. (from parent to local)
# \retuns transformation 4x4 (homogenous) matrix
def getLocalTransformation(self) -> Matrix:
if self._transformation is None:
self._updateLocalTransformation()
return self._transformation.copy()
def setTransformation(self, transformation: Matrix):
self._transformation = transformation.copy() # Make a copy to ensure we never change the given transformation
self._transformChanged()
## Get the local orientation value.
def getOrientation(self) -> Quaternion:
return deepcopy(self._orientation)
def getWorldOrientation(self) -> Quaternion:
return deepcopy(self._derived_orientation)
## \brief Rotate the scene object (and thus its children) by given amount
#
# \param rotation \type{Quaternion} A quaternion indicating the amount of rotation.
# \param transform_space The space relative to which to rotate. Can be any one of the constants in SceneNode::TransformSpace.
def rotate(self, rotation: Quaternion, transform_space: int = TransformSpace.Local) -> None:
if not self._enabled:
return
orientation_matrix = rotation.toMatrix()
if transform_space == SceneNode.TransformSpace.Local:
self._transformation.multiply(orientation_matrix)
elif transform_space == SceneNode.TransformSpace.Parent:
self._transformation.preMultiply(orientation_matrix)
elif transform_space == SceneNode.TransformSpace.World:
self._transformation.multiply(self._world_transformation.getInverse())
self._transformation.multiply(orientation_matrix)
self._transformation.multiply(self._world_transformation)
self._transformChanged()
## Set the local orientation of this scene node.
#
# \param orientation \type{Quaternion} The new orientation of this scene node.
# \param transform_space The space relative to which to rotate. Can be Local or World from SceneNode::TransformSpace.
def setOrientation(self, orientation: Quaternion, transform_space: int = TransformSpace.Local) -> None:
if not self._enabled or orientation == self._orientation:
return
if transform_space == SceneNode.TransformSpace.World:
if self.getWorldOrientation() == orientation:
return
new_orientation = orientation * (self.getWorldOrientation() * self._orientation.getInverse()).invert()
orientation_matrix = new_orientation.toMatrix()
else: # Local
orientation_matrix = orientation.toMatrix()
euler_angles = orientation_matrix.getEuler()
new_transform_matrix = Matrix()
new_transform_matrix.compose(scale = self._scale, angles = euler_angles, translate = self._position, shear = self._shear)
self._transformation = new_transform_matrix
self._transformChanged()
## Get the local scaling value.
def getScale(self) -> Vector:
return self._scale
def getWorldScale(self) -> Vector:
return self._derived_scale
## Scale the scene object (and thus its children) by given amount
#
# \param scale \type{Vector} A Vector with three scale values
# \param transform_space The space relative to which to scale. Can be any one of the constants in SceneNode::TransformSpace.
def scale(self, scale: Vector, transform_space: int = TransformSpace.Local) -> None:
if not self._enabled:
return
scale_matrix = Matrix()
scale_matrix.setByScaleVector(scale)
if transform_space == SceneNode.TransformSpace.Local:
self._transformation.multiply(scale_matrix)
elif transform_space == SceneNode.TransformSpace.Parent:
self._transformation.preMultiply(scale_matrix)
elif transform_space == SceneNode.TransformSpace.World:
self._transformation.multiply(self._world_transformation.getInverse())
self._transformation.multiply(scale_matrix)
self._transformation.multiply(self._world_transformation)
self._transformChanged()
## Set the local scale value.
#
# \param scale \type{Vector} The new scale value of the scene node.
# \param transform_space The space relative to which to rotate. Can be Local or World from SceneNode::TransformSpace.
def setScale(self, scale: Vector, transform_space: int = TransformSpace.Local) -> None:
if not self._enabled or scale == self._scale:
return
if transform_space == SceneNode.TransformSpace.Local:
self.scale(scale / self._scale, SceneNode.TransformSpace.Local)
return
if transform_space == SceneNode.TransformSpace.World:
if self.getWorldScale() == scale:
return
self.scale(scale / self._scale, SceneNode.TransformSpace.World)
## Get the local position.
def getPosition(self) -> Vector:
return self._position
## Get the position of this scene node relative to the world.
def getWorldPosition(self) -> Vector:
return self._derived_position
## Translate the scene object (and thus its children) by given amount.
#
# \param translation \type{Vector} The amount to translate by.
# \param transform_space The space relative to which to translate. Can be any one of the constants in SceneNode::TransformSpace.
def translate(self, translation: Vector, transform_space: int = TransformSpace.Local) -> None:
if not self._enabled:
return
translation_matrix = Matrix()
translation_matrix.setByTranslation(translation)
if transform_space == SceneNode.TransformSpace.Local:
self._transformation.multiply(translation_matrix)
elif transform_space == SceneNode.TransformSpace.Parent:
self._transformation.preMultiply(translation_matrix)
elif transform_space == SceneNode.TransformSpace.World:
world_transformation = self._world_transformation.copy()
self._transformation.multiply(self._world_transformation.getInverse())
self._transformation.multiply(translation_matrix)
self._transformation.multiply(world_transformation)
self._transformChanged()
## Set the local position value.
#
# \param position The new position value of the SceneNode.
# \param transform_space The space relative to which to rotate. Can be Local or World from SceneNode::TransformSpace.
def setPosition(self, position: Vector, transform_space: int = TransformSpace.Local) -> None:
if not self._enabled or position == self._position:
return
if transform_space == SceneNode.TransformSpace.Local:
self.translate(position - self._position, SceneNode.TransformSpace.Parent)
if transform_space == SceneNode.TransformSpace.World:
if self.getWorldPosition() == position:
return
self.translate(position - self._derived_position, SceneNode.TransformSpace.World)
## Signal. Emitted whenever the transformation of this object or any child object changes.
# \param object The object that caused the change.
transformationChanged = Signal()
## Rotate this scene node in such a way that it is looking at target.
#
# \param target \type{Vector} The target to look at.
# \param up \type{Vector} The vector to consider up. Defaults to Vector.Unit_Y, i.e. (0, 1, 0).
def lookAt(self, target: Vector, up: Vector = Vector.Unit_Y) -> None:
if not self._enabled:
return
eye = self.getWorldPosition()
f = (target - eye).normalized()
up = up.normalized()
s = f.cross(up).normalized()
u = s.cross(f).normalized()
m = Matrix([
[ s.x, u.x, -f.x, 0.0],
[ s.y, u.y, -f.y, 0.0],
[ s.z, u.z, -f.z, 0.0],
[ 0.0, 0.0, 0.0, 1.0]
])
self.setOrientation(Quaternion.fromMatrix(m))
## Can be overridden by child nodes if they need to perform special rendering.
# If you need to handle rendering in a special way, for example for tool handles,
# you can override this method and render the node. Return True to prevent the
# view from rendering any attached mesh data.
#
# \param renderer The renderer object to use for rendering.
#
# \return False if the view should render this node, True if we handle our own rendering.
def render(self, renderer) -> bool:
return False
## Get whether this SceneNode is enabled, that is, it can be modified in any way.
def isEnabled(self) -> bool:
if self._parent is not None and self._enabled:
return self._parent.isEnabled()
else:
return self._enabled
## Set whether this SceneNode is enabled.
# \param enable True if this object should be enabled, False if not.
# \sa isEnabled
def setEnabled(self, enable: bool) -> None:
self._enabled = enable
## Get whether this SceneNode can be selected.
#
# \note This will return false if isEnabled() returns false.
def isSelectable(self) -> bool:
return self._enabled and self._selectable
## Set whether this SceneNode can be selected.
#
# \param select True if this SceneNode should be selectable, False if not.
def setSelectable(self, select: bool) -> None:
self._selectable = select
## Get the bounding box of this node and its children.
def getBoundingBox(self) -> Optional[AxisAlignedBox]:
if not self._calculate_aabb:
return None
if self._aabb is None:
self._calculateAABB()
return self._aabb
## Set whether or not to calculate the bounding box for this node.
#
# \param calculate True if the bounding box should be calculated, False if not.
def setCalculateBoundingBox(self, calculate: bool) -> None:
self._calculate_aabb = calculate
boundingBoxChanged = Signal()
def getShear(self) -> Vector:
return self._shear
def getSetting(self, key: str, default_value: str = "") -> str:
return self._settings.get(key, default_value)
def setSetting(self, key: str, value: str) -> None:
self._settings[key] = value
## private:
def _transformChanged(self) -> None:
self._updateTransformation()
self._resetAABB()
self.transformationChanged.emit(self)
for child in self._children:
child._transformChanged()
def _updateLocalTransformation(self):
translation, euler_angle_matrix, scale, shear = self._transformation.decompose()
self._position = translation
self._scale = scale
self._shear = shear
orientation = Quaternion()
orientation.setByMatrix(euler_angle_matrix)
self._orientation = orientation
def _updateWorldTransformation(self):
if self._parent:
self._world_transformation = self._parent.getWorldTransformation().multiply(self._transformation)
else:
self._world_transformation = self._transformation
world_translation, world_euler_angle_matrix, world_scale, world_shear = self._world_transformation.decompose()
self._derived_position = world_translation
self._derived_scale = world_scale
self._derived_orientation.setByMatrix(world_euler_angle_matrix)
def _updateTransformation(self) -> None:
self._updateLocalTransformation()
self._updateWorldTransformation()
def _resetAABB(self) -> None:
if not self._calculate_aabb:
return
self._aabb = None
self._bounding_box_mesh = None
if self._parent:
self._parent._resetAABB()
self.boundingBoxChanged.emit()
def _calculateAABB(self) -> None:
if self._mesh_data:
aabb = self._mesh_data.getExtents(self.getWorldTransformation())
else: # If there is no mesh_data, use a boundingbox that encompasses the local (0,0,0)
position = self.getWorldPosition()
aabb = AxisAlignedBox(minimum = position, maximum = position)
for child in self._children:
if aabb is None:
aabb = child.getBoundingBox()
else:
aabb = aabb + child.getBoundingBox()
self._aabb = aabb
## String output for debugging.
def __str__(self) -> str:
name = self._name if self._name != "" else hex(id(self))
return "<" + self.__class__.__qualname__ + " object: '" + name + "'>"
class SceneNode:
class TransformSpace:
Local = 1 #type: int
Parent = 2 #type: int
World = 3 #type: int
## Construct a scene node.
# \param parent The parent of this node (if any). Only a root node should have None as a parent.
# \param visible Is the SceneNode (and thus, all its children) visible?
# \param name Name of the SceneNode.
def __init__(self, parent: Optional["SceneNode"] = None, visible: bool = True, name: str = "") -> None:
super().__init__() # Call super to make multiple inheritance work.
self._children = [] # type: List[SceneNode]
self._mesh_data = None # type: Optional[MeshData]
# Local transformation (from parent to local)
self._transformation = Matrix() # type: Matrix
# Convenience "components" of the transformation
self._position = Vector() # type: Vector
self._scale = Vector(1.0, 1.0, 1.0) # type: Vector
self._shear = Vector(0.0, 0.0, 0.0) # type: Vector
self._mirror = Vector(1.0, 1.0, 1.0) # type: Vector
self._orientation = Quaternion() # type: Quaternion
# World transformation (from root to local)
self._world_transformation = Matrix() # type: Matrix
# Convenience "components" of the world_transformation
self._derived_position = Vector() # type: Vector
self._derived_orientation = Quaternion() # type: Quaternion
self._derived_scale = Vector() # type: Vector
self._parent = parent # type: Optional[SceneNode]
# Can this SceneNode be modified in any way?
self._enabled = True # type: bool
# Can this SceneNode be selected in any way?
self._selectable = False # type: bool
# Should the AxisAlignedBoundingBox be re-calculated?
self._calculate_aabb = True # type: bool
# The AxisAligned bounding box.
self._aabb = None # type: Optional[AxisAlignedBox]
self._bounding_box_mesh = None # type: Optional[MeshData]
self._visible = visible # type: bool
self._name = name # type: str
self._decorators = [] # type: List[SceneNodeDecorator]
# Store custom settings to be compatible with Savitar SceneNode
self._settings = {} # type: Dict[str, Any]
## Signals
self.parentChanged.connect(self._onParentChanged)
if parent:
parent.addChild(self)
def __deepcopy__(self, memo: Dict[int, object]) -> "SceneNode":
copy = self.__class__()
copy.setTransformation(self.getLocalTransformation())
copy.setMeshData(self._mesh_data)
copy._visible = cast(bool, deepcopy(self._visible, memo))
copy._selectable = cast(bool, deepcopy(self._selectable, memo))
copy._name = cast(str, deepcopy(self._name, memo))
for decorator in self._decorators:
copy.addDecorator(cast(SceneNodeDecorator, deepcopy(decorator, memo)))
for child in self._children:
copy.addChild(cast(SceneNode, deepcopy(child, memo)))
self.calculateBoundingBoxMesh()
return copy
## Set the center position of this node.
# This is used to modify it's mesh data (and it's children) in such a way that they are centered.
# In most cases this means that we use the center of mass as center (which most objects don't use)
def setCenterPosition(self, center: Vector) -> None:
if self._mesh_data:
m = Matrix()
m.setByTranslation(-center)
self._mesh_data = self._mesh_data.getTransformed(m).set(center_position=center)
for child in self._children:
child.setCenterPosition(center)
## \brief Get the parent of this node. If the node has no parent, it is the root node.
# \returns SceneNode if it has a parent and None if it's the root node.
def getParent(self) -> Optional["SceneNode"]:
return self._parent
def getMirror(self) -> Vector:
return self._mirror
def setMirror(self, vector) -> None:
self._mirror = vector
## Get the MeshData of the bounding box
# \returns \type{MeshData} Bounding box mesh.
def getBoundingBoxMesh(self) -> Optional[MeshData]:
if self._bounding_box_mesh is None:
self.calculateBoundingBoxMesh()
return self._bounding_box_mesh
## (re)Calculate the bounding box mesh.
def calculateBoundingBoxMesh(self) -> None:
aabb = self.getBoundingBox()
if aabb:
bounding_box_mesh = MeshBuilder()
rtf = aabb.maximum
lbb = aabb.minimum
bounding_box_mesh.addVertex(rtf.x, rtf.y, rtf.z) # Right - Top - Front
bounding_box_mesh.addVertex(lbb.x, rtf.y, rtf.z) # Left - Top - Front
bounding_box_mesh.addVertex(lbb.x, rtf.y, rtf.z) # Left - Top - Front
bounding_box_mesh.addVertex(lbb.x, lbb.y, rtf.z) # Left - Bottom - Front
bounding_box_mesh.addVertex(lbb.x, lbb.y, rtf.z) # Left - Bottom - Front
bounding_box_mesh.addVertex(rtf.x, lbb.y, rtf.z) # Right - Bottom - Front
bounding_box_mesh.addVertex(rtf.x, lbb.y, rtf.z) # Right - Bottom - Front
bounding_box_mesh.addVertex(rtf.x, rtf.y, rtf.z) # Right - Top - Front
bounding_box_mesh.addVertex(rtf.x, rtf.y, lbb.z) # Right - Top - Back
bounding_box_mesh.addVertex(lbb.x, rtf.y, lbb.z) # Left - Top - Back
bounding_box_mesh.addVertex(lbb.x, rtf.y, lbb.z) # Left - Top - Back
bounding_box_mesh.addVertex(lbb.x, lbb.y, lbb.z) # Left - Bottom - Back
bounding_box_mesh.addVertex(lbb.x, lbb.y, lbb.z) # Left - Bottom - Back
bounding_box_mesh.addVertex(rtf.x, lbb.y, lbb.z) # Right - Bottom - Back
bounding_box_mesh.addVertex(rtf.x, lbb.y, lbb.z) # Right - Bottom - Back
bounding_box_mesh.addVertex(rtf.x, rtf.y, lbb.z) # Right - Top - Back
bounding_box_mesh.addVertex(rtf.x, rtf.y, rtf.z) # Right - Top - Front
bounding_box_mesh.addVertex(rtf.x, rtf.y, lbb.z) # Right - Top - Back
bounding_box_mesh.addVertex(lbb.x, rtf.y, rtf.z) # Left - Top - Front
bounding_box_mesh.addVertex(lbb.x, rtf.y, lbb.z) # Left - Top - Back
bounding_box_mesh.addVertex(lbb.x, lbb.y, rtf.z) # Left - Bottom - Front
bounding_box_mesh.addVertex(lbb.x, lbb.y, lbb.z) # Left - Bottom - Back
bounding_box_mesh.addVertex(rtf.x, lbb.y, rtf.z) # Right - Bottom - Front
bounding_box_mesh.addVertex(rtf.x, lbb.y, lbb.z) # Right - Bottom - Back
self._bounding_box_mesh = bounding_box_mesh.build()
## Handler for the ParentChanged signal
# \param node Node from which this event was triggered.
def _onParentChanged(self, node: Optional["SceneNode"]) -> None:
for child in self.getChildren():
child.parentChanged.emit(self)
## Signal for when a \type{SceneNodeDecorator} is added / removed.
decoratorsChanged = Signal()
## Add a SceneNodeDecorator to this SceneNode.
# \param \type{SceneNodeDecorator} decorator The decorator to add.
def addDecorator(self, decorator: SceneNodeDecorator) -> None:
if type(decorator) in [type(dec) for dec in self._decorators]:
Logger.log("w", "Unable to add the same decorator type (%s) to a SceneNode twice.", type(decorator))
return
try:
decorator.setNode(self)
except AttributeError:
Logger.logException("e", "Unable to add decorator.")
return
self._decorators.append(decorator)
self.decoratorsChanged.emit(self)
## Get all SceneNodeDecorators that decorate this SceneNode.
# \return list of all SceneNodeDecorators.
def getDecorators(self) -> List[SceneNodeDecorator]:
return self._decorators
## Get SceneNodeDecorators by type.
# \param dec_type type of decorator to return.
def getDecorator(self, dec_type: type) -> Optional[SceneNodeDecorator]:
for decorator in self._decorators:
if type(decorator) == dec_type:
return decorator
return None
## Remove all decorators
def removeDecorators(self):
for decorator in self._decorators:
decorator.clear()
self._decorators = []
self.decoratorsChanged.emit(self)
## Remove decorator by type.
# \param dec_type type of the decorator to remove.
def removeDecorator(self, dec_type: type) -> None:
for decorator in self._decorators:
if type(decorator) == dec_type:
decorator.clear()
self._decorators.remove(decorator)
self.decoratorsChanged.emit(self)
break
## Call a decoration of this SceneNode.
# SceneNodeDecorators add Decorations, which are callable functions.
# \param function The function to be called.
# \param *args
# \param **kwargs
def callDecoration(self, function: str, *args, **kwargs) -> Any:
for decorator in self._decorators:
if hasattr(decorator, function):
try:
return getattr(decorator, function)(*args, **kwargs)
except Exception as e:
Logger.logException("e", "Exception calling decoration %s: %s", str(function), str(e))
return None
## Does this SceneNode have a certain Decoration (as defined by a Decorator)
# \param \type{string} function the function to check for.
def hasDecoration(self, function: str) -> bool:
for decorator in self._decorators:
if hasattr(decorator, function):
return True
return False
def getName(self) -> str:
return self._name
def setName(self, name: str) -> None:
self._name = name
## How many nodes is this node removed from the root?
# \return |tupe{int} Steps from root (0 means it -is- the root).
def getDepth(self) -> int:
if self._parent is None:
return 0
return self._parent.getDepth() + 1
## \brief Set the parent of this object
# \param scene_node SceneNode that is the parent of this object.
def setParent(self, scene_node: Optional["SceneNode"]) -> None:
if self._parent:
self._parent.removeChild(self)
if scene_node:
scene_node.addChild(self)
## Emitted whenever the parent changes.
parentChanged = Signal()
## \brief Get the visibility of this node. The parents visibility overrides the visibility.
# TODO: Let renderer actually use the visibility to decide whether to render or not.
def isVisible(self) -> bool:
if self._parent is not None and self._visible:
return self._parent.isVisible()
else:
return self._visible
## Set the visibility of this SceneNode.
def setVisible(self, visible: bool) -> None:
self._visible = visible
## \brief Get the (original) mesh data from the scene node/object.
# \returns MeshData
def getMeshData(self) -> Optional[MeshData]:
return self._mesh_data
## \brief Get the transformed mesh data from the scene node/object, based on the transformation of scene nodes wrt root.
# If this node is a group, it will recursively concatenate all child nodes/objects.
# \returns MeshData
def getMeshDataTransformed(self) -> Optional[MeshData]:
return MeshData(vertices = self.getMeshDataTransformedVertices(), normals = self.getMeshDataTransformedNormals())
## \brief Get the transformed vertices from this scene node/object, based on the transformation of scene nodes wrt root.
# If this node is a group, it will recursively concatenate all child nodes/objects.
# \return numpy.ndarray
def getMeshDataTransformedVertices(self) -> numpy.ndarray:
transformed_vertices = None
if self.callDecoration("isGroup"):
for child in self._children:
tv = child.getMeshDataTransformedVertices()
if transformed_vertices is None:
transformed_vertices = tv
else:
transformed_vertices = numpy.concatenate((transformed_vertices, tv), axis = 0)
else:
if self._mesh_data:
transformed_vertices = self._mesh_data.getTransformed(self.getWorldTransformation()).getVertices()
return transformed_vertices
## \brief Get the transformed normals from this scene node/object, based on the transformation of scene nodes wrt root.
# If this node is a group, it will recursively concatenate all child nodes/objects.
# \return numpy.ndarray
def getMeshDataTransformedNormals(self) -> numpy.ndarray:
transformed_normals = None
if self.callDecoration("isGroup"):
for child in self._children:
tv = child.getMeshDataTransformedNormals()
if transformed_normals is None:
transformed_normals = tv
else:
transformed_normals = numpy.concatenate((transformed_normals, tv), axis = 0)
else:
if self._mesh_data:
transformed_normals = self._mesh_data.getTransformed(self.getWorldTransformation()).getNormals()
return transformed_normals
## \brief Set the mesh of this node/object
# \param mesh_data MeshData object
def setMeshData(self, mesh_data: Optional[MeshData]) -> None:
self._mesh_data = mesh_data
self._resetAABB()
self.meshDataChanged.emit(self)
## Emitted whenever the attached mesh data object changes.
meshDataChanged = Signal()
def _onMeshDataChanged(self) -> None:
self.meshDataChanged.emit(self)
## \brief Add a child to this node and set it's parent as this node.
# \params scene_node SceneNode to add.
def addChild(self, scene_node: "SceneNode") -> None:
if scene_node in self._children:
return
scene_node.transformationChanged.connect(self.transformationChanged)
scene_node.childrenChanged.connect(self.childrenChanged)
scene_node.meshDataChanged.connect(self.meshDataChanged)
self._children.append(scene_node)
self._resetAABB()
self.childrenChanged.emit(self)
if not scene_node._parent is self:
scene_node._parent = self
scene_node._transformChanged()
scene_node.parentChanged.emit(self)
## \brief remove a single child
# \param child Scene node that needs to be removed.
def removeChild(self, child: "SceneNode") -> None:
if child not in self._children:
return
child.transformationChanged.disconnect(self.transformationChanged)
child.childrenChanged.disconnect(self.childrenChanged)
child.meshDataChanged.disconnect(self.meshDataChanged)
self._children.remove(child)
child._parent = None
child._transformChanged()
child.parentChanged.emit(self)
self._resetAABB()
self.childrenChanged.emit(self)
## \brief Removes all children and its children's children.
def removeAllChildren(self) -> None:
for child in self._children:
child.removeAllChildren()
self.removeChild(child)
self.childrenChanged.emit(self)
## \brief Get the list of direct children
# \returns List of children
def getChildren(self) -> List["SceneNode"]:
return self._children
def hasChildren(self) -> bool:
return True if self._children else False
## \brief Get list of all children (including it's children children children etc.)
# \returns list ALl children in this 'tree'
def getAllChildren(self) -> List["SceneNode"]:
children = []
children.extend(self._children)
for child in self._children:
children.extend(child.getAllChildren())
return children
## \brief Emitted whenever the list of children of this object or any child object changes.
# \param object The object that triggered the change.
childrenChanged = Signal()
## \brief Computes and returns the transformation from world to local space.
# \returns 4x4 transformation matrix
def getWorldTransformation(self) -> Matrix:
if self._world_transformation is None:
self._updateWorldTransformation()
return self._world_transformation.copy()
## \brief Returns the local transformation with respect to its parent. (from parent to local)
# \retuns transformation 4x4 (homogenous) matrix
def getLocalTransformation(self) -> Matrix:
if self._transformation is None:
self._updateLocalTransformation()
return self._transformation.copy()
def setTransformation(self, transformation: Matrix):
self._transformation = transformation.copy() # Make a copy to ensure we never change the given transformation
self._transformChanged()
## Get the local orientation value.
def getOrientation(self) -> Quaternion:
return deepcopy(self._orientation)
def getWorldOrientation(self) -> Quaternion:
return deepcopy(self._derived_orientation)
## \brief Rotate the scene object (and thus its children) by given amount
#
# \param rotation \type{Quaternion} A quaternion indicating the amount of rotation.
# \param transform_space The space relative to which to rotate. Can be any one of the constants in SceneNode::TransformSpace.
def rotate(self, rotation: Quaternion, transform_space: int = TransformSpace.Local) -> None:
if not self._enabled:
return
orientation_matrix = rotation.toMatrix()
if transform_space == SceneNode.TransformSpace.Local:
self._transformation.multiply(orientation_matrix)
elif transform_space == SceneNode.TransformSpace.Parent:
self._transformation.preMultiply(orientation_matrix)
elif transform_space == SceneNode.TransformSpace.World:
self._transformation.multiply(self._world_transformation.getInverse())
self._transformation.multiply(orientation_matrix)
self._transformation.multiply(self._world_transformation)
self._transformChanged()
## Set the local orientation of this scene node.
#
# \param orientation \type{Quaternion} The new orientation of this scene node.
# \param transform_space The space relative to which to rotate. Can be Local or World from SceneNode::TransformSpace.
def setOrientation(self, orientation: Quaternion, transform_space: int = TransformSpace.Local) -> None:
if not self._enabled or orientation == self._orientation:
return
if transform_space == SceneNode.TransformSpace.World:
if self.getWorldOrientation() == orientation:
return
new_orientation = orientation * (self.getWorldOrientation() * self._orientation.getInverse()).invert()
orientation_matrix = new_orientation.toMatrix()
else: # Local
orientation_matrix = orientation.toMatrix()
euler_angles = orientation_matrix.getEuler()
new_transform_matrix = Matrix()
new_transform_matrix.compose(scale = self._scale, angles = euler_angles, translate = self._position, shear = self._shear)
self._transformation = new_transform_matrix
self._transformChanged()
## Get the local scaling value.
def getScale(self) -> Vector:
return self._scale
def getWorldScale(self) -> Vector:
return self._derived_scale
## Scale the scene object (and thus its children) by given amount
#
# \param scale \type{Vector} A Vector with three scale values
# \param transform_space The space relative to which to scale. Can be any one of the constants in SceneNode::TransformSpace.
def scale(self, scale: Vector, transform_space: int = TransformSpace.Local) -> None:
if not self._enabled:
return
scale_matrix = Matrix()
scale_matrix.setByScaleVector(scale)
if transform_space == SceneNode.TransformSpace.Local:
self._transformation.multiply(scale_matrix)
elif transform_space == SceneNode.TransformSpace.Parent:
self._transformation.preMultiply(scale_matrix)
elif transform_space == SceneNode.TransformSpace.World:
self._transformation.multiply(self._world_transformation.getInverse())
self._transformation.multiply(scale_matrix)
self._transformation.multiply(self._world_transformation)
self._transformChanged()
## Set the local scale value.
#
# \param scale \type{Vector} The new scale value of the scene node.
# \param transform_space The space relative to which to rotate. Can be Local or World from SceneNode::TransformSpace.
def setScale(self, scale: Vector, transform_space: int = TransformSpace.Local) -> None:
if not self._enabled or scale == self._scale:
return
if transform_space == SceneNode.TransformSpace.Local:
self.scale(scale / self._scale, SceneNode.TransformSpace.Local)
return
if transform_space == SceneNode.TransformSpace.World:
if self.getWorldScale() == scale:
return
self.scale(scale / self._scale, SceneNode.TransformSpace.World)
## Get the local position.
def getPosition(self) -> Vector:
return self._position
## Get the position of this scene node relative to the world.
def getWorldPosition(self) -> Vector:
return self._derived_position
## Translate the scene object (and thus its children) by given amount.
#
# \param translation \type{Vector} The amount to translate by.
# \param transform_space The space relative to which to translate. Can be any one of the constants in SceneNode::TransformSpace.
def translate(self, translation: Vector, transform_space: int = TransformSpace.Local) -> None:
if not self._enabled:
return
translation_matrix = Matrix()
translation_matrix.setByTranslation(translation)
if transform_space == SceneNode.TransformSpace.Local:
self._transformation.multiply(translation_matrix)
elif transform_space == SceneNode.TransformSpace.Parent:
self._transformation.preMultiply(translation_matrix)
elif transform_space == SceneNode.TransformSpace.World:
world_transformation = self._world_transformation.copy()
self._transformation.multiply(self._world_transformation.getInverse())
self._transformation.multiply(translation_matrix)
self._transformation.multiply(world_transformation)
self._transformChanged()
## Set the local position value.
#
# \param position The new position value of the SceneNode.
# \param transform_space The space relative to which to rotate. Can be Local or World from SceneNode::TransformSpace.
def setPosition(self, position: Vector, transform_space: int = TransformSpace.Local) -> None:
if not self._enabled or position == self._position:
return
if transform_space == SceneNode.TransformSpace.Local:
self.translate(position - self._position, SceneNode.TransformSpace.Parent)
if transform_space == SceneNode.TransformSpace.World:
if self.getWorldPosition() == position:
return
self.translate(position - self._derived_position, SceneNode.TransformSpace.World)
## Signal. Emitted whenever the transformation of this object or any child object changes.
# \param object The object that caused the change.
transformationChanged = Signal()
## Rotate this scene node in such a way that it is looking at target.
#
# \param target \type{Vector} The target to look at.
# \param up \type{Vector} The vector to consider up. Defaults to Vector.Unit_Y, i.e. (0, 1, 0).
def lookAt(self, target: Vector, up: Vector = Vector.Unit_Y) -> None:
if not self._enabled:
return
eye = self.getWorldPosition()
f = (target - eye).normalized()
up = up.normalized()
s = f.cross(up).normalized()
u = s.cross(f).normalized()
m = Matrix([
[ s.x, u.x, -f.x, 0.0],
[ s.y, u.y, -f.y, 0.0],
[ s.z, u.z, -f.z, 0.0],
[ 0.0, 0.0, 0.0, 1.0]
])
self.setOrientation(Quaternion.fromMatrix(m))
## Can be overridden by child nodes if they need to perform special rendering.
# If you need to handle rendering in a special way, for example for tool handles,
# you can override this method and render the node. Return True to prevent the
# view from rendering any attached mesh data.
#
# \param renderer The renderer object to use for rendering.
#
# \return False if the view should render this node, True if we handle our own rendering.
def render(self, renderer) -> bool:
return False
## Get whether this SceneNode is enabled, that is, it can be modified in any way.
def isEnabled(self) -> bool:
if self._parent is not None and self._enabled:
return self._parent.isEnabled()
else:
return self._enabled
## Set whether this SceneNode is enabled.
# \param enable True if this object should be enabled, False if not.
# \sa isEnabled
def setEnabled(self, enable: bool) -> None:
self._enabled = enable
## Get whether this SceneNode can be selected.
#
# \note This will return false if isEnabled() returns false.
def isSelectable(self) -> bool:
return self._enabled and self._selectable
## Set whether this SceneNode can be selected.
#
# \param select True if this SceneNode should be selectable, False if not.
def setSelectable(self, select: bool) -> None:
self._selectable = select
## Get the bounding box of this node and its children.
def getBoundingBox(self) -> Optional[AxisAlignedBox]:
if not self._calculate_aabb:
return None
if self._aabb is None:
self._calculateAABB()
return self._aabb
## Set whether or not to calculate the bounding box for this node.
#
# \param calculate True if the bounding box should be calculated, False if not.
def setCalculateBoundingBox(self, calculate: bool) -> None:
self._calculate_aabb = calculate
boundingBoxChanged = Signal()
def getShear(self) -> Vector:
return self._shear
def getSetting(self, key: str, default_value: str = "") -> str:
return self._settings.get(key, default_value)
def setSetting(self, key: str, value: str) -> None:
self._settings[key] = value
## private:
def _transformChanged(self) -> None:
self._updateTransformation()
self._resetAABB()
self.transformationChanged.emit(self)
for child in self._children:
child._transformChanged()
def _updateLocalTransformation(self):
translation, euler_angle_matrix, scale, shear = self._transformation.decompose()
self._position = translation
self._scale = scale
self._shear = shear
orientation = Quaternion()
orientation.setByMatrix(euler_angle_matrix)
self._orientation = orientation
def _updateWorldTransformation(self):
if self._parent:
self._world_transformation = self._parent.getWorldTransformation().multiply(self._transformation)
else:
self._world_transformation = self._transformation
world_translation, world_euler_angle_matrix, world_scale, world_shear = self._world_transformation.decompose()
self._derived_position = world_translation
self._derived_scale = world_scale
self._derived_orientation.setByMatrix(world_euler_angle_matrix)
def _updateTransformation(self) -> None:
self._updateLocalTransformation()
self._updateWorldTransformation()
def _resetAABB(self) -> None:
if not self._calculate_aabb:
return
self._aabb = None
self._bounding_box_mesh = None
if self._parent:
self._parent._resetAABB()
self.boundingBoxChanged.emit()
def _calculateAABB(self) -> None:
if self._mesh_data:
aabb = self._mesh_data.getExtents(self.getWorldTransformation())
else: # If there is no mesh_data, use a boundingbox that encompasses the local (0,0,0)
position = self.getWorldPosition()
aabb = AxisAlignedBox(minimum = position, maximum = position)
for child in self._children:
if aabb is None:
aabb = child.getBoundingBox()
else:
aabb = aabb + child.getBoundingBox()
self._aabb = aabb
## String output for debugging.
def __str__(self) -> str:
name = self._name if self._name != "" else hex(id(self))
return "<" + self.__class__.__qualname__ + " object: '" + name + "'>"
def setTransformation(self, transformation: Matrix):
self._transformation = transformation.copy() # Make a copy to ensure we never change the given transformation
self._transformChanged()
class SceneNode:
"""A scene node object.
These objects can hold a mesh and multiple children. Each node has a transformation matrix
that maps it it's parents space to the local space (it's inverse maps local space to parent).
SceneNodes can be "Decorated" by adding SceneNodeDecorator objects.
These decorators can add functionality to scene nodes.
:sa SceneNodeDecorator
:todo Add unit testing
"""
class TransformSpace:
Local = 1 #type: int
Parent = 2 #type: int
World = 3 #type: int
def __init__(self,
parent: Optional["SceneNode"] = None,
visible: bool = True,
name: str = "",
node_id: str = "") -> None:
"""Construct a scene node.
:param parent: The parent of this node (if any). Only a root node should have None as a parent.
:param visible: Is the SceneNode (and thus, all its children) visible?
:param name: Name of the SceneNode.
"""
super().__init__() # Call super to make multiple inheritance work.
self._children = [] # type: List[SceneNode]
self._mesh_data = None # type: Optional[MeshData]
self.metadata = {} # type: Dict[str, Any]
# Local transformation (from parent to local)
self._transformation = Matrix() # type: Matrix
# Convenience "components" of the transformation
self._position = Vector() # type: Vector
self._scale = Vector(1.0, 1.0, 1.0) # type: Vector
self._shear = Vector(0.0, 0.0, 0.0) # type: Vector
self._mirror = Vector(1.0, 1.0, 1.0) # type: Vector
self._orientation = Quaternion() # type: Quaternion
# World transformation (from root to local)
self._world_transformation = Matrix() # type: Matrix
# This is used for rendering. Since we don't want to recompute it every time, we cache it in the node
self._cached_normal_matrix = Matrix()
# Convenience "components" of the world_transformation
self._derived_position = Vector() # type: Vector
self._derived_orientation = Quaternion() # type: Quaternion
self._derived_scale = Vector() # type: Vector
self._parent = parent # type: Optional[SceneNode]
# Can this SceneNode be modified in any way?
self._enabled = True # type: bool
# Can this SceneNode be selected in any way?
self._selectable = False # type: bool
# Should the AxisAlignedBoundingBox be re-calculated?
self._calculate_aabb = True # type: bool
# The AxisAligned bounding box.
self._aabb = None # type: Optional[AxisAlignedBox]
self._bounding_box_mesh = None # type: Optional[MeshData]
self._visible = visible # type: bool
self._name = name # type: str
self._id = node_id # type: str
self._decorators = [] # type: List[SceneNodeDecorator]
self.source_mime_type = None # type: Optional[MimeType] # MIME type of the source file this node was created from.
# Store custom settings to be compatible with Savitar SceneNode
self._settings = {} # type: Dict[str, Any]
## Signals
self.parentChanged.connect(self._onParentChanged)
if parent:
parent.addChild(self)
def __deepcopy__(self, memo: Dict[int, object]) -> "SceneNode":
copy = self.__class__()
copy.setTransformation(self.getLocalTransformation())
copy.setMeshData(self._mesh_data)
copy._visible = cast(bool, deepcopy(self._visible, memo))
copy._selectable = cast(bool, deepcopy(self._selectable, memo))
copy._name = cast(str, deepcopy(self._name, memo))
for decorator in self._decorators:
copy.addDecorator(
cast(SceneNodeDecorator, deepcopy(decorator, memo)))
for child in self._children:
copy.addChild(cast(SceneNode, deepcopy(child, memo)))
self.calculateBoundingBoxMesh()
return copy
def setCenterPosition(self, center: Vector) -> None:
"""Set the center position of this node.
This is used to modify it's mesh data (and it's children) in such a way that they are centered.
In most cases this means that we use the center of mass as center (which most objects don't use)
"""
if self._mesh_data:
m = Matrix()
m.setByTranslation(-center)
self._mesh_data = self._mesh_data.getTransformed(m).set(
center_position=center)
for child in self._children:
child.setCenterPosition(center)
def getParent(self) -> Optional["SceneNode"]:
"""Get the parent of this node.
If the node has no parent, it is the root node.
:returns: SceneNode if it has a parent and None if it's the root node.
"""
return self._parent
def getMirror(self) -> Vector:
return self._mirror
def setMirror(self, vector) -> None:
self._mirror = vector
def getBoundingBoxMesh(self) -> Optional[MeshData]:
"""Get the MeshData of the bounding box
:returns: :type{MeshData} Bounding box mesh.
"""
if self._bounding_box_mesh is None:
self.calculateBoundingBoxMesh()
return self._bounding_box_mesh
def calculateBoundingBoxMesh(self) -> None:
"""(re)Calculate the bounding box mesh."""
aabb = self.getBoundingBox()
if aabb:
bounding_box_mesh = MeshBuilder()
rtf = aabb.maximum
lbb = aabb.minimum
bounding_box_mesh.addVertex(rtf.x, rtf.y,
rtf.z) # Right - Top - Front
bounding_box_mesh.addVertex(lbb.x, rtf.y,
rtf.z) # Left - Top - Front
bounding_box_mesh.addVertex(lbb.x, rtf.y,
rtf.z) # Left - Top - Front
bounding_box_mesh.addVertex(lbb.x, lbb.y,
rtf.z) # Left - Bottom - Front
bounding_box_mesh.addVertex(lbb.x, lbb.y,
rtf.z) # Left - Bottom - Front
bounding_box_mesh.addVertex(rtf.x, lbb.y,
rtf.z) # Right - Bottom - Front
bounding_box_mesh.addVertex(rtf.x, lbb.y,
rtf.z) # Right - Bottom - Front
bounding_box_mesh.addVertex(rtf.x, rtf.y,
rtf.z) # Right - Top - Front
bounding_box_mesh.addVertex(rtf.x, rtf.y,
lbb.z) # Right - Top - Back
bounding_box_mesh.addVertex(lbb.x, rtf.y,
lbb.z) # Left - Top - Back
bounding_box_mesh.addVertex(lbb.x, rtf.y,
lbb.z) # Left - Top - Back
bounding_box_mesh.addVertex(lbb.x, lbb.y,
lbb.z) # Left - Bottom - Back
bounding_box_mesh.addVertex(lbb.x, lbb.y,
lbb.z) # Left - Bottom - Back
bounding_box_mesh.addVertex(rtf.x, lbb.y,
lbb.z) # Right - Bottom - Back
bounding_box_mesh.addVertex(rtf.x, lbb.y,
lbb.z) # Right - Bottom - Back
bounding_box_mesh.addVertex(rtf.x, rtf.y,
lbb.z) # Right - Top - Back
bounding_box_mesh.addVertex(rtf.x, rtf.y,
rtf.z) # Right - Top - Front
bounding_box_mesh.addVertex(rtf.x, rtf.y,
lbb.z) # Right - Top - Back
bounding_box_mesh.addVertex(lbb.x, rtf.y,
rtf.z) # Left - Top - Front
bounding_box_mesh.addVertex(lbb.x, rtf.y,
lbb.z) # Left - Top - Back
bounding_box_mesh.addVertex(lbb.x, lbb.y,
rtf.z) # Left - Bottom - Front
bounding_box_mesh.addVertex(lbb.x, lbb.y,
lbb.z) # Left - Bottom - Back
bounding_box_mesh.addVertex(rtf.x, lbb.y,
rtf.z) # Right - Bottom - Front
bounding_box_mesh.addVertex(rtf.x, lbb.y,
lbb.z) # Right - Bottom - Back
self._bounding_box_mesh = bounding_box_mesh.build()
def collidesWithBbox(self, check_bbox: AxisAlignedBox) -> bool:
"""Return if the provided bbox collides with the bbox of this SceneNode"""
bbox = self.getBoundingBox()
if bbox is not None:
if check_bbox.intersectsBox(
bbox
) != AxisAlignedBox.IntersectionResult.FullIntersection:
return True
return False
def _onParentChanged(self, node: Optional["SceneNode"]) -> None:
"""Handler for the ParentChanged signal
:param node: Node from which this event was triggered.
"""
for child in self.getChildren():
child.parentChanged.emit(self)
decoratorsChanged = Signal()
"""Signal for when a :type{SceneNodeDecorator} is added / removed."""
def addDecorator(self, decorator: SceneNodeDecorator) -> None:
"""Add a SceneNodeDecorator to this SceneNode.
:param decorator: The decorator to add.
"""
if type(decorator) in [type(dec) for dec in self._decorators]:
Logger.log(
"w",
"Unable to add the same decorator type (%s) to a SceneNode twice.",
type(decorator))
return
try:
decorator.setNode(self)
except AttributeError:
Logger.logException("e", "Unable to add decorator.")
return
self._decorators.append(decorator)
self.decoratorsChanged.emit(self)
def getDecorators(self) -> List[SceneNodeDecorator]:
"""Get all SceneNodeDecorators that decorate this SceneNode.
:return: list of all SceneNodeDecorators.
"""
return self._decorators
def getDecorator(self, dec_type: type) -> Optional[SceneNodeDecorator]:
"""Get SceneNodeDecorators by type.
:param dec_type: type of decorator to return.
"""
for decorator in self._decorators:
if type(decorator) == dec_type:
return decorator
return None
def removeDecorators(self):
"""Remove all decorators"""
for decorator in self._decorators:
decorator.clear()
self._decorators = []
self.decoratorsChanged.emit(self)
def removeDecorator(self, dec_type: type) -> None:
"""Remove decorator by type.
:param dec_type: type of the decorator to remove.
"""
for decorator in self._decorators:
if type(decorator) == dec_type:
decorator.clear()
self._decorators.remove(decorator)
self.decoratorsChanged.emit(self)
break
def callDecoration(self, function: str, *args, **kwargs) -> Any:
"""Call a decoration of this SceneNode.
SceneNodeDecorators add Decorations, which are callable functions.
:param function: The function to be called.
:param *args
:param **kwargs
"""
for decorator in self._decorators:
if hasattr(decorator, function):
try:
return getattr(decorator, function)(*args, **kwargs)
except Exception as e:
Logger.logException("e",
"Exception calling decoration %s: %s",
str(function), str(e))
return None
def hasDecoration(self, function: str) -> bool:
"""Does this SceneNode have a certain Decoration (as defined by a Decorator)
:param :type{string} function the function to check for.
"""
for decorator in self._decorators:
if hasattr(decorator, function):
return True
return False
def getName(self) -> str:
return self._name
def setName(self, name: str) -> None:
self._name = name
def getId(self) -> str:
return self._id
def setId(self, node_id: str) -> None:
self._id = node_id
def getDepth(self) -> int:
"""How many nodes is this node removed from the root?
:return: Steps from root (0 means it -is- the root).
"""
if self._parent is None:
return 0
return self._parent.getDepth() + 1
def setParent(self, scene_node: Optional["SceneNode"]) -> None:
""":brief Set the parent of this object
:param scene_node: SceneNode that is the parent of this object.
"""
if self._parent:
self._parent.removeChild(self)
if scene_node:
scene_node.addChild(self)
parentChanged = Signal()
"""Emitted whenever the parent changes."""
def isVisible(self) -> bool:
"""Get the visibility of this node.
The parents visibility overrides the visibility.
TODO: Let renderer actually use the visibility to decide whether to render or not.
"""
if self._parent is not None and self._visible:
return self._parent.isVisible()
else:
return self._visible
def setVisible(self, visible: bool) -> None:
"""Set the visibility of this SceneNode."""
self._visible = visible
def getMeshData(self) -> Optional[MeshData]:
"""Get the (original) mesh data from the scene node/object.
:returns: MeshData
"""
return self._mesh_data
def getMeshDataTransformed(self) -> Optional[MeshData]:
"""Get the transformed mesh data from the scene node/object, based on the transformation of scene nodes wrt root.
If this node is a group, it will recursively concatenate all child nodes/objects.
:returns: MeshData
"""
return MeshData(vertices=self.getMeshDataTransformedVertices(),
normals=self.getMeshDataTransformedNormals())
def getMeshDataTransformedVertices(self) -> Optional[numpy.ndarray]:
"""Get the transformed vertices from this scene node/object, based on the transformation of scene nodes wrt root.
If this node is a group, it will recursively concatenate all child nodes/objects.
:return: numpy.ndarray
"""
transformed_vertices = None
if self.callDecoration("isGroup"):
for child in self._children:
tv = child.getMeshDataTransformedVertices()
if transformed_vertices is None:
transformed_vertices = tv
else:
transformed_vertices = numpy.concatenate(
(transformed_vertices, tv), axis=0)
else:
if self._mesh_data:
transformed_vertices = self._mesh_data.getTransformed(
self.getWorldTransformation(copy=False)).getVertices()
return transformed_vertices
def getMeshDataTransformedNormals(self) -> Optional[numpy.ndarray]:
"""Get the transformed normals from this scene node/object, based on the transformation of scene nodes wrt root.
If this node is a group, it will recursively concatenate all child nodes/objects.
:return: numpy.ndarray
"""
transformed_normals = None
if self.callDecoration("isGroup"):
for child in self._children:
tv = child.getMeshDataTransformedNormals()
if transformed_normals is None:
transformed_normals = tv
else:
transformed_normals = numpy.concatenate(
(transformed_normals, tv), axis=0)
else:
if self._mesh_data:
transformed_normals = self._mesh_data.getTransformed(
self.getWorldTransformation(copy=False)).getNormals()
return transformed_normals
def setMeshData(self, mesh_data: Optional[MeshData]) -> None:
"""Set the mesh of this node/object
:param mesh_data: MeshData object
"""
self._mesh_data = mesh_data
self._resetAABB()
self.meshDataChanged.emit(self)
meshDataChanged = Signal()
"""Emitted whenever the attached mesh data object changes."""
def _onMeshDataChanged(self) -> None:
self.meshDataChanged.emit(self)
def addChild(self, scene_node: "SceneNode") -> None:
"""Add a child to this node and set it's parent as this node.
:params scene_node SceneNode to add.
"""
if scene_node in self._children:
return
scene_node.transformationChanged.connect(self.transformationChanged)
scene_node.childrenChanged.connect(self.childrenChanged)
scene_node.meshDataChanged.connect(self.meshDataChanged)
self._children.append(scene_node)
self._resetAABB()
self.childrenChanged.emit(self)
if not scene_node._parent is self:
scene_node._parent = self
scene_node._transformChanged()
scene_node.parentChanged.emit(self)
def removeChild(self, child: "SceneNode") -> None:
"""remove a single child
:param child: Scene node that needs to be removed.
"""
if child not in self._children:
return
child.transformationChanged.disconnect(self.transformationChanged)
child.childrenChanged.disconnect(self.childrenChanged)
child.meshDataChanged.disconnect(self.meshDataChanged)
try:
self._children.remove(child)
except ValueError: # Could happen that the child was removed asynchronously by a different thread. Don't crash by removing it twice.
pass
# But still update the AABB and such.
child._parent = None
child._transformChanged()
child.parentChanged.emit(self)
self._resetAABB()
self.childrenChanged.emit(self)
def removeAllChildren(self) -> None:
"""Removes all children and its children's children."""
for child in self._children:
child.removeAllChildren()
self.removeChild(child)
self.childrenChanged.emit(self)
def getChildren(self) -> List["SceneNode"]:
"""Get the list of direct children
:returns: List of children
"""
return self._children
def hasChildren(self) -> bool:
return True if self._children else False
def getAllChildren(self) -> List["SceneNode"]:
"""Get list of all children (including it's children children children etc.)
:returns: list ALl children in this 'tree'
"""
children = []
children.extend(self._children)
for child in self._children:
children.extend(child.getAllChildren())
return children
childrenChanged = Signal()
"""Emitted whenever the list of children of this object or any child object changes.
:param object: The object that triggered the change.
"""
def _updateCachedNormalMatrix(self) -> None:
self._cached_normal_matrix = Matrix(
self.getWorldTransformation(copy=False).getData())
self._cached_normal_matrix.setRow(3, [0, 0, 0, 1])
self._cached_normal_matrix.setColumn(3, [0, 0, 0, 1])
try:
self._cached_normal_matrix.pseudoinvert()
except numpy.linalg.LinAlgError: # Inversion can fail if the transformation is singular. In that case, the normal vectors would become degenerate anyway.
pass
self._cached_normal_matrix.transpose()
def getCachedNormalMatrix(self) -> Matrix:
if self._cached_normal_matrix is None:
self._updateCachedNormalMatrix()
return self._cached_normal_matrix
def getWorldTransformation(self, copy=True) -> Matrix:
"""Computes and returns the transformation from world to local space.
:returns: 4x4 transformation matrix
"""
if self._world_transformation is None:
self._updateWorldTransformation()
if copy:
return self._world_transformation.copy()
return self._world_transformation
def getLocalTransformation(self, copy=True) -> Matrix:
"""Returns the local transformation with respect to its parent. (from parent to local)
:returns transformation 4x4 (homogeneous) matrix
"""
if self._transformation is None:
self._updateLocalTransformation()
if copy:
return self._transformation.copy()
return self._transformation
def setTransformation(self, transformation: Matrix):
self._transformation = transformation.copy(
) # Make a copy to ensure we never change the given transformation
self._transformChanged()
def getOrientation(self) -> Quaternion:
"""Get the local orientation value."""
return deepcopy(self._orientation)
def getWorldOrientation(self) -> Quaternion:
return deepcopy(self._derived_orientation)
def rotate(self,
rotation: Quaternion,
transform_space: int = TransformSpace.Local) -> None:
"""Rotate the scene object (and thus its children) by given amount
:param rotation: :type{Quaternion} A quaternion indicating the amount of rotation.
:param transform_space: The space relative to which to rotate. Can be any one of the constants in SceneNode::TransformSpace.
"""
if not self._enabled:
return
orientation_matrix = rotation.toMatrix()
if transform_space == SceneNode.TransformSpace.Local:
self._transformation.multiply(orientation_matrix)
elif transform_space == SceneNode.TransformSpace.Parent:
self._transformation.preMultiply(orientation_matrix)
elif transform_space == SceneNode.TransformSpace.World:
self._transformation.multiply(
self._world_transformation.getInverse())
self._transformation.multiply(orientation_matrix)
self._transformation.multiply(self._world_transformation)
self._transformChanged()
def setOrientation(self,
orientation: Quaternion,
transform_space: int = TransformSpace.Local) -> None:
"""Set the local orientation of this scene node.
:param orientation: :type{Quaternion} The new orientation of this scene node.
:param transform_space: The space relative to which to rotate. Can be Local or World from SceneNode::TransformSpace.
"""
if not self._enabled or orientation == self._orientation:
return
if transform_space == SceneNode.TransformSpace.World:
if self.getWorldOrientation() == orientation:
return
new_orientation = orientation * (
self.getWorldOrientation() *
self._orientation.getInverse()).invert()
orientation_matrix = new_orientation.toMatrix()
else: # Local
orientation_matrix = orientation.toMatrix()
euler_angles = orientation_matrix.getEuler()
new_transform_matrix = Matrix()
new_transform_matrix.compose(scale=self._scale,
angles=euler_angles,
translate=self._position,
shear=self._shear)
self._transformation = new_transform_matrix
self._transformChanged()
def getScale(self) -> Vector:
"""Get the local scaling value."""
return self._scale
def getWorldScale(self) -> Vector:
return self._derived_scale
def scale(self,
scale: Vector,
transform_space: int = TransformSpace.Local) -> None:
"""Scale the scene object (and thus its children) by given amount
:param scale: :type{Vector} A Vector with three scale values
:param transform_space: The space relative to which to scale. Can be any one of the constants in SceneNode::TransformSpace.
"""
if not self._enabled:
return
scale_matrix = Matrix()
scale_matrix.setByScaleVector(scale)
if transform_space == SceneNode.TransformSpace.Local:
self._transformation.multiply(scale_matrix)
elif transform_space == SceneNode.TransformSpace.Parent:
self._transformation.preMultiply(scale_matrix)
elif transform_space == SceneNode.TransformSpace.World:
self._transformation.multiply(
self._world_transformation.getInverse())
self._transformation.multiply(scale_matrix)
self._transformation.multiply(self._world_transformation)
self._transformChanged()
def setScale(self,
scale: Vector,
transform_space: int = TransformSpace.Local) -> None:
"""Set the local scale value.
:param scale: :type{Vector} The new scale value of the scene node.
:param transform_space: The space relative to which to rotate. Can be Local or World from SceneNode::TransformSpace.
"""
if not self._enabled or scale == self._scale:
return
if transform_space == SceneNode.TransformSpace.Local:
self.scale(scale / self._scale, SceneNode.TransformSpace.Local)
return
if transform_space == SceneNode.TransformSpace.World:
if self.getWorldScale() == scale:
return
self.scale(scale / self._scale, SceneNode.TransformSpace.World)
def getPosition(self) -> Vector:
"""Get the local position."""
return self._position
def getWorldPosition(self) -> Vector:
"""Get the position of this scene node relative to the world."""
return self._derived_position
def translate(self,
translation: Vector,
transform_space: int = TransformSpace.Local) -> None:
"""Translate the scene object (and thus its children) by given amount.
:param translation: :type{Vector} The amount to translate by.
:param transform_space: The space relative to which to translate. Can be any one of the constants in SceneNode::TransformSpace.
"""
if not self._enabled:
return
translation_matrix = Matrix()
translation_matrix.setByTranslation(translation)
if transform_space == SceneNode.TransformSpace.Local:
self._transformation.multiply(translation_matrix)
elif transform_space == SceneNode.TransformSpace.Parent:
self._transformation.preMultiply(translation_matrix)
elif transform_space == SceneNode.TransformSpace.World:
world_transformation = self._world_transformation.copy()
self._transformation.multiply(
self._world_transformation.getInverse())
self._transformation.multiply(translation_matrix)
self._transformation.multiply(world_transformation)
self._transformChanged()
def setPosition(self,
position: Vector,
transform_space: int = TransformSpace.Local) -> None:
"""Set the local position value.
:param position: The new position value of the SceneNode.
:param transform_space: The space relative to which to rotate. Can be Local or World from SceneNode::TransformSpace.
"""
if not self._enabled or position == self._position:
return
if transform_space == SceneNode.TransformSpace.Local:
self.translate(position - self._position,
SceneNode.TransformSpace.Parent)
if transform_space == SceneNode.TransformSpace.World:
if self.getWorldPosition() == position:
return
self.translate(position - self._derived_position,
SceneNode.TransformSpace.World)
transformationChanged = Signal()
"""Signal. Emitted whenever the transformation of this object or any child object changes.
:param object: The object that caused the change.
"""
def lookAt(self, target: Vector, up: Vector = Vector.Unit_Y) -> None:
"""Rotate this scene node in such a way that it is looking at target.
:param target: :type{Vector} The target to look at.
:param up: :type{Vector} The vector to consider up. Defaults to Vector.Unit_Y, i.e. (0, 1, 0).
"""
if not self._enabled:
return
eye = self.getWorldPosition()
f = (target - eye).normalized()
up = up.normalized()
s = f.cross(up).normalized()
u = s.cross(f).normalized()
m = Matrix([[s.x, u.x, -f.x, 0.0], [s.y, u.y, -f.y, 0.0],
[s.z, u.z, -f.z, 0.0], [0.0, 0.0, 0.0, 1.0]])
self.setOrientation(Quaternion.fromMatrix(m))
def render(self, renderer) -> bool:
"""Can be overridden by child nodes if they need to perform special rendering.
If you need to handle rendering in a special way, for example for tool handles,
you can override this method and render the node. Return True to prevent the
view from rendering any attached mesh data.
:param renderer: The renderer object to use for rendering.
:return: False if the view should render this node, True if we handle our own rendering.
"""
return False
def isEnabled(self) -> bool:
"""Get whether this SceneNode is enabled, that is, it can be modified in any way."""
if self._parent is not None and self._enabled:
return self._parent.isEnabled()
else:
return self._enabled
def setEnabled(self, enable: bool) -> None:
"""Set whether this SceneNode is enabled.
:param enable: True if this object should be enabled, False if not.
:sa isEnabled
"""
self._enabled = enable
def isSelectable(self) -> bool:
"""Get whether this SceneNode can be selected.
:note This will return false if isEnabled() returns false.
"""
return self._enabled and self._selectable
def setSelectable(self, select: bool) -> None:
"""Set whether this SceneNode can be selected.
:param select: True if this SceneNode should be selectable, False if not.
"""
self._selectable = select
def getBoundingBox(self) -> Optional[AxisAlignedBox]:
"""Get the bounding box of this node and its children."""
if not self._calculate_aabb:
return None
if self._aabb is None:
self._calculateAABB()
return self._aabb
def setCalculateBoundingBox(self, calculate: bool) -> None:
"""Set whether or not to calculate the bounding box for this node.
:param calculate: True if the bounding box should be calculated, False if not.
"""
self._calculate_aabb = calculate
boundingBoxChanged = Signal()
def getShear(self) -> Vector:
return self._shear
def getSetting(self, key: str, default_value: str = "") -> str:
return self._settings.get(key, default_value)
def setSetting(self, key: str, value: str) -> None:
self._settings[key] = value
def invertNormals(self) -> None:
for child in self._children:
child.invertNormals()
if self._mesh_data:
self._mesh_data.invertNormals()
def _transformChanged(self) -> None:
self._updateTransformation()
self._resetAABB()
self.transformationChanged.emit(self)
for child in self._children:
child._transformChanged()
def _updateLocalTransformation(self) -> None:
self._position, euler_angle_matrix, self._scale, self._shear = self._transformation.decompose(
)
self._orientation.setByMatrix(euler_angle_matrix)
def _updateWorldTransformation(self) -> None:
if self._parent:
self._world_transformation = self._parent.getWorldTransformation(
).multiply(self._transformation)
else:
self._world_transformation = self._transformation
self._derived_position, world_euler_angle_matrix, self._derived_scale, world_shear = self._world_transformation.decompose(
)
self._derived_orientation.setByMatrix(world_euler_angle_matrix)
def _updateTransformation(self) -> None:
self._updateLocalTransformation()
self._updateWorldTransformation()
self._updateCachedNormalMatrix()
def _resetAABB(self) -> None:
if not self._calculate_aabb:
return
self._aabb = None
self._bounding_box_mesh = None
if self._parent:
self._parent._resetAABB()
self.boundingBoxChanged.emit()
def _calculateAABB(self) -> None:
aabb = None
if self._mesh_data:
aabb = self._mesh_data.getExtents(
self.getWorldTransformation(copy=False))
for child in self._children:
child_bb = child.getBoundingBox()
if child_bb is None or child_bb.minimum == child_bb.maximum:
# Child had a degenerate bounding box, such as an empty group. Don't count it along.
continue
if aabb is None:
aabb = child_bb
else:
aabb = aabb + child_bb
if aabb is None: # There is no mesh data and no children with bounding box. Use the current position then, but it's a degenerate AABB.
position = self.getWorldPosition()
aabb = AxisAlignedBox(minimum=position, maximum=position)
self._aabb = aabb
def __str__(self) -> str:
"""String output for debugging."""
name = self._name if self._name != "" else hex(id(self))
return "<" + self.__class__.__qualname__ + " object: '" + name + "'>"