Parabola¶

Declaration¶

class declaracad.occ.draw.Parabola(parent=None, **kwargs)[source]¶

Bases: Edge

Creates a Parabola with its local coordinate system given by the position and direction and it’s focal length focal_length.

Attributes:

focal_length: Float: The focal length of the parabola.

Methods

`activate_bottom_up`()	Initialize the proxy on the bottom-up activation pass.
`activate_proxy`()	Activate the proxy object tree.
`activate_top_down`()	Initialize the proxy on the top-down activation pass.
`child_added`(child)	A reimplemented child added event handler.
`child_moved`(child)	A method invoked when a child is moved in the object.
`child_removed`(child)	A reimplemented child removed event handler.
`destroy`()	A reimplemented destructor.
`find`(name[, regex])	Find the first object in the subtree with the given name.
`find_all`(name[, regex])	Find all objects in the subtree with the given name.
`freeze`	Freeze the atom to prevent further modifications to its attributes.
`get_member`	Get the named member for the atom.
`get_value_at`(t[, derivative])	Get the value of the curve derivative at t.
`has_observer`	Get whether the atom has the given observer for a given topic.
`has_observers`	Get whether the atom has observers for a given topic.
`initialize`()	A reimplemented initializer.
`insert_children`(before, insert)	Insert children into this object at the given location.
`members`()	Get the members dictionary for the type.
`notifications_enabled`	Get whether notification is enabled for the atom.
`notify`	Call the registered observers for a given topic with positional and keyword arguments.
`observe`	Register an observer callback to observe changes on the given topic(s).
`parent_changed`(old, new)	A method invoked when the parent of the object changes.
`render`()	Generates and returns the actual shape from the declaration.
`root_object`()	Get the root object for this hierarchy.
`set_notifications_enabled`	Enable or disable notifications for the atom.
`set_parent`(parent)	Set the parent for this object.
`suppress_notifications`()	Disable member notifications within in a context.
`traverse`([depth_first])	Yield all of the objects in the tree, from this object down.
`traverse_ancestors`([root])	Yield all of the objects in the tree, from this object up.
`unobserve`	Unregister an observer callback for the given topic(s).

line_style

Notes

The XDirection of A2 defines the axis of symmetry of the parabola. The YDirection of A2 is parallel to the directrix of the parabola. The Location point of A2 is the vertex of the parabola Raises ConstructionError if Focal < 0.0 Raised if Focal < 0.0.

Examples

Wire:

Parabola:: focal_length = 10

focal_length¶: Focal length of the parabola

proxy¶: Reference to the implementation control

Implementation¶

class declaracad.occ.impl.occ_parabola.OccParabola[source]¶

Bases: OccEdge, ProxyParabola

Attributes:

ais_shape
curve
declaration
displayed
is_active: Test whether or not the proxy is fully activated.
location
reference
shape
tdf_label
topology
viewer

Methods

`activate_bottom_up`()	Activate the proxy tree for the bottom-up pass.
`activate_top_down`()	Activate the proxy for the top-down pass.
`child_added`(child)	Handle a child being added to the object.
`child_removed`(child)	Handle a child being removed from the object.
`child_shapes`()	Iterator of all child shapes
`children`()	Get the child objects for this object.
`create_shape`()	Create the toolkit shape for the proxy object.
`destroy`()	Destroy the proxy and any of its resources.
`freeze`	Freeze the atom to prevent further modifications to its attributes.
`get_first_child`()	Return shape to apply the operation to.
`get_member`	Get the named member for the atom.
`get_transform`()	Create a transform which rotates the default axis to align with the normal given by the position
`has_observer`	Get whether the atom has the given observer for a given topic.
`has_observers`	Get whether the atom has observers for a given topic.
`init_layout`()	Initialize the layout of the toolkit shape.
`init_shape`()	Initialize the state of the toolkit widget.
`members`()	Get the members dictionary for the type.
`notifications_enabled`	Get whether notification is enabled for the atom.
`notify`	Call the registered observers for a given topic with positional and keyword arguments.
`observe`	Register an observer callback to observe changes on the given topic(s).
`parent`()	Get the parent proxy object for this object.
`set_notifications_enabled`	Enable or disable notifications for the atom.
`suppress_notifications`()	Disable member notifications within in a context.
`unobserve`	Unregister an observer callback for the given topic(s).
`walk_shapes`([ignore_display])	Iterator of all child shapes

clear_focus
ensure_hidden
ensure_visible
focus_next_child
focus_previous_child
get_bounding_box
get_value_at
has_focus
make_edge
on_shape_changed
parent_shape
request_relayout
restyle
set_as_wire
set_axis
set_background
set_color
set_direction
set_display
set_enabled
set_focal_length
set_focus
set_font
set_foreground
set_line_style
set_line_width
set_maximum_size
set_minimum_size
set_position
set_reverse
set_solve
set_status_tip
set_surface
set_texture
set_tool_tip
set_transparency
set_visible

create_shape()[source]¶

Create the toolkit shape for the proxy object.

This method is called during the top-down pass, just before the ‘init_shape()’ method is called. This method should create the toolkit widget and assign it to the ‘widget’ attribute.

reference¶: Update the class reference