Arc¶

Declaration¶

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

Bases: Line

Creates an Arc that can be used to build a Wire.

Attributes:

radius: Float, optional: The radius of the arc.
alpha1: Float, optional: The starting angle of the arc.
alpha2: Float, optional: The ending angle of the arc.
clockwise: Bool: If using two points this gives the interpolation direction

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

An arc can be constructed using:

three child Points
axis, radius, alpha 1, alpha 2
axis, radius, and two child Points
axis, radius, one child Point and alpha 1

Examples

import math Wire:

Arc:
attr deg = 5 radius = 1 alpha1 = math.radians(deg) alpha2 = math.radians(deg+2)

Wire:

Arc:

points = (: (1, 0, 0), (2, 5, 0), (3, 0, 0)

)

Wire:

Arc:

solve = (: curve.topology.start_tangent, end_point,

)

alpha1¶: Angle circle (optional)

alpha2¶: 2nd Angle circle (optional)

clockwise¶: Clockwise (sweep direction, when using two points)

proxy¶: Reference to the implementation control

radius¶: Radius of the circle (optional)

Implementation¶

class declaracad.occ.impl.occ_arc.OccArc[source]¶

Bases: OccLine, ProxyArc

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_arc_from_solver`(**params)	Create an arc by solving the given parameters.
`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_transformed_points
get_value_at
has_focus
make_edge
on_shape_changed
parent_shape
request_relayout
restyle
set_alpha1
set_alpha2
set_as_wire
set_axis
set_background
set_clockwise
set_color
set_direction
set_display
set_enabled
set_focus
set_font
set_foreground
set_line_style
set_line_width
set_maximum_size
set_minimum_size
set_points
set_position
set_radius
set_radius2
set_reverse
set_solve
set_status_tip
set_surface
set_texture
set_tool_tip
set_transparency
set_visible

create_arc_from_solver(**params)[source]¶: Create an arc by solving the given parameters.

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