140 lines
4.9 KiB
Python
140 lines
4.9 KiB
Python
from uuid import UUID
|
|
from state.base import State
|
|
from services.bottom.V0 import Bottom
|
|
from services.primitives.float_type import Float
|
|
|
|
import math
|
|
|
|
|
|
class PointPolar:
|
|
"""
|
|
Implements services for the point polar LTM.
|
|
Implementation is done in terms of Python data structures
|
|
"""
|
|
def __init__(self, model: UUID, state: State):
|
|
type_model_id = state.read_dict(state.read_root(), "PointPolar")
|
|
self.type_model = UUID(state.read_value(type_model_id))
|
|
self.model = model
|
|
self.state = state
|
|
|
|
self.point = None
|
|
|
|
def create_point(self, r: float, theta: float):
|
|
"""
|
|
Creates a point.
|
|
|
|
Args:
|
|
r: distance from pole
|
|
theta: angle from polar axis
|
|
|
|
Returns:
|
|
Nothing.
|
|
"""
|
|
if self.point == None:
|
|
self.point = (r, theta)
|
|
else:
|
|
raise RuntimeError("A PointPolar model can contain at most 1 point.")
|
|
|
|
def read_point(self):
|
|
"""
|
|
Reads point.
|
|
|
|
Returns:
|
|
Textual representation of the point data.
|
|
"""
|
|
if self.point == None:
|
|
raise RuntimeError("No point found in model.")
|
|
else:
|
|
return f"(r = {self.point[0]}, \u03B8 = {self.point[1]})"
|
|
|
|
def delete_point(self):
|
|
"""
|
|
Deletes point.
|
|
|
|
Returns:
|
|
Nothing.
|
|
"""
|
|
self.point = None
|
|
|
|
def apply_movement(self, delta_r: float, delta_theta: float):
|
|
"""
|
|
Moves point.
|
|
|
|
Args:
|
|
delta_r: change in distance from pole
|
|
delta_theta: change in angle from polar axis
|
|
|
|
Returns:
|
|
Nothing.
|
|
"""
|
|
if self.point != None:
|
|
self.point = (self.point[0] + delta_r, self.point[1] + delta_theta)
|
|
else:
|
|
raise RuntimeError("No point found in model.")
|
|
|
|
def to_bottom(self):
|
|
"""
|
|
Converts implementation specific model representation to
|
|
canonical representation.
|
|
|
|
Returns:
|
|
Nothing.
|
|
"""
|
|
x = self.point[0]*math.cos(self.point[1]) # x = r * cos(theta)
|
|
y = self.point[0]*math.sin(self.point[1]) # y = r * sin(theta)
|
|
bottom = Bottom(self.state)
|
|
# clear residual model
|
|
for element in bottom.read_outgoing_elements(self.model):
|
|
bottom.delete_element(element)
|
|
# create primitive models
|
|
c1_model = bottom.create_node()
|
|
c2_model = bottom.create_node()
|
|
Float(c1_model, self.state).create(x)
|
|
Float(c2_model, self.state).create(y)
|
|
# instantiate Point class
|
|
point_node = bottom.create_node() # create point node
|
|
bottom.create_edge(self.model, point_node, "point") # attach to model
|
|
morph_node, = bottom.read_outgoing_elements(self.type_model, "PointPolar") # retrieve type
|
|
bottom.create_edge(point_node, morph_node, "Morphism") # create morphism link
|
|
# instantiate c1 attribute
|
|
c1_node = bottom.create_node(str(c1_model))
|
|
bottom.create_edge(self.model, c1_node, "point.c1")
|
|
c1_link = bottom.create_edge(point_node, c1_node)
|
|
bottom.create_edge(self.model, c1_link, "point.c1_link")
|
|
ltm_point_node, = bottom.read_outgoing_elements(self.type_model, "Float")
|
|
ltm_point_link, = bottom.read_outgoing_elements(self.type_model, "PointPolar_c1")
|
|
bottom.create_edge(c1_node, ltm_point_node, "Morphism")
|
|
bottom.create_edge(c1_link, ltm_point_link, "Morphism")
|
|
# instantiate c2 attribute
|
|
c2_node = bottom.create_node(str(c2_model))
|
|
bottom.create_edge(self.model, c2_node, "point.c2")
|
|
c2_link = bottom.create_edge(point_node, c2_node)
|
|
bottom.create_edge(self.model, c2_link, "point.c2_link")
|
|
ltm_point_node, = bottom.read_outgoing_elements(self.type_model, "Float")
|
|
ltm_point_link, = bottom.read_outgoing_elements(self.type_model, "PointPolar_c2")
|
|
bottom.create_edge(c2_node, ltm_point_node, "Morphism")
|
|
bottom.create_edge(c2_link, ltm_point_link, "Morphism")
|
|
|
|
def from_bottom(self):
|
|
"""
|
|
Converts canonical representation to
|
|
implementation specific model representation.
|
|
|
|
Returns:
|
|
Nothing.
|
|
"""
|
|
bottom = Bottom(self.state)
|
|
keys = bottom.read_keys(self.model)
|
|
x_key, = filter(lambda k: k.endswith(".c1"), keys)
|
|
y_key, = filter(lambda k: k.endswith(".c2"), keys)
|
|
x_ref_node, = bottom.read_outgoing_elements(self.model, x_key)
|
|
y_ref_node, = bottom.read_outgoing_elements(self.model, y_key)
|
|
x_model = UUID(bottom.read_value(x_ref_node))
|
|
y_model = UUID(bottom.read_value(y_ref_node))
|
|
x_val_node, = bottom.read_outgoing_elements(x_model)
|
|
y_val_node, = bottom.read_outgoing_elements(y_model)
|
|
x = bottom.read_value(x_val_node)
|
|
y = bottom.read_value(y_val_node)
|
|
r = math.sqrt(math.pow(x, 2) + math.pow(y, 2))
|
|
theta = math.atan2(y, x)
|
|
self.point = (r, theta)
|