diff --git a/examples/Simple_Realistic_Railway_Generator.py b/examples/Simple_Realistic_Railway_Generator.py
index 7f155cf2c72f14231993c644df29ae215bd29903..4ffe6016bd07de20568c8ace7cd568e97364b79f 100644
--- a/examples/Simple_Realistic_Railway_Generator.py
+++ b/examples/Simple_Realistic_Railway_Generator.py
@@ -74,12 +74,12 @@ def realistic_rail_generator(num_cities=5,
for i in range(len(generate_city_locations)):
# station main orientation (horizontal or vertical
rot_angle = np.random.choice(rotation_angles_set)
- add_pos_val = Vec2d.scale_pos(Vec2d.rotate_pos((1, 0), rot_angle),
+ add_pos_val = Vec2d.scale(Vec2d.rotate((1, 0), rot_angle),
int(max(1.0, (intern_city_size - 3) / 2)))
- generate_city_locations[i][0] = Vec2d.add_pos(generate_city_locations[i][1], add_pos_val)
- add_pos_val = Vec2d.scale_pos(Vec2d.rotate_pos((1, 0), 180 + rot_angle),
+ generate_city_locations[i][0] = Vec2d.add(generate_city_locations[i][1], add_pos_val)
+ add_pos_val = Vec2d.scale(Vec2d.rotate((1, 0), 180 + rot_angle),
int(max(1.0, (intern_city_size - 3) / 2)))
- generate_city_locations[i][1] = Vec2d.add_pos(generate_city_locations[i][1], add_pos_val)
+ generate_city_locations[i][1] = Vec2d.add(generate_city_locations[i][1], add_pos_val)
return generate_city_locations
def create_stations_from_city_locations(rail_trans: RailEnvTransitions,
@@ -107,13 +107,13 @@ def realistic_rail_generator(num_cities=5,
org_start_node = generate_city_locations[city_loop][0]
org_end_node = generate_city_locations[city_loop][1]
- ortho_trans = Vec2d.make_orthogonal_pos(
- Vec2d.normalize_pos(Vec2d.subtract_pos(org_start_node, org_end_node)))
+ ortho_trans = Vec2d.make_orthogonal(
+ Vec2d.normalize(Vec2d.subtract(org_start_node, org_end_node)))
s = (ct - number_of_connecting_tracks / 2.0)
- start_node = Vec2d.ceil_pos(
- Vec2d.add_pos(org_start_node, Vec2d.scale_pos(ortho_trans, s)))
- end_node = Vec2d.ceil_pos(
- Vec2d.add_pos(org_end_node, Vec2d.scale_pos(ortho_trans, s)))
+ start_node = Vec2d.ceil(
+ Vec2d.add(org_start_node, Vec2d.scale(ortho_trans, s)))
+ end_node = Vec2d.ceil(
+ Vec2d.add(org_end_node, Vec2d.scale(ortho_trans, s)))
connection = connect_from_nodes(rail_trans, grid_map, start_node, end_node)
if len(connection) > 0:
@@ -248,7 +248,7 @@ def realistic_rail_generator(num_cities=5,
continue
ens = e_nodes[city_loop_find_shortest]
for en in ens:
- d = Vec2d.get_norm_pos(Vec2d.subtract_pos(en, start_node))
+ d = Vec2d.get_euclidean_distance(start_node,en)
if d < min_distance:
min_distance = d
end_node = en
diff --git a/flatland/core/grid/grid4_astar.py b/flatland/core/grid/grid4_astar.py
index 3b4e69380a0cb3f3e69d2b6a08ab145f7a20ce04..5bec1ce454df9e6c41ad8c48fae243116f4ff222 100644
--- a/flatland/core/grid/grid4_astar.py
+++ b/flatland/core/grid/grid4_astar.py
@@ -1,6 +1,7 @@
from flatland.core.grid.grid4_utils import validate_new_transition
from flatland.core.grid.grid_utils import IntVector2D
from flatland.core.grid.grid_utils import IntVector2DArrayType
+from flatland.core.grid.grid_utils import Vec2dOperations as Vec2d
from flatland.core.grid.rail_env_grid import RailEnvTransitions
from flatland.core.transition_map import GridTransitionMap
@@ -29,8 +30,9 @@ class AStarNode:
self.f = other.f
-def a_star(rail_trans: RailEnvTransitions, grid_map: GridTransitionMap, start: IntVector2D, end: IntVector2D) -> \
- (IntVector2DArrayType):
+def a_star(rail_trans: RailEnvTransitions,
+ grid_map: GridTransitionMap,
+ start: IntVector2D, end: IntVector2D) -> IntVector2DArrayType:
"""
Returns a list of tuples as a path from the given start to end.
If no path is found, returns path to closest point to end.
@@ -94,10 +96,8 @@ def a_star(rail_trans: RailEnvTransitions, grid_map: GridTransitionMap, start: I
# create the f, g, and h values
child.g = current_node.g + 1
- # this heuristic favors diagonal paths:
- # child.h = ((child.pos[0] - end_node.pos[0]) ** 2) + ((child.pos[1] - end_node.pos[1]) ** 2) \# noqa: E800
# this heuristic avoids diagonal paths
- child.h = abs(child.pos[0] - end_node.pos[0]) + abs(child.pos[1] - end_node.pos[1])
+ child.h = Vec2d.get_manhattan_distance(child.pos, end_node.pos)
child.f = child.g + child.h
# already in the open list?
diff --git a/flatland/core/grid/grid_utils.py b/flatland/core/grid/grid_utils.py
index ffbf79a7b99e1628d52814638c753811ad9f7282..a9d6ffaa19cc12e17e84702827d5f47df8c07ac6 100644
--- a/flatland/core/grid/grid_utils.py
+++ b/flatland/core/grid/grid_utils.py
@@ -11,7 +11,7 @@ IntVector2DArrayType = []
class Vec2dOperations:
@staticmethod
- def subtract_pos(node_a: Vector2D, node_b: Vector2D) -> Vector2D:
+ def subtract(node_a: Vector2D, node_b: Vector2D) -> Vector2D:
"""
vector operation : node_a - node_b
@@ -24,7 +24,7 @@ class Vec2dOperations:
return node_a[0] - node_b[0], node_a[1] - node_b[1]
@staticmethod
- def add_pos(node_a: Vector2D, node_b: Vector2D) -> Vector2D:
+ def add(node_a: Vector2D, node_b: Vector2D) -> Vector2D:
"""
vector operation : node_a + node_b
@@ -37,7 +37,7 @@ class Vec2dOperations:
return node_a[0] + node_b[0], node_a[1] + node_b[1]
@staticmethod
- def make_orthogonal_pos(node: Vector2D) -> Vector2D:
+ def make_orthogonal(node: Vector2D) -> Vector2D:
"""
vector operation : rotates the 2D vector +90°
@@ -49,7 +49,7 @@ class Vec2dOperations:
return node[1], -node[0]
@staticmethod
- def get_norm_pos(node: Vector2D) -> float:
+ def get_norm(node: Vector2D) -> float:
"""
calculates the euclidean norm of the 2d vector
@@ -60,8 +60,45 @@ class Vec2dOperations:
"""
return np.sqrt(node[0] * node[0] + node[1] * node[1])
+
+ @staticmethod
+ def get_manhattan_norm(node: Vector2D) -> float:
+ """
+ calculates the euclidean norm of the 2d vector
+
+ :param node: tuple with coordinate (x,y) or 2d vector
+ :return:
+ -------
+ returns the manhatten norm
+ """
+ return abs(node[0] * node[0]) + abs(node[1] * node[1])
+
+ @staticmethod
+ def get_euclidean_distance(node_a: Vector2D,node_b: Vector2D) -> float:
+ """
+ calculates the euclidean norm of the 2d vector
+
+ :param node: tuple with coordinate (x,y) or 2d vector
+ :return:
+ -------
+ returnss the manhatten distance
+ """
+ return Vec2dOperations.get_norm(Vec2dOperations.subtract(node_b,node_a))
+
+ @staticmethod
+ def get_manhattan_distance(node_a: Vector2D, node_b: Vector2D) -> float:
+ """
+ calculates the euclidean norm of the 2d vector
+
+ :param node: tuple with coordinate (x,y) or 2d vector
+ :return:
+ -------
+ returnss the manhatten distance
+ """
+ return Vec2dOperations.get_manhattan_norm(Vec2dOperations.subtract(node_b, node_a))
+
@staticmethod
- def normalize_pos(node: Vector2D) -> Tuple[float, float]:
+ def normalize(node: Vector2D) -> Tuple[float, float]:
"""
normalize the 2d vector = v/|v|
@@ -70,13 +107,13 @@ class Vec2dOperations:
-------
tuple with coordinate (x,y) or 2d vector
"""
- n = Vec2dOperations.get_norm_pos(node)
+ n = Vec2dOperations.get_norm(node)
if n > 0.0:
n = 1 / n
- return Vec2dOperations.scale_pos(node, n)
+ return Vec2dOperations.scale(node, n)
@staticmethod
- def scale_pos(node: Vector2D, scale: float) -> Vector2D:
+ def scale(node: Vector2D, scale: float) -> Vector2D:
"""
scales the 2d vector = node * scale
@@ -89,7 +126,7 @@ class Vec2dOperations:
return node[0] * scale, node[1] * scale
@staticmethod
- def round_pos(node: Vector2D) -> IntVector2D:
+ def round(node: Vector2D) -> IntVector2D:
"""
rounds the x and y coordinate and convert them to an integer values
@@ -101,7 +138,7 @@ class Vec2dOperations:
return int(np.round(node[0])), int(np.round(node[1]))
@staticmethod
- def ceil_pos(node: Vector2D) -> IntVector2D:
+ def ceil(node: Vector2D) -> IntVector2D:
"""
ceiling the x and y coordinate and convert them to an integer values
@@ -113,7 +150,7 @@ class Vec2dOperations:
return int(np.ceil(node[0])), int(np.ceil(node[1]))
@staticmethod
- def bound_pos(node: Vector2D, min_value: float, max_value: float) -> Vector2D:
+ def bound(node: Vector2D, min_value: float, max_value: float) -> Vector2D:
"""
force the values x and y to be between min_value and max_value
@@ -127,7 +164,7 @@ class Vec2dOperations:
return max(min_value, min(max_value, node[0])), max(min_value, min(max_value, node[1]))
@staticmethod
- def rotate_pos(node: Vector2D, rot_in_degree: float) -> Vector2D:
+ def rotate(node: Vector2D, rot_in_degree: float) -> Vector2D:
"""
rotate the 2d vector with given angle in degree