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378 lines
12 KiB
Python
378 lines
12 KiB
Python
"""
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WIP: road shape drawing.
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"""
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from dataclasses import dataclass
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from typing import List, Optional
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import numpy as np
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import svgwrite
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from roentgen.flinger import Flinger
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from roentgen.osm_reader import OSMNode
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from roentgen.vector import Line, compute_angle, norm, turn_by_angle
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__author__ = "Sergey Vartanov"
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__email__ = "me@enzet.ru"
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@dataclass
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class Lane:
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"""
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Road lane specification.
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"""
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width: Optional[float] = None # Width in meters
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is_forward: Optional[bool] = None # Whether lane is forward or backward
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min_speed: Optional[float] = None # Minimal speed on the lane
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# "none", "merge_to_left", "slight_left", "slight_right"
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turn: Optional[str] = None
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change: Optional[str] = None # "not_left", "not_right"
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destination: Optional[str] = None # Lane destination
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def set_forward(self, is_forward: bool) -> None:
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self.is_forward = is_forward
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def get_width(self, scale: float):
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"""Get lane width. We use standard 3.7 m lane."""
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if self.width is None:
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return 3.7 * scale
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return self.width * scale
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class RoadPart:
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"""
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Line part of the road.
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"""
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def __init__(
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self,
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point_1: np.array,
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point_2: np.array,
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lanes: List[Lane],
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scale: False,
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):
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"""
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:param point_1: start point of the road part
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:param point_2: end point of the road part
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:param lanes: lane specification
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"""
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self.point_1: np.array = point_1
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self.point_2: np.array = point_2
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self.lanes: List[Lane] = lanes
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if lanes:
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self.width = sum(map(lambda x: x.get_width(scale), lanes))
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else:
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self.width = 1
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self.left_offset: float = self.width / 2
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self.right_offset: float = self.width / 2
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self.turned: np.array = norm(
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turn_by_angle(self.point_2 - self.point_1, np.pi / 2)
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)
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self.right_vector: np.array = self.turned * self.right_offset
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self.left_vector: np.array = -self.turned * self.left_offset
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self.right_connection: np.array = None
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self.left_connection: np.array = None
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self.right_projection: np.array = None
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self.left_projection: np.array = None
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self.left_outer = None
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self.right_outer = None
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self.point_a = None
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@classmethod
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def from_nodes(
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cls, node_1: OSMNode, node_2: OSMNode, flinger: Flinger, road, scale
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) -> "RoadPart":
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"""
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Construct road part from OSM nodes.
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"""
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lanes = [Lane(road.width / road.lanes)] * road.lanes
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return cls(
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flinger.fling(node_1.coordinates),
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flinger.fling(node_2.coordinates),
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lanes,
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scale,
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)
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def update(self) -> None:
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"""
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Compute additional points.
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"""
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if self.left_connection is not None:
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self.right_projection = (
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self.left_connection + self.right_vector - self.left_vector
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)
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if self.right_connection is not None:
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self.left_projection = (
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self.right_connection - self.right_vector + self.left_vector
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)
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if (
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self.left_connection is not None
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and self.right_connection is not None
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):
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a = np.linalg.norm(self.right_connection - self.point_1)
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b = np.linalg.norm(self.right_projection - self.point_1)
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if a > b:
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self.right_outer = self.right_connection
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self.left_outer = self.left_projection
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else:
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self.right_outer = self.right_projection
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self.left_outer = self.left_connection
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self.point_middle = self.right_outer - self.right_vector
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max_: float = 100
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if np.linalg.norm(self.point_middle - self.point_1) > max_:
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self.point_a = self.point_1 + max_ * norm(
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self.point_middle - self.point_1
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)
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self.right_outer = self.point_a + self.right_vector
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self.left_outer = self.point_a + self.left_vector
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else:
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self.point_a = self.point_middle
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def get_angle(self) -> float:
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"""
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Get an angle between line and x axis.
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"""
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return compute_angle(self.point_2 - self.point_1)
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def draw_normal(self, drawing: svgwrite.Drawing):
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"""
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Draw some debug lines.
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"""
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line = drawing.path(
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("M", self.point_1, "L", self.point_2),
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fill="none",
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stroke="#8888FF",
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stroke_width=self.width,
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)
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drawing.add(line)
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def draw_debug(self, drawing: svgwrite.Drawing):
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"""
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Draw some debug lines.
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"""
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line = drawing.path(
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("M", self.point_1, "L", self.point_2),
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fill="none",
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stroke="#000000",
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)
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drawing.add(line)
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line = drawing.path(
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(
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"M", self.point_1 + self.right_vector,
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"L", self.point_2 + self.right_vector,
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),
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fill="none",
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stroke="#FF0000",
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stroke_width=0.5,
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) # fmt: skip
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drawing.add(line)
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line = drawing.path(
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(
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"M", self.point_1 + self.left_vector,
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"L", self.point_2 + self.left_vector,
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),
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fill="none",
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stroke="#0000FF",
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stroke_width=0.5,
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) # fmt: skip
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drawing.add(line)
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opacity: float = 0.4
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radius: float = 2
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if self.right_connection is not None:
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circle = drawing.circle(
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self.right_connection, 2.5, fill="#FF0000", opacity=opacity
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)
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drawing.add(circle)
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if self.left_connection is not None:
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circle = drawing.circle(
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self.left_connection, 2.5, fill="#0000FF", opacity=opacity
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)
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drawing.add(circle)
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if self.right_projection is not None:
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circle = drawing.circle(
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self.right_projection, 1.5, fill="#FF0000", opacity=opacity
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)
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drawing.add(circle)
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if self.left_projection is not None:
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circle = drawing.circle(
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self.left_projection, 1.5, fill="#0000FF", opacity=opacity
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)
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drawing.add(circle)
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if self.right_outer is not None:
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circle = drawing.circle(
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self.right_outer,
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3.5,
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stroke_width=0.5,
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fill="none",
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stroke="#FF0000",
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opacity=opacity,
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)
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drawing.add(circle)
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if self.left_outer is not None:
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circle = drawing.circle(
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self.left_outer,
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3.5,
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stroke_width=0.5,
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fill="none",
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stroke="#0000FF",
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opacity=opacity,
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)
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drawing.add(circle)
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if self.point_a is not None:
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circle = drawing.circle(self.point_a, radius, fill="#000000")
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drawing.add(circle)
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# self.draw_entrance(drawing, True)
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def draw(self, drawing: svgwrite.Drawing):
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"""
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Draw road part.
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"""
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if self.left_connection is not None:
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path_commands = [
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"M", self.point_2 + self.right_vector,
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"L", self.point_2 + self.left_vector,
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"L", self.left_connection,
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"L", self.right_connection,
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"Z",
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] # fmt: skip
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drawing.add(drawing.path(path_commands, fill="#CCCCCC"))
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def draw_entrance(self, drawing: svgwrite.Drawing, is_debug: bool = False):
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"""
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Draw intersection entrance part.
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"""
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if (
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self.left_connection is not None
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and self.right_connection is not None
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):
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path_commands = [
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"M", self.right_projection,
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"L", self.right_connection,
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"L", self.left_projection,
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"L", self.left_connection,
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"Z",
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] # fmt: skip
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if is_debug:
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path = drawing.path(
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path_commands,
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fill="none",
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stroke="#880088",
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stroke_width=0.5,
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)
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drawing.add(path)
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else:
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drawing.add(drawing.path(path_commands, fill="#88FF88"))
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def draw_lanes(self, drawing: svgwrite.Drawing, scale: float):
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"""
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Draw lane delimiters.
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"""
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for lane in self.lanes:
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shift = self.right_vector - self.turned * lane.get_width(scale)
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path = drawing.path(
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["M", self.point_middle + shift, "L", self.point_2 + shift],
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fill="none",
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stroke="#FFFFFF",
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stroke_width=2,
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stroke_dasharray="7,7",
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)
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drawing.add(path)
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class Intersection:
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"""
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An intersection of the roads, that is described by its parts. All first
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points of the road parts should be the same.
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"""
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def __init__(self, parts: List[RoadPart]):
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self.parts: List[RoadPart] = sorted(parts, key=lambda x: x.get_angle())
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for index in range(len(self.parts)):
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next_index: int = 0 if index == len(self.parts) - 1 else index + 1
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part_1: RoadPart = self.parts[index]
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part_2: RoadPart = self.parts[next_index]
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line_1: Line = Line(
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part_1.point_1 + part_1.right_vector,
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part_1.point_2 + part_1.right_vector,
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)
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line_2: Line = Line(
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part_2.point_1 + part_2.left_vector,
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part_2.point_2 + part_2.left_vector,
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)
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intersection: np.array = line_1.get_intersection_point(line_2)
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# if np.linalg.norm(intersection - part_1.point_2) < 300:
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part_1.right_connection = intersection
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part_2.left_connection = intersection
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part_1.update()
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part_2.update()
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for index in range(len(self.parts)):
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next_index: int = 0 if index == len(self.parts) - 1 else index + 1
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part_1: RoadPart = self.parts[index]
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part_2: RoadPart = self.parts[next_index]
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part_1.update()
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part_2.update()
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if (
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part_1.right_connection is None
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and part_2.left_connection is None
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):
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part_1.left_connection = part_1.right_projection
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part_2.right_connection = part_2.left_projection
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part_1.left_outer = part_1.right_projection
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part_2.right_outer = part_2.left_projection
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part_1.update()
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part_2.update()
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def draw(
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self, drawing: svgwrite.Drawing, scale: float, is_debug: bool = False
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) -> None:
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"""
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Draw all road parts and intersection.
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"""
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inner_commands = ["M"]
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for part in self.parts:
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inner_commands += [part.left_connection, "L"]
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inner_commands[-1] = "Z"
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outer_commands = ["M"]
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for part in self.parts:
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outer_commands += [part.left_connection, "L"]
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outer_commands += [part.left_outer, "L"]
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outer_commands += [part.right_outer, "L"]
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outer_commands[-1] = "Z"
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# for part in self.parts:
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# part.draw_normal(drawing)
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if is_debug:
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drawing.add(
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drawing.path(outer_commands, fill="#0000FF", opacity=0.2)
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)
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drawing.add(
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drawing.path(inner_commands, fill="#FF0000", opacity=0.2)
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)
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for part in self.parts:
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if is_debug:
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part.draw_debug(drawing)
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else:
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part.draw_entrance(drawing)
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if not is_debug:
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# for part in self.parts:
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# part.draw_lanes(drawing, scale)
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drawing.add(drawing.path(inner_commands, fill="#FF8888"))
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