offset_path.py

from math import radians, degrees
import fullcontrol as fc
import lab.fullcontrol as fclab

def offset_path_gist(points: list, offset: float, flip: bool = False) -> list:
  if flip: offset = -offset
  offset_lines = []
  for i in range(len(points)-1):
    line = [points[i], points[i+1]]
    line_direction = fc.point_to_polar(line[1], line[0]).angle
    offset_line_direction = line_direction + radians(90)
    vector = fc.polar_to_vector(offset, offset_line_direction)
    offset_lines.append(fc.move(line, vector))

  offset_lines = [offset_lines[-1]] + offset_lines + [offset_lines[0]]
  intersection_points = []
  for i in range(len(offset_lines)-1):
    intersection_points.append(fclab.line_intersection_by_points_XY(offset_lines[i][0], offset_lines[i][1], offset_lines[i+1][0], offset_lines[i+1][1]))
  return intersection_points