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Module: geometry ../bkchem/oasa/oasa/geometry.py

support module for some geometric mesurements ( geometric tramforms are in transform.py)

Functions   
angle_between_lines
clockwise_angle_from_east
do_rectangles_intersect
find_parallel
get_parallel_distance
get_parallel_signum
intersection_of_line_and_rect
line_length
on_which_side_is_point
point_distance
point_on_circle
rectangle_intersection
  angle_between_lines 
angle_between_lines ( l1,  l2 )

returns angle between two lines

  clockwise_angle_from_east 
clockwise_angle_from_east ( dx,  dy )

returns the angle in clockwise direction between the center-east line and direction

  do_rectangles_intersect 
do_rectangles_intersect ( rect1,  rect2 )

  find_parallel 
find_parallel (
        x1,
        y1,
        x2,
        y2,
        d,
        )

returns tuple of coordinates for parallel abscissa in distance d

  get_parallel_distance 
get_parallel_distance ( l1,  l2 )

returns distance of two parallels - does not check whether the two are really parallels

  get_parallel_signum 
get_parallel_signum ( l1,  l2 )

  intersection_of_line_and_rect 
intersection_of_line_and_rect (
        line,
        rect,
        round_edges=0,
        )

finds a point where a line and a rectangle intersect, both are given as lists of len == 4

  line_length 
line_length ( ( )

  on_which_side_is_point 
on_which_side_is_point (
        line,
        point,
        threshold=0,
        )

tells whether a point is on one side of a line or on the other (1,0,-1) - 0 is for point on line. line is given as sequence of four coordinates, point as sequence of two coords, threshold means what smallest angle is considered to still be on the line

  point_distance 
point_distance (
        x1,
        y1,
        x2,
        y2,
        )

  point_on_circle 
point_on_circle (
        center_x,
        center_y,
        radius,
        direction=(),
        resolution=15,
        )

finds point on circle in direction of (dx, dy), optionaly rounds the angle according to resolution

  rectangle_intersection 
rectangle_intersection ( rect1,  rect2 )


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