stroke_calc_join

procedure stroke_calc_join(

  out_vertices: pod_deque_ptr;

  v0: vertex_dist_ptr;

  v1: vertex_dist_ptr;

  v2: vertex_dist_ptr;

  len1: Double;

  len2: Double;

  Width: Double;

  line_join: unsigned;

  inner_join: unsigned;

  miter_limit: Double;

  inner_miter_limit: Double;

  approximation_scale: Double

);