Arc Length Script

Technical Questions URScript
1

Does anyone have a script that returns the length of a MoveC? I could take the distance between start and via and add this to the distance between the via and the end, but this won’t be exact. I don’t think there’s a built-in function for this, but if I’ve missed it, I’d appreciate if someone could point it out. Otherwise I’ll try writing one myself.

2

@eric.feldmann Did you find the answer to this? :slight_smile:

3 
def calculate_arc_length(p1, p2, p3):
  a = point_dist(p3, p2)
  b = point_dist(p3, p1)
  c = point_dist(p2, p1)
  r = (a*b*c) / (sqrt((2*pow(a,2)*pow(b,2))+(2*pow(b,2)*pow(c,2))+(2*pow(c,2)*pow(a,2))-pow(a,4)-pow(b,4)-pow(c,4)))
  theta1 = acos(1-(pow(c,2)/(2*pow(r,2))))
  theta2 = acos(1-(pow(a,2)/(2*pow(r,2))))
  arc_length1 = r*theta1
  arc_length2 = r*theta2
  return (arc_length1 + arc_length2)
end

This is what I’ve been using. No promises that this is very efficient, but it’s been working for me. Just need to pass it the Start, Via, and End positions.

1 Like
4

Thank you so much! it is really helpfull!