calculate_compound_fps.py

""" 
    Save as calculate_compound_fps.py
    
    run it in the terminal
        $ python calculate_compound_fps.py
    
        $ python calculate_compound_fps.py 340 64 28 420
"""
#!/usr/bin/env python
import sys 

BOW_DEFAULT_ADVERTISED_FPS = 320 

IBO_DEFAULT_DRAW_WEIGHT_LBS = 70 
IBO_DEFAULT_DRAW_LENGTH_INCHES = 30 
IBO_DEFAULT_ARROW_GRAIN = 350 

AVERAGE_DEFAULT_DRAW_WEIGHT_LBS = 60 
AVERAGE_DEFAULT_DRAW_LENGTH_INCHES = 28 
AVERAGE_DEFAULT_ARROW_GRAIN = 425 

def main(advertised_fps, draw_weight_lbs, draw_length_inches, arrow_grain): 
   fps_lost = 0 
   # Lose 10 FPS for every inch of draw length lost 
   fps_lost += (IBO_DEFAULT_DRAW_LENGTH_INCHES - draw_length_inches) * 10 
   # Lose 15-20 FPS for every 10lbs. weight dropped 
   # Since you lose 15-20 FPS, I used 18 which is right in the middle 
   fps_lost += ((IBO_DEFAULT_DRAW_WEIGHT_LBS - draw_weight_lbs) / 10) * 18  
   # Every extra 5 grain is 1.5 FPS lost 
   fps_lost += ((arrow_grain - IBO_DEFAULT_ARROW_GRAIN) / 5) * 1.5 
   # String accessories (d loop, peep hole ~15 grain) 
   fps_lost += 5 
   # IBO is conducted with a machine that has a perfect release. 
   # Human error is about 2-3 FPS lost; say 2.5 
   fps_lost += 2.5 
   return (advertised_fps - fps_lost) 

if __name__ == "__main__": 
   if len(sys.argv) < 2: 
       print ("Advertised FPS: %d" % BOW_DEFAULT_ADVERTISED_FPS) 
       actual_fps = main(BOW_DEFAULT_ADVERTISED_FPS, AVERAGE_DEFAULT_DRAW_WEIGHT_LBS, AVERAGE_DEFAULT_DRAW_LENGTH_INCHES, AVERAGE_DEFAULT_ARROW_GRAIN) 
       print ("Beginner FPS: %d" % actual_fps) 
   else: 
       print ("Advertised FPS: %d" % int(sys.argv[1])) 
       actual_fps = main(int(sys.argv[1]), int(sys.argv[2]), int(sys.argv[3]), int(sys.argv[4])) 
       print ("Beginner FPS: %d" % actual_fps)