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CSH2012 FINAL ballistics03.py

calcpage Jun 21st, 2013 74 Never
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  1. #!/usr/bin/python
  2. #ballistics03.py    MrG     2013.0531
  3. #inspired by http://vpython.erikthompson.com
  4. #horizontal and vertical displacement given velocity vector from the ground like a cannon!
  5. #position is a vector!
  6. from visual import *
  7.  
  8. scene.width=800
  9. scene.height=600
  10. scene.autoscale=0
  11. scene.range=(100,100,100) #(l,w,h)
  12. scene.center=(50,40,0) #pos vector
  13.  
  14. ball=sphere(pos=(0,2,0),radius=2,color=color.red)
  15. ground=box(pos=(50,-1,0),size=(100,2,10),color=color.green)
  16.  
  17. g=9.8 #m/s/s
  18. vel=40 #m/s
  19. ang=80 #degrees
  20. ang=ang*pi/180 #radians
  21. vx=vel*cos(ang)
  22. vy=vel*sin(ang)
  23. t=0
  24. dt=0.01
  25.  
  26. finished=False
  27. while not finished:
  28.     rate(100) #loop 100 times per sec
  29.     t+=dt
  30.     x=vx*t #x(t)=vx0*t+x0
  31.     y=-0.5*g*t**2+0*t+vy*t+2 #y(t)=-g*t^2/2+vy0*t+y0
  32.     print "t= " + str(t) + " x= " + str(x) + " y= " + str(y)
  33.     ball.pos=(x,y,0)
  34.     if y-2<0:
  35.         finished=True
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