VPython - example - 模拟自由落体运动

本作品采用知识共享署名-非商业性使用-相同方式共享 3.0 Unported许可协议进行许可。允许非商业转载，但应注明作者及出处。

作者：liuyuan_jq

2011-04-10

From http://wiki.showmedo.com/index.php/PythonThompsonVPythonSeries

 

from visual import * scene.width = 400 scene.height = 300 scene.autoscale = 0 scene.range = (100,100,100) scene.center = (0,40,0) ball = sphere(pos=(0,100,0),radius=2) ground = box(pos=(0,-1,0),size=(10,2,10)) gravity = 9.8 # m/s**2 seconds = 0 dt = .01 finished = False while not finished: rate(100) # go thru the loop no more than 100 times/s seconds += dt # position equation: y(t) = y0 + v0*t + .5 * a * t**2 ballHeight = 100 - .5 * gravity * seconds**2 ball.pos = vector(0,ballHeight,0) if ballHeight - 2 < 0: finished = True print "seconds to fall: " + str(seconds)