VPython - example - 模拟斜上抛运动 （X - Y 轴）

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

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from visual import *scene.width = 400scene.height = 300scene.autoscale = 0scene.range = (100,100,100)scene.center = (50,40,0)ball = sphere(pos=(0,2,0),radius=2, color=color.green)ground = box(pos=(50,-1,0),size=(100,2,10))gravity = 9.8 # m/s**2velocity = 25 # m/sangle = 45 # degreesangle = angle * (pi/180) # converted to radians# sin = opp / hyp# cos = adj / hyp# therefore# opp = hyp * sin# adj = hyp * cosVelocityY = velocity * sin(angle)VelocityX = velocity * cos(angle)seconds = 0dt = .01finished = Falsewhile 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 ballY = 2 + VelocityY * seconds - .5 * gravity * seconds**2 ballX = VelocityX * seconds ball.pos = vector(ballX,ballY,0) if ballY - 2 <= 0: finished = True print "initial velocity: " + str(velocity) print "angle thrown: " + str(angle) print "seconds in flight: " + str(seconds) print "distance in the x direction: " + str(ballX)