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speed on animation path
Hello Jeff,
Previously you helped me out with the problem that how to get the position of an object two seconds ahead. Thanks a lot. Here is the code with slight change on your code, in which a semi-transparent ball two seconds ahead of another ball on animation path. I have a question about their speed. Why the speed of balls changes a lot along the animation path although I used path.constantspeed(viz.ON,4). How can I get a smooth constant speed? Thanks. import viz viz.go() viz.add('tut_ground.wrl') ball = viz.add('ball.wrl') ball.alpha(.5) ball2 = viz.add('ball.wrl') viz.MainView.move(0,3,-30) path = viz.add(viz.ANIMATION_PATH) path2 = viz.add(viz.ANIMATION_PATH) positions = [ [2,0.15,50], [1,0.15,35], [0,0.15,25], [-4,0.15,15], [-10,0.15,8], [-25,0.15,0], [-15,0.15,-8], [-10,0.15,-10], [-6,0.15,-12], [-3,0.15,-15], [0,0.15,-18], [3,0.15,-16], [6,0.15,-8], [10,0.15,2], [15,0.15,0], [25,0.15,-12], [35,0.15,-12], [50,0.15,-12], [70,0.15,10], [90,0.15,30], [140,0.15,120] ] for x in range(0,len(positions)): cp = viz.add(viz.CONTROL_POINT) cp.setPosition(positions[x]) path.add(cp,x+1) path2.add(cp,x+1) path.constantspeed(viz.ON,4) path2.constantspeed(viz.ON,4) path.loop(viz.OFF) path2.loop(viz.OFF) path.translatemode(viz.BEZIER) path2.translatemode(viz.BEZIER) path.setAutoRotate(viz.ON) path2.setAutoRotate(viz.ON) #Link ball and ball2 to their paths ball.link(path) ball2.link(path2) #start playing the first animation path immediately path.play() #start playing the second animation path after two seconds vizact.ontimer2(2, 1, path2.play) |
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