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  #1  
Old 05-30-2018, 02:45 PM
Lenticularis Lenticularis is offline
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Join Date: Jul 2016
Posts: 12
Question Accelerated motion

Is there a simple solution to implement accelerated motion in Vizard?

Or do I have to use the normal vizact.move function and combine it with the formula "v = a ∑ t + v"?

Any ideas?
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  #2  
Old 05-30-2018, 03:22 PM
Jeff Jeff is offline
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Posts: 2,378
Are you moving the viewpoint or some objects? Can you describe a bit the application you are creating?
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  #3  
Old 05-31-2018, 06:13 AM
Lenticulariss Lenticulariss is offline
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Objects. I want to move an object (let's say a car) forward for a certain duration and with a certain average velocity. But with accelerated movement, not with constant velocity.

Example: vizact.move(0,0,6, velocity)
--> In this function I can define the direction of movement and the duration of the movement, I can also specify a certain velocity. But now I want to accelerate this movement by let's say 1 m/s^2 (so that the velocity is rising for the specified amount of time)
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  #4  
Old 06-01-2018, 04:38 AM
Lenticularis Lenticularis is offline
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Moving an object.
Vizact.move(0,0,velocity,time) --> I can indicate a velocity and a duration of the movement. How to implement accelerated movement?
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  #5  
Old 06-01-2018, 03:46 PM
Jeff Jeff is offline
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You could apply a force using physics or register a function with vizact.onupdate where the object's position is set each frame.
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  #6  
Old 06-07-2018, 10:57 AM
Lenticularis Lenticularis is offline
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I tried the following code. Do you see mistakes?

Code:
def Movement():
	
	Object.setPosition(0,0,0)
	
	v0 = 0
	t = 0
	a = 1
	
	while t < time:
	
		s = v0*t + 0.5*a*t**2
		vizact.ontimer2(0.1,0,Object.setPosition,0,0,s)
		t = t+0.1
I was not really expecting it to work since it was only a "quick and dirty" solution. But I actually don't see where the problem is.
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  #7  
Old 06-08-2018, 06:00 AM
Lenticularis Lenticularis is offline
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Never mind. Managed to do it with an even simpler solution. It is not entirely precise, but it works quite well. It isn't even shaking. Here is the code I used:

Code:
def Movement():

	Object.setPosition(0,0,0)

	v0 = 0
	t = 0
	a = 5

	while t < time:
	
		s = v0*t + 0.5*a*t**2
		Object.setPosition(0,0,s)
		t = t+0.0168	#Adjustement based on processing speed of computer (lazy amateur workaround)
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