WorldViz User Forum

WorldViz User Forum (https://forum.worldviz.com/index.php)
-   Vizard (https://forum.worldviz.com/forumdisplay.php?f=17)
-   -   Accelerated motion (https://forum.worldviz.com/showthread.php?t=6148)

Lenticularis 05-30-2018 02:45 PM

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?

Jeff 05-30-2018 03:22 PM

Are you moving the viewpoint or some objects? Can you describe a bit the application you are creating?

Lenticulariss 05-31-2018 06:13 AM

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)

Lenticularis 06-01-2018 04:38 AM

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?

Jeff 06-01-2018 03:46 PM

You could apply a force using physics or register a function with vizact.onupdate where the object's position is set each frame.

Lenticularis 06-07-2018 10:57 AM

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.

Lenticularis 06-08-2018 06:00 AM

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)



All times are GMT -7. The time now is 06:19 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
Copyright 2002-2018 WorldViz LLC