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  #1  
Old 03-16-2015, 11:36 AM
BSUGeek BSUGeek is offline
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Posts: 23
Question Help with the slider

I'm having trouble using the slider to change the speed of my viewpoints movement. While i'm moving i want to be able to use the slider to increase or decrease my movement speed. How can i do that?
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  #2  
Old 03-16-2015, 11:47 AM
shivanangel shivanangel is offline
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Location: New Jersey
Posts: 180
What are you using to move around?
Just grab the sliders value

pos = slider.get()

Multiply by some movement speed to make the value larger than 0 to 1

Set the speed equal to the newly calculated rate/force/speed/etc.. you are using to move around the environment with.
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  #3  
Old 03-16-2015, 12:04 PM
BSUGeek BSUGeek is offline
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Here's the code i have so far. I'm not sure how i should have my move_speed increase and decrease with the slider

Code:
MOVE_SPEED = 60
TURN_SPEED = 60

sliderPanel = vizinfo.InfoPanel(text=None, icon=False)
slider = sliderPanel.addLabelItem('Speed', viz.addSlider())
slider.set(0)

def mySlider(pos):
      ????
      ????

vizact.onslider(slider,mySlider)

def updatecar():

    #move view forward and backward
    if viz.key.isDown(viz.KEY_DOWN):
        view.move([0,0,MOVE_SPEED*viz.elapsed()],viz.BODY_ORI)
    if viz.key.isDown(viz.KEY_UP):
        view.move([0,0,-MOVE_SPEED*viz.elapsed()],viz.BODY_ORI)

	#rotate body of view left and right
    if viz.key.isDown(viz.KEY_RIGHT):
        view.setEuler([TURN_SPEED*viz.elapsed(),0,0],viz.BODY_ORI,viz.REL_PARENT)
    elif viz.key.isDown(viz.KEY_LEFT):
        view.setEuler([-TURN_SPEED*viz.elapsed(),0,0],viz.BODY_ORI,viz.REL_PARENT)
vizact.ontimer(0,updatecar)
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  #4  
Old 03-16-2015, 12:09 PM
shivanangel shivanangel is offline
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Join Date: Feb 2006
Location: New Jersey
Posts: 180
For the easy way out, you can read the state of the slider in the updateCar method.

If you multiply the movement speed by the slider value, it will allow you to scale between 0 and your max speed, which is 60 in this case.

view.move([0, 0, MOVE_SPEED*slider.get()*viz.elapsed()], viz.BODY_ORI)

Do this for each movement call you make. You are now scaling the speed of the car by the amount of time since the last update and the value of the slider.

Last edited by shivanangel; 03-16-2015 at 12:13 PM.
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  #5  
Old 03-16-2015, 12:15 PM
BSUGeek BSUGeek is offline
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Posts: 23
Thumbs up

that worked great! thanks alot for your help!
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  #6  
Old 03-16-2015, 12:19 PM
BSUGeek BSUGeek is offline
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Posts: 23
Is there a way to show your speed on the screen as it's changing?
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  #7  
Old 03-16-2015, 12:23 PM
shivanangel shivanangel is offline
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Join Date: Feb 2006
Location: New Jersey
Posts: 180
Create a text object on the screen.
Look up text node basics in the Vizard help file.
Grab the value and set the text equal to it.
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