WorldViz User Forum - Help with applying force

Hi. I am new to programing in vizard, or programing as a whole. I have an asignment to add support to a ball, and to apply force on the ball, to make her move from from her support. Original program is:

Code:

"""

Student: Ognjan Luzanin

Simulacija klackalice.

Pritisni razmaknicu za resetovanje scene.

"""

import viz

import vizact



viz.setMultiSample(4)

viz.fov(60)

viz.go()



viz.phys.setGravity(0,-9.81,0)



import vizinfo

vizinfo.InfoPanel(align=viz.ALIGN_RIGHT_BOTTOM)



#Bojimo pozadinu u svetlo plavu boju

viz.clearcolor( 0,.5,1 )



#Onesposobljavamo delovanje sila

viz.phys.enable()



#Dodajemo podlogu

podloga = viz.addChild('tut_ground.wrl')

podloga.collidePlane() #Kontrola kolizije (omogucava da se telo ponasa kao cvrsto telo)



#Dodajemo dasku za klackalicu

daska = viz.addChild('box.wrl')

daska.setScale([10,0.3,1])

daska.collideBox() #Kontrola kolizije (omogucava da se telo ponasa kao cvrsto telo)



#Dodajemo oslonac za klackalicu 

oslonac = viz.addChild('tut_cone.wrl')

oslonac.setScale([0.5,0.5,0.5])

oslonac.setPosition([0,0.01,1])

oslonac.collideMesh() #Kontrola kolizije (omogucava da se telo ponasa kao cvrsto telo)

oslonac.disable( viz.DYNAMICS ) #Iskljucujemo dinamicke sile za oslonac (nece reagovati na dejstvo sila prilikom udara tega i kontratega)



#Dodajemo teg

teg = viz.addChild('white_ball.wrl')

teg.setScale(3,3,3)

teg.collideBox(density=10)

teg.disable(viz.DYNAMICS)



#Dodajemo kontrateg

kontrateg = viz.addChild('box.wrl')

kontrateg.color(viz.YELLOW)

kontrateg.collideBox(density=5) #The high density parameter makes the object heavier



#Podesavamo pogled na scenu, tako da sve bude obuhvaceno vidnim poljem 

viz.MainView.setPosition([0,2,-10])



#Sve elemente scene postavljamo u pocetni polozaj

def reset():

        daska.reset() #Ponistava prethodno dejstvo svih sila

        daska.setPosition([0,3,5])

        daska.setEuler([0,0,0]) 



        teg.reset()

        teg.setPosition([4,5,5])

        teg.setEuler([0,0,0])

        teg.disable(viz.DYNAMICS)



        kontrateg.reset()

        kontrateg.setPosition([-4, 9, 5])

        kontrateg.setEuler([90,0,0])

        kontrateg.disable(viz.DYNAMICS)



def start():

        teg.enable(viz.DYNAMICS)

        kontrateg.enable(viz.DYNAMICS)



#Resetujemo simulaciju i spremni smo za pocetak rada

reset()



#Osposobljavamo simulaciju da reaguje na oznacene tastere

vizact.onkeydown(' ', reset)

vizact.onkeydown('s', start)

I put the support like this:

Code:

#Dodajemo oslonac za teg

oslonac1 = viz.addChild('box.wrl')

oslonac1.setEuler([90,180,0])

oslonac1.setScale(4,0.5,4)

oslonac1.collideBox(density=5)

oslonac1.setPosition([5.8,4.45,5])

oslonac1.disable(viz.DYNAMICS)

nogica1 = viz.addChild('pole.wrl',parent=oslonac1)

nogica1.setPosition([0.5,0.5,0])

nogica1.collideBox(density=10)

nogica1.disable(viz.DYNAMICS)

nogica2 = viz.addChild('pole.wrl',parent=oslonac1)

nogica2.setPosition([-0.5,0.5,0,])

nogica2.collideBox(density=10)

nogica2.disable(viz.DYNAMICS)

When i try to scale nogica1 or nogica2 it just goes crazy. Since i dont know how scaling works. I tried looking in help section, but its like alien to me. :(

When i tried aplying the force with

Code:

teg.applyForce(dir=[-10*tegForce.get(),0,0],duration=0.1)

it does nothing. If someone could help me with this, i would be soooooo grateful. :D