Viewpoint control - WorldViz User Forum

Vinicius Lima · #1 08-16-2007, 12:04 PM

Hi,

I am working using the viewpoint control tutorial and when I am trying to make the car I modeled in 3d Max I am running into coordinate problems. It seems to work when I have the object positioned at 0,0,0 but when I move it somewhere else, the viewpoint is no longer inside the car. Here is my script:

import viz
viz.go()

#Changing the background color to SKYBLUE
viz.clearcolor(0.5,0.5,1)

#Defining the move and the turn speeds
MOVE_SPEED = 5
TURN_SPEED = 60

#Adding the objects to the world
ground = viz.add('ground.osg')
car = viz.add('car.osg')

#Getting main viewpoint object
view = viz.get(viz.MAIN_VIEWPOINT)

def mytimer(num):

if viz.iskeydown(viz.KEY_UP):
view.move(0,0,MOVE_SPEED*viz.elapsed(),viz.BODY_OR I)
elif viz.iskeydown(viz.KEY_DOWN):
view.move(0,0,-MOVE_SPEED*viz.elapsed(),viz.BODY_ORI)

if viz.iskeydown(viz.KEY_RIGHT):
view.rotate(0,1,0,TURN_SPEED*viz.elapsed(),viz.BOD Y_ORI,viz.RELATIVE_WORLD)
elif viz.iskeydown(viz.KEY_LEFT):
view.rotate(0,1,0,-TURN_SPEED*viz.elapsed(),viz.BODY_ORI,viz.RELATIVE _WORLD)

updatecar()

def updatecar():
car.translate(view.get(viz.HEAD_POS))
car.rotate(view.get(viz.BODY_AXISANGLE))
car.translate(0.35,-1.2,0.2,viz.RELATIVE_LOCAL)
#def updatecar():
# car.translate(view.get())
# car.rotate(view.getAxisAngle(viz.BODY_ORI))
# car.translate(0.35,-1.2,0.2,viz.RELATIVE_LOCAL)

def mousemove(e):
euler = view.getEuler(viz.HEAD_ORI)
euler[0] += e.dx*0.1
euler[1] += -e.dy*0.1
euler[1] = viz.clamp(euler[1],-85.0,85.0)
view.rotate(euler,viz.HEAD_ORI)

def mousedown(button):
if button == viz.MOUSEBUTTON_LEFT:
view.reset(viz.HEAD_ORI)
elif button == viz.MOUSEBUTTON_RIGHT:
view.reset(viz.BODY_ORI|viz.HEAD_POS)
updatecar()

viz.callback(viz.TIMER_EVENT,mytimer)
viz.starttimer(0,0.01,viz.FOREVER)

viz.callback(viz.MOUSE_MOVE_EVENT,mousemove)
viz.callback(viz.MOUSEBUTTON_EVENT,mousedown)

viz.mouse(viz.OFF)
viz.cursor(viz.OFF)
viz.restrictmouse(viz.ON)

Thanks,

Vinicius

farshizzo · #2 08-16-2007, 03:24 PM

Can you please repost the code using the [code][/code] tags. It will preserve the formatting and make it easier for me to test your script. Thanks.

Vinicius Lima · #3 08-16-2007, 03:30 PM

PHP Code:


			
import viz

viz.go()



#Changing the background color to SKYBLUE

viz.clearcolor(0.5,0.5,1)



#Defining the move and the turn speeds

MOVE_SPEED = 5

TURN_SPEED = 60



#Adding the objects to the world

ground = viz.add('ground.osg')

car = viz.add('car.osg')



#Getting main viewpoint object

view = viz.get(viz.MAIN_VIEWPOINT)



def mytimer(num):

    

    if viz.iskeydown(viz.KEY_UP):

        view.move(0,0,MOVE_SPEED*viz.elapsed(),viz.BODY_ORI)

    elif viz.iskeydown(viz.KEY_DOWN):

        view.move(0,0,-MOVE_SPEED*viz.elapsed(),viz.BODY_ORI)

        

    if viz.iskeydown(viz.KEY_RIGHT):

        view.rotate(0,1,0,TURN_SPEED*viz.elapsed(),viz.BODY_ORI,viz.RELATIVE_WORLD)

    elif viz.iskeydown(viz.KEY_LEFT):

        view.rotate(0,1,0,-TURN_SPEED*viz.elapsed(),viz.BODY_ORI,viz.RELATIVE_WORLD)



    updatecar()

    

def updatecar():

  car.translate(view.get(viz.HEAD_POS))

  car.rotate(view.get(viz.BODY_AXISANGLE))

  car.translate(0.35,-1.2,0.2,viz.RELATIVE_LOCAL)

#def updatecar():

#    car.translate(view.get())

#    car.rotate(view.getAxisAngle(viz.BODY_ORI))

#    car.translate(0.35,-1.2,0.2,viz.RELATIVE_LOCAL)

    

def mousemove(e):

    #euler = view.getEuler(viz.HEAD_ORI)

    euler = view.get(viz.HEAD_EULER)

    euler[0] += x*0.1

    euler[1] += -y*0.1

    euler[1] = viz.clamp(euler[1],-90.0,90.0)

    view.rotate(euler,viz.HEAD_ORI)



def mousedown(button):

    if button == viz.MOUSEBUTTON_LEFT:

        view.reset(viz.HEAD_ORI)

    elif button == viz.MOUSEBUTTON_RIGHT:

        view.reset(viz.BODY_ORI|viz.HEAD_POS)

        updatecar()





viz.callback(viz.TIMER_EVENT,mytimer)

viz.starttimer(0,0.01,viz.FOREVER)



viz.callback(viz.MOUSEMOVE_EVENT,mousemove)

viz.mousedata(viz.RELATIVE,viz.RELATIVE)

viz.setMouseOverride()

viz.cursor(viz.OFF)



viz.callback(viz.MOUSEBUTTON_EVENT,mousedown)



viz.mouse(viz.OFF)

viz.restrictmouse(viz.ON)

farshizzo · #4 08-17-2007, 04:49 PM

I tried your script but there were some errors with it. I fixed the errors and it works for me now. Can you try the following code:

Code:

import viz
viz.go()

#Changing the background color to SKYBLUE
viz.clearcolor(0.5,0.5,1)

#Defining the move and the turn speeds
MOVE_SPEED = 5
TURN_SPEED = 60

#Adding the objects to the world
ground = viz.add('tut_ground.wrl')
car = viz.add('mini.osgx')

#Getting main viewpoint object
view = viz.get(viz.MAIN_VIEWPOINT)

def mytimer(num):
    
    if viz.iskeydown(viz.KEY_UP):
        view.move(0,0,MOVE_SPEED*viz.elapsed(),viz.BODY_ORI)
    elif viz.iskeydown(viz.KEY_DOWN):
        view.move(0,0,-MOVE_SPEED*viz.elapsed(),viz.BODY_ORI)
        
    if viz.iskeydown(viz.KEY_RIGHT):
        view.rotate(0,1,0,TURN_SPEED*viz.elapsed(),viz.BODY_ORI,viz.RELATIVE_WORLD)
    elif viz.iskeydown(viz.KEY_LEFT):
        view.rotate(0,1,0,-TURN_SPEED*viz.elapsed(),viz.BODY_ORI,viz.RELATIVE_WORLD)

    updatecar()
    
def updatecar():
  car.translate(view.get(viz.HEAD_POS))
  car.rotate(view.get(viz.BODY_AXISANGLE))
  car.translate(0.35,-1.2,0.2,viz.RELATIVE_LOCAL)
#def updatecar():
#    car.translate(view.get())
#    car.rotate(view.getAxisAngle(viz.BODY_ORI))
#    car.translate(0.35,-1.2,0.2,viz.RELATIVE_LOCAL)
    
def mousemove(e):
    #euler = view.getEuler(viz.HEAD_ORI)
    euler = view.get(viz.HEAD_EULER)
    euler[0] += e.dx*0.1
    euler[1] += -e.dy*0.1
    euler[1] = viz.clamp(euler[1],-90.0,90.0)
    view.rotate(euler,viz.HEAD_ORI)

def mousedown(button):
    if button == viz.MOUSEBUTTON_LEFT:
        view.reset(viz.HEAD_ORI)
    elif button == viz.MOUSEBUTTON_RIGHT:
        view.reset(viz.BODY_ORI|viz.HEAD_POS)
        updatecar()


viz.callback(viz.TIMER_EVENT,mytimer)
viz.starttimer(0,0.01,viz.FOREVER)

viz.callback(viz.MOUSE_MOVE_EVENT,mousemove)

viz.setMouseOverride()
viz.cursor(viz.OFF)

viz.callback(viz.MOUSEBUTTON_EVENT,mousedown)

viz.mouse(viz.OFF)
viz.restrictmouse(viz.ON)

Vinicius Lima · #5 08-17-2007, 05:20 PM

HI farshizzo,

Thanks for your help. I tried your script using the files I modeled in 3ds Max instead of the ones with the tutorials and the problem remained. I'll double check my models and I'll let you know.

Thanks

Vinicius

Vinicius Lima · #6 08-20-2007, 09:53 AM

Hello,

Even after double checking the files and the script it is not working. So, I was wondering if when I am exporting as .osg files I am not clicking one of the options or I am not doing it right. This has happened a couple of times already and I tried everything thinking the problem was in the script but my script is exactly like the one I got from you. So, I am guessing the problem is in the modeling. Could you help me?

Thanks,

Vinicius

farshizzo · #7 08-20-2007, 06:51 PM

I don't really understand what the problem is. You will need to post your model so I can test it out myself. If you prefer, you can email the model to lashkari@worldviz.com

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