add text to sphere

[maya]

hi,

I am very new to Vizard.
I am facing difficulties with adding a 2D text to a sphere. I want the text to appear on the top of the sphere when the user enters 't' ,for example, from the keyboard.

I have tried many tutorials but I did not know how to do it.


your help is appreciated.

[Jeff]

You can set the sphere to be the parent of the text:

import viz
import vizshape
import vizact
viz.go()

sphere = vizshape.addSphere(radius=0.2)
text = viz.addText('Sphere',parent=sphere)
text.setPosition([-0.3,0.3,0])
text.setScale([0.2]*3)
text.visible(viz.OFF)

vizact.onkeydown('t',text.visible,viz.TOGGLE)

import vizcam
cam = vizcam.PivotNavigate(distance=3)
cam.centerNode(text)

[maya]

thanks a lot it worked.

I have another question, how can I calculate the distance between 2 objects?

for example, lets say that the position of the sphere is (0,0,20) and when the avatar reaches a distance 1 meter far from the sphere, I want the text to appear.

[Frank Verberne]

Hi Maya,

Sounds like you can use a proximity sensor. If you set your sphere as the source of the sensor in the example below, you can do something when someone enters the area (or leaves the area). See http://docs.worldviz.com/vizard/vizproximity.htm for more info.

import viz
import vizproximity

viz.go()
male = viz.addAvatar('vcc_male2.cfg', pos = [0,.15,.5], euler = [180,0,0])

#Create proximity manager 
manager = vizproximity.Manager()

#Create target and add to manager
target = vizproximity.Target(viz.MainView)
manager.addTarget(target)

#Create sensor and add to manager
sensor = vizproximity.Sensor( vizproximity.CircleArea(1),source=male)
manager.addSensor(sensor)

def EnterProximity(e):
    """@args vizproximity.ProximityEvent()"""
    print 'entered',e.sensor

def ExitProximity(e):
    """@args vizproximity.ProximityEvent()"""
    print 'exited',e.sensor

manager.onEnter(None,EnterProximity)
manager.onExit(None,ExitProximity)

[maya]

hi,

thanks for ur replay.
I get an error when I ran the example.
this is the error:

sensor = vizproximity.Sensor( vizproximity.CircleArea(1),source=male)
AttributeError: 'module' object has no attribute 'CircleArea'

[Jeff]

Make sure you have the latest version of Vizard. Go to Help > Check for Updates.

[maya]

I installed the latest version and the code worked. thanx a lot.

I added this code in a multi user environment with 1 server and 2 clients.
I added the code in client 1 specifically, but once I run the client, the message appears immediately even though the avatar is very far from the target (radiation source).
could you help me with this issue plz?

this is my code for client:

import viz
import viznet
import vizinfo
import vizinput
import viztask
import vizact
import vizshape
import vizproximity

viz.go()
viz.MainView.setPosition([0,0.1,0])
#viz.MainView.lookAt([50,25,-40])
#Enable full screen anti-aliasing (FSAA) to smooth edges
viz.setMultiSample(4)
#Increase the Field of View
viz.MainWindow.fov(60)
piazza = viz.add('piazza.osgb')
#maze = viz.add('tankmaze.wrl')

sphere = vizshape.addSphere(radius=0.2)
sphere.setPosition(0,0,20)
sphere.color(viz.RED)

text = viz.addText('radiation source',parent=sphere)
text.setPosition([-0.3,0.3,0])
text.setScale([0.2]*3)
text.color(viz.RED)
text.visible(viz.ON)

text_2D = viz.addText('radiation source area', viz.SCREEN )
text_2D.setPosition(0,0,20)
text_2D.color(viz.RED)



objects = {}

#
UPDATE = viznet.id('update') 
CLIENT_DISCONNECTED = viznet.id('client_disconnected') 
CHAT = viznet.id('chat') 

#
SERVER_NAME=vizinput.input('Enter Server Name') 
while not viznet.client.connect(SERVER_NAME,port_in=14951,port_out=14950): 
    if vizinput.ask('Could not connect to ' + SERVER_NAME + ' would you like to try another?'): 
        SERVER_NAME=vizinput.input('Enter Server Name') 
    else: 
        viz.quit() 
        break 
#
objectList = ['duck.wrl','logo.wrl','vcc_male.cfg','vcc_female.cfg'] 
obj_choice=vizinput.choose('Connected. Select your character',objectList) 


#
#Create proximity manager
manager = vizproximity.Manager()
#manager.setDebug(viz.ON)

#Add main viewpoint as proximity target
target = vizproximity.Target(viz.MainView)
manager.addTarget(target)

#Create sensor using male avatar
#avatar = viz.addAvatar('vcc_male2.cfg',pos=[0,0,4],euler=[180,0,0])
#avatar.state(1)

#sensor = vizproximity.Sphere(0.2, centre=(0,0,0))
sensor = vizproximity.Sensor( vizproximity.CircleArea(0.1),source=sphere)

manager.addSensor(sensor)

#Change state of avatar to talking when the user gets near
def EnterProximity(e):
 
 text_2D.visible(viz.ON)
    
    #text.visible(viz.ON)

#Change state of avatar to idle when the user moves away
def ExitProximity(e):
    #text.visible(viz.OFF)
 text_2D.visible(viz.OFF)

manager.onEnter(sensor,EnterProximity)
manager.onExit(sensor,ExitProximity)
     
#vizact.onkeydown('d',manager.setDebug,viz.TOGGLE) 

#
def sendUpdate():
     ori= viz.MainView.getEuler()
     pos = viz.MainView.getPosition()
     viznet.client.sendAll(UPDATE,client=viz.getComputerName(),object=obj_choice,pos=pos,ori=ori)
vizact.ontimer(.05,sendUpdate)

#
def update(e): 
    if e.client != viz.getComputerName(): 
        try: 
            objects[e.client].setPosition(e.pos) 
            objects[e.client].setEuler(e.ori) 
        except KeyError: 
            objects[e.client] = viz.add(objectList[e.object],scale=[2,2,2],pos=e.pos,euler=e.ori) 
            objects[e.client].tooltip = e.client 
viz.callback(UPDATE,update) 

#
def client_disconnected(e): 
    objects[e.client].remove() 
    del objects[e.client] 
viz.callback(CLIENT_DISCONNECTED,client_disconnected) 

def onStopServer(e): 
    print 'Disconnected from server' 
    viz.quit() 
viz.callback(viznet.SERVER_DISCONNECT_EVENT,onStopServer) 

#
import viztip 
tth = viztip.ToolTip() 
tth.start() 
tth.setDelay(0) 

#
def updateChat(msg): 
    text.message('\n'.join(text.getMessage().split('\n')[1:])+'\n'+msg) 

text = viz.addText('\n\n\n\n',viz.SCREEN) 
text.alignment(viz.TEXT_LEFT_BOTTOM) 
text.fontSize(25) 
text.setPosition(.05,.08) 

input = viz.addText('> _',viz.SCREEN) 
input.fontSize(25) 
input.setPosition(.032,.05) 
input.visible(0) 

def onChat(e): 
    updateChat(e.client+': '+e.chat) 
viz.callback(CHAT,onChat) 

talking = False 
def onKeyDown(key): 
    global talking 
    if key == 'y' and not talking: 
        talking = True 
        input.message('> _') 
        input.visible(1) 
    elif key == viz.KEY_ESCAPE and talking: 
        talking = False 
        input.visible(0) 
        return True 
    elif talking and key == viz.KEY_RETURN: 
        talking = False 
        viznet.client.sendAll(CHAT,client=viz.getComputerName(),chat=input.getMessage()[2:-1]) 
        input.visible(0) 
    elif talking and key == viz.KEY_BACKSPACE: 
        if len(input.getMessage()) > 3: 
            input.message(input.getMessage()[:-2]+'_') 
    elif len(key) > 1: 
        return False 
    elif talking and 32 <= ord(key) <= 126: 
        input.message(input.getMessage()[:-1]+key+'_') 
viz.callback(viz.KEYDOWN_EVENT,onKeyDown,priority=-6)

thanx in advance.

[Frank Verberne]

Hi Maya,

You forgot to make text_2D invisible in the beginning.

text_2D = viz.addText('radiation source area', viz.SCREEN )
text_2D.setPosition(0,0,20)
text_2D.color(viz.RED)
text_2D.visible(viz.OFF)

Furthermore: note that your indentation of your EnterProximity and ExitProximity functions is not a tab, but two spaces. Python does not mind it that much, but it would be more consistent to use one tab as indentation level throughout your code.

[maya]

hi Frank,

thanx for ur replay. I made the text invisible. but now, the text does not appear at all.

am I doing something wrong?

one more thing. in my case I have 1 server and 2 clients, I want the text to appear when either one of the clients (or both) reaches the radiation source.

where do u recommend me to add the code for the proximity? (in client1 and client2 or in server side)?