Proximity event when avatar enters

[BSUGeek]

Hi I need help trying to figure out how can you tell when an avatar enters a proximity sensor. Once the avatar enters the proximity its health is supposed to deplete. I'm not really sure where to start. Is there a way to tell when a sensor enters another sensor?

[Erikvdb]

Just make your avatar a vizproximity Target

target = vizproximity.Target(avatar)
manager.addTarget(target)

def EnterProximity(e):
    if e.target == target:
        print "Avatar is losing health"

manager.onEnter(None, EnterProximity)

*Code assumes you have already set up your proximity manager, avatar and sensor(s).

[BSUGeek]

Oh! Wow thanks! I had no idea we could do that!

[sportykourty]

So I was trying to incorporate the previous code but I'm stuck. does my sensor and target have to be in the same manager? I'm not really sure what I'm doing wrong but the function never executes.

sensor = vizproximity.Sensor(vizproximity.Sphere(15,center = [72,-.57,2]), source = avatar1)
manager.addSensor(sensor)

Avatar2Target = vizproximity.Target(avatar2)
Avatar2Manager.addTarget(Avatar2Target)

def HealthLoss(e):
	if e.target == Avatar2Target:
		print "Sensor Entered"
Avatar2Manager.onEnter(sensor1, HealthLoss)

[Erikvdb]

Originally Posted by sportykourty

So I was trying to incorporate the previous code but I'm stuck. does my sensor and target have to be in the same manager? I'm not really sure what I'm doing wrong but the function never executes.

Yes, all targets and sensors that interact with each other have to be assigned to the same manager.

Here's a complete code example:

import viz
import vizact
import vizproximity

# Physical Objects
ball = viz.addChild('beachball.osgb',pos=[-1,0.2,0])
avatar = viz.addAvatar('vcc_male2.cfg',pos=[1,0,0])
avatar.setEuler([180,0,0])
avatar.state(5)

# Proximity Management
manager = vizproximity.Manager()
manager.setDebug(viz.ON)

sensor = vizproximity.Sensor(vizproximity.Sphere(0.5, center=[0,0,0]), ball)
manager.addSensor(sensor)

target = vizproximity.Target(avatar)
manager.addTarget(target)

def healthLoss(e):
	if e.target == target:
		print "Sensor Entered"
		
manager.onEnter(sensor, healthLoss)

# Demo
def update():
	if viz.key.isDown(viz.KEY_LEFT):
		avatar.setPosition([-2*viz.elapsed(),0,0],viz.REL_GLOBAL)
	elif viz.key.isDown(viz.KEY_RIGHT):
		avatar.setPosition([2*viz.elapsed(),0,0],viz.REL_GLOBAL)
		
vizact.ontimer(0,update)

viz.MainView.setPosition([0,1,-4])
viz.go()

Use arrow keys to move the avatar to the ball.
Created in Vizard 4.

[sportykourty]

Wow thanks! that's really helpful. So if I want the health to continue to drop until I exit the proximity would i just do a While(true) loop?

[Erikvdb]

Originally Posted by sportykourty

Wow thanks! that's really helpful. So if I want the health to continue to drop until I exit the proximity would i just do a While(true) loop?

No, entering and exiting a proximity are two separate events. Use them to toggle a state that you can check for in the general update loop.

health = 100
healthloss = False

def onEnter(e):
	if e.target == target:
		healthloss = True
		
def onExit(e):
	if e.target == target:
		healthloss = False
		
manager.onEnter(sensor, onEnter)
manager.onExit(sensor, onExit)

# Demo
def update():
	if healthloss:
		health -= 2 * viz.elapsed()