"""
This script will demonstrate how to manually animate an object using timers.
"""
import viz
import vizact
import math

viz.setMultiSample(4)
viz.fov(60)
viz.go()

import vizinfo
vizinfo.InfoPanel()

#The speed of the timer.  A value of 0 means the timer function
#Will be called every frame
UPDATE_RATE = 0

#The speed of the translation
SPEED = 50.0

#A variable to hold the angle
angle = 0

#Add a ground plane
viz.addChild('ground.osgb')

#Add a model to rotate
h = viz.addChild('tut_hedra.wrl')

#Place the model in front of the viewer
h.setPosition([0,0,6])

def moveModel():
    global angle

    #Increment the angle based on elapsed time
    angle = angle + (SPEED * viz.elapsed())

    #Set the height of the object to double the sine of the angle
    height = math.sin(viz.radians(angle)) * 2.0

    #Update the models rotation
    h.setEuler([angle,0,0])

    #Translate the object
    h.setPosition([0,height,6])

#setup a timer and specify it's rate and the function to call
vizact.ontimer(UPDATE_RATE, moveModel)