"""
This script demonstrates how to use render nodes to create a virtual video camera.
Press spacebar to toggle the camera between panning and following the avatar.
Use the mouse and keyboard to navigate around the room.
"""
import viz
import vizact
import vizcam

viz.fov(60)
viz.go()

import vizinfo
vizinfo.InfoPanel()

# Use keyboard/mouse camera
cam = vizcam.WalkNavigate()
viz.cam.setHandler(cam)

# Add environment
model = viz.add('pit.osgb')

# Create render texture for camera video feed
video = viz.addRenderTexture()

# Create render node for camera
cam = viz.addRenderNode(size=(1280,720))

# Do not inherit view/projection settings from main window
cam.setInheritView(False)

# Set FOV for video camera
cam.setFov(60.0,1280/720.0,0.1,1000.0)

# Render to video feed texture
cam.setRenderTexture(video)

# Only render once per frame, in case stereo is enabled
cam.setRenderLimit(viz.RENDER_LIMIT_FRAME)

# Get handle to screen object and apply video feed to it
screen = model.getChild('screen')
screen.texture(video)

# Don't render to texture if screen isn't visible (optimization)
cam.renderOnlyIfNodeVisible([screen])

# Add avatar walking around in circles
avatar = viz.addAvatar('vcc_male2.cfg')
WalkSequence = vizact.sequence(
    vizact.walkTo((0,0,5))
    ,vizact.walkTo((5,0,0))
    ,vizact.walkTo((0,0,-5))
    ,vizact.walkTo((-5,0,0))
    ,viz.FOREVER
)
avatar.runAction(WalkSequence)

# Create attachment point for panning camera
pan_camera = viz.addGroup()
PanEulers = (100,45,0), (170,45,0)
pan_camera.setPosition([-10.94835, 11.09378, 13.61334])
pan_camera.setEuler(PanEulers[0])
PanAction = vizact.sequence(
    vizact.spinTo(euler=PanEulers[1],speed=5)
    ,vizact.spinTo(euler=PanEulers[0],speed=5)
    ,viz.FOREVER
)
pan_camera.runAction(PanAction)

# Create attachment point for following avatar
avatar_camera = viz.link(avatar,viz.NullLinkable)
avatar_camera.preTrans([0,2,-2])
avatar_camera.preEuler([0,10,0])

# Toggle between attachment points with spacebar
camera_link = viz.link(pan_camera,cam)
vizact.onkeydown(' ',camera_link.setSrc,vizact.choice([avatar_camera,pan_camera]))