Earth Moon Laser

from arena import *

def click_pointer(scene, evt, msg):
    """Emit a 1-second laser line and target for each user click"""
    if evt.type == "mousedown":
        start = evt.data.originPosition
        end = evt.data.targetPosition
        start.y = start.y - 0.1  # emit below user frustum for visibility
        line = ThickLine(path=(start, end), color=(255, 0, 0), lineWidth=5, ttl=1)
        ball = Sphere(position=end, scale=(0.03, 0.03, 0.03), color=(255, 0, 0), ttl=1)
        scene.add_objects([line, ball])

scene = Scene(host="arenaxr.org", scene="example")
earth = GLTF(
    object_id="gltf-model_Earth",
    scale=(5, 5, 5),
    url="store/users/wiselab/models/Earth.glb",
    clickable=True,
    persist=True,
    evt_handler=click_pointer,
    animation=Animation(
        property="rotation", end=(0, 360, 0), loop=True, dur=20000, easing="linear"
    ),
)
moon = GLTF(
    object_id="gltf-model_Moon",
    position=(0, 0.05, 0.6),
    scale=(0.05, 0.05, 0.05),
    url="store/users/wiselab/models/Moon.glb",
    persist=True,
    parent="gltf-model_Earth",
)
scene.add_objects([earth, moon])
scene.run_tasks()