Create a demo wall in the ARENA

arenademo.py

# demo wall placement
#
import argparse
import time
import arena
import random
import os
import json

def createDemoWall(dname, location, rotation):
    """Create a demo wall
    args:
    dname
      demo name, used for the names of objects created in the scene
    location
      x, y, z position of wall
    rotation
      rotation quaternion of the wall
    """
    # some defaults
    persist=True # False=objects will disappear after a reload (and only appear to clients already viewing the scene when they are created)
    wallcolor = (100, 100, 130)  # color of the poster wall

    # these will be the name of the objects in the scene
    rootName  = dname + '_root'
    wallName  = dname + '_wall'
    imgName   = dname + '_img'
    lightName = dname + '_light'
    lblName   = dname + '_lbl'
    siteLnkName = dname + '_sitelink'
    videoLnkName = dname + '_videolink'

    # invisible root object; all other objects children of this object
    root = arena.Object(
                objName=rootName,
                objType=arena.Shape.cube,
                location=location, # change the location of this object to move the poster wall
                transparency=arena.Transparency(True, 0), # invisible
                rotation=rotation,
                clickable=False,
                persist=persist)

    # back wall
    wall = arena.Object(
                objName=wallName,
                objType=arena.Shape.cube,
                location=(0, 0, 0),
                scale=(8, 9, .5),
                rotation=(0, 0.7071, 0, 0.7071),
                color=wallcolor,
                parent=rootName,
                clickable=False,
                persist=persist)

    # image on the wall
    img = arena.Object(
                objName=imgName,
                url='https://arena.andrew.cmu.edu/store/users/ececapstone/slides_imgs/Slide1.jpeg',
                objType=arena.Shape.image,
                scale=(5.5, 4, 4),
                location=(-0.3, 2.2, 0),
                rotation=(0, 0.7071, 0, -0.7071),
                clickable=False,
                parent=rootName,
                persist=persist)

    # button with link to the demo website
    sitelink = arena.Object(
                objName=siteLnkName,
                url='https://arena.andrew.cmu.edu/store/users/ececapstone/button_imgs/site.jpeg',
                objType=arena.Shape.image,
                scale=(.5, .5, .5),
                location=(-.3, 3.3, 3.3),
                rotation=(0, 0.7071, 0, -0.7071),
                clickable=True,
                parent=rootName,
                persist=persist,
                data='{"goto-url": { "dest":"popup", "on": "mousedown", "url": "http://course.ece.cmu.edu/~ece500/projects/f19-teama1/"} } ') # some random link

    # button with link to the demo video
    videolink = arena.Object(
                objName=videoLnkName,
                url='https://arena.andrew.cmu.edu/store/users/ececapstone/button_imgs/video.jpeg',
                objType=arena.Shape.image,
                scale=(.5, .5, .5),
                location=(-.3, 2.5, 3.3),
                rotation=(0, 0.7071, 0, -0.7071),
                clickable=True,
                parent=rootName,
                persist=persist,
                data='{"goto-url": { "dest":"popup", "on": "mousedown", "url": "https://youtu.be/S3_ZNI6a8e0"} } ') # some youtube video :-)

    # top label
    plbl = arena.Object(
                objName=lblName,
                objType=arena.Shape.text,
                scale=(0.5,0.5,0.5),
                location=(-0.35, 4.3, 0),
                rotation=(0, 0.7071, 0, -0.7071),
                clickable=False,
                data='{"text":"ECE Capstone 2020!"}',
                color=(252, 132, 3),
                parent=rootName,
    		    persist=persist)

    # light for the demo wall
    plight = arena.Object(
                objName=lightName,
                objType=arena.Shape.light,
                location=(-2, 2, 0),
                rotation=(0, 0, 1, 0),
                data='{"light":{"type":"point","distance":"10", "decay":".3"}}',
                clickable=False,
                parent=rootName,
                persist=persist)


if __name__ == '__main__':
    # a scene is the name of the 3d environment/room; can be anything
    # scene can be passed as argument or environment variable (SCENE)
    # open the scene in the browser: https://arena.andrew.cmu.edu/ececapstone
    dft_scene="ececapstone"
    parser = argparse.ArgumentParser(description=(
        "ARENA python program"))
    parser.add_argument('--host', dest='host', default=os.environ.get('MQTTH', "arena.andrew.cmu.edu"),
                        help='MQTT host')
    parser.add_argument('--scene', dest='scene', default=os.environ.get('SCENE', dft_scene),
                        help='ARENA Scene')
    parser.add_argument('--realm', dest='realm', default= os.environ.get('REALM', "realm"),
                        help='ARENA realm')

    args = parser.parse_args()

    if args.scene == None:
        print('Please provide a scene name (environment variable SCENE, or --scene [scene_name])')
        exit(1)

    # init the ARENA library
    print("Starting ARENA lib:" + args.scene + "," + args.realm + "," + args.host)
    arena.init(args.host, args.realm, args.scene)

    # create the wall objects; args: demo name; x, y, z position; rotation (quaternion)
    createDemoWall('demo1', (0, 0, -5), (0, -0.7071, 0, -0.7071))

    # This is the main ARENA event handler
    # Everything after this should be in callbacks
    print("starting main loop")
    time.sleep(5) # need to allow some time if not entering handle_events()
    #arena.handle_events()