How to use the pyroomacoustics.Room function in pyroomacoustics

from unittest import TestCase

import numpy as np

import pyroomacoustics as pra

room = pra.Room.shoeBox2D([0,0],[4,4],0)
s1 = [[0, 4], [2, 2]]
s2 = [[2, 2], [0, 4]]
s3 = [[4, 4], [0, 4]]
s4 = [[4, 4], [0, 4]]
s5 = [[0, 2], [2, 2]]

print('===ORIENTATION===')
print('orientation : ',room.ccw3p(np.array([[6, 4, 2], [0, 2, 0]])))

print('===ORIENTATION===')
print('orientation : ',room.ccw3p(np.array([[2, 4, 6], [0, 2, 0]])))

print('===INTERSECTION (0)===')
print('intersects : ',room.intersects(np.array(s4), np.array(s5)))

print('===INTERSECTION (1)===')

the_mesh = mesh.Mesh.from_file(args.file)
    ntriang, nvec, npts = the_mesh.vectors.shape
    size_reduc_factor = 500.  # to get a realistic room size (not 3km)

    # create one wall per triangle
    walls = []
    for w in range(ntriang):
        walls.append(
            pra.wall_factory(
                the_mesh.vectors[w].T / size_reduc_factor,
                material.absorption["coeffs"],
                material.scattering["coeffs"],
            )
        )

    room = pra.Room(
        walls,
        fs=16000,
        max_order=3,
        ray_tracing=True,
        air_absorption=True,
    )
    # Set options for the ray tracer
    room.set_ray_tracing(n_rays=30000, receiver_radius=0.5)

    room.add_source([-2.0, 2.0, 1.8])
    room.add_microphone_array(
        pra.MicrophoneArray(
            np.array([[-6.5, 8.5, 3+0.1], [-6.5, 8.1, 3+0.1]]).T, room.fs)
    )

    # compute the rir

t0 = 1./(fs*np.pi*1e-2)
absorption = 0.80
max_order_sim = 30
sigma2_n = 5e-7

room_dim = [5, 4, 6]
shoebox = pra.ShoeBox(
    room_dim,
    absorption=absorption,
    fs=fs,
    t0=t0,
    max_order=max_order_sim,
    sigma2_awgn=sigma2_n
    )

room = pra.Room(
        shoebox.walls,
        fs=fs,
        t0=t0,
        max_order=max_order_sim,
        sigma2_awgn=sigma2_n
        )

source_loc = [2, 3.5, 2]
mic_loc = np.array([[2, 1.5, 2]]).T
shoebox.addSource(source_loc)
room.addSource(source_loc)

room.addMicrophoneArray(pra.MicrophoneArray(mic_loc, fs))
shoebox.addMicrophoneArray(pra.MicrophoneArray(mic_loc, fs))

then = time.time()

Some information about the images is returned (including visibility at a certain point)
"""


# Simulation parameters
fs = 8000
t0 = 1./(fs*np.pi*1e-2)
absorption = 0.90
max_order_sim = 3
sigma2_n = 5e-7
pVis = [1,1] # this point is where we check visibility (warning : put 3 coordinates for 3D)


# Create the rooms
rooms = []
rooms.append(pra.Room.fromCorners(np.array([[0,5,5,3,3,2,2,0], [0,0,5,5,2,2,5,5]]),absorption,fs,t0,max_order_sim,sigma2_n))
rooms.append(pra.Room.shoeBox2D([0,0],[4, 4],absorption,fs,t0,max_order_sim,sigma2_n))
rooms.append(pra.Room.shoeBox3D([0,0,0],[6, 6, 6],absorption,fs,t0,max_order_sim,sigma2_n))


# Select an id corresponding to the room we want to show
# 0 = 2D "U room"
# 1 = 2D shoe box
# 2 = 3D shoe box
roomId = 1 # change this id to select a different room
room = rooms[roomId]


# Add a source to the room
sourcePos = [2,1] # position of the sound source (warning : put 3 coordinates for 3D)
room.addSource(sourcePos, None, 0)

# Simulation parameters
fs = 8000
t0 = 1./(fs*np.pi*1e-2)
absorption = 0.90
max_order_sim = 3
sigma2_n = 5e-7
pVis = [1,1] # this point is where we check visibility (warning : put 3 coordinates for 3D)


# Create the rooms
rooms = []
rooms.append(pra.Room.fromCorners(np.array([[0,5,5,3,3,2,2,0], [0,0,5,5,2,2,5,5]]),absorption,fs,t0,max_order_sim,sigma2_n))
rooms.append(pra.Room.shoeBox2D([0,0],[4, 4],absorption,fs,t0,max_order_sim,sigma2_n))
rooms.append(pra.Room.shoeBox3D([0,0,0],[6, 6, 6],absorption,fs,t0,max_order_sim,sigma2_n))


# Select an id corresponding to the room we want to show
# 0 = 2D "U room"
# 1 = 2D shoe box
# 2 = 3D shoe box
roomId = 1 # change this id to select a different room
room = rooms[roomId]


# Add a source to the room
sourcePos = [2,1] # position of the sound source (warning : put 3 coordinates for 3D)
room.addSource(sourcePos, None, 0)


# Plotting the result